- linaro-toolchain - lists.linaro.org

by Ulrich Weigand

== GDB == * Posted patch to fix shared library remote test problems (#804387). * Started reviewing Yao's latest Thumb-2 displaced stepping patch. == GCC == * Reviewed and approved Richard's mainline reload patch to fix #803232 (ICE on code that uses vld4q_s16() NEON intrinsic). * Followed up on gcc-patches to address concerns about Julian's unaligned access patch. 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

14 years, 1 month

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[ACTIVITY] Weekly status

by Richard Sandiford

== This week == * Looked at why the fix for #721531 wasn't working on the Linaro branches. Wrote follow-up patches for both. Fix now committed to 4.5 and 4.6. * Looked at #736007. Submitted and committed patch upstream. * Looked at some "odd" ivopts behaviour. It turned out that this was working mostly as expected. I'm still wondering about a couple of tweaks. * Looked briefly at a miscompilation of vector code that turned out to occur during predictive commoning. I haven't yet checked whether the bug is there or not. For the time being, I'm using -fno-predictive-commoning so that I can get on with other stuff. * Looked at why the auto-inc-dec stuff wasn't as effective with current mainline. It turns out that the new misaligned load/store patterns are using overly weak predicates, so it appears to the RTL optimisers as though we support reg+offset addresses. * Reviewed the shrink-wrap patch. * More auto inc/dec. == Next week == * Backport the fix for #736007. * More loop stuff. Richard

14 years, 1 month

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[ACTIVITY] 4th - 8th July

by Asa Sandahl

Achieved: * HW in place. Borrowed another Panda board that I can use permanently. * linaro-media-create installed and working. Flashed sd-card with 11.05 for Panda board. * Played around with the Panda board. Networking is on the way. I can ssh to my computer from the Panda but not the other way around yet. Issues: * Serial log from Panda board not working yet. Mike suggested I try a straight-through cable instead in of a null-modem cable. (Have not done this yet.) * The ST-E firewall (proxy) is causing me some headache. But at least everyone here is facing the same issues, so there are people to talk to about the problems. Good to know: * I will be on vacation 18th July - 15 August Best Regards Åsa

14 years, 1 month

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[ACTIVITY] July 3-6

by Ira Rosen

Hi, - continued working on prevention of over-widening in vectorization - finalizing the patch - improvement of vectorizer peeling heuristic - merged to gcc-linaro-4.6 - vectorization of widen-mult with over-promoted operands - proposed for merge to gcc-linaro-4.6 - fixed PR 49610 - patch reviews I am on vacation tomorrow and on Sunday. Ira

14 years, 1 month

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LLVM on ARM testing.

by Karel Gardas

Hello, I'm interested in LLVM correct performance on ARM hardware and it looks like LLVM is kind of sensitive to what GCC version is used for its compilation. I tested LLVM 2.9 as a reference point and LLVM HEAD as of June 29 on ARMv7 (two boards with two different Ubuntu versions) compiled by GCC 4.3.4, 4.4.1, 4.4.5, 4.5.2, 4.6.1 Linaro 2011.05 and 4.6.1 Linaro 2011.06. Please see http://ghcarm.wordpress.com/2011/07/03/llvm-on-arm-testing/ It looks like LLVM HEAD does have about 28 regressions in comparison with LLVM 2.9. But also Linaro's GCC 4.6.1s do have some regressions in comparison with older GCC 4.3.4 and 4.4.1. Also what is really interesting with LLVM is how much tests fails when compiled with -O2 or default -O3 compilation option. I don't know if the culprit here is LLVM code or just GCC miscompilation/overoptimization? Is there any testing I may do to help you fix those regressions? Thanks, Karel

14 years, 1 month

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[ACTIVITY] 27th June - 1st July

by Andrew Stubbs

Worked on updates to the widening multiplies patches following upstream review. This was never going to be as easy as it first looked, so I've spent much of the week trying to figure out how make annoying type casts go away. Merged both FSF GCC 4.5 and 4.6 to Linaro GCC. Pushed the new tree to Launchpad for testing. ---- Upstream patched requiring review: * NEON scheduling patch http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01431.html * Widening Multiplies 1/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08721.html * Widening Multiplies 2/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08723.html * Widening Multiplies 3/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08724.html * Widening Multiplies 4/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08725.html * Widening Multiplies 5/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08726.html * Widening Multiplies 6/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08727.html * Widening Multiplies 7/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08728.html

14 years, 1 month

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[ACTIVITY] weekly status

by Ken Werner

Hi, * continued to look into how to add remote support for libunwind using ptrace * reworked the lookup of the ARM specific unwind tables for local unwinding * re-use the existent (dwarf related) infrastructure to find the ARM specific unwind tables rather than doing it on our own * removes some code and the limitation of only supporting a certain amount of unw tables * (hopefully) smooths the way for remote unwinding via ptrace * submitted a patch that fixes the syntax of inline assemblies for some GCC versions Regards Ken

14 years, 1 month

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[Activity] June 23 - July 1

by Ramana Radhakrishnan

(This is a combined report having realized that I didn't manage to send this out on Monday because of some power issues). == GCC == == Progress == * Cleared out some backlog of backports from mainline. * Investigating some of the BRANCH_COST results. * Small patches to fix VFP constraints being tested and fixed on trunk upstream. * Upstream bugzilla triaging. * Upstream bugzilla triaging. * Looked at Neon 64 bit arithmetic and sent out report. * Reviewed the unaligned access patch and the EPILOGUE_USES regression with coremark. * Issues with my panda board means my benchmark runs aren't happening. Need to urgently find a way of running them. The panda board dies mysteriously once a while. Playing around with the kernel to get something going . Will look at it again next week. * Merged neon shift immediates patch into linaro-4.6 but needs some rework. * Merged the fix for LP744754 into linaro 4.5 and 4.6 == Plans == * Back on to BRANCH_COST . * Resubmit neon shift immediates patch for merging. * Look at some of the perf regressions between a8 and A9. * Get a working panda board again. ! * Backport arith_shiftsi patch to 4.6 branch upstream. Meetings: * 1-1s * TCWG calls.

14 years, 1 month

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[ACTIVITY] Weekly status

by Richard Sandiford

== This week == * More on the address-of-main() bug. The original patch caused regressions on x86_64, so I submitted a different approach, which has now been applied upstream. * Worked on the libnih bug. It turned out to be a problem in the libc start routine. * A bit of patch review. * More on auto inc/dec. == Next week == * General bug-fixing. * More auto inc/dec. Richard

14 years, 1 month

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[ACTIVITY] 2011-07-01

by David Gilbert

== 64 bit atomics == * Submitted patches to gcc patch list - One comment back already asking if we should really change ARM to have a VDSO to make checks of the user helper version easier * Added thumb ldrexd/strexd to valgrind; patch added to bug in their bugtracker (KDE bug 266035) * Came to the conclusion eglibc doesn't actually need any changes - It's got a place holder for a 64bit routine, but it's unused and isn't exposed to the libc users - Note that neither eglibc or glibc built cleanly from the trunk on ARM. * Started digging into QEmu a bit more to find out how to solve the helper problem == String routines == * Added SPEC2k6 string routine results to my charts; while most stuff is in the noise it seems the bionic routine is a bit slower overall than everything else, and my absolutely trivially simple ~5 instruction loop is a tie for the fastest with my smarter 4 byte/loop using uadd. == Next week == * Sleep, Rest, Relaxation, getting older * (Will be polling email for any more follow ups on my gcc patches) Dave

14 years, 1 month

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[ACTIVITY] Jun 27 - Jul 1

by Ulrich Weigand

== GDB == * Analyzed all failures and skipped tests in remote gdb testsuite. Opened bug reports to track problems and missing features: 804387 [remote testsuite] Shared library test problems 804392 [remote testsuite] Rebuilt executables not copied 804396 [remote testsuite] Spurious failures 804400 [remote testsuite] Unnecessarily disabled tests 804401 [remote testsuite] Thread support 804403 [remote testsuite] Support for "attach" tests 804405 [remote testsuite] Core file tests 804406 [remote feature] Generate core files 804407 [remote feature] fork/vfork/exec events 804408 [remote feature] Address space randomization 804409 [remote feature] Checkpoints 804411 [remote feature] "info proc" == GCC == * Reviewed several Linaro GCC merge requests. * Fixed mainline reload bug PR rtl-optimization/49114 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

14 years, 1 month

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[ACTIVITY] report week 26

by Peter Maydell

RAG: Red: Amber: Green: Current Milestones: || || Planned || Estimate || Actual || ||qemu-linaro-2011-07 || 2011-07-21 || 2011-07-21 || || Historical Milestones: (q1 milestones deleted) ||qemu-linaro 2011-04 || 2011-04-21 || 2011-04-21 || 2011-04-21 || ||qemu-linaro 2011-05 || 2011-05-19 || 2011-05-19 || n/a || ||close out 1105 blueprints || 2011-05-28 || 2011-05-28 || 2011-05-19 || ||complete 1111 planning || 2011-05-28 || 2011-05-28 || 2011-05-27 || ||qemu-linaro-2011-06 || 2011-06-16 || 2011-06-16 || 2011-06-16 || == upstream-omap3-patches * analysed omap3 patchstack and identified some initial parts to pull out * extracted and submitted upstream a 3-patch set to qdevify omap gpio * disentangled a cluster of patches for fixing and qdevifying NAND, ONENAND and the OMAP GPMC model; started on the cleanup process * spotted and fixed a bug where n810 segfaults if a key is pressed (this was already fixed in qemu-linaro but not very cleanly) == other == * submitted patch for proper implementation of prlimit64 syscall for qemu usermode * sent a patch to fix the final gcc 4.6 write-only-variable warning * patch review, etc Current qemu patch status is tracked here: https://wiki.linaro.org/PeterMaydell/QemuPatchStatus Absences: 1-5 August: Linaro sprint 1111 (maybe) 15-16 August: QEMU/KVM strand at LinuxCon NA, Vancouver [LinuxCon proper follows on 17-19th]

14 years, 1 month

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[ACTIVITY] 27th June - 1st July

by Asa Sandahl

* Got introduced to most of the team members - great! * My manager fixed a linaro laptop for med which I have installed with Natty. (This is very good since I cannot run as root on my STEricsson laptop. There are also other security restrictions that makes it very hard to work in Linaro.) * Started working a little bit with the Snowball board. I have managed to flash it using the "riff" tool. * Read through the material about SPEC2000. * I have borrowed a Panda board that I can use for the next two weeks. A question that popped up is how to get one from Linaro? * I will be on vacation 18th July - 15 August Best regards Åsa

14 years, 1 month

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No usb on omap3: 4.6 toolchain issue?

by Paolo Pisati

It all started with this: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/791552 basically, switching toolchain from 4.5 to 4.6, somehow broke usb on omap3. This morning i tested with linux-linaro-natty: [flag@newluxor linux-linaro-natty]$ git log --oneline -1 f15fd8f LINARO: Linux-linaro-2.6.38-1002.3 and i can reproduce the problem there too. Here is some more info (dmesg, toolchain, lsusb, etcetc): http://pastebin.ubuntu.com/620786/ -- bye, p.

14 years, 1 month

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[ACTIVITY] June 26-30

by Ira Rosen

Hi, - support of multiple uses of original pattern statements (needed for over-promotion work) - committed upstream - support of widen-mult of unsigned types and constants - merged to gcc-linaro-4.6 - vectorizer peeling heuristic improvement - proposed to merge to gcc-linaro-4.6 Ira

14 years, 1 month

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Fwd: [Bug gas/12931] ARM: gas fails to set the proper alignment on code sections, causing broken output

by Dave Martin

See the following commit in binutils trunk. If this is causing problems in other places, it could be worth considering for backport into the linaro tools. Cheers ---Dave http://sourceware.org/bugzilla/show_bug.cgi?id=12931 --- Comment #3 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> 2011-06-29 16:29:43 UTC --- CVSROOT: /cvs/src Module name: src Changes by: nickc(a)sourceware.org 2011-06-29 16:29:38 Modified files: gas : ChangeLog gas/config : tc-arm.c Log message: PR gas/12931 * config/tc-arm.c (mapping_state): When changing to ARM or THUMB state set the minimum required alignment of the section. Patches: http://sourceware.org/cgi-bin/cvsweb.cgi/src/gas/ChangeLog.diff?cvsroot=src… http://sourceware.org/cgi-bin/cvsweb.cgi/src/gas/config/tc-arm.c.diff?cvsro…

14 years, 1 month

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iDCT implementation in GCC NEON intrinsics, for your perusal

by Michael K. Edwards

Here's an implementation of an 8x8 integer DCT done with NEON intrinsics -- essentially a translation of the assembly version in libjpeg-turbo trunk: https://github.com/mkedwards/crosstool-ng/blob/master/patches/libjpeg-turbo… It is in a compilable (on Linaro 2011.05 GCC 4.5, anyway; a recent Linaro 4.6 snapshot ICEs) but otherwise untested state. Still, it's interesting to compare the assembly that it generates against the hand-written version. I thought I'd give linaro-toolchain a heads-up in case y'all could use a test case that generates plenty of pressure on the VFP/NEON register bank. (I intend to use it to see how much performance difference there really is, on the A8 and A9, between NEON code compiled for 16 vs. 32 registers.) Cheers, - Michael

14 years, 1 month

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Added an ARMv5E board

by Michael Hope

I've added a pico-SAM9G45 board to my home office setup. It's called libra1 and runs Debian 6.0. The nice thing about this board is it has 256 MB of RAM and should be able to run SPEC 2000. I'll start using it to check that our GCC changes don't cause significant performance regressions on earlier architectures. Dave, you could use it to test the 64 bit primitives if you want. There's more information on the configuration at: http://bazaar.launchpad.net/~michaelh1/+junk/hardware/view/head:/libra/r1/R… -- Michael

14 years, 1 month

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GCC cross compilation help: [cannot compute suffix of object files]

by mins.lin＠globalunichip.com

Hello, I tried to build the gcc-linaro cross compiler tool on the x86_64 ubuntu-10.04 machine. The build and host machine is the x86_64 ubuntu-10.04, the target is arm-eabi. But failed and got the following error messages: ----- checking host system type... arm-unknown-eabi checking for arm-eabi-ar... arm-eabi-ar checking for arm-eabi-lipo... arm-eabi-lipo checking for arm-eabi-nm... /home/minslin/ET0001A/build-gcc/./gcc/nm checking for arm-eabi-ranlib... arm-eabi-ranlib checking for arm-eabi-strip... arm-eabi-strip checking whether ln -s works... yes checking for arm-eabi-gcc... /home/minslin/ET0001A/build-gcc/./gcc/xgcc -B/home/minslin/ET0001A/build-gcc/./gcc/ -B/home/minslin/linaro-gcc/arm-eabi/bin/ -B/home/minslin/linaro-gcc/arm-eabi/lib/ -isystem /home/minslin/linaro-gcc/arm-eabi/include -isystem /home/minslin/linaro-gcc/arm-eabi/sys-include checking for suffix of object files... configure: error: in `/home/minslin/ET0001A/build-gcc/arm-eabi/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/minslin/ET0001A/build-gcc' make: *** [all] Error 2 ----- The configure options I used were: ----- ../gcc-linaro-4.5-2011.06-0/configure --target=arm-eabi --enable-languages=c,c++ --enable-shared --prefix=/home/minslin/linaro-gcc --with-gmp=/home/minslin/gmp --with-mpfr=/home/minslin/mpfr --with-mpc=/home/minslin/mpc ----- I downloaded and built the GMP, MPFR and MPC packages. The versions I used are: gmp-5.0.2 mpfr-3.0.1 mpc-0.8.2 Please help me solving this problem. Thanks. Best regards, ------------------------------------------------------------ Min-Shong Lin (林敏雄) Engineering Division Global UniChip Corp. (創意電子) EMAIL : mins.lin(a)globalunichip.com TEL : +886-3-5646600 ext. 6937 --------------------------------- Email Confidentiality Notice ------------------------------------------ If you are not the intended recipient for this CONFIDENTIAL E-mail, please delete it immediately without keeping or distributing any copy and notify the sender. ----------------------------------------------------------------------------------------------------------------------

14 years, 1 month

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[ACTIVITY] 20th - 24th June

by Andrew Stubbs

Continued work on widening multiplies. Finally got a point where I have something I'm happy to post upstream! Posted here: http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08720.html Richard Guenther reviewed one of the patches, and found a flaw, so I've been working on addresssing that. Booked hotel for August sprint. ---- Upstream patched requiring review: * NEON scheduling patch http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01431.html * Widening Multiplies 1/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08721.html * Widening Multiplies 2/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08723.html * Widening Multiplies 3/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08724.html * Widening Multiplies 4/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08725.html * Widening Multiplies 5/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08726.html * Widening Multiplies 6/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08727.html * Widening Multiplies 7/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08728.html

14 years, 1 month

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[ACTIVITY] 2011-06-24

by David Gilbert

== Atomics == * Testing the libgcc fallback code with Nicholas's kernel patch - and then fixing my initialisation code to use init_array's (thanks Richard for the hint) * Tidying stuff up after a review of my patch by Richard - the sync.md is now smaller than the original before I started. * Discussing sync semantics with Michael Edwards - he's spotted that the gcc ARM sync routines need to move their final memory barrier for the compare-exchange case where the compare fails. * Looking at valgrind; it looks like it should be OK with the commpage changes; but it doesn't currently support ldrexd and strexd; there is a patch for it to do ARM mode but not thumb yet. Dave

14 years, 1 month

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[ACTIVITY] Weekly status

by Richard Sandiford

== This week == * Catching up on email. * More experiementation with the auto inc/dec stuff. TBH, this has taken longer than expected, but I think it's close now. * Wrote a dejagnu testcase for PR 49196. Tested it on trunk and submitted it upstream. == Next week == * Backport fix for PR 49196. * Look at NEON reload failure. * More auto inc/dec. Richard

14 years, 1 month

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[ACTIVITY] report week 24

by Peter Maydell

RAG: Red: Amber: Green: Current Milestones: || || Planned || Estimate || Actual || ||qemu-linaro-2011-07 || 2011-07-21 || 2011-07-21 || || Historical Milestones: ||finish qemu-cont-integn || 2011-01-25 || 2011-01-25 || handed off || ||first qemu-linaro release || 2011-02-08 || 2011-02-08 || 2011-02-08 || ||qemu-linaro 2011-03 || 2011-03-08 || 2011-03-08 || 2011-03-08 || ||qemu-linaro 2011-04 || 2011-04-21 || 2011-04-21 || 2011-04-21 || ||qemu-linaro 2011-05 || 2011-05-19 || 2011-05-19 || n/a || ||close out 1105 blueprints || 2011-05-28 || 2011-05-28 || 2011-05-19 || ||complete 1111 planning || 2011-05-28 || 2011-05-28 || 2011-05-27 || ||qemu-linaro-2011-06 || 2011-06-16 || 2011-06-16 || 2011-06-16 || == other == * wrote a number of patches fixing issues identified by exhaustive testing of the ARM decoder. Still some parts of the Thumb decoder to deal with. * discussion about 1176 (somebody has some patches to add support for it) and what set of feature switches are needed to support this and the 1136r1 (they have most but not all of the v6K feature set) * sent some patches which deal with the "VLDM/VSTM generate too many TCG ops" bug by raising the limit on number of TCG ops * sent a pull request for some ARM patches that had been languishing on the mailing list * tracked down a regression making vexpress crash when run on upstream QEMU to a recent Xen-related patch * working on AFDS (annual review) paperwork Meetings: toolchain, standup Lots of interrupts/bugfixing/review recently means I'm drifting slightly behind schedule on blueprints. Need to refocus on those next week. Current qemu patch status is tracked here: https://wiki.linaro.org/PeterMaydell/QemuPatchStatus Absences: 1-5 August: Linaro sprint 1111 (maybe) 15-16 August: QEMU/KVM strand at LinuxCon NA, Vancouver [LinuxCon proper follows on 17-19th]

14 years, 1 month

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[ACTIVITY] Jun 20 - Jun 24

by Ulrich Weigand

== GDB == * Completed setup and baseline run for remote gdb testsuite. This involved tracking down and working around a variety of problems including: - issues with the cross-compiler packages - board files and sysroot for the debugger to use - timing problems in the dejagnu harness - multiple problems in the GDB testsuite itself At this point, I'm down to about a dozen extra FAILs and about 2000 tests (out of 16000) tests that are not executed in the remote testsuite for one reason or the other. Next step will be to analyze those and create bug reports. 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

14 years, 1 month

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[ACTIVITY] June 19-23

by Ira Rosen

Hi, - investigating detection of general over-widening cases in the vectorizer - improvements of widen-mult - proposed for merge to gcc-linaro-4.6 - fixed PRs 49443 and 49478 Ira

14 years, 1 month

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[ACTIVITY] weekly status

by Ken Werner

Hi, * in order to have the android's debuggerd use libunwind I looked at libunwind's remote interface and especially the libunwind-ptrace lib that sits on top of that. * the remote interface seems a bit awkward to me. The user provides a set of callbacks to access the inferior memory or registers. Instead of using these callbacks to obtain the actual unwind information (eh_frame fro example) it requires the user implement another callback (find_proc_info) to lookup the unwind info himself. * the libunwind-ptrace currently deos not support the ARM specific unwind tables * started to look into how to improve the situation * not straight forward as it's tightly bound to eh_frame unw info and libunwinds DWARF parsing mechanism * attending a class this afternoon * Note: I'm on vacation starting in a few hours and I'll be back on Tuesday next week. Regards Ken

14 years, 1 month

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[Activity] Week ending 2011-06-17

by Ramana Radhakrishnan

== Progress == * Backported A5 / A15 tuning to Linaro GCC. Waiting for test results. * T2 perf. meeting. * Backported the neon length patch back. * Patch for PR49385 being tested. * Bootstraps broken yet again / upstream maintenance / test regressions. * Waiting on Branch_cost results . * Minor binutils patches as a result of upstream maintenance. == Plans == * Finish BRANCH_COST tuning * Look at VFP moves for some more . * Backport some of the upstream bug fixes that need to be done. Meetings: * 1-1s * TCWG call. * At Google unconference 17-19 June

14 years, 2 months

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[ACTIVITY] 13th - 18th June

by Andrew Stubbs

Chaired the Toolchain Working group call. Michael H was unavailable (but OK) following yet another earthquake in Christchurch. Continued working on my widening multiplies patches. I did think for a while there must be a logic flaw because it's using the wrong sized inputs to instructions, but on closer inspection that was taken care of in the RTL transformations. The changes I already had seem good in all the test cases I could generate. I've also identified a number of additional optimization opportunities, so I've been tweaking the patch for those. Continued trying to figure out why my Thumb2 constants patches break the native bootstrap build. The stage2 compiler enters an infinite loop, but I couldn't easily identify why, as yet. Backported Julian's unaligned access patches to a Linaro test branch. ---- Upstream patched requiring review: * NEON scheduling patch http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01431.html

14 years, 2 months

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[ACTIVITY] Weekly status

by Richard Sandiford

== This week == * Experimented more with A8 and A9 tuning for auto inc/dec addresses. * More work on the auto inc/dec pass itself. * Compared the assembly output in the GCC testsuite for a range of targets (avr, bfin, h8300, ia64, m32c, m32r, m68k, am33, pa, pdp11, powerpc, rx, score, sh, xstormy16 and vax). * Looked at a few bug reports. Will submit patches when I get back. == Next week == * Holiday! Richard

14 years, 2 months

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[ACTIVITY] 2011-06-17

by David Gilbert

== 64 bit Atomics == * Wrote more test cases; now have a nice 3 thread test that passes - and more importantly, it fails if I replace one of the atomic ops by a non-atomic equivalent. * Modified existing atomic helper code in libgcc to do 64bit * Added init function to 64bit atomic helper to detect presence of new kernel and fail if an old one is present. That last one is a bit of a pain; it now correctly exits on existing kernels and aborts; qemu user space seg faults because access to the kernel helper version address is uncaught. So first thing I need to do is try the early kernel patch Nicolas sent around, and then I really need to see if qemu can be firmly persuaded to run it. == String routines == * Ran denbench with sets of strlen; started running some spec as well. == QEmu == * Tested Peter's prelease tarball in user space and a bunch of system emulations - successfully managed to say hello to #linaro from an emulated overo board using USB keyboard. == Other == * Booked 4th July week off. Dave

14 years, 2 months

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[ACTIVITY] weekly status

by Ken Werner

Hi, * short week (Monday -> public holiday, Wednesday -> attended a class) * tested the gcc-linaro-4.5-2011.06 with linaro-android on my panda * works! no noticeable differences to 4.5-2011.05 for me * libgui.so apriori prelink issue remains: * realized that apriori works quite different from GNU prelink * checked the prelink map against LOAD segment size - looks good * build with -DLINKER_DEBUG=1 - still doesn't give hints * give up for know and moving on * made a patchset to be able to build whole android with -DDEBUG * except of v8 and webkit * zygote segfaults for unknown reason * understood the basics of the current backtracing mechanism on android * the bionic linker registers signal handlers on SIGSEGV that opens a socket * the debuggerd listens on that socket and gets its regs etc. using ptrace * Note: I'll be on vacation starting on Thursday next week Regards Ken

14 years, 2 months

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[ACTIVITY] Jun 14 - Jun 17

by Ulrich Weigand

== GDB == * Committed support for NEON registers in core dumps (bug #615972) to mainline GDB and binutils repositories. * Added support to readelf (mainline binutils) to correctly display NEON register core file notes. * Started looking into remote gdb testsuite. == GCC == * Investigated reload failure when building kernel with Linaro GCC 4.5 (discovered by Arnd). * Investigated stray function references due to partial inlining breaking kernel build with Linaro GCC 4.6 (discovered by Arnd). 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

14 years, 2 months

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[ACTIVITY] report week 24

by Peter Maydell

RAG: Red: Amber: Green: Current Milestones: || || Planned || Estimate || Actual || ||qemu-linaro-2011-06 || 2011-06-16 || 2011-06-16 || 2011-06-16 || ||qemu-linaro-2011-07 || 2011-07-21 || 2011-07-21 || || Historical Milestones: ||finish qemu-cont-integn || 2011-01-25 || 2011-01-25 || handed off || ||first qemu-linaro release || 2011-02-08 || 2011-02-08 || 2011-02-08 || ||qemu-linaro 2011-03 || 2011-03-08 || 2011-03-08 || 2011-03-08 || ||qemu-linaro 2011-04 || 2011-04-21 || 2011-04-21 || 2011-04-21 || ||qemu-linaro 2011-05 || 2011-05-19 || 2011-05-19 || n/a || ||close out 1105 blueprints || 2011-05-28 || 2011-05-28 || 2011-05-19 || ||complete 1111 planning || 2011-05-28 || 2011-05-28 || 2011-05-27 || == omap3-usb-model == * fixed some corner case bugs revealed by Dave Gilbert's testing == linaro-qemu-11.11 == * qemu-linaro-2011.06 tested, uploaded and released on schedule == other == * pushed some patches fixing warnings on gcc 4.6 * exhaustive testing of the ARM decoder revealed that vfp load/store multiple with an overlarge immediate would try to store 256 regs and overrun the tcg buffer * set up an armv5 box and repro'd lp:739785 * working on AFDS (annual review) paperwork Meetings: toolchain, standup, GSoC student, 1-2-1, divisional comms. Current qemu patch status is tracked here: https://wiki.linaro.org/PeterMaydell/QemuPatchStatus Absences: 1-5 August: Linaro sprint 1111 (maybe) 15-16 August: QEMU/KVM strand at LinuxCon NA, Vancouver [LinuxCon proper follows on 17-19th]

14 years, 2 months

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Generating ancillary sections with gas

by Dave Martin

Hi Michael, This thread about how to generate ancillary sections using gas has resurfaced again. Do you know who might be available from the toolchain group to take a look at this? It appears that this issue can best be solved by a change to gas (or, possibly, to gcc). Cheers ---Dave References: Dynamic patching in discarded sections <http://thread.gmane.org/gmane.linux.kernel/1152142> Generating ancilliary sections with gas <http://thread.gmane.org/gmane.linux.linaro.toolchain/686>

14 years, 2 months

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Interesting failure of vasprintf test from postler

by Marcin Juszkiewicz

There is a ftbfs on armel bug for postler: https://bugs.launchpad.net/ubuntu/+source/postler/+bug/791319 Attached test compiles fine on amd64 but fails on armel: 20:16 hrw@malenstwo:postler-0.1.1$ gcc _build_/.conf_check_0/test.c _build_/.conf_check_0/test.c: In function ‘main’: _build_/.conf_check_0/test.c:5:1: error: incompatible type for argument 3 of ‘vasprintf’ /usr/include/stdio.h:396:12: note: expected ‘__gnuc_va_list’ but argument is of type ‘char *’ Can someone explain me why this happens? Ubuntu armel and armhf cross compilers, CSL 2011.03-42 have same problem.

14 years, 2 months

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Chromium browser FTBFS on armel

by Marcin Juszkiewicz

Hi Yesterday I looked at bug [1] in chromium-browser but checked oneiric version: 12.0.742.91~r87961. It failed on linking to CUPS libraries so I looked at upstream repository and found fix [2]. With patch applied it failed on same place: LINK(target) out/Release/chrome [keep-alive] czw, 16 cze 2011, 18:21:39 CEST (441 min) /usr/bin/ld.bfd.real: out/Release/obj.target/third_party/cacheinvalidation/../../cacheinvalidation_proto_cpp/gen/protoc_out/google/cacheinvalidation/internal.pb.o(.text._ZN12invalidation21ClientToServerMessage27MergePartialFromCodedStreamEPN6google8protobuf2io16CodedInputStreamE+0x7d2): unresolvable R_ARM_THM_CALL relocation against symbol `operator new(unsigned int)@@GLIBCXX_3.4' /usr/bin/ld.bfd.real: final link failed: Nonrepresentable section on output collect2: ld returned 1 exit status make[1]: *** [out/Release/chrome] Error 1 make[1]: Leaving directory `/home/hrw/devel/porting-jam/chromium-browser-12.0.742.91~r87961/build-tree/src' make: *** [debian/stamp-makefile-build] Error 2 dpkg-buildpackage: error: debian/rules build gave error exit status 2 According to bugs [3][4] package may work when built without -fPIE but (as Loic wrote in [3]) "-fPIE is needed for some security features and web browsers are a critical piece of software that we want to protect". May someone take a look at this issue? One warning: this fail happens after 440 minutes of build on PandaBoard with usb hdd (took 1.8GB of space). If needed I can provide account on my panda with access to build directory (but this rather tomorrow then today) - IPv6 address only. 1. https://bugs.launchpad.net/ubuntu/+source/chromium-browser/+bug/791283 2. http://git.chromium.org/gitweb/?p=chromium/chromium.git;a=patch;h=c2b99f3fe… 3. https://bugs.launchpad.net/binutils-linaro/+bug/641126 4. http://code.google.com/p/chromium/issues/detail?id=55439

14 years, 2 months

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[ACTIVITY] June 12-16

by Ira Rosen

Hi, - fix vectorizer testsuite failures on ARM - committed - committed a fix of a bug in the vectorizer revealed by the widen-mult patch - committed an improvement of peeling heuristic - reduce over-widening in case of multiplication by a constant (improves vectorized rgbyiq by almost 2x) - committed - started backporting to gcc-linaro-4.6 Ira

14 years, 2 months

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[ACTIVITY] Weekly status

by Revital Eres

- Opened PR49385. http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49385 - Committed SMS patch to fix recent bootstrap fail on ARM with SMS flags http://gcc.gnu.org/ml/gcc-patches/2011-06/msg00960.html - Committed SMS patch to Fix calculation of row_rest_count http://gcc.gnu.org/ml/gcc-patches/2011-06/msg01008.html Continue with Spec2006 analysis https://wiki.linaro.org/Internal/ToolChain/Benchmarks - Next two weeks (17 Jun to 2 July) --- vacation.

14 years, 2 months

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Linaro QEMU 2011.06 released

by Peter Maydell

The Linaro Toolchain Working Group is pleased to announce the release of Linaro QEMU 2011.06. Linaro QEMU 2011.06 is the latest monthly release of qemu-linaro. Based off upstream (trunk) QEMU, it includes a number of ARM-focused bug fixes and enhancements. This release introduces two new features; these are still experimental so please report any issues: - A model of the Gumstix Overo board; this is an OMAP3 based system similar to Beagle but with the advantage of having supported onboard ethernet. - USB keyboard and mouse support, if your kernel includes support for the OMAP3 OHCI controller (not just EHCI). Try adding "-device usb-kbd -device usb-mouse" to your QEMU command line for Beagle or Overo models. Other interesting changes include: - A fix for the lack of graphics output on the Beagle model when running the Linaro 11.05 final release image - Suppression of the "Bad register 0x000000f8" warnings provoked by the Linaro 11.05 final release kernels - As usual, various minor correctness fixes and other upstream changes Known issues: - The beagle and beaglexm models still do not support USB networking - There are some gcc 4.6 warnings about "variable set but not used" which have not yet been resolved; Ubuntu Oneiric's gcc makes these non-fatal, but if you're building with an upstream gcc 4.6 you may need to add the "--disable-werror" option to configure The source tarball is available at: https://launchpad.net/qemu-linaro/+milestone/2011.06 Binary builds of this qemu-linaro release are being prepared and will be available shortly for users of Ubuntu. Packages will be in the linaro-maintainers tools ppa: https://launchpad.net/~linaro-maintainers/+archive/tools/ More information on Linaro QEMU is available at: https://launchpad.net/qemu-linaro

14 years, 2 months

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Linaro GCC 4.6 and 4.5 2011.06 released

by Michael Hope

The Linaro Toolchain Working Group is pleased to announce the release of both Linaro GCC 4.6 and Linaro GCC 4.5. Linaro GCC 4.6 is the fourth release in the 4.6 series. Based off the latest GCC 4.6.0+svn174261, it adds new optimisations and vectoriser improvements. Interesting changes include: * Updates to 4.6.0+r174261 * Blocks can now vectorise into ORN and BIC instructions * Support for half word to double word multiply and accumulate operations * Better support for other widening multiply operations * Further performance improvements in NEON strided loads and stores * Performance improvements targeted at EEMBC CoreMark Fixes: * PR target/48454: Set the lengths correctly for the case with Quad vectors. Known issues: * Building Python 2.7 with -mfpu=neon exposes a bug in vmov.i64 in binutils 2.20.51. Please use 2.21 or later. The strided load/store improvements allow the vectoriser to efficiently access values that occur at every n'th address, such as all of the red values in a RGB image or all of the left channel samples in a interleaved audio array. For example, a plain C function that converts between RGB and CYMK now runs 7.3 x faster on an A9. Linaro GCC 4.5 2011.06 is the eleventh release in the 4.5 series. Based off the latest GCC 4.5.3+svn174250, it is a maintenance focused release. Interesting changes in 4.5 include: * Updates to 4.5.3+r174250 Fixes: * LP: #744754: ICE in reload_cse_simplify_operands, at postreload.c:402 with neon optimized code * LP: #748138: ICE in redirect_jump, at jump.c:1443 The source tarball is available from: https://launchpad.net/gcc-linaro/+milestone/4.6-2011.06-0 https://launchpad.net/gcc-linaro/+milestone/4.5-2011.06-0 Downloads are available from the Linaro GCC page on Launchpad: https://launchpad.net/gcc-linaro 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

14 years, 2 months

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Android 2.3.3 build failed using android preview toolchain

by Richard Zhao

Hi there, I tried to use android-toolchain-eabi-4.5-2011.05-0-linux-x86.tar.bz2 to enable hard float ABI. But it built failed on Android 2.3.3. Most errors are like address alignment issues. Did you have any patch for that? Successfully tested? Thanks Richard

14 years, 2 months

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[ACTIVITY] 6th - 10th June

by Andrew Stubbs

My testing for the widening multiplies patches came back clean. I've committed it upstream, and merged it to Linaro GCC 4.6. The testing for my Thumb2 constants patches failed (bootstrap failure on ARM), so can't commit that right away. The failure is a SIGSEGV in the stage 2 compiler building it's own libgcc. This is going to be tricky to pin down! Continued work on widening operations in the GCC middle-end. I now have it doing all the arbitrary width widening operations that I want. I've tested that it didn't do the wrong thing for just about all permutations of input and output types, but I've yet to do anything like a bootstrap test or anything. There's still quite a lot more work to do in tidying it up. ---- Upstream patched requiring review: * NEON scheduling patch http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01431.html

14 years, 2 months

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binutils-gold ld segfault when compiling chromium-browser

by Riku Voipio

Hi, binutils-gold is crashing while compiling chromium[1]. This was originally found on Debian[2], but affects ubuntu[3] as well. Also, regular, non-gold ld will segfault with null pointer reference on the same linking commands. testcase: # wget http://bugs.debian.org/cgi-bin/bugreport.cgi?msg=10;filename=allcodecs.o.xz… # unxz allcodecs.o.xz # sha1sum allcodecs.o f7c93a9132e4d02a651ade8db9f7b3f76918d236 allcodecs.o # ld.gold allcodecs.o ld.gold: internal error in value_from_output_section, at ../../gold/reloc.cc:1516 according to report, not reproducible inside qemu. [1] http://sourceware.org/bugzilla/show_bug.cgi?id=12771 [2] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=616715 [3] https://launchpadlibrarian.net/72379090/buildlog_ubuntu-oneiric-armel.chrom…

14 years, 2 months

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[ACTIVITY] Weekly status

by Revital Eres

Tracked a bootstrap failure with SMS flags on ARM machine exposed in recent trunk. Fixed and tested a patch for that. Tested another SMS patch following comments received from gcc ml@ (http://gcc.gnu.org/ml/gcc-patches/2011-05/msg02294.html) Following conversation with Micheal, added SPEC2006 analysis info to the benchmarks wiki page -https://wiki.linaro.org/Internal/ToolChain/Benchmarks Discussed with Ramana weird RTL pattern generated for thumb2_movhi_insn with -march=armv7-a -mthumb using trunk. Probably will open a PR for that.

14 years, 2 months

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[ACTIVITY] weekly status

by Ken Werner

Hi, * learning more on andoid (repo tool, some branches, the basics of the android build system) * finished to setup my environment to build the android sources * sucessfully build linaro-android using linaro gcc 4.4, 4.5 and 4.6 * tracked down the libgui.so linaro android issue to the apriori prelinker * workaround: disable prelinking for this module (patch -> linaro-dev) * I still don't understand what exactly is supposed to be prelinked and what's exactly causing the fail * Note: next Monday is a public holiday in Germany Regards Ken

14 years, 2 months

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[ACTIVITY] 2011-06-10

by David Gilbert

== String Routines == * Completed gathering the SPEC2k6 memcpy results, graphed them, sent them out * Gathered SPEC2k6 memset results, graphed them, sent them out == 64bit Atomics == * Modified gcc backend to do 64bit Atomic ops - the code looks good, but I've not done much testing yet. == Other == * Upstreamed a small ltrace patch Next week: Plan is to get gcc tests done and attack libgcc for the pre-v7 fallbacks (the tricky bit there is runtime deciding what to use) Also run spec and denbench for strlen and some other string routines

14 years, 2 months

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[Activity] Week 23 - week ending 10th June 2011.

by Ramana Radhakrishnan

== Progress == * Spent some time on the VFP moves and look at ivopts for a bit. Analysing a couple of options here. * Committed the DImode moves patch upstream. * Fixed PR49335 where GCC was generating rsb ip, sp, ip lsl #2 * Proposed a fix for PR48454 (finally being able to reproduce it) - was a case of a missing length attribute for vec_pack_trunc. * Investigated some regressions in v1 of a popular embedded benchmark - leads to BRANCH_COST tuning. * Merged by neon-vorn-vbic patch into linaro-gcc :4.6 == Plans == * Spend some time on the VFP moves and look at ivopts for a bit. * Merge the fix for lengths to linaro-gcc:4.6 and 4.5 if applicable. * Merge fix for PR49335 to linaro-gcc:4.5 and 4.6 . * Find some time for some upstream patch review. * T2 performance review meeting/ Meetings: * 1-1s * TCWG call.

14 years, 2 months

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[ACTIVITY] report week 23

by Peter Maydell

RAG: Red: Amber: Green: USB kbd+mouse finally working on QEMU beagle model Current Milestones: || || Planned || Estimate || Actual || ||qemu-linaro-2011-06 || 2011-06-16 || 2011-06-16 || || Historical Milestones: ||finish qemu-cont-integn || 2011-01-25 || 2011-01-25 || handed off || ||first qemu-linaro release || 2011-02-08 || 2011-02-08 || 2011-02-08 || ||qemu-linaro 2011-03 || 2011-03-08 || 2011-03-08 || 2011-03-08 || ||qemu-linaro 2011-04 || 2011-04-21 || 2011-04-21 || 2011-04-21 || ||qemu-linaro 2011-05 || 2011-05-19 || 2011-05-19 || n/a || ||close out 1105 blueprints || 2011-05-28 || 2011-05-28 || 2011-05-19 || ||complete 1111 planning || 2011-05-28 || 2011-05-28 || 2011-05-27 || == upstream-omap3-patches == * started on disentangling the patchstack: submitted patches upstream for a few standalone fixes. First few steps in a big job... == omap3-usb-model == * added QEMU's USB OHCI model to the omap3/beagle, and (after some debugging and submitting a couple of OHCI bugfixes upstream) got USB keyboard and mouse working == linaro-qemu-11.11 == * rebased on master and identified gcc 4.6 compiler patches we need == other == * added and tested patches for an overo board model * added Beagle board support for returning EDID data from a fake monitor so the kernel will actually turn the display on * discussions about Android emulator (which looks likely to take the upstreamed ARMv7 translator with the fixes we've worked on over the last six months) * office move * QEMU 0.15 is not too far in the future: need to make sure all the ARM stuff we want is in it Meetings: standup, GSoC student, Christoffer Dall (working on KVM for ARM) Current qemu patch status is tracked here: https://wiki.linaro.org/PeterMaydell/QemuPatchStatus Absences: 1-5 August: Linaro sprint 1111 (maybe) 15-16 August: QEMU/KVM strand at LinuxCon NA, Vancouver [LinuxCon proper follows on 17-19th]

14 years, 2 months

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[ACTIVITY] June 5-9

by Ira Rosen

Hi, - vectorization of widening multiplication of unsigned types and constants - committed to mainline - fix vectorizer testsuite failures on ARM - submitted - testing a patch to fix a bug in the vectorizer revealed by the widen-mult patch - testing a patch to fix bad peeling heuristic that causes gcc.dg/vect/vect-72.c to fail on ARM Ira

14 years, 2 months

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Toolchain continious build write-up

by Michael Hope

I've done a quick write-up on the (almost) continious builds done in the toolchain group: https://wiki.linaro.org/WorkingGroups/Builds It's high level and includes things like what branches we watch, how often they get built, where the results go, and how things like testsuite results are shared. This is in follow up to the email on testsuite diffs yesterday. -- Michael

14 years, 2 months

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