- linaro-toolchain - lists.linaro.org

by Andrew Stubbs

Adjusted my 64-bit shifts patch to address Richard Earnshaw's concerns, tested it, and posted the new one upstream. Continued trying to figure out how ira-costs.c works, and in particular, why it doesn't choose to do 64-bit stuff in NEON when I think it should. Basically, the problem seems to be that when hard regs are *already* assigned, prior to IRA (say because they are function parameters or return values), then the allocator does not even consider the possibility of moving that value to another register unless it absolutely has to. It will merrily choose the worst possible option just because it's the easiest decision. Merged FSF GCC 4.5 into Linaro GCC 4.5. Likewise for 4.6. Pushed the branches to Launchpad for testing. The 4.5 testing did not come back totally clear, so this may delay the release a little. Hmmm. Updated my FSF GCC 4.7 checkout and rebuilt it. This time the build succeeded, so I've used it as the basis for a shiny new launchpad branch "lp:gcc-linaro/4.7". I've created the release series to go with it. Applied my new 64-bit shifts patch to the new GCC 4.7 Linaro branch and submitted a merge request. This is mostly for the purposes of getting the test results at this point.

13 years, 3 months

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native gdb for Android

by Barry Song

Hi guys, I compile a native gdb using linaro 2011.10 by “./configure --host=arm-none-linux-gnueabi --target=arm-none-linux-gnueabi”, and the gdb runs on arm target boards directly. # gdb GNU gdb (Linaro GDB) 7.3-2011.10 Copyright (C) 2011 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "arm-none-linux-gnueabi". For bug reporting instructions, please see: <http://bugs.launchpad.net/gdb-linaro/>. (gdb) I can use it to debug native programs on target boards directly. For example, attach process, set breakpoints, check registers and memory. One issue is I can't see multi-threads, for example: PID 646 is system_server by ps "646 1000 159m S system_server" Then I use gdb to attach it: # gdb attach 646 (gdb) info threads Id Target Id Frame * 1 process 646 "system_server" __ioctl () at bionic/libc/arch-arm/syscalls/__ioctl.S:15 as you see, “info threads” only shows one thread but there are several threads in system_server. But if I compile a new program based on glibc and gnu libthread, I can see multi-threads by the gdb. So my questions are: 1. Should I compile the native gdb using android toolchain and android bionic/libthread libraries? 2. Why can’t the current gdb capture multithreads for android processes? This question is actually about the theory for gdb to know multi-threads. In my opinion, both gnu and android use clone() to fork threads and threads in one process have same tgid in kernel and all threads return same getpid() value. Why not gdb just travel process lists to find multi-threads? Thanks Barry

13 years, 3 months

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[ACTIVITY] Jan 30 - Feb 3

by Thiago Jung Bauermann

Hi, * Learned the basics of bzr and examined the gdb-linaro repository. * Went through Michael Hope's steps to import upstream's 7.4 branch into bzr. * Explored gdb-linaro bugs and blueprints in Launchpad to familiarize myself with what has been done and is planned or proposed to be done. * Went through the gdb-linaro/7.3 branch to verify what needs to be forward-ported to gdb-linaro/7.4. Forward-ported 10 patches. * Checked which Linaro Connect sessions would be of interest for me to attend remotely, but found out that only one will be available for remote participation. * Worked very little on Wednesday since my laptop refused to turn on again after I hibernated it. I found out on the next day that plugging in an external monitor makes it happy again (I didn't have a monitor on Wed to try this out so I was stuck). Apparently the LCD screen died. -- []'s Thiago Jung Bauermann Linaro Toolchain Working Group

13 years, 3 months

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[ACTIVITY] weekly status

by Ken Werner

Hi, libunwind * reviewed small patch from T. R. of Nokia who provided a bugfix when searching for unwind table entry for an IP OpenEmbedded * build the OE-core images (minimal, sato and qt4e) with -O1 and -O0 * collected the ELF size and memory footprint and updated the charts * encountered an issue when compiling Qt 4.8.0 using -O0. It causes qdbusviewer fail to link because an .LTHUNK symbol survives * tested various compilers and optimization levels and noticed that the .LTHUNK symbols do also survive with higher optimization levels * only the Linaro and ARM CSL toolchains seem to be affected (FSF trunk, 46branch and 46release seem to work) * provided a reduced testcase and opened lp #924726 * Linaro cc1 emits undefined label when using -fPIC -Os (lp #924889) * already fixed upstream, Ramana is backporting to Linaro GCC * look into the external-toolchain branch from C. Larson: https://github.com/kergoth/oe-core/tree/external-toolchain and tested it against CSL 2011.03 -> works fine * started to document: https://wiki.linaro.org/KenWerner/Sandbox/OpenEmbedded-Core Regards, Ken

13 years, 3 months

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[ACTIVITY] Jan 30 - Feb 3

by Ulrich Weigand

== GCC == * Benchmarking the 4.6 backport of subreg forward-propagation confirmed that this is a net loss. On 4.7, microbenchmarks suggest a different outcome (due to register allocator enhancements), so I've created a 4.7 Bazaar branch including the patch and submitted it for benchmarking. * Implemented a patch to allow memory operands with vec_set and vec_extract to avoid excessive vmov generation in the PR 51819 test case. Patch shows no regression on microbenchmarks; full testing and benchmarking still outstanding. Mit freundlichen Gruessen / Best Regards Ulrich Weigand -- Dr. Ulrich Weigand | Phone: +49-7031/16-3727 STSM, GNU compiler and toolchain for Linux on System z and Cell/B.E. IBM Deutschland Research & Development GmbH Vorsitzender des Aufsichtsrats: Martin Jetter | Geschäftsführung: Dirk Wittkopp Sitz der Gesellschaft: Böblingen | Registergericht: Amtsgericht Stuttgart, HRB 243294

13 years, 3 months

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[ACTIVITY] report week 05

by Peter Maydell

RAG: Red: Amber: Green: Current Milestones: || || Planned || Estimate || Actual || ||cp15-rework || 2012-01-06 || 2012-02-20 || || ||qemu-kvm-getting-started || 2012-03-04?|| 2012-03-04?||2012-02-01 || (for blueprint definitions: https://wiki.linaro.org/PeterMaydell/QemuKVM) Historical Milestones: ||a15-usermode-support || 2011-11-10 || 2011-11-10 || 2011-10-27 || ||upstream-omap3-cleanup || 2011-11-10 || 2011-12-15 || 2011-12-12 || ||initial-a15-system-model || 2012-01-27 || 2012-01-27 || 2012-01-17 || == cp15-rework == * Since this isn't in the critical path any more we'll work on it next quarter, and adjust its priority/due dates post Connect. == qemu-kvm-getting-started == * finished writing up HowTo documents for reproducing the KVM prototype and running it on a Fast Model: https://wiki.linaro.org/PeterMaydell/KVM/HowTo * did the last bits of testing enough to be able to say we've done the initial prototype work for TCWG2011-A15-KVM, which means we can close out the qemu-kvm-getting-started blueprint. == other == * more upstream patch review, etc * LP:926012: patches to support prctl(PR_SET_NAME, ...) in linux-user mode, for the benefit of perl 5.14.

13 years, 3 months

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[ACTIVITY] w05

by Asa Sandahl

Hi! * -o2/-o3 benchmarking: Did some final work on the charts for the -O3 write up. * gcc-4.7 benchmarking: Worked on the charts for gcc-4.7 benchmarking. The Fortran tests in Spec2000 were missing from my runs. The reason was that I had mixed with the LD_LIBRARY_PATH in the cbuild make file on a previous occasion. :-( Created an internal wiki page for the results, modeled after Michael's page about -O3: https://wiki.linaro.org/Internal/ToolChain/Benchmarks/gcc-4.7_benchmarking * v8: No progress for JavaScript benchmarks this weak. https://wiki.linaro.org/AsaSandahl/Sandbox/JavaScriptBenchmarks * Bug triaging: Had a look at this bug. https://bugs.launchpad.net/gcc-linaro/+bug/923397 Regards Åsa

13 years, 3 months

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[Activity] Week 05

by Zhenqiang Chen

Summary: * Analyze PATH issues for win32 binary toolchain. Details: 1. Analyze PATH issues for win32 binary toolchain. * gcc can not find the install dir if user set PATH="INSTALL_DIR\bin" in dos cmdline, which leads to compile fail since gcc can not find ../lib, ../libexec, etc. * Root cause: in dos, " is taken as part of dirs during set PATH, which is different from cygwin or linux. And dir with " is invalid in dos. * Work out a patch to filter " in function make_relative_prefix_1 and discuss it with Michael. * Create an windows install package, so users do not need to set PATH. Will discuss more detail with Michael for the following releases. 2. Read document to ramp-up on gcc. Plans: * Feb 6-10: Linaro Connect Q1.12 Best regards! -Zhenqiang

13 years, 3 months

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Benchmark investigation at Connect

by Michael Hope

I've set up a new user on my laptop that we can use for experimenting with benchmarks during Connect. Here's what we've got: * A user called 'connect' * Ramana, Ulrich, Åsa, and myself can log in via SSH * bzr repo for trunk, 4.6, and gcc-linaro 4.6 * Tarballs of all gcc-linaro 4.4, 4.5, and 4.6 releases * Tarballs of the recent CSL, Google 4.6, and Android 4.4 compilers * A sysroot in ~/sysroot * Cross-binutils etch in ~/cross * A shared ccache in ~/ccache primed with these * A ~/env.sh that sets up the right paths etc * A ~/builds/doconfigure.sh that configures for our standard ARMv7-A C/C++/Fortran configuration * EEMBC, DENBench, and SPEC 2000 under ~/benchmarks The trees under build/ build into build/$ver/build and install into build/$ver/install. The benchmarks are set up to cross build and cross run. I've pulled ursa2 out of the farm and nuked it, so we can do something like: make CROSS_COMPILE=arm-linux-gnueabi- RUN="$PWD/sshrun ursa2" to run the benchmarks. I'll see about perf. We still need to re-baseline the benchmarks and get perf traces. Anything else needed? You can log in and try things if you want. Go through the bounce host and try connecting as connect@crucis. -- Michael

13 years, 3 months

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Improved use of vst1 via vec_extract (PR 51819 test case)

by Ulrich Weigand

Hi Ramana, as you pointed out, in the gcc.dg/vect/vect-double-reduc-6.c test case, using compiler options as described in PR 51819, we see the following inefficient code generation: vmov.32 r2, d28[0] @ 57 vec_extractv4si [length = 4] vmov.32 r1, d22[0] @ 84 vec_extractv4si [length = 4] str r2, [r0, #4] @ 58 *thumb2_movsi_vfp/7 [length = 4] vmov.32 r3, d0[0] @ 111 vec_extractv4si [length = 4] str r1, [r0, #8] @ 85 *thumb2_movsi_vfp/7 [length = 4] vst1.32 {d2[0]}, [r0:64] @ 31 neon_vst1_lanev4si [length = 4] str r3, [r0, #12] @ 112 *thumb2_movsi_vfp/7 [length = 4] bx lr @ 120 *thumb2_return [length = 12] (The :64 alignment in vst1.32 is incorrect; that is that actual problem in PR 51819, which is now fixed.) The reason for this particular code sequence turns out to be as follows: The middle end tries to store the LSB vector lane to memory, and uses the vec_extract named pattern to do so. This pattern currently only supports an "s_register_operand" destination, and is implemented via vmov to a core register. The contents of that register are then stored to memory. Now why does any vst1 instruction show up? This is because combine is able to merge the vec_extract back into the store pattern and ends up with a pattern that matches neon_vst1_lanev4si. Note that the latter pattern is actually intended to implement NEON built-ins (vst1_lane_... etc). Now there seem to be two problems with this scenario: First of all, the neon_vst1_lane<mode> patterns seem to be actually incorrect on big-endian systems due to lane-numbering problems. As I understand it, all NEON intrinsics are supposed to take lane numbers according to the NEON ordering scheme, while the vec_select RTX pattern is defined to take lane numbers according to the in-memory order. Those disagree in the big-endian case. All other patterns implementing NEON intrinsics therefore avoid using vec_select, and instead resort to using special UNSPEC codes -- the sole exception to this happens to be neon_vst1_lane<mode>. It would appear that this is actually incorrect, and the pattern ought to use a UNSPEC_VST1_LANE unspec instead (that UNSPEC code is already defined, but nowhere used). Now if we make that change, then the above code sequence will contain no vst1 any more. But in any case, expanding first into a vec_extract followed by a store pattern, only to rely on combine to merge them back together, is a suboptimal approach. One obvious drawback is that the auto-inc-dec pass runs before reload, and therefore only sees plain stores -- with no reason whatsoever to attempt to introduce post-inc operations. Also, just in general it normally works out best to allow the final choice between register and memory operands to be make in reload ... Therefore, I think the vec_extract patterns ought to support *both* register and memory destination operands, and implement those via vmov or vst1 in final code generation, as appropriate. This means that we can make the choice in reload, guided as usual by alternative ordering and/or penalties -- for example, we can choose to reload the address and still use vst1 over reloading the contents to a core register and then using an offsetted store. Finally, this sequence will also allow the auto-inc-dec pass to do a better job. The current in-tree pass doesn't manage unfortunately, but with Richard's proposed replacement, assisted by a tweak to the cost function to make sure the (future) address reload is "priced in" correctly, I'm now seeing what appears to be the optimal code sequence: vst1.32 {d6[0]}, [r0:64]! @ 30 vec_extractv4si/1 [length = 4] vst1.32 {d22[0]}, [r0]! @ 56 vec_extractv4si/1 [length = 4] vst1.32 {d2[0]}, [r0:64]! @ 82 vec_extractv4si/1 [length = 4] vst1.32 {d4[0]}, [r0] @ 108 vec_extractv4si/1 [length = 4] bx lr @ 116 *thumb2_return [length = 12] (Again the :64 is wrong; it's already fixed on mainline but I haven't pulled that change in yet.) The attached patch implements the above-mentioned changes. Any comments? I'll try to get some performance numbers as well before moving forward with the patch ... (As an aside, it might likewise be helpful to update the vec_set patterns to allow for memory operands, implemented via vld1.) (See attached file: diff-gcc-arm-vecextractmem) B.t.w. I'm wondering how I can properly test: - that the NEON intrinsics still work - that everything works on big-endian Any suggestions would be appreciated! Mit freundlichen Gruessen / Best Regards Ulrich Weigand -- Dr. Ulrich Weigand | Phone: +49-7031/16-3727 STSM, GNU compiler and toolchain for Linux on System z and Cell/B.E. IBM Deutschland Research & Development GmbH Vorsitzende des Aufsichtsrats: Martina Koederitz | Geschäftsführung: Dirk Wittkopp Sitz der Gesellschaft: Böblingen | Registergericht: Amtsgericht Stuttgart, HRB 243294

13 years, 3 months

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Building at -O3 write up

by Michael Hope

One of our cards this quarter was -O3 as a performance theme which included doing a write up on the advantages and usability of -O3. This write up is at: https://wiki.linaro.org/Internal/ToolChain/BuildingAtO3 A sanitised version with non-sharable benchmark data is at: https://wiki.linaro.org/Internal/ToolChain/BuildingAtO3 Could someone review it for me please? Both facts and style. Peter, care to nit it? -- Michael

13 years, 3 months

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Android SMP Session - request for participation

by Mounir Bsaibes

The Linaro Android team has scheduled an SMP session and is requesting some participation from the Toolchain WG. The session's blueprint to subscribe to: https://blueprints.launchpad.net/linaro-android/+spec/linaro-platforms-q112… Zach, If this is not the correct session, please let the team know. Thanks, Mounir -- Mounir Bsaibes Project Manager Follow Linaro.org: facebook.com/pages/Linaro/155974581091106 http://twitter.com/#!/linaroorg http://www.linaro.org/linaro-blog <http://www.linaro.org/linaro-blog>

13 years, 3 months

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GCC 4.7 import

by Michael Hope

Hi Andrew. gcc-4.7~svn183693 just finished running through the auto builders and builds and tests in the ARM, Cortex-A9, i686, and x86_64 configurations. You could base the Linaro 4.7 branch off that. It's r114897 in bzr and, suitably, Sandra is the author. -- Michael

13 years, 3 months

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bzr, quick pulls, and new branches

by Michael Hope

For your records: Loïc wrote a script that pushes the revisions from a GCC branch into the current development focus. This makes branching on a shared repository much faster. The script is here: http://bazaar.launchpad.net/~linaro-toolchain-dev/cbuild/tools/view/head:/e… and it runs daily on a cronjob as the cbuild user on the 'apus' EC2 instance (phew). We'll need to update this when 4.7 comes along. -- Michael

13 years, 3 months

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KVM/Fast Models howto wiki pages updated

by Peter Maydell

I've gone through the documentation on the wiki about how to get going with KVM on Fast Models, to clean it up and reorganise it and add some of the missing bits (notably how to set up a KVM guest kernel and filesystem). It's now at: https://wiki.linaro.org/PeterMaydell/KVM/HowTo The only minor point I'd still like to address is that at the moment we document the old-style "build your kernel and arguments into an .axf file" boot-wrapper, because my changes to support specifying them at model runtime haven't yet gone into the boot-wrapper git repo. When they do land I'll update the wiki. (Yes, technically TCWG2011-A15-KVM says "one page summary" but I thought splitting it into four pages was much clearer :-)) -- PMM

13 years, 3 months

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Adding lower optimisations into the mix

by Michael Hope

Ken, Åsa: could you add a -O0 and -O1 build to the size and benchmark results? I'm looking at the writeup and it would be interesting to contrast the speed/size of -O0 with -O2. Ta, -- Michael

13 years, 3 months

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[ACTIVITY] January 23rd-27th

by Andrew Stubbs

Continued work on 64-bit shifts in core registers. This has now been posted to gcc-patches, and is awaiting review. 64-bit shifts in NEON are also working correctly, but the register allocator chooses not to use them most of the time. I've begun trying to work out why, but it's quite involved in ira-costs.c and will take some unpicking, I think. Attempted to create a Linaro GCC 4.7 branch, but my test build failed, so that'll have to wait until it's stabilized a little.

13 years, 3 months

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sysroots for the next binary toolchain release

by Michael Hope

Hi Marcin, Ricardo. How is the work on pre-built sysroots coming along? I'd like to use/reference them in the next binary toolchain release. I'm looking for: * Scripts that produce the sysroots * A README that covers what they contain and how to reproduce them * Test plan * An official tagged branch holding the above * A tarball release of the above * A tarball release of the different sysroots * Done in a way so they easily integrate with the binary builds[1] and are useful to others as a sysroot * Relocatable * Usable on win32 and Linux all hosted somewhere. Zhenqiang and I can test and give you feedback. For reference, here's the README for the binary builds: http://launchpadlibrarian.net/90998258/README.txt Here's the simple script I used to make a libc only sysroot: http://bazaar.launchpad.net/~linaro-toolchain-dev/crosstool-ng/linaro/view/… I used chdist as I don't know multistrap. I guessed and added build-dep support to download the build dependencies. It also fixes up the absolute symlinks to relative. -- Michael [1] https://launchpad.net/linaro-toolchain-binaries

13 years, 3 months

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[Activity] Week 4 - W/e 27th January

by Ramana Radhakrishnan

==Progress=== * Fixed PR48308 on FSF trunk. Needs backporting to FSF GCC 4.6 branch * Fixed a number of failing testcases on trunk. * Read up on Partial-partial PRE . Slow progress but getting a handle on the theory now. A couple of approaches being benchmarked . Still slow progress. * Debugged Andrew's issues with 64 bit shifts. Nice that skype screen sharing works well on Ubuntu. * Started notes for Connect 2012.q1. * Looked into the strd / strexd failure on the testcase in trunk. Looked at a small patch to implement sync_lock_releasedi for ARM but needs some more time and effort. Filed issue https://bugs.launchpad.net/gcc-linaro/+bug/922474 === Plans === * Finish 1x AFDS * Continue with partial-partial PRE . * Finish backport of fix for PR50313 to appropriate branches * Start preparing for Connect 2012.q1 * Do something about the PGO and ABI patches next week. Absences. * Feb 6-10 : Linaro Connect Q1.12. * Feb 13- 18 : Holiday.

13 years, 3 months

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[ACTIVITY] weekly status

by Ken Werner

Hi, * libunwind * reviewed small patch from T. R. of Nokia who provided a bugfix in case unwind instructions are popping VFP registers * exchanged mails with P. W. from Bosch who encountered a crash in case DWARF info is involved * OpenEmbedded * changed Qt build to respect the optimization flags * wrote a script around QEMU to measure the memory footprint using named pipes to communicate with the serial console of the guest * rebuilt the minimal, sato and qt4e images using the gcc-linaro-arm-linux-gnueabi-2012.01-20120125_linux (optimization levels: -O2, -O3 -fno-tree-vectorize and -O3) * collected/updated the ELF size and memory footprint results: * https://docs.google.com/spreadsheet/ccc?key=0AmsCLxCMnnISdDNQSEM2ZHIxd3dVNj… * https://docs.google.com/spreadsheet/ccc?key=0AmsCLxCMnnISdHFtZll0OWdiTlhpdj… * uploaded the image packs to: http://people.linaro.org/~kwerner/oe-core/ * prepared the environment to build the images using -O1 Regards, Ken

13 years, 3 months

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[ACTIVITY] Jan 23 - Jan 27

by Ulrich Weigand

== GDB == * Committed follow-on patch to fix cosmetic issues resulting from the remote "info proc" patch set. == GCC == * Created 4.6 backport branch including Richard's subreg forward- propagation branch, the modes-tieable patch, and the combine.c regression fix, and evaluated for correctness and performance. Investigation of performance regressions uncovered a problem in the register allocator: tied subregs (validly) cause somewhat larger register pressure in certain cases, and this caused the 4.6 IRA to generate spills. Note that the 4.7 IRA is still able to allocate every pseudo in the very same code; this is a result of Vladmir's significant IRA rewrite in 4.7 ... * Investigated Ramana's vld1 patches, and a problem with excessive vmov's in the PR 51819 test case pointed out by Ramana. It turns out that when we extract a lane from a vector to memory using an offsetted address, we move the value through a core register instead of simply computing the address and using vst1. I'm working on a patch to address this. Mit freundlichen Gruessen / Best Regards Ulrich Weigand -- Dr. Ulrich Weigand | Phone: +49-7031/16-3727 STSM, GNU compiler and toolchain for Linux on System z and Cell/B.E. IBM Deutschland Research & Development GmbH Vorsitzender des Aufsichtsrats: Martin Jetter | Geschäftsführung: Dirk Wittkopp Sitz der Gesellschaft: Böblingen | Registergericht: Amtsgericht Stuttgart, HRB 243294

13 years, 3 months

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[ACTIVITY] report week 04

by Peter Maydell

RAG: Red: Amber: Green: Current Milestones: || || Planned || Estimate || Actual || ||cp15-rework || 2012-01-06 || 2012-02-20 || || ||qemu-kvm-getting-started || 2012-03-04?|| 2012-03-04?|| || (for blueprint definitions: https://wiki.linaro.org/PeterMaydell/QemuKVM) Historical Milestones: ||a15-usermode-support || 2011-11-10 || 2011-11-10 || 2011-10-27 || ||upstream-omap3-cleanup || 2011-11-10 || 2011-12-15 || 2011-12-12 || ||initial-a15-system-model || 2012-01-27 || 2012-01-27 || 2012-01-17 || == cp15-rework == * discussions with Rusty == qemu-kvm-getting-started == * wrote patches for the A15 Fast Models boot-wrapper that allow you to pass the kernel/initrd/kernel command line via a parameter to the model rather than having to hard code them into an ELF file along with the boot-wrapper. This should make life a lot easier for the validation folk. * various discussions with validation/etc about what you can and can't do with a model and what the best setup is going to be * sorted out a Debian fs to use for KVM guest : this is needed because the kernel module doesn't do Thumb or VFP yet. * started on rearranging and improving the writeup/HOWTO on the wiki == other == * target-arm/arm-devs queues pushed upstream [Calxeda Highbank model is now in upstream QEMU] * helping Will Deacon track down what looks like a race condition in Linux's handling of VFP on SMP where signal handlers are involved * a QEMU Object Model patch series has landed upstream -- this will be a nasty rebase for qemu-linaro next week I think

13 years, 3 months

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[ACTIVITY] w04

by Asa Sandahl

Hi! * -o2/-o3 benchmarking: Worked on and shared charts for the -o2/-o3 benchmark runs with gcc-linaro-4.6-2012.01. I have created charts for both the score of the benchmarks and the sizes (text segment) of the executables. Making improvements continuously as I get feedback from the team. The charts are stored in GoogleDocs: https://docs.google.com/a/linaro.org/leaf?id=0B1IP4dZWVaxZOGZlM2UwMGQtOGQyZ… * gcc4.7 benchmarking: Did benchmark runs on a late revision of gcc4.7. Next week I will process the data and list regressions/improvements against gcc4.6.2 and gcc-linaro-4.6-2012.01. * v8: Investigated possibility of running SunSpider stand-alone on the v8 engine. Found out that there is a stand-alone driver included in WebKit. Have built v8 on x86 and ARM (on ARM it takes ~18 min) and run SunSpider and the v8 benchmark suite. Next step I will try to build with another toolchain. It is not Make but SCons that controls the build, so I am not sure how to do that. https://wiki.linaro.org/AsaSandahl/Sandbox/JavaScriptBenchmarks * Bug triaging: I have triaged all "easy" ones in the list of new tickets. Michael will help me look through the rest of new and incomplete bugs which are mostly old ones (waiting for someone to take some action) or very tricky ones. Regards Åsa

13 years, 3 months

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Re: GDB 7.4 released

by Michael Hope

On Wed, Jan 25, 2012 at 7:02 AM, Ulrich Weigand <Ulrich.Weigand(a)de.ibm.com> wrote: > > Hi Michael, > > GDB 7.4 has finally been released. What do we need to do to get the > 7.4-branch imported into Launchpad? I think last time (for 7.3) you did > that somehow ... Done as: lp:~linaro-toolchain-dev/gdb/7.4 and documented at: https://wiki.linaro.org/MichaelHope/Sandbox/GDBImport -- Michael

13 years, 3 months

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QEMU A15 guest writeup

by Michael Hope

Peter, could you review: https://wiki.linaro.org/WorkingGroups/ToolChain/QEMUARMGuestQ411 please? I'm interesting in anything I've missed or exaggerated. The audience is the TSC or people outside Linaro who are interested in a summary of the changes. -- Michael

13 years, 3 months

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Fwd: [cbuild] qemu-linaro-0~20120118+gitcc8661e armv7l completed

by Michael Hope

Hi Zygmunt. I've enabled the ARM native build on the QEMU auto builders. These are built in the validation lab on the Natty based tcpanda boards and end up on control under ~cbuild/cbuild/build/qemu-$version/qemu-$something.tar.xz. I've uploaded this build to http://people.linaro.org/~michaelh/incoming/qemu-armv7l-natty-cbuild236-tcp…. There's something wrong with embedding of the version number into the name. A quick 'does it run' test passes. Peter, could you check the configure log at: http://builds.linaro.org/toolchain/qemu-linaro-0~20120118+gitcc8661e/logs/a… and see if there's anything missing. The auto builders fire with each commit so there's always something up to date. You can list the builds at: http://ex.seabright.co.nz/helpers/buildlog/qemu and see the raw results at: http://builds.linaro.org/toolchain/qemu-linaro-0~20120118+gitcc8661e/logs/a… (after a lag) -- Michael ---------- Forwarded message ---------- From: Linaro Toolchain Builder <michael.hope+cbuild(a)linaro.org> Date: Thu, Jan 26, 2012 at 11:14 AM Subject: [cbuild] qemu-linaro-0~20120118+gitcc8661e armv7l completed To: "linaro-toolchain-builds(a)lists.launchpad.net" <linaro-toolchain-builds(a)lists.launchpad.net> tcpanda05 finished running job qemu-linaro-0~20120118+gitcc8661e on armv7l-natty-cbuild236-tcpanda05-cortexa9r1. The results are here: http://builds.linaro.org/toolchain/qemu-linaro-0~20120118+gitcc8661e 9 PASS 9 TEST This email is sent from a cbuild (https://launchpad.net/cbuild) based bot which is administered by Michael Hope <michael.hope(a)linaro.org>.

13 years, 3 months

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[ANNOUNCE] Linaro Toolchain Binaries 2012.01 released

by Michael Hope

The Linaro Toolchain Working Group is pleased to announce the release of the Linaro Toolchain Binaries, a pre-built version of Linaro GCC and Linaro GDB that runs on generic Linux or Windows and targets the glibc Linaro Evaluation Build. This is the first release. Releases will be made each month shortly after the corresponding source release. Uses include: * Cross compiling ARM applications from your laptop * Remote debugging * Build the Linux kernel for your board What's included: * Linaro GCC 2012.01 * Linaro GDB 2011.12 * A statically linked gdbserver * A system root * Manuals under share/doc/ The system root contains the basic header files and libraries to link your programs against. The Linux version is supported on Ubuntu 10.04.3 and 11.10, Debian 6.0.2, Fedora 16, openSUSE 12.1, Red Hat Enterprise Linux Workstation 5.7 and later, and should run on any Linux Standard Base 3.0 compatible distribution. Please see the README about running on x86_64 hosts. The Windows version is supported on Windows XP Pro SP3, Windows Vista Business SP2, and Windows 7 Pro SP1. The binaries and build scripts are available from: https://launchpad.net/linaro-toolchain-binaries/trunk/2012.01 Need help? Ask a question on https://ask.linaro.org/ Already on Launchpad? Submit a bug at https://bugs.launchpad.net/linaro-toolchain-binaries On IRC? See us on #linaro on Freenode. Other ways that you can contact us or get involved are listed at https://wiki.linaro.org/GettingInvolved. -- Michael

13 years, 3 months

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Re: -fsched-pressure options

by Michael Hope

On Wed, Jan 25, 2012 at 2:33 AM, Ulrich Weigand <Ulrich.Weigand(a)de.ibm.com> wrote: > > Michael, Åsa, > > as discussed in today's performance call, the 4.6 backport of Richard's > sched-pressure enhancements is available here: > https://code.launchpad.net/~rsandifo/gcc-linaro/alt-sched-pressure-4.6 > > To activate the feature, you need to use the options: > > -fsched-pressure -fsched-pressure-algorithm=model Åsa, I think we're ready to spawn benchmark jobs through the build farm. I've made a front end: http://ex.seabright.co.nz/helpers/scheduler/spawn to make it a little easier to use. To spawn a benchmark run, enter a job called benchmarks-<buildname> such as benchmarks-gcc-linaro-4.6+bzr106857~rsandifo~alt-sched-pressure-4.6 and spawn it into the 'test' queue. See the page for how to change the flags and benchmarks that are run. The results end up at: http://ex.seabright.co.nz/benchmarks/ which needs the password from: https://wiki.linaro.org/Internal/ToolChain I've spawned Ulrich's job into the queue as a test run. Let's see how it goes. If it works, you can spawn the ancestor (benchmarks-gcc-linaro-4.6+bzr106856) and later do a diffbench on the results. -- Michael

13 years, 3 months

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Bug triaging: 739305 "[armhf] libffi variadic support"

by Asa Sandahl

Hi, I am looking at ticket 739305 "[armhf] libffi variadic support" which still has status "New" for Linaro gcc. https://bugs.launchpad.net/ubuntu/+source/libffi/+bug/739305 If I understand correctly, David's patch is included in libffi in Oneiric, but not yet backported to Linaro gcc? What is the correct thing to do with this ticket for Linaro GCC? I was thinking it could be set to "Triaged", waiting for an appropriate time to backport. Regards Åsa

13 years, 3 months

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Linaro GCC mentioned in Phoronix article

by Christian Robottom Reis

Spotted this in a Phoronix article today: Overall it seems that most of the computational tests are performing better with the newer Ubuntu 11.10 and 12.04 user-space packages, which upgrades the GNU Compiler Collection to the 4.6 series over the 4.5 release found in Ubuntu 11.04. The 4.6 compiler upgrade with greater ARMv7 architecture enhancements is likely what can be attributed to most of the performance improvements found in this article. [...] See the results for yourself at: http://www.phoronix.com/scan.php?page=article&item=nvidia_tegra2_ubuntu&num… Good job, -- Christian Robottom Reis, Engineering VP Brazil (GMT-3) | [+55] 16 9112 6430 | [+1] 612 216 4935 Linaro.org: Open Source Software for ARM SoCs

13 years, 3 months

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agenda for tomorrow's call.

by Ramana Radhakrishnan

https://wiki.linaro.org/WorkingGroups/ToolChain/Meetings/2012-01-24 do folks have anything to add to this ? Ramana

13 years, 3 months

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[ACTIVITY] 16th - 20th January

by Andrew Stubbs

* Linaro Continued work on 64-bit multiplies. Cleaned up the patches a lot. Started testing work to check for correctness. Ironed out a few bugs. My turn for patch review week. * Other Spent most of the week in San Diego attending the formerly-known-as CodeSourcery annual meeting, now Mentor Graphics' ESD TOOLS team annual meeting.

13 years, 3 months

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[Activity] Week 3

by Ramana Radhakrishnan

Mostly bug hunting week with some time on Partial partial PRE. ==Progress=== * Fixed PR50313 - backport submitted to Linaro 4.6 branch for testing - Testing on FSF GCC 4.6 branch as well currently. * Followed up on PR48308 fix . No reply yet. * Triaged some of the test failures that we are currently seeing on FSF trunk. Reported a few bugs upstream which I think are now fixed. There are still too many vect failures for my liking ( nearly 30 odd unique) . Some of them are testisms and some of them probably need a bit of knowledge in the vectoriser. So could do with a hand here in case someone has some free time and needs things to look at . * Read up on Partial-partial PRE . Slow progress but getting a handle on the theory now. * Handed over the vld1 / vldm work to Uli - found another case where the compiler could do better while fixing up PR51819. Essentially in loop end code where we have cleanup code involving single elements from the vector, the backend prefers to move this to an integer register and store the value to memory which is just silly - See https://pastebin.linaro.org/385 * Fixed PR51819. Backported fix to Linaro 4.6 branch - The FSF 4.6 branch *doesn't* show this particular problem. === Plans === * Continue with partial-partial PRE . * Finish submitting PGO patch and ABI tests patch * Finish backporting PR50313 fix to the correct repositories. * Follow up on PR48308 and investigate this a bit further. * Start preparing for Connect 2012.q1 Absences. * Feb 6-10 : Linaro Connect Q1.12. * Feb 13- 18 : Holiday.

13 years, 3 months

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KVM tasks draft

by Michael Hope

I've taken the KVM Epic spec: https://wiki.linaro.org/WorkingGroups/ToolChain/Specs/KVMEpic and split this into a list of tasks: https://docs.google.com/spreadsheet/ccc?key=0Ap7fWLePADFVdHA3cTg1R3R2U2pzZ0… Mouse over the little orange triangle to see notes on what an item means.. There's a '1' in the column of each group that a task affects. I haven't put durations down. Some things are already under way outside Linaro. Comments? Feel free to edit directly. -- Michael

13 years, 3 months

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[ACTIVITY] Jan 16 - Jan 20

by Ulrich Weigand

== GDB == * Fixed some final minor issues with remote "info proc". Committed patch set to implement remote "info proc" (LP #804411) and remote core file generation (LP #804406) to mainline. Backported to Linaro GDB 7.3. == GCC == * Created patch to fix optimization failures on x86_64 exposed by Richard's subreg forward-propagation patch. * Set up Richard's loop-microbenchmarks suite and verified that the subreg forward-propagation patch causes no regression anywhere, and shows measurable improvements on some cases in GCC mainline. With the Linaro GCC 4.6 backport, results don't look as good; still investigating the cause. * Started looking into Ramana's vld1 patches. Mit freundlichen Gruessen / Best Regards Ulrich Weigand -- Dr. Ulrich Weigand | Phone: +49-7031/16-3727 STSM, GNU compiler and toolchain for Linux on System z and Cell/B.E. IBM Deutschland Research & Development GmbH Vorsitzender des Aufsichtsrats: Martin Jetter | Geschäftsführung: Dirk Wittkopp Sitz der Gesellschaft: Böblingen | Registergericht: Amtsgericht Stuttgart, HRB 243294

13 years, 3 months

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[ACTIVITY] weekly status

by Ken Werner

Hi, * hacked the external toolchain recipe to use the latest version of the binary toolchain this kind of reverts the multiarch changes since oe doesn't support it yet * built the minimal, sato and qt images for armv7-a in three different flavors (-O2, -O3 -fno-tree-vectorize, -O3) using gcc-linaro-arm-linux-gnueabi-2012.01-20120112+bzr2318~linux see: http://people.linaro.org/~kwerner/oe-core/ * encountered that binutils 2.22 (the gas) fails to build with -O3 due to a warning about an unitialized variable I'm not convinced this is a real bug, I'll look at it as time permits workaround: --disable-werror * all nine of them (the images) are booting within qemu using vexpress_defconfig! There is one glitche with the mouse pointer: it doesn't match to the one of the SDL/VNC window as the guest pointer sometime accelerates faster that the host pointer I can hardly imagine this is due to miscompiled code * Extracted size informations about the generated ELF files: https://docs.google.com/spreadsheet/ccc?key=0AmsCLxCMnnISdDNQSEM2ZHIxd3dVNj… Regards, Ken

13 years, 3 months

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[ACTIVITY] report week 03

by Peter Maydell

RAG: Red: Amber: Green: A15 vexpress system model sufficient for KVM guest now done Current Milestones: || || Planned || Estimate || Actual || ||cp15-rework || 2012-01-06 || 2012-02-20 || || ||initial-a15-system-model || 2012-01-27 || 2012-01-27 || 2012-01-17 || ||qemu-kvm-getting-started || 2012-03-04?|| 2012-03-04?|| || (for blueprint definitions: https://wiki.linaro.org/PeterMaydell/QemuKVM) Historical Milestones: ||a15-usermode-support || 2011-11-10 || 2011-11-10 || 2011-10-27 || ||upstream-omap3-cleanup || 2011-11-10 || 2011-12-15 || 2011-12-12 || == cp15-rework == * some (slow) progress on this * made a list of the missing pieces in my current patchset and knocked off a few of the easier ones * fortunately this blueprint isn't really a critical blocker for KVM work any more == initial-a15-system-model == * vexpress-a15 now submitted upstream (in review) and in qemu-linaro * ...so this blueprint is complete * NB: doesn't boot in KVM but this is a trivial kernel-side issue == other == * this category seems to take most of my time :-( * patch review: still Calxeda, Samsung * patch review: softfloat type fixes * identified some bugs in softfloat and arm code that surface if a softfloat type is 64 bits (at the moment it is 32 bits in practice but it is being proposed to widen it) * wrote up the issues to be solved so somebody else can do qemu-linaro releases * got qemu-jeos building for ARM [an attempt at making qemu testing easier by having an automated "build toolchain/kernel/initrd" setup] * retested QEMU fused-multiply-accumulate against an A15 FPGA

13 years, 3 months

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Narrowing down regressions on trunk

by Michael Hope

Hi Åsa. The GCC 4.7 release is coming up and the ARM testsuite shows a lot of regressions: http://ex.seabright.co.nz/helpers/testlog/gcc-4.7~svn183205/logs/armv7l-nat… We've been running three builds a week: http://ex.seabright.co.nz/helpers/buildlog/gcc-4.7~svn and can use the result to track down the range of commits where a fault was introduced or exposed. Could you please look through the results and narrow down where each failure appeared? I've uploaded all of the results to: http://people.linaro.org/~michaelh/incoming/trunks.tar.xz One way is to look at the testsuite-diff.txt in each build as it should show the change in test results between one build and the next but might be incomplete. Another way is to pull the failures out of gcc-testsuite.txt and do a diff against the previous version. The output should be a revision range for each of the current failures. Script it up. Don't do it by hand. I'm not that mean. Ta, -- Michael

13 years, 3 months

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[ACTIVITY] w03

by Asa Sandahl

* Started with bug triaging, looked at four different bugs (including Michael's example). Challenging, but interesting. Got great help from Ramana and Andrew. * -o2/-o3 benchmark runs with gcc-linaro-4.6-2012.01 done. coremark, eembc, denbench, pybench and spec2000. Uploaded all results ~linaro-toolchain-wg/linaro-toolchain-benchmarks/private-runs. Posted results for -o2-neon vs -o3-neon-novect. Working on charts including also -o3-neon and -os. Got a bit too occupied with making the matplotlib charts look pretty. I will try to get all results posted next week. * Started the add-sunspider-as-a-benchmark blueprint in the background. Built the v8-engine stand alone on x86 (just with default options). It has a sample shell included. You can feed it with .js-files. Tried the v8 benchmark, which also comes with the engine. Regards Åsa

13 years, 3 months

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Absence next week (Jan 21-29, 2012)

by Zhenqiang Chen

Hi all, I will be out for vacation during Chinese Spring Festival (Jan 21-29, 2012). For emergency, call me at +86-13817948562. Best regards! -Zhenqiang

13 years, 3 months

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[ACTIVITY] Week 03

by Zhenqiang Chen

Summary: * Enhance crosstool-ng build process. Details: 1. Linaro crosstool-ng patches: * Update and commit the patch to strip debug sections. * rm *-cc.exe symblink for win32. * enable gdb for win32 (lp:918479) * Update README to add flip dependence for build. 2. Verify the following bugs and change status to "Fix Committed" * lp:906729 baremetal libc headers and libraries are in inconsistent places * lP:906077 binaries: baremetal include files are in the wrong place * lP:894527 binaries: remove all symlinks from the Windows build * lp:889984 binaries: should step across helper functions * lp:906662 binaries: pgversion can get out of sync with product 3. Analyzed bugs * lp:915137 Link failure due to absolute paths: Need more information to reproduce. * lp:p18478 wind32 doesn't have pkg-config: Try to build pkg-config for mingw32 host. But failed since it required preinstalled glib2. And configure error if cross building the glib. * lp:894528 binaries: can't run if the patch contains whitespace. Can not reproduce it on cygwin, but still have issue in DOS cmdline 4. Verify the prerelease binary package on windows. And find and workaround a gdb document name issue since filename on windows is case insensitive (lp:909195). 5. Raise the gcc trunk build fail issue to crosstool-ng mail-list. But not confirm "-EL" is the final root cause. Need more investigation. Planned Absence: * Jan 21-29, 2012 Chinese Spring Festival Best regards! -Zhenqiang

13 years, 3 months

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cross compiling eglibc with Linaro toolchain

by shyamalan sivan

Hello experts, I don't know whether this is the place to ask this question.Please forgive if i am wrong. I am trying to cross-compile Eglibc,(which i thought is similar to the glibc) library with Linaro tool chain.My aim is to cross-compile the library and add it with the tool-chain( i assumed that Linaro doesn't ahve the eglibc libraries by itself). . I referred to the link http://www.eglibc.org/archives/patches/msg00078.html (README.cross-compiling of the libc) and did the following. I thought that binutils is not required as the tool chain itself contains the loader, assembler etc.(which are the most important in the binutils).So i skipped that step.(i am not sure whether this is right.please correct me if i am wrong). I did the below steps as in the above link. 1) Copied the Linux Kernel Headers 2) EGLIBC Headers and Preliminary Objects 2.1) configuring the Eglibc headers by the below steps. appan@oplt$ ~/cross_compile_eglibc/ppc/obj/eglibc-headers$ BUILD_CC=gcc CC=/home/appan/cross_compile_eglibc/ppc/tools/bin/arm-linux-gnueabi-gcc CXX=/home/appan/cross_compile_eglibc/ppc/tools/bin/arm-linux-gnueabi-cpp AR=/home/appan/cross_compile_eglibc/ppc/tools/bin/arm-linux-gnueabi-ar RANLIB=/home/appaan/cross_compile_eglibc/ppc/tools/bin/arm-linux-gnueabi-ranlib /home/appan/cross_compile_eglibc/src/libc/configure --prefix=/home/appan/CC_EGLIBC --with-headers=/home/appan/cross_compile_eglibc/ppc/sysroot/usr/include/ --build=i686-pc-linux-gnu --host=arm-unknown-linux-gnu --enable-add-ons --with-tls --with-__thread 2.2) compilation make install-headers install_root=$sysroot install-bootstrap-headers=yes But following is the error i get. > /home/appan/cross_compile_eglibc/ppc/obj/eglibc-headers/Versions.v.iT<http://versions.v.it/> In file included from <stdin>:1:0: ports/sysdeps/arm/nptl/tls.h:48:3: error: #*error "TLS support is required.* " make[1]: *** No rule to make target `headers_install'. Stop. make[1]: Leaving directory `/home/appan/cross_compile_eglibc/src/libc' make: *** [headers_install] Error 2 I tried googling, but i did not get the solution for this.. please provide me with some suggestions and that will be of great help to me... thanks and regards appan

13 years, 3 months

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Automatically save preprocessed source on ICE

by Asa Sandahl

Hi there! I need some help with how to handle this bug: https://bugs.launchpad.net/gcc-linaro/+bug/873977 It looks like an improvement suggestion more than a bug. Regards Åsa *Automatically save preprocessed source on ICE*In order to help with bug reporting, gcc could save the preprocessed source of the unit that caused the ICE, so one can just pick it up and attach it to bug reports instead of trying to reproduce it manually.

13 years, 3 months

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KVM and OpenStack integration

by Michael Hope

Hi Peter. I've had a poke about in qemu-linaro, OpenStack, and libvirt to get a feel for the KVM integration work. My scratch notes are here: https://wiki.linaro.org/MichaelHope/Sandbox/QEMUA15GuestNotes I'm feeling happy about the integration. The parts that I've seen have good separation, are architecture neutral, and have some ARM support. We can prototype using virtual x86 based masters and QEMU TCG based compute instances. I've seen a few bugs and assumptions: OpenStack defaults to virtio, boot=hda, and fixed kernel args; and libvirt can't parse the the qemu-linaro version string. There will be more. I'll feed this into the KVM 1.0 task list and share it. -- Michael

13 years, 3 months

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New conference call number

by Michael Hope

Hi there. Starting next week we'll switch to the Zip conference line. See: https://wiki.linaro.org/Resources/ZipConferenceLine under 1-719-457-1414 for a list of numbers. A selected few are: UK 0 808 101 1146 Germany 0 800 181 9019 Sweden 02 079 7556 Brazil, Sao Paulo Local +55 11 5582 6534 Australia 1 800 105 680 China +400 148 5400 NZ 0800 451 015 The code is 763 804 0680. I've updated the meeting calendar and will update the wiki page once Monday comes around. The moderator code is on the toolchain internal page. Amber, could you update the public event please? Ramana, could you update the performance call for two weeks time? Maybe move it to linaro-events so I can edit it. -- Michael

13 years, 3 months

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Cross-compiling Eglibc library with Linaro toolchain

by Amber Graner

Hi all, In my search for Linaro related news this morning, I saw a tweet from Linuxquestions.org referencing a cross-compiling questions. Here is the link to the post on Linuxquestions.org - http://www.linuxquestions.org/questions/linux-embedded-78/cross-compiling-e… Thanks, I'll answer from the Linaro Tweeter account that it's been past to the Linaro Developers. Cheers, Amber -- Amber Graner User Experience and Community Specialist Linaro.org <http://www.linaro.org/>* **│ *Open source software for ARM SoCs* *** Follow *Linaro: *Facebook <http://www.facebook.com/pages/Linaro> | Twitter<http://twitter.com/#%21/linaroorg> | Blog <http://www.linaro.org/linaro-blog/> *+1.828.582.9469* cell *+1.828.395.1049* office irc: akgraner amber.graner(a)linaro.org (email and Google chat)

13 years, 3 months

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Triage of #914703

by Asa Sandahl

Hi Michael, So, I gave my best shot at: https://bugs.launchpad.net/gcc-linaro/+bug/914703 Kind of similar to the one in your walk-through, but I couldn't actually reproduce on the version reported. Could you please check if this looks OK? Regards Åsa

13 years, 3 months

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Bug triage run-through

by Michael Hope

Hi Åsa. I've triaged a bug and written down my notes on the way. See: https://wiki.linaro.org/MichaelHope/Sandbox/TriageRunThrough This one turned out to be easy but at least you have the basics. Could you triage the bug for real and see what I've missed? I'm unsatisfied with the result on that bug. The fault is in the Ubuntu Natty compiler which we've long since fixed in Linaro GCC. It would be nice if we could point the bug reporter to an updated GCC. Ask Marcin and Matthias what they think. -- Michael

13 years, 3 months

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[ACTIVITY] Week 02

by Zhenqiang Chen

Summary: * Enhance crosstool-ng build process. Details: 1. crosstool-ng patches: * Reproduce the build process by following the README and enhance the document. * Update .config to strip all toolchain executables * Replace harded-coded VERSION by reading config file. * Remove host libiberty.a * Patch on how to strip debug sections is in discussion. 2. Update the crosstool-ng based embedded toolchain build scripts according to the review comments. And replace most of hard-coded config by reading them from .config. 3. Unexpected build fail for gcc 4.7/trunk from crosstool-ng due to unsupported ENDIAN_LDFLAG "-EL", which is used in "LDFLAGS_FOR_TARGET" to build libstdc++. (LDFLAGS_FOR_TARGET seams not used in gcc 4.6). Need more investigation. Plan: * Fix the binary build related bugs. * Ramp-up on gcc. Planned Absence: * Jan 21-29, 2012 Chinese Spring Festival Best regards! -Zhenqiang

13 years, 4 months

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uImage built with pre-built linaro toolchain failed to start

by Lv Terry-R65388

Hi, I use pre-built version of linaro toolchain (got from http://people.linaro.org/~michaelh/incoming/binaries/) to build a uImage. The build succeeded, but the uImage couldn't start. The console hangs at: Using FEC0 device TFTP from server 10.193.100.158; our IP address is 10.193.102.233 Filename 'uImage_linaro'. Load address: 0x70800000 Loading: ################################################################# ################################################################# ################################################################# ####################### done Bytes transferred = 3193292 (30b9cc hex) ## Booting kernel from Legacy Image at 70800000 ... Image Name: Linux-2.6.38-01026-gc9c8ead Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 3193228 Bytes = 3 MB Load Address: 10008000 Entry Point: 10008000 Verifying Checksum ... OK Loading Kernel Image ... OK OK Starting kernel ... Uncompressing Linux... done, booting the kernel. Does anyone meet this before? How can I fix it? Thanks~~ Yours Terry

13 years, 4 months

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[ACTIVITY] w02

by Asa Sandahl

* Started with some day-to-day activities in the team. Looking after the proposals and the cbuild scheduler. Will start Created problem log for scheduler problems, there is a link to it from the jobs page. https://wiki.linaro.org/WorkingGroups/ToolChain/SchedulerProblems * Worked on producing graphs for benchmark results using matplotlib. Michael: Would it be ok to put my script in linaro-toolchain-benchmarks/scripts? * Kicked off some benchmarks with gcc-linaro-4.6-2012.01. To start with coremark, eembc, denbench, pybench and spec2000. We will see what's there after the weekend. Variants: os-neon, o2-neon, o3-neon-novect and o3-neon. /Regards Åsa

13 years, 4 months

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[ACTIVITY] Jan 09 - Jan 13

by Ulrich Weigand

== GDB == * Implemented, tested, and posted for discussion yet another version of remote support for "info proc" and core file generation, this time via accessing /proc files via generic file I/O primitives. == GCC == * Tested and merged Revital's fix for LP #879725. * Tested Richard's patch to help code generation for NEON strided loads by enabled forward-propagation of subreg expressions. This caused optimization failures on x86_64; investigated the root cause and engaged in discussion on mailing list on potential fixes. * Helped Ramana look into PR 43808 and PR 50313. Mit freundlichen Gruessen / Best Regards Ulrich Weigand -- Dr. Ulrich Weigand | Phone: +49-7031/16-3727 STSM, GNU compiler and toolchain for Linux on System z and Cell/B.E. IBM Deutschland Research & Development GmbH Vorsitzender des Aufsichtsrats: Martin Jetter | Geschäftsführung: Dirk Wittkopp Sitz der Gesellschaft: Böblingen | Registergericht: Amtsgericht Stuttgart, HRB 243294

13 years, 4 months

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[ACTIVITY] 9th - 13th January

by Andrew Stubbs

Continued work on 64-bit shifts. I've tidied up most of the nastiness I had in my first attempt at this work, unified the logic into fewer places, and fixed the one logic error that I knew about. I had a mysterious reload bug that just wouldn't go away, but having stared at it for some time I've decided that what I was doing wasn't the best option in any case, and the new way seems to work. I still have the problem that register-allocation prefers to allocate the values in core-registers, even when it would seem to me to work better in NEON. This maybe because the shift amount must be negated in some cases, and there isn't a neon instruction for that. Continued trying to use LAVA to do builds. Unfortunately this seems to have hit against a lava-test bug. Filed as lp:915915.

13 years, 4 months

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[ACTIVITY] weekly status

by Ken Werner

Hi, * built linaro binary toolchain using Michaels crosstool-ng environment: * disabled multiarch and pkg-config * uses eglibc 2.13 (due to RPC headers) * using Linux kernel version 2.6.32.48 (longterm) * debugged why /sbin/init fails when using the linaro binary toolchain: * the loader and libc of the binary toolchain is build for armv7 * the binaries (init, busybox, ...) are linked against this glibc and using the libdl-2.13.so of the binary toolchain * it causes the boot to fails due to illegal insn caused by the dl * built the minimal image for armv7-a: * use the vexpress_defconfig of linaro 3.1 tree linux-linaro-3.1.git (instead of the OE vesatilebp kernel) * boots fine using the vexpress-a9 QEMU system model * sato image (X and gtk+ apps) for armv7-a: * Tremor (vorbis): inline assembly only supports ARM mode quick workaround: undefine _ARM_ASSEM_ to fall back to C * pulseaudio/libatomics-ops: inline asm that only supports ARM mode quick workaround: use the latest version from upstream * gtk+_2.24.8 fails due to the libstdc++ libtool archive easy fix: delete the *la files (just like most of the distributors) the *la files prevent the the binary toolchain from being "relocatable" * sato image boots and shows the gui but the X resolution is higher and the X cursor behaves strange (probably not a miscompile but a difference of the linaro kernel) Regards, Ken

13 years, 4 months

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[ACTIVITY] report week 02

by Peter Maydell

RAG: Red: Amber: Green: good progress on A15 vexpress system model Current Milestones: || || Planned || Estimate || Actual || ||cp15-rework || 2012-01-06 || 2012-02-20 || || ||initial-a15-system-model || 2012-01-27 || 2012-01-27 || || ||qemu-kvm-getting-started || 2012-03-04?|| 2012-03-04?|| || (for blueprint definitions: https://wiki.linaro.org/PeterMaydell/QemuKVM) Historical Milestones: ||a15-usermode-support || 2011-11-10 || 2011-11-10 || 2011-10-27 || ||upstream-omap3-cleanup || 2011-11-10 || 2011-12-15 || 2011-12-12 || == cp15-rework == * estimate shifted back since it turns out we can do something useful in initial-a15-system-model without this as a prerequisite, so that's a better order to do things in == initial-a15-system-model == * I now have a working vexpress-a15 board model, and enough of the a15 private peripheral region and CPU definition that we can boot a kernel compiled for A15-without-LPAE * patchseries mostly looks ok to upstream but there are some loose ends to fix up involving SMP secondary boot CPU protocol and making sure the right one of the two graphics controllers gets to display things; also it depends on some patches in the Calxeda/Samsung patchseries == other == * patch review: Calxeda now basically ready to commit, another round with Samsung * made qemu-linaro 2012.01 release * usual round of meetings etc

13 years, 4 months

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[ACTIVITY] Week 2

by Ramana Radhakrishnan

==Progress=== * Backported one part of the partial-partial PRE patch . Still looking into it. * Investigate PR48308 - a bug where combine was generating incorrect transformations. * Reopened PR50313 - a bug which I originally thought was a dup of PR48308. * Looked at upstream bugzilla for sometime and triaged a few bugs. * Linaro patch review. === Plans === * Continue looking at partial-partial PRE and try and understand it further. * Look at PR50313 further * Upstream patch review. * Finish submitting PGO patch and ABI tests patch * Look at Andrew's patches for neon shifts - Absences. * Feb 6-10 : Linaro Connect Q1.12. * Feb 13- 18 : Holiday.

13 years, 4 months

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[ACTIVITY] Week 1

by Ramana Radhakrishnan

==Progress=== * Short week - 4 days only after the bank holiday monday. * Investigated PR48308 for a bit. * Caught up with emails after vacation. * Looked at fate an automatic tester for libav to validate my fixed to fp conversions . Need to finish that off. * 1 more bug with output_move_double ICE looked at briefly. Appears to be memory corruption but valgrinding didn't find the issue. Prioritizing PR48308 above this. === Plans === * Look at PR48308 a bit more seriously. * Finish my long standing patches. Absences. * Feb 6-10 : Linaro Connect Q1.12. * Feb 13- 18 : Holiday.

13 years, 4 months

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Microkernel based virtualisation

by Michael Hope

Amber noticed this on her Twitter feed: a L4 microkernel based para-virtualisation that runs on the A9: http://l4dev.org/ They're currently running the 11.12 LEB on a Versatile Express. The project overview: http://l4dev.org/codezero_overview talks about their 'hyperswitch' method to reduce the para-virtualisation overhead and reduce the number of changes to the Linux kernel. -- Michael

13 years, 4 months

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Release done, branch is open

by Michael Hope

The GCC release tested up just fine. The branch is now open for commits. The next release is Thursday the 9th of February. Note that this is in the middle of Connect. -- Michael

13 years, 4 months

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Linaro GCC 4.6 and 4.5 2012.01 released

by Michael Hope

The Linaro Toolchain Working Group is pleased to announce the 2012.01 release of Linaro GCC 4.6 and Linaro GCC 4.5. No changes were made in Linaro GDB this month and, as such, no release has been made. Linaro GCC 4.6 2012.01 is the eleventh release in the 4.6 series. Based off the latest GCC 4.6.2+svn182894 release, it contains a few bug fixes from over the Christmas break. Interesting changes include: * Updates to 4.6.2+svn182894 Fixes: * PR51301 ICE in vectorised widening multiplies * LP: #897583 Code generation bug with -O2 (-foptimize-sibling-calls) * LP: #736661 armel FTBFS due to compiler ICE Linaro GCC 4.5 2012.01 is the seventeenth release in the 4.5 series. Interesting changes include: * Updates to 4.5.3+svn182893 Fixes: * LP: #736661 armel FTBFS due to compiler ICE The source tarballs are available from: https://launchpad.net/gcc-linaro/+milestone/4.6-2012.01 https://launchpad.net/gcc-linaro/+milestone/4.5-2012.01 Downloads are available from the Linaro GCC page on Launchpad: https://launchpad.net/gcc-linaro More information on the features and issues are available from the release page: https://launchpad.net/gcc-linaro/4.6/4.6-2012.01 https://launchpad.net/gcc-linaro/4.5/4.5-2012.01 Mailing list: http://lists.linaro.org/mailman/listinfo/linaro-toolchain Bugs: https://bugs.launchpad.net/gcc-linaro/ Questions? https://ask.linaro.org/ Interested in commercial support? inquire at support(a)linaro.org -- Michael

13 years, 4 months

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Linaro QEMU 2012.01 released

by Peter Maydell

The Linaro Toolchain Working Group is pleased to announce the release of Linaro QEMU 2012.01. Linaro QEMU 2012.01 is the latest monthly release of qemu-linaro. Based off upstream (trunk) QEMU, it includes a number of ARM-focused bug fixes and enhancements. New in this month's release: - Several bug fixes which reinstate support for running on ARM hosts - Support for previously missing *xattr syscalls in usermode emulation - A (dummy) model of the L2x0/PL310 L2 cache contrnoller (thanks to Rob Herring and Mark Langsdorf of Calxeda) Known issues: - Graphics do not work for OMAP3 based models (beagle, overo) with 11.10 Linaro images. The source tarball is available at: https://launchpad.net/qemu-linaro/+milestone/2012.01 More information on Linaro QEMU is available at: https://launchpad.net/qemu-linaro

13 years, 4 months

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[PATCH 1/1] hw: Add IGEPv2 board support

by Javier Martinez Canillas

Add ISEE IGEPv2 board definition (an OMAP3730 based board). Signed-off-by: Javier Martinez Canillas <javier(a)dowhile0.org> --- Makefile.target | 2 +- hw/igep.c | 123 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 124 insertions(+), 1 deletions(-) create mode 100644 hw/igep.c diff --git a/Makefile.target b/Makefile.target index 409748f..2923dd7 100644 --- a/Makefile.target +++ b/Makefile.target @@ -349,7 +349,7 @@ obj-arm-y += omap1.o omap_lcdc.o omap_dma.o omap_clk.o omap_mmc.o omap_i2c.o \ obj-arm-y += omap2.o omap_dss.o soc_dma.o omap_gptimer.o omap_synctimer.o \ omap_gpmc.o omap_sdrc.o omap_spi.o omap_tap.o omap_l4.o obj-arm-y += omap3.o omap_usb.o omap3_boot.o omap3_mmc.o dsi.o -obj-arm-y += twl4030.o beagle.o overo.o +obj-arm-y += twl4030.o beagle.o overo.o igep.o obj-arm-y += omap_sx1.o palm.o tsc210x.o obj-arm-y += nseries.o blizzard.o onenand.o vga.o cbus.o tusb6010.o usb-musb.o obj-arm-y += mst_fpga.o mainstone.o diff --git a/hw/igep.c b/hw/igep.c new file mode 100644 index 0000000..5254ddf --- /dev/null +++ b/hw/igep.c @@ -0,0 +1,123 @@ +/* + * ISEE IGEPv2 board emulation. + * + * Copyright (c) 2012 ISEE 2007, SL + * Written by Javier Martinez Canillas (based on Gumstix Overo emulation code) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, see <http://www.gnu.org/licenses/>. + */ + +#include "qemu-common.h" +#include "sysemu.h" +#include "omap.h" +#include "arm-misc.h" +#include "boards.h" +#include "i2c.h" +#include "net.h" +#include "devices.h" +#include "flash.h" +#include "sysbus.h" +#include "blockdev.h" +#include "exec-memory.h" + +#define IGEP_NAND_CS 0 +#define IGEP_NET_CS 5 + +struct igep_s { + struct omap_mpu_state_s *cpu; + + DeviceState *nand; + void *twl4030; + DeviceState *eth; + DeviceState *ddc; +}; + +static void igep_init(ram_addr_t ram_size, + const char *boot_device, + const char *kernel_filename, + const char *kernel_cmdline, + const char *initrd_filename, + const char *cpu_model) +{ + MemoryRegion *sysmem = get_system_memory(); + struct igep_s *s = (struct igep_s *) g_malloc0(sizeof(*s)); + DriveInfo *dmtd = drive_get(IF_MTD, 0, 0); + DriveInfo *dsd = drive_get(IF_SD, 0, 0); + + if (ram_size > 1024 * 1024 * 1024) { + fprintf(stderr, "igep: maximum permitted RAM size 1024MB\n"); + exit(1); + } + + if (!dmtd && !dsd) { + hw_error("%s: SD or NAND image required", __func__); + } + s->cpu = omap3_mpu_init(sysmem, omap3630, ram_size, + NULL, NULL, serial_hds[0], NULL); + + s->nand = qdev_create(NULL, "onenand"); + qdev_prop_set_uint16(s->nand, "manufacturer_id", NAND_MFR_STMICRO); + qdev_prop_set_uint16(s->nand, "device_id", 0x40); + qdev_prop_set_uint16(s->nand, "version_id", 0x121); + qdev_prop_set_int32(s->nand, "shift", 1); + if (dmtd && dmtd->bdrv) { + qdev_prop_set_drive_nofail(s->nand, "drive", dmtd->bdrv); + } + qdev_init_nofail(s->nand); + omap_gpmc_attach(s->cpu->gpmc, IGEP_NAND_CS, + sysbus_mmio_get_region(sysbus_from_qdev(s->nand), 0)); + + if (dsd) { + omap3_mmc_attach(s->cpu->omap3_mmc[0], dsd->bdrv, 0, 0); + } + + /* FAB revs >= 2516: 4030 interrupt is GPIO 0 (earlier ones were 112) */ + s->twl4030 = twl4030_init(omap_i2c_bus(s->cpu->i2c, 0), + qdev_get_gpio_in(s->cpu->gpio, 0), + NULL, NULL); + + /* Wire up an I2C slave which returns EDID monitor information; + * newer Linux kernels won't turn on the display unless they + * detect a monitor over DDC. + */ + s->ddc = i2c_create_slave(omap_i2c_bus(s->cpu->i2c, 2), "i2c-ddc", 0x50); + + omap_lcd_panel_attach(s->cpu->dss); + + /* Strictly this should be a LAN9221 */ + if (nd_table[0].vlan) { + /* The ethernet chip hangs off the GPMC */ + NICInfo *nd = &nd_table[0]; + qemu_check_nic_model(nd, "lan9118"); + s->eth = qdev_create(NULL, "lan9118"); + qdev_set_nic_properties(s->eth, nd); + qdev_init_nofail(s->eth); + omap_gpmc_attach(s->cpu->gpmc, IGEP_NET_CS, + sysbus_mmio_get_region(sysbus_from_qdev(s->eth), 0)); + sysbus_connect_irq(sysbus_from_qdev(s->eth), 0, + qdev_get_gpio_in(s->cpu->gpio, 176)); + } +} + +QEMUMachine igep_machine = { + .name = "igep", + .desc = "ISEE IGEPv2 board (OMAP3730)", + .init = igep_init, +}; + +static void igep_machine_init(void) +{ + qemu_register_machine(&igep_machine); +} + +machine_init(igep_machine_init); -- 1.7.4.1

13 years, 4 months

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First proposals

by Michael Hope

Hi Åsa. Well, the first proposals have arrived. I've cc'ed this to linaro-toolchain so we have a record. First, visit: http://ex.seabright.co.nz/helpers/proposals and see there are new merge requests from Ulrich with new results. Next, login: http://ex.seabright.co.nz/helpers/login Your login is your Launchpad OpenID login "https://launchpad.net/~asa-sandahl" After logging in, go back to the proposals page. See that the fwprop-subreg merge request has a i686 and x86_64 result. The i686 one is fine so click 'Record' and follow your nose. The x86_64 is interesting - the fault might be real. Click 'Record'. Note the subject line has 'regressed' in it. Ulrich will have to investigate. The lp-879725 results look fine so record both of those. Scanning down the page shows that everything else is recorded so you're done! The tool is a bit slow so don't be surprised if an operation takes ~10 s. The tool is backed by a cache so you won't see the results for ~2 hours. -- Michael

13 years, 4 months

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Next week

by Andrew Stubbs

Hi Michael, I can't remember if I told you before, but I shall be away at the CodeSourcery (Ok, Mentor Graphics's ESD TOOLS) annual meeting most of next week. I ought to be back at work on Friday. In the meantime I shall be reading email, but not spending much time on Linaro work. I can probably still get the GCC release process done, but if you'd prefer Ramana did it this month then that's fine with me. Andrew

13 years, 4 months

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Spinning the build

by Michael Hope

Hi Andrew. The current tip looks good. Could you please run the release process, spin the build, and fire it into the auto builders? Ta, -- Michael

13 years, 4 months

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Backporting A15 changes

by Michael Hope

Hi there. Linaro is about what's next and, as part of this, we should backport any reasonable Cortex-A15 changes to our 4.6 branch. Richard and Matthew, could you let us know directly when new patches from ARM land upstream? We're already doing this but I thought I'd say it out loud. -- Michael

13 years, 4 months

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Building Linaro GCC from source

by Javier Martinez Canillas

Hello, I'm trying to build the Linaro GCC from source on an x86_64 Fedora 16 box. I'm using as a guide a wiki entry I found in linaro.org site [1] that explains how to build a native version of the compiler. But instead of a native version I want to be able to cross-compile ARM binaries for my target machine. This is what I tried: [javier@munra src]$ wget -c http://launchpadlibrarian.net/86993387/gcc-linaro-4.6-2011.12.tar.bz2 [javier@munra src]$ tar xaf gcc-linaro-4.6-2011.12.tar.bz2 [javier@munra src]$ mkdir build && cd build [javier@munra build]$ ../gcc-linaro-4.6-2011.12/configure --target=arm-linux --disable-bootstrap --enable-languages=c --prefix=/home/javier/tools [javier@munra build]$ make -j4 && make install But got this error: make[2]: Leaving directory `/home/javier/src/build/gcc' Checking multilib configuration for libgcc... mkdir -p -- arm-linux/libgcc Configuring in arm-linux/libgcc configure: creating cache ./config.cache checking for --enable-version-specific-runtime-libs... no checking for a BSD-compatible install... /usr/bin/install -c checking for gawk... gawk checking build system type... x86_64-unknown-linux-gnu checking host system type... arm-unknown-linux-gnu checking for arm-linux-ar... arm-linux-ar checking for arm-linux-lipo... arm-linux-lipo checking for arm-linux-nm... /home/javier/src/build/./gcc/nm checking for arm-linux-ranlib... arm-linux-ranlib checking for arm-linux-strip... arm-linux-strip checking whether ln -s works... yes checking for arm-linux-gcc... /home/javier/src/build/./gcc/xgcc -B/home/javier/src/build/./gcc/ -B/home/javier/tools/arm-linux/bin/ -B/home/javier/tools/arm-linux/lib/ -isystem /home/javier/tools/arm-linux/include -isystem /home/javier/tools/arm-linux/sys-include checking for suffix of object files... configure: error: in `/home/javier/src/build/arm-linux/libgcc': configure: error: cannot compute suffix of object files: cannot compile See `config.log' for more details. make[1]: *** [configure-target-libgcc] Error 1 make[1]: Leaving directory `/home/javier/src/build' make: *** [all] Error 2 Before trying to compile I've installed the libgmp, libmpfr and arm cross tool-chain [2] Fedora packages so I guess all gcc dependencies are met (binutils, glibc, etc). Could someone be so kind to point me out what am I doing wrong? I'm sending as an attachment the config.log generated file. Please let me know if you need any more information about my setup and environment. [1]: https://wiki.linaro.org/WorkingGroups/ToolChain/Using/GCCNative [2]: http://fedoraproject.org/wiki/Architectures/ARM/CrossToolchain Thanks a lot and best regards, Javier

13 years, 4 months

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A high level try at KVM for ARM

by Michael Hope

I've taken a stab at the medium term requirements for KVM on ARM: https://wiki.linaro.org/WorkingGroups/ToolChain/Specs/KVMEpic I haven't looked outside Linaro so apologies if this overlaps with other people's plans. Peter, this is high level and hopefully matches what's in your head. I want to use this to do a project plan, see if it can be done in 6-9 calendar months, and see if we need more people. Are there any implementation details that we should call out, similar to calling out virtio and UEFI? Rusty, this should tell you more about where we're going. Mounir, you, Peter, and I should turn this into a basic project plan. -- Michael

13 years, 4 months

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agenda for tomorrow's performance call.

by Ramana Radhakrishnan

Hi, Does anyone have anything they'd like to bring up in tomorrow's performance call. ? I don't have any topics other than following on action items from last time's call - which was comparing movw/ movt with constant pools . https://wiki.linaro.org/WorkingGroups/ToolChain/Meetings/2012-01-10 Please add to it as you deem fit. cheers Ramana

13 years, 4 months

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[ACTIVITY] 2nd - 6th January

by Andrew Stubbs

* Linaro Continued work on getting GCC to build on LAVA. I've ironed out a few more bugs from my test scripts, but it's slow going because a test runs takes a long time to run, and there are very few useful error messages when something goes wrong. Wrote, posted, and committed a patch to fix the "120" testsuite bug I encountered last month. Basically the GCC testsuite's "headmerge-1" testcase would have failed from now until September because a sloppy regex happening to match "120" in the toolchain version string's snapshot date. I've also backported it to upstream 4.6 and posted a merge request for Linaro 4.6. Continued running benchmarks for the generic tuning project. Continued looking at optimizing 64-bit shifts. No real progress this week though. * Other Monday: Public holiday. Tuesday: Vacation. Caught up on a mountain of email.

13 years, 4 months

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[ACTIVITY] Jan 04 - Jan 06

by Zhenqiang Chen

Summary: * Read armV7-A/R reference manual and analyze bugs. Details: * Read armV7-A/R reference manual and share the instruction set part with local team. * Analyze bugs: LP: #889985 "binaries: can't step out of helper functions" and LP: #889984 "binaries: should step across helper functions" Plan: * Ramp-up on gcc. Planed leave: * Jan 21 - 29: Chinese new year holiday. Best regards! -Zhenqiang

13 years, 4 months

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Jobs/tasks inside the group

by Michael Hope

Hi there. I want each administrative task inside our group to have an owner and a fill-in. I've started a list at: https://wiki.linaro.org/WorkingGroups/ToolChain/Jobs I took the chance to hand off some of my jobs as well so you might see your name somewhere new (but hopefully not surprising). I'll discuss this at tonight's meeting and in the 1-on-1s. Reply away if you'd like more detail or have a task to add. -- Michael

13 years, 4 months

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[ACTIVITY] report week 01

by Peter Maydell

[short week, three days] RAG: Red: Amber: Green: Current Milestones: || || Planned || Estimate || Actual || ||cp15-rework || 2012-01-06 || 2012-01-17 || || ||initial-a15-system-model || 2012-01-27 || 2012-01-27 || || ||qemu-kvm-getting-started || 2012-03-04?|| 2012-03-04?|| || (for blueprint definitions: https://wiki.linaro.org/PeterMaydell/QemuKVM) Historical Milestones: ||a15-usermode-support || 2011-11-10 || 2011-11-10 || 2011-10-27 || ||upstream-omap3-cleanup || 2011-11-10 || 2011-12-15 || 2011-12-12 || == other == * catchup on email, etc * patch review: patches for Calxeda's Highbank SoC model * put together pull requests for target-arm and arm-devs patchqueues * rebased qemu-linaro, added patches for things we want to fix in 2011.01, rolled a tarball, tested it and sent to Michael H for testing

13 years, 4 months

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Operations on intrinsic types

by Michael Hope

Hi Ramana. You were right about being able to do operations on intrinsic types. Instead of doing the admittedly made up: int16x4_t foo2(int16x4_t a, int16x4_t b) { int16x4_t ca = vdup_n_s16(0.2126*256); int16x4_t cb = vdup_n_s16(0.7152*256); return vadd_s16(vmul_s16(ca, a), vmul_s16(cb, b)); } you can do: int16x4_t foo3(int16x4_t a, int16x4_t b) { int16x4_t ca = vdup_n_s16(0.2126*256); int16x4_t cb = vdup_n_s16(0.7152*256); return ca*a + cb*b; } which is more readable and, as an added bonus, generates the multiply-and-accumulate that I missed when using intrinsics. Nice. -- Michael

13 years, 4 months

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[ACTIVITY] Jan 02 - Jan 05

by Ulrich Weigand

== GDB == * Ongoing discussion on remote support for "info proc" and core file generation. * Fixed various GDB 7.4 regressions on multiple platforms. == GCC == * Patch review week. * Started looking into current status of performance patches. Mit freundlichen Gruessen / Best Regards Ulrich Weigand -- Dr. Ulrich Weigand | Phone: +49-7031/16-3727 STSM, GNU compiler and toolchain for Linux on System z and Cell/B.E. IBM Deutschland Research & Development GmbH Vorsitzender des Aufsichtsrats: Martin Jetter | Geschäftsführung: Dirk Wittkopp Sitz der Gesellschaft: Böblingen | Registergericht: Amtsgericht Stuttgart, HRB 243294

13 years, 4 months

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Release notes for 2012.01

by Michael Hope

I liked Andrew's idea of sharing the release notes so I stole it for this month: https://wiki.linaro.org/MichaelHope/Sandbox/GCC2012.01ReleaseNotes Please add anything new and noteworthy that you've done to this draft. -- Michael

13 years, 4 months

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[ACTIVITY] weekly status

by Ken Werner

Hi, * Android * migrated my linaro android build environment * did a small change to the debuggerd patch (thanks Sylvain) * OpenEmbedded * the linaro binary toolchain uses multiarch paths while OE doesn't -> setup a workaround to make it look like a classic one * however, I think what I really want is to build the libc instead of using the one provided by the binary external toolchain * The core-image-minimal still doesn't boot properly because 'init' doesn't come properly Regards Ken

13 years, 4 months

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Patch drop: fwprop.c patch for neon-strided-load-extract

by Richard Sandiford

The remaining change for neon-strided-load-extract is to allow fwprop.c to propagate: (set (reg X) (subreg (reg Y) N)) even if no further simplifications are possible. I posted the original patch for comments here: http://article.gmane.org/gmane.comp.gcc.patches/246180/ and fixed the problem that H.J. spotted. I wasn't entirely happy with the benchmark results though, so it never became an RFA. Richard gcc/ * fwprop.c (propagate_rtx): Also set PR_CAN_APPEAR for subregs. Index: gcc/fwprop.c =================================================================== --- gcc/fwprop.c 2011-09-15 14:36:23.206143787 +0100 +++ gcc/fwprop.c 2011-09-15 14:36:40.995131564 +0100 @@ -664,7 +664,12 @@ propagate_rtx (rtx x, enum machine_mode return NULL_RTX; flags = 0; - if (REG_P (new_rtx) || CONSTANT_P (new_rtx)) + if (REG_P (new_rtx) + || CONSTANT_P (new_rtx) + || (GET_CODE (new_rtx) == SUBREG + && REG_P (SUBREG_REG (new_rtx)) + && (GET_MODE_SIZE (mode) + <= GET_MODE_SIZE (GET_MODE (SUBREG_REG (new_rtx)))))) flags |= PR_CAN_APPEAR; if (!for_each_rtx (&new_rtx, varying_mem_p, NULL)) flags |= PR_HANDLE_MEM;

13 years, 4 months

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[ACTIVITY] 2011-12-23 - and goodbye

by David Gilbert

== QEMU == * Wrote the context routines for Eglibc, including those that QEMU uses These pass all the context tests I could find, including QEMUs coroutine tests, and with them QEMU seems to boot OK. I've got a full eglibc test run going at the moment, but I don't think anything else uses them. I posted them with comments and a question to libc-ports; I'll try and chase follow ups. == String routines == * I posted the strchr and strlen routines to eglibc (libc-ports) * On strchr the question of whether it was worth using the longer version that's faster for longer strings (but slower for shorter strings) came up. I posted some stats, observations etc - and there is still a discussion on going about it. * For strlen, rth noted the same trick that I'd originally seen in newlib (and for which RichardS and Ramana had suggested) of a quicker end-of-string sequence using clz. I'd avoided this because I'd originally seen it in newlib and didn't want to copy it; but since 3 people have individually suggested it it would seem using. == Goodbye! == Thank you all for a fun & interesting year! I'm sure many of us will meet online again in the future. I'll try and follow my linaro.org address while it's still live to check for any replies to any patches/comments etc. Feel free to mail me at davidgil(a)uk.ibm.com (work) or dave(a)treblig.org (home); for Linaro people I've also added some more contact methods at: https://wiki.linaro.org/Internal/People/DaveGilbert/Contact Thanks again! Dave

13 years, 4 months

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Fwd: New question: problem in installing Linaro tools on Ask Linaro

by Andy Doan

anyone have a suggestion for this person? -------- Original Message -------- Subject: New question: problem in installing Linaro tools on Ask Linaro Date: Mon, 26 Dec 2011 21:31:57 -0800 (PST) From: Ask Linaro <dnsadmin(a)linaro.org> To: doanac <andy.doan(a)linaro.org> Ask Linaro - Q & A forum for Linaro developers <http://ask.linaro.org/> ------------------------------------------------------------------------ Hello doanac, chandrakala <http://ask.linaro.org/users/172/chandrakala> has just posted a new question on Ask Linaro, entitled problem in installing Linaro tools <http://ask.linaro.org/questions/456/problem-in-installing-linaro-tools> and tagged "/linaro <http://ask.linaro.org/tags/linaro/> installation <http://ask.linaro.org/tags/installation/>/". Here's what it says: Hi all, Iam new to linux and gnu tools. i have downloaded linaro gnu tools to install cortex-a8 on my ubuntu machine. iam able to successfully install gcc tools. But when i try to install arm tools it is throwing error. following are the commands used to install gnu tools and the error it is generated mckala@mckala:~/Desktop/gstreamer/gcc_objdir$ ../gcc-linaro-4.6-2011.12/gcc-linaro-4.6-2011.12/configure --target=arm-*-elf --disable-bootstrap --enable-languages=c,c++ --with-mode=thumb --with-arch=armv7-a --with-tune=cortex-a8 --with-fpu=neon --with-float=softfp --prefix=/home/mckala/Desktop/gstreamer/gcc_objdir --disable-werror --with-newlib mckala@mckala:~/Desktop/gstreamer/gcc_objdir$ make all-host mckala@mckala:~/Desktop/gstreamer/gcc_objdir$ make install-host with this gnu tools installation is completed and i did not get any error. when i used the following command to install cross compiler, it is giving error mckala@mckala:~/Desktop/gstreamer/gcc_objdir$ make The error is checking for suffix of object files... configure: error: in |/home/mckala/Desktop/gstreamer/gcc_objdir/arm-*-elf/libgcc': configure: error: cannot compute suffix of object files: cannot compile See|config.log' for more details. make[1]: *** [configure-target-libgcc] Error 1 config.log file is showing the following error. gcc_objdir/arm-/-elf/bin/ -B/home/mckala/Desktop/gstreamer/gcc_objdir/arm-/-elf/lib/ -isystem /home/mckala/Desktop/gstreamer/gcc_objdir/arm-/-elf/include -isystem /home/mckala/Desktop/gstreamer/gcc_objdir/arm-/-elf/sys-include -V >&5 xgcc: fatal error: no input files compilation terminated. Can any one please help on this. Thanks in advance. Don't forget to come over and cast your vote. Thanks, Ask Linaro P.S. You can always fine-tune which notifications you receive here <http://ask.linaro.org//users/16/doanac/subscriptions/>. ------------------------------------------------------------------------

13 years, 4 months

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Round-up and goodbye

by Richard Sandiford

I've posted all my WIP patches to this list over the last few days. Please treat them kindly. :-) I've also tried to update the relevant blueprints. I pinged the 4.5 and 4.6 backports for lp736661 on gcc-patches last week, then again this week, but there's obviously not likely to be much response at this time of year. I therefore went ahead with the Linaro merges of the branches rather than relying on them being committed to FSF branches in time for next month's Linaro release. I'll continue to ping though. If I've forgotten anything, or if you need more info, please don't hesitate to ask. I'll continue to monitor my Linaro email address as long as it remains active, although rdsandiford(a)googlemail.com is likely to be a better bet. With all that out of the way, I just wanted to say thank you to everyone for making this a really enjoyable project to work on. It feels like we managed to get through a fair number of new features, performance improvements and bug fixes this year. I hope Linaro will be around for a good few years yet and that it continues to go from strength to strength. Happy New Year, and all the best, Richard

13 years, 4 months

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Patch drop: sms-and-memory-dependencies

by Richard Sandiford

Here's the patch for sms-and-memory-dependencies. The idea is to bypass the sched-deps.c {output,read,anti,true}_dependence tests altogether -- which is easy to do thanks to the note_mem_dep hook -- and instead handle them in ddg.c. The ddg.c tests then use RTL loop iv analysis to try to get longer distances on the memory dependencies. (Note that other memory-related dependencies, such as those between volatile MEMs and other volatile instructions, are still handled by sched-deps.c.) Dependencies are now always created in pairs, so there's no need for get_sched_window to set an upper bound when processing incoming MEM_DEPs, or a lower bound when processing outgoing MEM_DEPs; we can rely on the partnering edge to do that instead. Richard gcc/ * Makefile.in (ddg.o): Depend on $(TREE_PASS_H). * ddg.h (REG_OR_MEM_DEP, REG_AND_MEM_DEP): Delete. (ddg_mem_ref): New structure. (ddg): Add loads and stores array. (create_ddg): Add a loop argument. (add_edges_to_ddg): Declare. (MAX_DDG_DISTANCE): New macro. * ddg.c: Include tree-pass.h. (mem_ref_p, mark_mem_use, mark_mem_use_1, mem_read_insn_p) (mark_mem_store, mem_write_insn_p, rtx_mem_access_p) (mem_access_insn_p): Delete. (create_mem_ref): New function. (graph_and_node): New structure. (record_loads, record_stores): New functions. (create_ddg_dep_from_intra_loop_link): Treat all dependencies as register dependencies. (walk_mems_2, walk_mems_1, insns_may_alias_p, add_intra_loop_mem_dep) (add_inter_loop_mem_dep): Delete. (build_intra_loop_deps): Ignore memory dependencies created by sched-deps.c. Don't handle memory dependencies here. (measure_mem_distance, add_memory_dep): New functions. (FOR_EACH_LATER_MEM_REF): New macro. (build_memory_deps): New function. (create_ddg): Take the loop as argument. Don't count loads and stores here. Call iv_analysis_loop_init. Pass all loads to record_loads and all stores to record_stores. Move edge creation to... (add_edges_to_ddg): ...this new function. Also call build_memory_deps. * modulo-sched.c (sat_mulpp, sat_addsp, sat_subsp): New functions. (schedule_reg_moves): Only handle register dependencies. (sms_schedule): Update call to create_ddg. Call iv_analysis_done after creating all ddgs. Only set issue_rate if there are ddgs. Only call setup_sched_infos and haifa_sched_init if there are ddgs. Call add_edges_to_ddg before processing each ddg. (get_sched_window): Use saturating arithmetic. Do not add an implicit upper bound for incoming MEM_DEPs, or an implicit lower bound for outgoing MEM_DEPs. Rework calculation of final window. (calculate_must_precede_follow, compute_split_row): Use saturating arithmetic. Index: gcc/Makefile.in =================================================================== --- gcc/Makefile.in 2011-12-30 13:13:45.077544981 +0000 +++ gcc/Makefile.in 2011-12-30 13:24:57.330195801 +0000 @@ -3316,7 +3316,7 @@ ddg.o : ddg.c $(DDG_H) $(CONFIG_H) $(SYS $(DIAGNOSTIC_CORE_H) $(RTL_H) $(TM_P_H) $(REGS_H) $(FUNCTION_H) \ $(FLAGS_H) insn-config.h $(INSN_ATTR_H) $(EXCEPT_H) $(RECOG_H) \ $(SCHED_INT_H) $(CFGLAYOUT_H) $(CFGLOOP_H) $(EXPR_H) $(BITMAP_H) \ - hard-reg-set.h sbitmap.h $(TM_H) + hard-reg-set.h sbitmap.h $(TM_H) $(TREE_PASS_H) modulo-sched.o : modulo-sched.c $(DDG_H) $(CONFIG_H) $(CONFIG_H) $(SYSTEM_H) \ coretypes.h $(TARGET_H) $(DIAGNOSTIC_CORE_H) $(RTL_H) $(TM_P_H) $(REGS_H) $(FUNCTION_H) \ $(FLAGS_H) insn-config.h $(INSN_ATTR_H) $(EXCEPT_H) $(RECOG_H) \ Index: gcc/ddg.h =================================================================== --- gcc/ddg.h 2011-12-30 13:13:45.077544981 +0000 +++ gcc/ddg.h 2011-12-30 13:24:57.324195831 +0000 @@ -35,8 +35,7 @@ typedef struct ddg_scc *ddg_scc_ptr; typedef struct ddg_all_sccs *ddg_all_sccs_ptr; typedef enum {TRUE_DEP, OUTPUT_DEP, ANTI_DEP} dep_type; -typedef enum {REG_OR_MEM_DEP, REG_DEP, MEM_DEP, REG_AND_MEM_DEP} - dep_data_type; +typedef enum {REG_DEP, MEM_DEP} dep_data_type; /* The following two macros enables direct access to the successors and predecessors bitmaps held in each ddg_node. Do not make changes to @@ -44,6 +43,28 @@ typedef enum {REG_OR_MEM_DEP, REG_DEP, M #define NODE_SUCCESSORS(x) ((x)->successors) #define NODE_PREDECESSORS(x) ((x)->predecessors) +/* A structure that represents a memory read or write in the DDG; + context decides which. */ +struct ddg_mem_ref { + /* The previous reference of the same type (read or write) in the DDG. */ + struct ddg_mem_ref *prev; + + /* The DDG node that contains the memory reference. */ + ddg_node_ptr node; + + /* The memory reference itself. */ + rtx mem; + + /* If the address is a known induction variable, its value in iteration + I is given by: + + BASE + OFFSET + I * STEP + + In other cases BASE is null. */ + rtx base; + HOST_WIDE_INT offset, step; +}; + /* A structure that represents a node in the DDG. */ struct ddg_node { @@ -117,6 +138,11 @@ struct ddg /* Number of instructions in the basic block. */ int num_nodes; + /* The loads and stores in the BB, from the end of the block to + the beginning. */ + struct ddg_mem_ref *loads; + struct ddg_mem_ref *stores; + /* Number of load/store instructions in the BB - statistics. */ int num_loads; int num_stores; @@ -167,7 +193,9 @@ struct ddg_all_sccs }; -ddg_ptr create_ddg (basic_block, int closing_branch_deps); +struct loop; +ddg_ptr create_ddg (struct loop *, basic_block, int closing_branch_deps); +void add_edges_to_ddg (ddg_ptr); void free_ddg (ddg_ptr); void print_ddg (FILE *, ddg_ptr); @@ -188,4 +216,7 @@ int longest_simple_path (ddg_ptr, int fr bool autoinc_var_is_used_p (rtx, rtx); +/* The maximum allowable distance on a DDG edge. */ +#define MAX_DDG_DISTANCE INT_MAX + #endif /* GCC_DDG_H */ Index: gcc/ddg.c =================================================================== --- gcc/ddg.c 2011-12-30 13:13:45.077544981 +0000 +++ gcc/ddg.c 2011-12-30 13:36:35.005498271 +0000 @@ -43,6 +43,7 @@ Software Foundation; either version 3, o #include "expr.h" #include "bitmap.h" #include "ddg.h" +#include "tree-pass.h" #ifdef INSN_SCHEDULING @@ -61,88 +62,102 @@ static ddg_edge_ptr create_ddg_edge (ddg dep_data_type, int, int); static void add_edge_to_ddg (ddg_ptr g, ddg_edge_ptr); -/* Auxiliary variable for mem_read_insn_p/mem_write_insn_p. */ -static bool mem_ref_p; +/* Create a memory reference record for MEM, which occurs in NODE. + PREV is the previous reference of the same type. */ +static struct ddg_mem_ref * +create_mem_ref (struct ddg_mem_ref *prev, ddg_node_ptr node, rtx mem) +{ + struct ddg_mem_ref *entry; + enum machine_mode pmode; + struct rtx_iv iv; + rtx x; + + entry = XCNEW (struct ddg_mem_ref); + entry->prev = prev; + entry->node = node; + entry->mem = mem; + + pmode = targetm.addr_space.address_mode (MEM_ADDR_SPACE (mem)); + if (iv_analyze_expr (node->insn, XEXP (mem, 0), pmode, &iv) + && iv.extend == UNKNOWN + && CONST_INT_P (iv.step)) + { + x = iv.base; + if (GET_CODE (x) == PLUS && CONST_INT_P (XEXP (x, 1))) + { + entry->base = XEXP (x, 0); + entry->offset = INTVAL (XEXP (x, 1)); + } + else + { + entry->base = x; + entry->offset = 0; + } + entry->step = INTVAL (iv.step); + } -/* Auxiliary function for mem_read_insn_p. */ -static int -mark_mem_use (rtx *x, void *data ATTRIBUTE_UNUSED) -{ - if (MEM_P (*x)) - mem_ref_p = true; - return 0; + if (dump_file) + { + fprintf (dump_file, "Found memory reference in insn %d:\n", + INSN_UID (node->insn)); + print_rtl (dump_file, mem); + if (entry->base) + { + fprintf (dump_file, "\nwith base:"); + print_rtl (dump_file, entry->base); + fprintf (dump_file, "\noffset " HOST_WIDE_INT_PRINT_DEC + " and step " HOST_WIDE_INT_PRINT_DEC "\n\n", + entry->offset, entry->step); + } + else + fprintf (dump_file, "\nwhich isn't a recognized iv\n\n"); + } + return entry; } -/* Auxiliary function for mem_read_insn_p. */ -static void -mark_mem_use_1 (rtx *x, void *data) -{ - for_each_rtx (x, mark_mem_use, data); -} +/* A structure for pairing a node and the graph to which it belongs. */ +struct graph_and_node { + ddg_ptr g; + ddg_node_ptr node; +}; -/* Returns nonzero if INSN reads from memory. */ -static bool -mem_read_insn_p (rtx insn) +/* A for_each_rtx callback. Record all loads in an instruction. + DATA points to a graph_and_node. */ +static int +record_loads_1 (rtx *loc, void *data) { - mem_ref_p = false; - note_uses (&PATTERN (insn), mark_mem_use_1, NULL); - return mem_ref_p; -} + struct graph_and_node *gn; -static void -mark_mem_store (rtx loc, const_rtx setter ATTRIBUTE_UNUSED, void *data ATTRIBUTE_UNUSED) -{ - if (MEM_P (loc)) - mem_ref_p = true; + if (MEM_P (*loc)) + { + gn = (struct graph_and_node *) data; + gn->g->loads = create_mem_ref (gn->g->loads, gn->node, *loc); + gn->g->num_loads++; + } + return 0; } -/* Returns nonzero if INSN writes to memory. */ -static bool -mem_write_insn_p (rtx insn) +/* A note_uses callback. Record all loads in an instruction. + DATA points to a graph_and_node. */ +static void +record_loads (rtx *loc, void *data) { - mem_ref_p = false; - note_stores (PATTERN (insn), mark_mem_store, NULL); - return mem_ref_p; + for_each_rtx (loc, record_loads_1, data); } -/* Returns nonzero if X has access to memory. */ -static bool -rtx_mem_access_p (rtx x) +/* A note_stores callback. Record all stores in an instruction. + DATA points to a graph_and_node. */ +static void +record_stores (rtx x, const_rtx setter ATTRIBUTE_UNUSED, void *data) { - int i, j; - const char *fmt; - enum rtx_code code; - - if (x == 0) - return false; + struct graph_and_node *gn; if (MEM_P (x)) - return true; - - code = GET_CODE (x); - fmt = GET_RTX_FORMAT (code); - for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--) { - if (fmt[i] == 'e') - { - if (rtx_mem_access_p (XEXP (x, i))) - return true; - } - else if (fmt[i] == 'E') - for (j = 0; j < XVECLEN (x, i); j++) - { - if (rtx_mem_access_p (XVECEXP (x, i, j))) - return true; - } + gn = (struct graph_and_node *) data; + gn->g->stores = create_mem_ref (gn->g->stores, gn->node, x); + gn->g->num_stores++; } - return false; -} - -/* Returns nonzero if INSN reads to or writes from memory. */ -static bool -mem_access_insn_p (rtx insn) -{ - return rtx_mem_access_p (PATTERN (insn)); } /* Return true if DEF_INSN contains address being auto-inc or auto-dec @@ -175,9 +190,6 @@ create_ddg_dep_from_intra_loop_link (ddg ddg_edge_ptr e; int latency, distance = 0; dep_type t = TRUE_DEP; - dep_data_type dt = (mem_access_insn_p (src_node->insn) - && mem_access_insn_p (dest_node->insn) ? MEM_DEP - : REG_DEP); gcc_assert (src_node->cuid < dest_node->cuid); gcc_assert (link); @@ -201,7 +213,7 @@ create_ddg_dep_from_intra_loop_link (ddg TODO: support the removal of all anti-deps edges, i.e. including those whose register has multiple defs in the loop. */ if (flag_modulo_sched_allow_regmoves - && (t == ANTI_DEP && dt == REG_DEP) + && t == ANTI_DEP && !autoinc_var_is_used_p (dest_node->insn, src_node->insn)) { rtx set; @@ -224,7 +236,7 @@ create_ddg_dep_from_intra_loop_link (ddg } latency = dep_cost (link); - e = create_ddg_edge (src_node, dest_node, t, dt, latency, distance); + e = create_ddg_edge (src_node, dest_node, t, REG_DEP, latency, distance); add_edge_to_ddg (g, e); } @@ -380,107 +392,6 @@ build_inter_loop_deps (ddg_ptr g) } } - -static int -walk_mems_2 (rtx *x, rtx mem) -{ - if (MEM_P (*x)) - { - if (may_alias_p (*x, mem)) - return 1; - - return -1; - } - return 0; -} - -static int -walk_mems_1 (rtx *x, rtx *pat) -{ - if (MEM_P (*x)) - { - /* Visit all MEMs in *PAT and check indepedence. */ - if (for_each_rtx (pat, (rtx_function) walk_mems_2, *x)) - /* Indicate that dependence was determined and stop traversal. */ - return 1; - - return -1; - } - return 0; -} - -/* Return 1 if two specified instructions have mem expr with conflict alias sets*/ -static int -insns_may_alias_p (rtx insn1, rtx insn2) -{ - /* For each pair of MEMs in INSN1 and INSN2 check their independence. */ - return for_each_rtx (&PATTERN (insn1), (rtx_function) walk_mems_1, - &PATTERN (insn2)); -} - -/* Given two nodes, analyze their RTL insns and add intra-loop mem deps - to ddg G. */ -static void -add_intra_loop_mem_dep (ddg_ptr g, ddg_node_ptr from, ddg_node_ptr to) -{ - - if ((from->cuid == to->cuid) - || !insns_may_alias_p (from->insn, to->insn)) - /* Do not create edge if memory references have disjoint alias sets - or 'to' and 'from' are the same instruction. */ - return; - - if (mem_write_insn_p (from->insn)) - { - if (mem_read_insn_p (to->insn)) - create_ddg_dep_no_link (g, from, to, - DEBUG_INSN_P (to->insn) - ? ANTI_DEP : TRUE_DEP, MEM_DEP, 0); - else - create_ddg_dep_no_link (g, from, to, - DEBUG_INSN_P (to->insn) - ? ANTI_DEP : OUTPUT_DEP, MEM_DEP, 0); - } - else if (!mem_read_insn_p (to->insn)) - create_ddg_dep_no_link (g, from, to, ANTI_DEP, MEM_DEP, 0); -} - -/* Given two nodes, analyze their RTL insns and add inter-loop mem deps - to ddg G. */ -static void -add_inter_loop_mem_dep (ddg_ptr g, ddg_node_ptr from, ddg_node_ptr to) -{ - if (!insns_may_alias_p (from->insn, to->insn)) - /* Do not create edge if memory references have disjoint alias sets. */ - return; - - if (mem_write_insn_p (from->insn)) - { - if (mem_read_insn_p (to->insn)) - create_ddg_dep_no_link (g, from, to, - DEBUG_INSN_P (to->insn) - ? ANTI_DEP : TRUE_DEP, MEM_DEP, 1); - else if (from->cuid != to->cuid) - create_ddg_dep_no_link (g, from, to, - DEBUG_INSN_P (to->insn) - ? ANTI_DEP : OUTPUT_DEP, MEM_DEP, 1); - } - else - { - if (mem_read_insn_p (to->insn)) - return; - else if (from->cuid != to->cuid) - { - create_ddg_dep_no_link (g, from, to, ANTI_DEP, MEM_DEP, 1); - if (DEBUG_INSN_P (from->insn) || DEBUG_INSN_P (to->insn)) - create_ddg_dep_no_link (g, to, from, ANTI_DEP, MEM_DEP, 1); - else - create_ddg_dep_no_link (g, to, from, TRUE_DEP, MEM_DEP, 1); - } - } - -} - /* Perform intra-block Data Dependency analysis and connect the nodes in the DDG. We assume the loop has a single basic block. */ static void @@ -493,6 +404,9 @@ build_intra_loop_deps (ddg_ptr g) /* Build the dependence information, using the sched_analyze function. */ init_deps_global (); + /* Ignore the usual dependencies between two MEM rtxes. We still rely + on sched_analyze to handle memory barriers and the like. */ + sched_deps_info->note_mem_dep = 0; init_deps (&tmp_deps, false); /* Do the intra-block data dependence analysis for the given block. */ @@ -519,37 +433,6 @@ build_intra_loop_deps (ddg_ptr g) create_ddg_dep_from_intra_loop_link (g, src_node, dest_node, dep); } - - /* If this insn modifies memory, add an edge to all insns that access - memory. */ - if (mem_access_insn_p (dest_node->insn)) - { - int j; - - for (j = 0; j <= i; j++) - { - ddg_node_ptr j_node = &g->nodes[j]; - if (DEBUG_INSN_P (j_node->insn)) - continue; - if (mem_access_insn_p (j_node->insn)) - { - /* Don't bother calculating inter-loop dep if an intra-loop dep - already exists. */ - if (! TEST_BIT (dest_node->successors, j)) - add_inter_loop_mem_dep (g, dest_node, j_node); - /* If -fmodulo-sched-allow-regmoves - is set certain anti-dep edges are not created. - It might be that these anti-dep edges are on the - path from one memory instruction to another such that - removing these edges could cause a violation of the - memory dependencies. Thus we add intra edges between - every two memory instructions in this case. */ - if (flag_modulo_sched_allow_regmoves - && !TEST_BIT (dest_node->predecessors, j)) - add_intra_loop_mem_dep (g, j_node, dest_node); - } - } - } } /* Free the INSN_LISTs. */ @@ -560,13 +443,187 @@ build_intra_loop_deps (ddg_ptr g) sched_free_deps (head, tail, false); } +/* Given a "source" memory reference from iteration 0 and a "target" + memory reference from iteration BASE_DISTANCE, return the first + N >= BASE_DISTANCE such that the source reference in iteration 0 + overlaps the target reference in iteration N. + + FROM_OFFSET is the offset of the source reference from an unspecified + base, while TO_OFFSET is the offset of the target reference from that + same base. FROM_SIZE and TO_SIZE are the sizes of the two references + in bytes. + + PMODE is the mode of both addresses, and STEP is the amount that + will be added to each address by one loop iteration. */ +static int +measure_mem_distance (enum machine_mode pmode, + unsigned HOST_WIDE_INT from_offset, + unsigned HOST_WIDE_INT from_size, + unsigned HOST_WIDE_INT to_offset, + unsigned HOST_WIDE_INT to_size, + unsigned HOST_WIDE_INT base_distance, + HOST_WIDE_INT step) +{ + unsigned HOST_WIDE_INT extra, from2to, to2from; + + from2to = (to_offset - from_offset) & GET_MODE_MASK (pmode); + to2from = (from_offset - to_offset) & GET_MODE_MASK (pmode); + if (from2to < from_size || to2from < to_size) + /* The source reference in iteration 0 overlaps the target reference + in iteration BASE_DISTANCE. The check is written this way to cope + with cases where offset + size overflows. */ + return base_distance; + + /* N > BASE_DISTANCE. To cope more easily with cases where the round-up + divisions: + + (to2from - (to_size - 1) + (step - 1)) / step + (from2to - (from_size - 1) + (step - 1)) / step + + would overflow, bump BASE_DISTANCE and subtract STEP from each + dividend to compensate. */ + base_distance++; + if (step > 0) + extra = (to2from - to_size) / (unsigned HOST_WIDE_INT) step; + else + extra = (from2to - from_size) / (unsigned HOST_WIDE_INT) -step; + if (extra > MAX_DDG_DISTANCE || base_distance + extra > MAX_DDG_DISTANCE) + return MAX_DDG_DISTANCE; + return base_distance + extra; +} + +/* If FROM and TO might alias, record memory dependencies: + + FROM--(FORWARD_TYPE)-->TO + and TO--(BACKWARD_TYPE)-->FROM + + FROM comes before TO in the original loop, and both belong to G. + FORWARD_DISTANCE is the minimum distance of the FROM--->TO dependence. */ +static void +add_memory_dep (ddg_ptr g, struct ddg_mem_ref *from, + struct ddg_mem_ref *to, dep_type forward_type, + dep_type backward_type, int forward_distance) +{ + HOST_WIDE_INT step; + unsigned HOST_WIDE_INT from_size, to_size, to_disp, abs_step, future_offset; + enum machine_mode pmode; + int backward_distance; + + gcc_checking_assert (from->node->cuid < to->node->cuid); + + if (!may_alias_p (from->mem, to->mem)) + return; + + /* In the worst case, the TO---->FROM edge has a distance of 1. */ + backward_distance = 1; + + /* See if we can get more accurate distances. Look for cases where + the addresses of FROM and TO are ivs with the same base and step. */ + if (from->base + && to->base + && from->step + && from->step == to->step + && !MEM_VOLATILE_P (from->mem) + && !MEM_VOLATILE_P (to->mem) + && MEM_SIZE_KNOWN_P (from->mem) + && MEM_SIZE_KNOWN_P (to->mem) + && MEM_ADDR_SPACE (from->mem) == MEM_ADDR_SPACE (to->mem) + && rtx_equal_p (from->base, to->base)) + { + step = to->step; + abs_step = (step < 0 ? -step : step); + from_size = MEM_SIZE (from->mem); + to_size = MEM_SIZE (to->mem); + + /* If the step is a power of two, or the negative of a power of two, + see whether we can prove that the references never overlap. */ + if (abs_step == (abs_step & -abs_step)) + { + to_disp = (to->offset - from->offset) % abs_step; + if (from_size <= to_disp && to_disp + to_size <= abs_step) + return; + } + + pmode = targetm.addr_space.address_mode (MEM_ADDR_SPACE (to->mem)); + future_offset = to->offset + forward_distance * step; + forward_distance = measure_mem_distance (pmode, + from->offset, from_size, + future_offset, to_size, + forward_distance, step); + future_offset = from->offset + backward_distance * step; + backward_distance = measure_mem_distance (pmode, + to->offset, to_size, + future_offset, from_size, + backward_distance, step); + } + + if (DEBUG_INSN_P (from->node->insn) || DEBUG_INSN_P (to->node->insn)) + { + forward_type = ANTI_DEP; + backward_type = ANTI_DEP; + } + create_ddg_dep_no_link (g, from->node, to->node, forward_type, MEM_DEP, + forward_distance); + create_ddg_dep_no_link (g, to->node, from->node, backward_type, MEM_DEP, + backward_distance); +} + +/* Make REF2 iterate over all entries in ddg_mem_ref list LIST + that come later than ddg_mem_ref REF1. */ +#define FOR_EACH_LATER_MEM_REF(REF2, REF1, LIST) \ + for (REF2 = (LIST); \ + REF2 && REF2->node->cuid > REF1->node->cuid; \ + REF2 = REF2->prev) + +/* Check for dependencies between pairs of memory rtxes. */ +static void +build_memory_deps (ddg_ptr g) +{ + struct ddg_mem_ref *ref1, *ref2; + int distance; + + for (ref1 = g->loads; ref1; ref1 = ref1->prev) + { + /* LOAD--->LOAD. */ + if (MEM_VOLATILE_P (ref1->mem)) + FOR_EACH_LATER_MEM_REF (ref2, ref1, g->loads) + if (MEM_VOLATILE_P (ref2->mem)) + add_memory_dep (g, ref1, ref2, ANTI_DEP, ANTI_DEP, 0); + + /* LOAD--->STORE. */ + FOR_EACH_LATER_MEM_REF (ref2, ref1, g->stores) + { + distance = anti_dependence (ref1->mem, ref2->mem) ? 0 : 1; + add_memory_dep (g, ref1, ref2, ANTI_DEP, TRUE_DEP, distance); + } + } + + for (ref1 = g->stores; ref1; ref1 = ref1->prev) + { + /* STORE--->LOAD. */ + FOR_EACH_LATER_MEM_REF (ref2, ref1, g->loads) + { + distance = true_dependence (ref1->mem, VOIDmode, + ref2->mem, rtx_varies_p) ? 0 : 1; + add_memory_dep (g, ref1, ref2, TRUE_DEP, ANTI_DEP, distance); + } + + /* STORE--->STORE. */ + FOR_EACH_LATER_MEM_REF (ref2, ref1, g->stores) + { + distance = output_dependence (ref1->mem, ref2->mem) ? 0 : 1; + add_memory_dep (g, ref1, ref2, OUTPUT_DEP, OUTPUT_DEP, distance); + } + } +} -/* Given a basic block, create its DDG and return a pointer to a variable - of ddg type that represents it. +/* Given a basic block, create the nodes of its DDG and return a pointer + to a variable of ddg type that represents it. Initialize the ddg structure fields to the appropriate values. */ ddg_ptr -create_ddg (basic_block bb, int closing_branch_deps) +create_ddg (struct loop *loop, basic_block bb, int closing_branch_deps) { + struct graph_and_node gn; ddg_ptr g; rtx insn, first_note; int i; @@ -586,13 +643,6 @@ create_ddg (basic_block bb, int closing_ if (DEBUG_INSN_P (insn)) g->num_debug++; - else - { - if (mem_read_insn_p (insn)) - g->num_loads++; - if (mem_write_insn_p (insn)) - g->num_stores++; - } num_nodes++; } @@ -603,6 +653,8 @@ create_ddg (basic_block bb, int closing_ return NULL; } + iv_analysis_loop_init (loop); + /* Allocate the nodes array, and initialize the nodes. */ g->num_nodes = num_nodes; g->nodes = (ddg_node_ptr) xcalloc (num_nodes, sizeof (struct ddg_node)); @@ -637,18 +689,31 @@ create_ddg (basic_block bb, int closing_ g->nodes[i].predecessors = sbitmap_alloc (num_nodes); sbitmap_zero (g->nodes[i].predecessors); g->nodes[i].first_note = (first_note ? first_note : insn); - g->nodes[i++].insn = insn; + g->nodes[i].insn = insn; first_note = NULL_RTX; + + gn.g = g; + gn.node = &g->nodes[i]; + note_uses (&PATTERN (insn), record_loads, &gn); + note_stores (PATTERN (insn), record_stores, &gn); + + i++; } /* We must have found a branch in DDG. */ gcc_assert (g->closing_branch); + return g; +} +/* Add the edges to a DDG that was previously created by create_ddg. + This function relies on scheduler dependencies. */ - /* Build the data dependency graph. */ +void +add_edges_to_ddg (ddg_ptr g) +{ build_intra_loop_deps (g); build_inter_loop_deps (g); - return g; + build_memory_deps (g); } /* Free all the memory allocated for the DDG. */ Index: gcc/modulo-sched.c =================================================================== --- gcc/modulo-sched.c 2011-12-30 13:13:45.077544981 +0000 +++ gcc/modulo-sched.c 2011-12-30 13:24:57.327195816 +0000 @@ -345,6 +345,38 @@ ps_num_consecutive_stages (partial_sched return ps_reg_move (ps, id)->num_consecutive_stages; } +/* Perform a saturating multiplication of nonnegative values A and B. */ + +static inline int +sat_mulpp (unsigned int a, unsigned int b) +{ + if ((unsigned int) INT_MAX / b <= a) + return INT_MAX; + else + return a * b; +} + +/* Perform a saturating addition of signed value A and nonnegative value B. */ + +static inline int +sat_addsp (int a, int b) +{ + if (INT_MAX - b <= a) + return INT_MAX; + return a + b; +} + +/* Perform a saturating subtraction of signed value A and nonnegative + value B. */ + +static inline int +sat_subsp (int a, int b) +{ + if (INT_MIN + b >= a) + return INT_MIN; + return a - b; +} + /* Given HEAD and TAIL which are the first and last insns in a loop; return the register which controls the loop. Return zero if it has more than one occurrence in the loop besides the control part or the @@ -709,7 +741,9 @@ schedule_reg_moves (partial_schedule_ptr ranges started at u (excluding self-loops). */ distances[0] = distances[1] = false; for (e = u->out; e; e = e->next_out) - if (e->type == TRUE_DEP && e->dest != e->src) + if (e->data_type == REG_DEP + && e->type == TRUE_DEP + && e->dest != e->src) { int nreg_moves4e = (SCHED_TIME (e->dest->cuid) - SCHED_TIME (e->src->cuid)) / ii; @@ -781,7 +815,9 @@ schedule_reg_moves (partial_schedule_ptr copy of this register, depending on the time the use is scheduled. Record which uses require which move results. */ for (e = u->out; e; e = e->next_out) - if (e->type == TRUE_DEP && e->dest != e->src) + if (e->data_type == REG_DEP + && e->type == TRUE_DEP + && e->dest != e->src) { int dest_copy = (SCHED_TIME (e->dest->cuid) - SCHED_TIME (e->src->cuid)) / ii; @@ -1355,6 +1391,7 @@ sms_schedule (void) basic_block condition_bb = NULL; edge latch_edge; gcov_type trip_count = 0; + int num_ddgs; loop_optimizer_init (LOOPS_HAVE_PREHEADERS | LOOPS_HAVE_RECORDED_EXITS); @@ -1364,34 +1401,19 @@ sms_schedule (void) return; /* There are no loops to schedule. */ } - /* Initialize issue_rate. */ - if (targetm.sched.issue_rate) - { - int temp = reload_completed; - - reload_completed = 1; - issue_rate = targetm.sched.issue_rate (); - reload_completed = temp; - } - else - issue_rate = 1; - - /* Initialize the scheduler. */ - setup_sched_infos (); - haifa_sched_init (); - /* Allocate memory to hold the DDG array one entry for each loop. We use loop->num as index into this array. */ g_arr = XCNEWVEC (ddg_ptr, number_of_loops ()); if (dump_file) - { - fprintf (dump_file, "\n\nSMS analysis phase\n"); - fprintf (dump_file, "===================\n\n"); - } + { + fprintf (dump_file, "\n\nSMS loop discovery phase\n"); + fprintf (dump_file, "========================\n\n"); + } /* Build DDGs for all the relevant loops and hold them in G_ARR indexed by the loop index. */ + num_ddgs = 0; FOR_EACH_LOOP (li, loop, 0) { rtx head, tail; @@ -1512,7 +1534,7 @@ sms_schedule (void) instructions. The branch is rotated to be in row ii-1 at the end of the scheduling procedure to make sure it's the last instruction in the iteration. */ - if (! (g = create_ddg (bb, 1))) + if (! (g = create_ddg (loop, bb, 1))) { if (dump_file) fprintf (dump_file, "SMS create_ddg failed\n"); @@ -1523,12 +1545,38 @@ sms_schedule (void) if (dump_file) fprintf (dump_file, "...OK\n"); + num_ddgs++; + } + iv_analysis_done (); + + if (num_ddgs == 0) + { + if (dump_file) + fprintf (dump_file, "No suitable loops\n"); + goto done; } + + /* Initialize issue_rate. */ + if (targetm.sched.issue_rate) + { + int temp = reload_completed; + + reload_completed = 1; + issue_rate = targetm.sched.issue_rate (); + reload_completed = temp; + } + else + issue_rate = 1; + + /* Initialize the scheduler. */ + setup_sched_infos (); + haifa_sched_init (); + if (dump_file) - { - fprintf (dump_file, "\nSMS transformation phase\n"); - fprintf (dump_file, "=========================\n\n"); - } + { + fprintf (dump_file, "\nSMS transformation phase\n"); + fprintf (dump_file, "=========================\n\n"); + } /* We don't want to perform SMS on new loops - created by versioning. */ FOR_EACH_LOOP (li, loop, 0) @@ -1542,6 +1590,8 @@ sms_schedule (void) if (! (g = g_arr[loop->num])) continue; + add_edges_to_ddg (g); + if (dump_file) { rtx insn = BB_END (loop->header); @@ -1754,10 +1804,12 @@ sms_schedule (void) free_ddg (g); } - free (g_arr); - /* Release scheduler data, needed until now because of DFA. */ haifa_sched_finish (); + + done: + free (g_arr); + loop_optimizer_finalize (); } @@ -1844,6 +1896,7 @@ #define DFA_HISTORY SMS_DFA_HISTORY /* A threshold for the number of repeated unsuccessful attempts to insert an empty row, before we flush the partial schedule and start over. */ #define MAX_SPLIT_NUM 10 + /* Given the partial schedule PS, this function calculates and returns the cycles in which we can schedule the node with the given index I. NOTE: Here we do the backtracking in SMS, in some special cases. We have @@ -1896,7 +1949,7 @@ get_sched_window (partial_schedule_ptr p fprintf (dump_file, "=========== =========== =========== ===========" " =====\n"); } - /* Calculate early_start and limit end. Both bounds are inclusive. */ + /* Calculate early_start and limit start. Both bounds are inclusive. */ if (psp_not_empty) for (e = u_node->in; e != 0; e = e->next_in) { @@ -1905,26 +1958,36 @@ get_sched_window (partial_schedule_ptr p if (TEST_BIT (sched_nodes, v)) { int p_st = SCHED_TIME (v); - int earliest = p_st + e->latency - (e->distance * ii); - int latest = (e->data_type == MEM_DEP ? p_st + ii - 1 : INT_MAX); + int earliest = sat_subsp (sat_addsp (p_st, e->latency), + sat_mulpp (e->distance, ii)); + if (e->data_type == MEM_DEP) + { + start = MAX (start, earliest); + if (dump_file) + fprintf (dump_file, "%11d %11s %11s %11s", + earliest, "", "", ""); + } + else + { + early_start = MAX (early_start, earliest); + if (dump_file) + fprintf (dump_file, "%11s %11d %11s %11s", + "", earliest, "", ""); + } if (dump_file) { - fprintf (dump_file, "%11s %11d %11s %11d %5d", - "", earliest, "", latest, p_st); + fprintf (dump_file, " %5d", p_st); print_ddg_edge (dump_file, e); fprintf (dump_file, "\n"); } - early_start = MAX (early_start, earliest); - end = MIN (end, latest); - if (e->type == TRUE_DEP && e->data_type == REG_DEP) count_preds++; } } - /* Calculate late_start and limit start. Both bounds are inclusive. */ + /* Calculate late_start and limit end. Both bounds are inclusive. */ if (pss_not_empty) for (e = u_node->out; e != 0; e = e->next_out) { @@ -1933,20 +1996,30 @@ get_sched_window (partial_schedule_ptr p if (TEST_BIT (sched_nodes, v)) { int s_st = SCHED_TIME (v); - int earliest = (e->data_type == MEM_DEP ? s_st - ii + 1 : INT_MIN); - int latest = s_st - e->latency + (e->distance * ii); + int latest = sat_addsp (sat_subsp (s_st, e->latency), + sat_mulpp (e->distance, ii)); + if (e->data_type == MEM_DEP) + { + end = MIN (end, latest); + if (dump_file) + fprintf (dump_file, "%11s %11s %11s %11d", + "", "", "", latest); + } + else + { + late_start = MIN (late_start, latest); + if (dump_file) + fprintf (dump_file, "%11s %11s %11d %11s", + "", "", latest, ""); + } if (dump_file) { - fprintf (dump_file, "%11d %11s %11d %11s %5d", - earliest, "", latest, "", s_st); + fprintf (dump_file, " %5d", s_st); print_ddg_edge (dump_file, e); fprintf (dump_file, "\n"); } - start = MAX (start, earliest); - late_start = MIN (late_start, latest); - if (e->type == TRUE_DEP && e->data_type == REG_DEP) count_succs++; } @@ -1963,14 +2036,22 @@ get_sched_window (partial_schedule_ptr p /* Get a target scheduling window no bigger than ii. */ if (early_start == INT_MIN && late_start == INT_MAX) - early_start = NODE_ASAP (u_node); - else if (early_start == INT_MIN) - early_start = late_start - (ii - 1); - late_start = MIN (late_start, early_start + (ii - 1)); - - /* Apply memory dependence limits. */ - start = MAX (start, early_start); - end = MIN (end, late_start); + { + /* The default window (as given in the paper) is based on + the node's ASAP value, but shift or shrink it as necessary + in order to honor memory dependencies. */ + early_start = MIN (NODE_ASAP (u_node), end - (ii - 1)); + start = MAX (early_start, start); + } + else + { + end = MIN (end, late_start); + if (early_start == INT_MIN) + start = MAX (start, end - (ii - 1)); + else + start = MAX (start, early_start); + } + end = MIN (end, start + (ii - 1)); if (dump_file && (psp_not_empty || pss_not_empty)) fprintf (dump_file, "%11s %11d %11d %11s %5s final window\n", @@ -2060,8 +2141,8 @@ calculate_must_precede_follow (ddg_node_ SCHED_TIME (e->src) - (e->distance * ii) == first_cycle_in_window */ for (e = u_node->in; e != 0; e = e->next_in) if (TEST_BIT (sched_nodes, e->src->cuid) - && ((SCHED_TIME (e->src->cuid) - (e->distance * ii)) == - first_cycle_in_window)) + && (sat_subsp (SCHED_TIME (e->src->cuid), sat_mulpp (e->distance, ii)) + == first_cycle_in_window)) { if (dump_file) fprintf (dump_file, "%d ", e->src->cuid); @@ -2371,7 +2452,8 @@ compute_split_row (sbitmap sched_nodes, int v = e->src->cuid; if (TEST_BIT (sched_nodes, v) - && (low == SCHED_TIME (v) + e->latency - (e->distance * ii))) + && low == sat_subsp (sat_addsp (SCHED_TIME (v), e->latency), + sat_mulpp (e->distance, ii))) if (SCHED_TIME (v) > lower) { crit_pred = v;

13 years, 4 months

1
0
0 0

Update to lp:~rsandifo/+junk/loop-microbenchmarks

by Richard Sandiford

About three months ago, 4.7 stopped being able to optimise things like: int *__restrict x = ...; The (libav) loop microbenchmarks that I'd written used this construct a lot, as an easy way of automatically generating a whole function from a loop kernel. I spent a while testing 4.7 with the restrict patch reverted, while I caught up with my post-holiday email backlog and saw whether the effect on this code was deliberate. I eventually realised it was, so implemented a change that Ira had suggested: splitting out a peak_loop_1 that takes all the restrict pointers as arguments. I just realised that I never pushed that change back up to bzr, so I've done it now. Probably a write-only change, since I doubt anyone's going to be using the benchmark again, but just in case :-) Richard

13 years, 4 months

1
0
0 0

Patch drop: auto-inc-dec.c rewrite

by Richard Sandiford

This is my current 4.7 auto-inc-dec.c patch. I submitted an RFC in July: http://article.gmane.org/gmane.comp.gcc.patches/241779/ and updated the patch in line with the feedback I got. Steven Bosscher sent some very useful comments in private email, so the update deals with those as well as Bernd's public ones. If we do go ahead with this rewrite, it depends on the A9 pipeline description changes. I submitted some A8 and A9 changes here: http://article.gmane.org/gmane.comp.gcc.patches/244238/ http://article.gmane.org/gmane.comp.gcc.patches/244242/ but because I later noticed that the A9 didn't behave quite as I thought, I decided not to apply them. Ramana asked around internally about what the A9 actually does (thanks) and had some ideas. The patch also relies on the MEM rtx_costs patch that I just posted: http://lists.linaro.org/pipermail/linaro-toolchain/2011-December/001944.html Richard gcc/ * Makefile.in (auto-inc-dec.o): Depends on $(OPTABS_H) and addresses.h. * auto-inc-dec.c: Rewrite. Index: gcc/Makefile.in =================================================================== --- gcc/Makefile.in 2011-12-07 11:43:29.549238252 +0000 +++ gcc/Makefile.in 2011-12-29 09:24:51.066303201 +0000 @@ -3145,7 +3145,8 @@ alloc-pool.o : alloc-pool.c $(CONFIG_H) auto-inc-dec.o : auto-inc-dec.c $(CONFIG_H) $(SYSTEM_H) coretypes.h $(TM_H) \ $(TREE_H) $(RTL_H) $(TM_P_H) hard-reg-set.h $(BASIC_BLOCK_H) insn-config.h \ $(REGS_H) $(FLAGS_H) output.h $(FUNCTION_H) $(EXCEPT_H) $(DIAGNOSTIC_CORE_H) $(RECOG_H) \ - $(EXPR_H) $(TIMEVAR_H) $(TREE_PASS_H) $(DF_H) $(DBGCNT_H) $(TARGET_H) + $(EXPR_H) $(TIMEVAR_H) $(TREE_PASS_H) $(DF_H) $(DBGCNT_H) $(TARGET_H) \ + $(OPTABS_H) addresses.h cfg.o : cfg.c $(CONFIG_H) $(SYSTEM_H) coretypes.h $(TM_H) $(RTL_H) $(FLAGS_H) \ $(REGS_H) hard-reg-set.h output.h $(DIAGNOSTIC_CORE_H) $(FUNCTION_H) $(EXCEPT_H) $(GGC_H) \ $(TM_P_H) $(TIMEVAR_H) $(OBSTACK_H) $(TREE_H) alloc-pool.h \

13 years, 4 months

1
0
0 0

Patch drop: Rework MEM rtx_costs

by Richard Sandiford

I originally wrote this patch as part of the auto-inc-dec work. I didn't submit it because I wasn't sure what value of extra_writeback_latency was appropriate for A9. (I was hoping to crib it from Ramana's pipeline description.) The patch introduces three new fields to the costs structure: one to control the latency of core loads, one to control the latency of NEON loads, and one to control the penalty of address writeback. The patch includes a tweak for cases where we use two VLDRs. That part should obviously be dropped if we change the move patterns to use something else. Richard gcc/ * config/arm/arm-protos.h (tune_params): Add core_mem_latency, neon_mem_latency and extra_writeback_latency. * config/arm/arm.c (arm_slowmul_tune, arm_fastmul_tune) (arm_strongarm_tune, arm_xscale_tune, arm_9e_tune, arm_v6t2_tune) (arm_cortex_tune, arm_cortex_a5_tune, arm_cortex_a9_tune) (arm_fa726te_tune): Populate the new tune_params fields. (arm_mem_cost): New function. (arm_rtx_costs_1): Use it. Index: gcc/config/arm/arm-protos.h =================================================================== --- gcc/config/arm/arm-protos.h 2011-08-09 15:01:14.000000000 +0100 +++ gcc/config/arm/arm-protos.h 2011-08-09 15:04:58.121984034 +0100 @@ -236,6 +236,9 @@ struct tune_params int l1_cache_size; int l1_cache_line_size; bool prefer_constant_pool; + int core_mem_latency; + int neon_mem_latency; + int extra_writeback_latency; int (*branch_cost) (bool, bool); }; Index: gcc/config/arm/arm.c =================================================================== --- gcc/config/arm/arm.c 2011-08-09 15:01:14.000000000 +0100 +++ gcc/config/arm/arm.c 2011-08-09 15:07:07.215103271 +0100 @@ -840,6 +840,9 @@ const struct tune_params arm_slowmul_tun 5, /* Max cond insns. */ ARM_PREFETCH_NOT_BENEFICIAL, true, /* Prefer constant pool. */ + 2, + 2, + 0, arm_default_branch_cost }; @@ -851,6 +854,9 @@ const struct tune_params arm_fastmul_tun 5, /* Max cond insns. */ ARM_PREFETCH_NOT_BENEFICIAL, true, /* Prefer constant pool. */ + 2, + 2, + 0, arm_default_branch_cost }; @@ -865,6 +871,9 @@ const struct tune_params arm_strongarm_t 3, /* Max cond insns. */ ARM_PREFETCH_NOT_BENEFICIAL, true, /* Prefer constant pool. */ + 2, + 2, + 0, arm_default_branch_cost }; @@ -876,6 +885,9 @@ const struct tune_params arm_xscale_tune 3, /* Max cond insns. */ ARM_PREFETCH_NOT_BENEFICIAL, true, /* Prefer constant pool. */ + 2, + 2, + 0, arm_default_branch_cost }; @@ -887,6 +899,9 @@ const struct tune_params arm_9e_tune = 5, /* Max cond insns. */ ARM_PREFETCH_NOT_BENEFICIAL, true, /* Prefer constant pool. */ + 2, + 2, + 0, arm_default_branch_cost }; @@ -898,6 +913,9 @@ const struct tune_params arm_v6t2_tune = 5, /* Max cond insns. */ ARM_PREFETCH_NOT_BENEFICIAL, false, /* Prefer constant pool. */ + 2, + 2, + 0, arm_default_branch_cost }; @@ -910,6 +928,9 @@ const struct tune_params arm_cortex_tune 5, /* Max cond insns. */ ARM_PREFETCH_NOT_BENEFICIAL, false, /* Prefer constant pool. */ + 2, + 2, + 1, arm_default_branch_cost }; @@ -924,6 +945,9 @@ const struct tune_params arm_cortex_a5_t 1, /* Max cond insns. */ ARM_PREFETCH_NOT_BENEFICIAL, false, /* Prefer constant pool. */ + 2, + 2, + 0, arm_cortex_a5_branch_cost }; @@ -935,6 +959,9 @@ const struct tune_params arm_cortex_a9_t 5, /* Max cond insns. */ ARM_PREFETCH_BENEFICIAL(4,32,32), false, /* Prefer constant pool. */ + 2, + 2, + 0, arm_default_branch_cost }; @@ -946,6 +973,9 @@ const struct tune_params arm_fa726te_tun 5, /* Max cond insns. */ ARM_PREFETCH_NOT_BENEFICIAL, true, /* Prefer constant pool. */ + 2, + 2, + 0, arm_default_branch_cost }; @@ -6848,6 +6878,41 @@ thumb1_rtx_costs (rtx x, enum rtx_code c } } +/* Return the cost in insns of a memory reference of mode MODE to + address ADDR. */ + +static int +arm_mem_cost (enum machine_mode mode, rtx addr) +{ + int count, base; + + count = ARM_NUM_REGS (mode); + if (TARGET_NEON + && (VALID_NEON_DREG_MODE (mode) + || VALID_NEON_QREG_MODE (mode) + || VALID_NEON_STRUCT_MODE (mode))) + { + base = current_tune->neon_mem_latency; + + if (count == 4 && (GET_CODE (addr) == PLUS || CONSTANT_P (addr))) + /* In this case we use two VLDRs. */ + return COSTS_N_INSNS (base + 2); + + /* Assume that one quad can be accessed each cycle. */ + return COSTS_N_INSNS (base + (count + 3) / 4); + } + + base = current_tune->core_mem_latency; + + if (count == 1 && GET_RTX_CLASS (GET_CODE (addr)) == RTX_AUTOINC) + /* On some targets (like A8), core accesses chained by address + register writeback cannot issue in consecutive cycles. + Pessimize writeback to account for this. */ + base += current_tune->extra_writeback_latency; + + return COSTS_N_INSNS (base + count); +} + static inline bool arm_rtx_costs_1 (rtx x, enum rtx_code outer, int* total, bool speed) { @@ -6860,9 +6925,7 @@ arm_rtx_costs_1 (rtx x, enum rtx_code ou switch (code) { case MEM: - /* Memory costs quite a lot for the first word, but subsequent words - load at the equivalent of a single insn each. */ - *total = COSTS_N_INSNS (2 + ARM_NUM_REGS (mode)); + *total = arm_mem_cost (mode, XEXP (x, 0)); return true; case DIV:

13 years, 4 months

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Goodbye

by Ira Rosen

Hi, Thank you all for an interesting and pleasant experience. I am very grateful to Linaro for the opportunity to meet and work with such an amazing group of people. I wish you all the best, and hope to meet you again (at least online). You can find me at irar(a)il.ibm.com or ira.rsn(a)gmail.com. Ira

13 years, 4 months

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[ACTIVITY] WW51

by Zhenqiang Chen

Summary: * Read armV7-A/R reference manual; crosstool-ng patches and wrapper scripts. Details: 1. Patches for crosstool-ng: * Fix symlink issue when CT_USE_SYSROOT is not enabled. * Update sample/linaro-arm-none-eabi (baremetal) to disable SYSROOT. So that both include and lib files are in the same dir. 2. Study armV7-A/R reference manual. 3. Validate embedded toolchain Dec. release. 4. Enhance the wrapper to use crosstool-ng for embedded toolchain. Plan: * Ramp-up on gcc. Best regards! -Zhenqiang

13 years, 4 months

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[ACTIVITY] weekly status

by Revital Eres

Submitting patch for Bug #879725: http://gcc.gnu.org/ml/gcc-patches/2011-12/msg01459.html Looking at the performance results running SMS with automatic testing. This is my last week in Linaro so I would also like to thank you all for the interesting year -- it was a great experience for me to work in this project. I wish you all good luck and happy holidays! Revital

13 years, 4 months

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[ACTIVITY] weekly status

by Ken Werner

Hi, OpenEmbedded-Core: * No response on the CSL patches I posted to the ml yet * khem says someone (other than me) needs to try them * Linaro binary toolchain * Runs on Oneiric-X86_64 after installing lsb-core (interpreter: /lib/ld-lsb.so.3) * The do_rootfs tasks fails with runtine dependecy issues when using the external-linaro-toolchain_arm-2011.11.bb recipe. When re-using my CSL 2011.03 recipe with the linaro toolchain the error doesn't show up - strange. * OE-Core build gets confused by the (arm-linux-gnueabi-)pkg-config of the external linaro toolchain. As a workaround I just renamed this script. * The qemuarm MACHINE configuration uses "-march=armv5te -mno-thumb" Since the linaro toolchain defaults to thumb and -mno-thumb has no effect some inline assemblies are failing (i.e. on the umull insn). GNU #47930 suggests using -marm instead -> OE-Core patch posted. * Got the core-image-minimal to build, but it doesn't run yet (I suspect some basic runtime dependencies like libc again) * The build of the sato image fails (seems libtool and/or C++ related - need to investigate) Regards Ken

13 years, 4 months

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Fwd: [ACTIVITY] w51

by Asa Sandahl

Hi, * Continued with comparison of eembc results for gcc4.4 and gcc 4.6 (FSF and Linaro). Collecting results for 4.6 with loop-unrolling turned off. * Working on a plotbench.py script that will use matplotlib for plotting the results. Right now the script plots the geomean value, for instance for eembc. I now try to make it plot all subtest as well. Then it should also show relative improvements instead of just the numbers, and then also sorted from best to worse. This script depends on Michaels script libtabulate.py for transforming the tabulated file back to python records. * Will be back January 9 /Regards Åsa

13 years, 4 months

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[ACTIVITY] Nov 19 - Dec 22

by Ulrich Weigand

== GDB == * Ongoing work on remote support for "info proc" and core file generation. Completed implementation of latest solution via accessing arbitrary files on the remote site, only to run into a fundamental design problem ... so it's probably back to the previous approach. Discussion on the list is ongoing. * Fixed a GDB 7.4 test suite failure on ARM: PR tdep/12797 * Fixed another GBD 7.4 test suite failure on ARM, by enabling pthread_t thread debugging on core files. == GCC == * Patch review week. Mit freundlichen Gruessen / Best Regards Ulrich Weigand -- Dr. Ulrich Weigand | Phone: +49-7031/16-3727 STSM, GNU compiler and toolchain for Linux on System z and Cell/B.E. IBM Deutschland Research & Development GmbH Vorsitzender des Aufsichtsrats: Martin Jetter | Geschäftsführung: Dirk Wittkopp Sitz der Gesellschaft: Böblingen | Registergericht: Amtsgericht Stuttgart, HRB 243294

13 years, 4 months

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cdce3.C execution fault

by Michael Hope

Hi there. I've looked further into the intermittent gcc/testsuite/g++.dg/cdce3.C test failures. Taking Ira's vectoriser-only fix-pr51301-4.6 branch and comparing it with it's predecessor r106845: * cdce3.o itself is identical across compilers * Fault occurs in a parallel test run as part of the normal auto build * Fault occurs every time * Fault occurs with a manual 'make check-gcc RUNTESTFLAGS="dg.exp=cdce*' * Fault doesn't occur when building from the command line * Fault doesn't occur after updating binutils I'm suspicious of the linker. The auto builders are Natty based and come with ld 2.21.0.20110327. Updating them to Oneiric's 2.21.53.20110810 clears the problem. I've saved the build trees. I see no reason not to commit ~ramana/gcc-linaro/fix-lp-900426 and ~irar/gcc-linaro/fix-pr51301-4.6. -- Michael

13 years, 4 months

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[ACTIVITY] Nov 12 - Dec 16

by Ulrich Weigand

== GDB == * Ongoing work on remote support for "info proc" and core file generation. Implemented initial version of latest solution via accessing arbitrary files on the remote site. == GCC == * Started familiarizing myself with current status of various performance patches in programm, in preparation of my taking on GCC performance work next year. Mit freundlichen Gruessen / Best Regards Ulrich Weigand -- Dr. Ulrich Weigand | Phone: +49-7031/16-3727 STSM, GNU compiler and toolchain for Linux on System z and Cell/B.E. IBM Deutschland Research & Development GmbH Vorsitzender des Aufsichtsrats: Martin Jetter | Geschäftsführung: Dirk Wittkopp Sitz der Gesellschaft: Böblingen | Registergericht: Amtsgericht Stuttgart, HRB 243294

13 years, 4 months

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[ACTIVITY] WW 50

by Zhenqiang Chen

Summary * make check-gcc on windows. * crosstool-ng patches Details: 1. Two patches for crosstool-ng: * Fix the compile error when CT_USE_SYSROOT is not "y". With this fix, we can config crosstool-ng to remove the symbol link for windows build. * Add scripts to build manual for newlib. 2. make check-gcc on Windows: * Wrap gcc/g++ for windows test. testglue.c should be compiled with gcc not g++. * Enhance scripts to convert path using "cygpath -w" 3. Analyze and root cause the pseudo new failed cases on windows. * gcc fail cases (gcc.dg/cpp/assert3.c, gcc.dg/cpp/include7.c and gcc.dg/cpp/trad/assert3.c) Root cause: " in options are removed in the test scripts. e.g. When reading gcc.log, you can find “-Aabc = jkl” in "Executing on host" as: Executing on host: …/cpp/assert3.c -A abc=def -A abc(ghi) "-Aabc = jkl" … But in spawn: the “” are removed. spawn …/cpp/assert3.c -A abc=def -A abc(ghi) -Aabc = jkl * g++ fail cases (dwarf2/lineno-simple1.C, dwarf2/pr44641.C and dwarf2/pr46527.C) The assembler codes generated from windows g++ and linux g++ are same except the PATH string. And all PASS on linux test. It seams the scripts can not grep the expected string on windows. * Tests on windows are not stable. For each test, there will have random fail cases (pass when retesting separately). Plans: * Create Makefile for embedded toolchain in linaro crosstool-ng. Best regards! -Zhenqiang

13 years, 4 months

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Dependencies between Linaro toolchain and GDB/Linux Kernel

by Gibson, David

Hi, I was just wondering if anyone knows of any current or future dependencies with the Linaro toolchain (2011.11) and the Linaro release of GDB and the Linux Kernel? Is it considered safe to use the toolchain with the upstream releases of GDB and the Kernel, assuming that the versions of each are suitably compatible? Or are there potential dependencies on work that has been done in the toolchain? For example, new instructions supported in the compiler/assembler, or enhancements to the kernel/runtime library on the Linaro branch that would depend on them being in sync. Thanks, Dave.

13 years, 4 months

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[ACTIVITY] weekly status

by Ken Werner

Hi, OpenEmbedded-Core: * the CSL 2011.03 recipe works with localization support disabled * got the OE-Core sato image to built (~250 source packages) * also built the Qt4 demo image (~100 source packages) to stress the C++ part of the toolchain * both are booting using qemu and seem to work just fine. * all of the Linaro members approved the request to contribute to OpenEmbedded * started to post patches onto the mailing list * briefly looked at the Linaro binary toolchain * the most recent one is dynamically linked * while the old one has old binutils (.21) that causes issue with --gc-sections * Currently the build is using the OE qemuarm machine configuration that uses a Yocto kernel and targets armv5te. This is something I'd like to look at too. Regards Ken

13 years, 4 months

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[ACTIVITY] weekly status

by Revital Eres

Re-submitted the patch to estimate register pressure in SMS to the gcc-patches ml after discussing the patch with Richard.

13 years, 4 months

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[ACTIVITY] 12th - 16th December

by Andrew Stubbs

Continued work on 64-bit shifts. - Improved 64-bit shifts without NEON (should benefit all cases). - Fixed bugs in constant shift code. - Rewrote 64-bit neon patch to take advantage of the new non-neon code, in the fall-back case. - Titied up the code, in general. - Rewrote SImode shift amount patch for new neon patches. The code produced now seems pretty good, but it still seems to choose which mode to use slightly haphazardly. The next step is to figure that out and benchmark the results. Had a few more attempts at getting the LAVA system to do something useful for me. I'm getting closer, but keep hitting new problems. Some of them my fault, and some are bugs in the system. Paul Larson has been very kindly helping me out and swatting the bugs. Didn't get much further with benchmarking for the generic tuning. This has been put on the back-burner while I work on the Neon shifts, and my test runs on my IGEPv2 A8 board have all been interrupted by power cuts or rendered useless by my forgetting to kill background tasks (such as Xorg). ---- Next weeks On vacation December 19th - January 3rd (returning January 4th).

13 years, 5 months

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[ACTIVITY] 2011-12-16

by David Gilbert

== General == * Tidying things up and updating my list of statuses == String routines == * Adding strchr and strlen to eglibc; tests running at the moment. Dave

13 years, 5 months

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[ACTIVITY] report week 50

by Peter Maydell

[short week, three days] RAG: Red: Amber: Green: Current Milestones: || || Planned || Estimate || Actual || ||upstream-omap3-cleanup || 2011-11-10 || 2011-12-15 || 2011-12-12 || ||cp15-rework || 2012-01-06 || 2012-01-17 || || ||initial-a15-system-model || 2012-01-27 || 2012-01-27 || || ||qemu-kvm-getting-started || 2012-03-04?|| 2012-03-04?|| || (for blueprint definitions: https://wiki.linaro.org/PeterMaydell/QemuKVM) Historical Milestones: ||add-omap3-networking || 2011-10-13 || 2011-10-13 || 2011-10-13 || ||a15-systemmode-planning || 2011-10-13 || 2011-10-13 || 2011-09-22 || ||a15-usermode-support || 2011-11-10 || 2011-11-10 || 2011-10-27 || == cp15-rework == * estimate pushed back a bit because I've ended up doing this in parallel with the other blueprints. Also exynos4210 review has taken some time. == upstream-omap3-cleanup == * split up the last handful of patches in the stack which were doing several things at once * this blueprint is now complete, meaning that the next stage of omap3 upstreaming will be cleaning up individual subsets of functionality to send upstream. This is all backburner level priority, though. == other == * reviewed most of Samsung's exynos4210 model * completed a conflict-heavy rebase of qemu-linaro (the result of MemoryRegion conversions for omap devices landing upstream) * LP:903239 : added linux-user support for some missing xattr syscalls that were causing build problems for apparmor -- PMM

13 years, 5 months

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