- linaro-toolchain - lists.linaro.org

by Peter Maydell

Current Milestones: || || Planned || Estimate || Actual || ||cp15-rework || 2012-01-06 || 2012-04-10 || || Historical Milestones: ||initial-a15-system-model || 2012-01-27 || 2012-01-27 || 2012-01-17 || ||qemu-kvm-getting-started || 2012-03-04?|| 2012-03-04?|| 2012-02-01 || == cp15-rework == * completed last of the register conversions, started on the final check-through and polish before it goes out to the mailing list * implemented changes following review of the clean-up-reset patchset == other == * qemu-linaro 2012.04 final testing (confirming an audio issue on the vexpress model LP:977610 wasn't a regresion) and release * patch review: pl330 dma controller model * patch review: samsung's sd card model overhaul * minor patch: fix compile failure on bsd * minor patch: fix failure to reset timer on a9 mptimer reset * minor patch: diagnose attempts to use python3 at configure time * sent arm-devs.next pullreq * put together a bug report in the form of a youtube video (!) as requested by the gmail folks -- PMM

13 years, 6 months

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[ACTIVITY] Apr 11 - Apr 13

by Ulrich Weigand

== GCC == * Committed fix for LP #968766 (PR tree-optimization/52880) to FSF mainline and Linaro GCC 4.6 and 4.7. * Created merge reqest to fix LP #972648 for Linaro GCC 4.6 by backporting mainline patch; pending approval. * Updated patch to use vld1.64/vst1.64 instead of vldm/vstm for vector moves. Testing detected problems in GCC core memory alignment logic (GCC assumes vector types are naturally aligned, which contradicts ARM ABI and ARM back-end assumptions). Started discussion on possible fixes. * Updated and retested patch to use vld1/vst1 to implement vec_set/vec_extract for cases where the scalar operand resides in memory. * Ongoing work on fixing LP #959242. * Ongoing work on improving end-of-loop value computation. 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, 6 months

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Linaro GDB 7.4 2012.04 released

by Thiago Jung Bauermann

The Linaro Toolchain Working Group is pleased to announce the release of Linaro GDB 7.4 2012.04. Linaro GDB 7.4 2012.04 is the second release in the 7.4 series. Based off the latest GDB 7.4, it includes a number of ARM-focused bug fixes and enhancements. Interesting changes include: * gdbserver can now be compiled with Android's toolchain. * Additional fixes from the GDB 7.4 branch, one of them being that it doesn't require makeinfo to build anymore. The source tarball is available at: https://launchpad.net/gdb-linaro/+milestone/7.4-2012.04 More information on Linaro GDB is available at: https://launchpad.net/gdb-linaro -- []'s Thiago Jung Bauermann Linaro Toolchain Working Group

13 years, 6 months

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[ANNOUNCE] Linaro QEMU 2012.04 released

by Peter Maydell

The Linaro Toolchain Working Group is pleased to announce the release of Linaro QEMU 2012.04. Linaro QEMU 2012.04 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: - ppoll syscall now supported in ARM linux-user mode - the SETEND instruction in the Thumb encoding now UNDEFs to match behaviour for the ARM encoding - the OMAP36xx UART FIFO status registers are now implemented (thanks to Jan Vesely) Known issues: - Graphics do not work for OMAP3 based models (beagle, overo) with 11.10 Linaro images. - Audio may not work on Versatile Express models with the latest Linaro kernel/hardware packs (LP:977610). The source tarball is available at: https://launchpad.net/qemu-linaro/+milestone/2012.03 More information on Linaro QEMU is available at: https://launchpad.net/qemu-linaro

13 years, 6 months

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[ANNOUNCE] Linaro GCC 4.7 and 4.6 2012.04 released

by Michael Hope

The Linaro Toolchain Working Group is pleased to announce the 2012.04 release of both Linaro GCC 4.7 and Linaro GCC 4.6. Linaro GCC 4.7 2012.04 is the first release in the 4.7 series. Based off the latest GCC 4.7.0+svn186061 release, it includes performance improvements especially around 64 bit operations. Interesting changes include: * Our first 4.7 based release * Updates to GCC 4.7.0+svn186061 * Better use of 16 bit Thumb-2 instructions for smaller code size * Implements 64 bit ones complement in NEON * Adds support for the ARMv6 saturation instructions * Backports the NEON lexer improvements for faster compilation * Backports the 64 bit multiply, divide, and mod improvements Fixes: * LP: #960283 slp pass assert when compiler configure with --enable-checking Linaro GCC 4.6 2012.04 is the fourteenth release in the 4.6 series. Based off the latest GCC 4.6.3+svn186060 release, this is the first release after entering maintenance. Interesting changes include: * Updates to 4.6.3+svn186060 Fixes: * LP: #960283 slp pass assert when compiler configure with --enable-checking The source tarballs are available from: https://launchpad.net/gcc-linaro/+milestone/4.7-2012.04 https://launchpad.net/gcc-linaro/+milestone/4.6-2012.04 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/4.7/4.7-2012.04 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, 6 months

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O2 optimization with vectorize

by Singh, Ravi Kumar (Ravi)

All, In the below code, I tried few compiler options and got following observations: 1) arm-linux-gnueabi-gcc -O2 -mcpu=cortex-a15 -mfpu=neon -ftree-vectorizer-verbose=6 -ftree-vectorize Compiler throws following info messages: foo.c:16: note: not vectorized: unsupported use in stmt. foo.c:16: note: not vectorized: unsupported use in stmt. foo.c:18: note: not vectorized: unsupported use in stmt. foo.c:18: note: not vectorized: unsupported use in stmt. 2) -O2 -mcpu=cortex-a15 -mfpu=neon None of the generated code contains the NEON instructions. Code generated with case 1 is taking 3000 cycles, and code generated by option 2 is taking 2500 cycles. Even if vectorization failed in case1, it should not generate more inefficient code than case 2. My belief was that the executables from both would take same cycles, any thing done for doing unsuccessful vectorization must be reverted if it did not succeed. ################################################################### #define SIZE1 20 #define SIZE2 26 unsigned int array[SIZE1][SIZE2]; void foo() { unsigned int i,j; unsigned int max = 0; for(i = 0; i < SIZE1; i++) { for(j = 0; j < SIZE2; j++) { if (array[i][j] > max) { max = array[i][j]; index = j; } } } printf("Max value: %u Index: %u\n", max, index); } Regards RKS

13 years, 6 months

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2012.04 release prep

by Michael Hope

Hi there. The 2012.04 toolchain release is this week. Ulrich, I see your fix for LP: #968766 has been approved upstream. In theory it's too late but I'm happy to land it if you are. Could you decide and let Andrew know by the middle of Tuesday? Andrew, if you don't hear from Ulrich then spin away. Andrew, could you run the release process on Tuesday please? There's one extra step this month: once you've uploaded and spawned the job, go to the scheduler screen and click on 'Release' beside each of the ursas. I reserved them to make sure they'd be idle and ready to pick up the release build when ready. Thiago, let us know if Ulrich or I can lend a hand with the GDB release. -- Michael

13 years, 6 months

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Changing the time of the fortnightly performance call

by Ramana Radhakrishnan

Hi there, At the last call Michael asked if we could push this call back by 30 minutes given the changes due to daylight savings. Does anyone have any objections to a new time of 10 a.m. BST - 11 a.m. Central European - 9 p.m. New Zealand. ? cheers Ramana

13 years, 6 months

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[ACTIVITY] 2nd - 5th April

by Andrew Stubbs

* GCC Identified the latent bug that's upset my NEON-shifts testing. It turns out the define-insn-and-shift patterns in arm/sync.md have no length attributes set. Now that the NEON 64-bit shifts appear to be not broken, I've relaunched the 64-bit extend testing. Identified the problem with my NEON-64-bit-negate patch: I already knew it works better (produces more optimal code) with my NEON-immediates patch, but it turns out that at -O0 the other patch is a hard requirement or else bad things happen in output_move_vfp. Backported Ramana's patch for ARM-mode testing of my recent Thumb 64-bit test cases. I've applied it to Linaro GCC directly, without a merge proposal, as it's a very low-risk patch. Caught up with some launchpad blueprint fiddling. Completed the merges from 4.6 and 4.7 FSF. The 4.7 merge was tricky as it required working around a BZR bug; I've posted the workaround to the toolchain list. * Other On leave on Tuesday Public holiday on Friday. Attached a copy of the ARM Linux ABI document to KBentry 39 so we're hosting it somewhere, at least. Posted an internal Mentor/CS question about getting its old home restored, and getting a relicensed edition to allow others to use it as the basis for a hard-float equivalent.

13 years, 6 months

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[Activity] Week 14

by Ramana Radhakrishnan

=== Progress === * Worked on VFP addressing patch and corrected the failures. * Got SPEC2k up and running with hot cold partitioning. Some SEGVs that need investigation. In general results appear to be better in quite a few cases. * Investigated an issue with a merge request for upstream 4.7 branch into our tree. There was a testsuite failure and I wasn't able to reproduce it with a local i386 rebuild of the toolchain. Therefore we'll have to let this go in. == Plans == * I will be away for 2 days this week attending the LLVM conference in London. * Pursue backporting gnu_unique_object upstream. * Finish off the VFP addressing modes patch upstream. * Look at some of the existing blueprints and start discussions around prioritizing this. * Investigate some of the SEGVs with h-c partitioning. Absences. * Apr 12-13 : Euro-LLVM London. * Linaro Connect Q2.12 - May 28 - June 1 -

13 years, 6 months

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[Activity] Week 14

by Zhenqiang Chen

Summary: * Revise the patch for relocatable NLS support. * Code size benchmark analysis. Details: 1. Revise the patch for relocatable NLS support: lp:918926. * Read the gcc configure and makefile. * It seams hard to get the relative dir if the gcc is configured with --bindir=... --datadir/datarootdir. E.g. --bindir=/opt/bin --datarootdir=/tmp/data 2. Code size benchmark analysis with -Os * Investigate regression in small cases. 3. Try to build linaro gcc trunk with crosstool-ng. But it reports error when configuring libquadmath. * configure:9829: error: Link tests are not allowed after GCC_NO_EXECUTABLES. * Manual check or a simple case show libc.so can be linked. Plans: * Tuning optimization heuristics for -Os Planed leaves: * April 9 - 11: Vacations Best regards! -Zhenqiang

13 years, 6 months

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[ACTIVITY] report week 14

by Peter Maydell

Current Milestones: || || Planned || Estimate || Actual || ||cp15-rework || 2012-01-06 || 2012-04-10 || || Historical Milestones: ||initial-a15-system-model || 2012-01-27 || 2012-01-27 || 2012-01-17 || ||qemu-kvm-getting-started || 2012-03-04?|| 2012-03-04?|| 2012-02-01 || == other == * LP:970252 got a beagle board booting so I could read the UART version register; reviewed and applied to qemu-linaro the set of patches provided by Jan Vesely (thanks!) * sent a patchset cleaning up the GIC model so it is a self-contained sysbus device; this should make it easier to just drop in a functionally equivalent device which is a shim for an in-kernel GIC model that uses the hardware VGIC features * upstream review: save/load support for sd.c [patchset from Samsung] SPI bus [patchset from Petalogix] * put together qemu-linaro prerelease tarball and did some testing * performance evaluation finished and submitted

13 years, 6 months

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[ACTIVITY] 26th - 30th March

by Andrew Stubbs

Continued work on neon 64-bit correctness. This is really dragging out now. I had hoped to have had it fixed by now, but subtle bugs are subtle. The 16-bit opcodes patch is now committed both upstream and in Linaro GCC 4.7, however, so that's some progress at least. Posted benchmark results for the the 64-bit shifts in core registers. The results are inconclusive: the benchmark runs are too noisy.

13 years, 6 months

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Binary build release process

by Michael Hope

As part of closing out the Windows toolchain card, I've documented the binary build release process at: https://wiki.linaro.org/WorkingGroups/ToolChain/BinaryBuild/ReleaseProcess The interesting thing is a script that pulls builds from S3 and posts them to Launchpad. There's a curl command at the end that does the upload and might be useful. -- Michael

13 years, 6 months

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Re: [Linaro-toolchain-builds] [cbuild] eglibc-2.16~svn17843 armv7l completed

by Michael Hope

On 1 April 2012 05:56, Ramana Radhakrishnan <ramana.radhakrishnan(a)linaro.org> wrote: > I find it a bit worrying that all the nptl tests are failing with a > common error message > > http://builds.linaro.org/toolchain/eglibc-2.16~svn17843 > > Aborted' > make[6]: *** [/scratch/cbuild/slave/slaves/tcpanda05/eglibc-2.16~svn17843/eglibc/default/build/nptl/tst-cond7.out] > Error 1 > libgcc_s.so.1 must be installed for pthread_cancel to work > Didn't expect signal from child: got `Aborted' > > Why don't we have libgcc_s.so.1 installed on the system - shouldn't > that be there if there was a gcc properly installed on the system ? This is a bug on my side. I believe EGLIBC likes to have libgcc_s.so in the top of the build directory - at least that's the impression I got from reading the cross-test documentation the other day. I've logged LP: #971064 and will look into it. -- Michael

13 years, 6 months

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GCC 4.7 runtime library plans

by Michael Hope

Hi Ricardo, Matthias. GCC 4.7 is almost here and it's likely that Linaro GCC 4.7 will come out for next month's 2012.04 milestone. For the binary toolchain to work we need the 4.7 runtime libraries on the target. Matthias, what are your plans? How much of 4.7 is packaged so far? Ricardo, could we pull these updates to libgcc, libstdc++, and others into the LEB? These should be backwards compatible but there's always a risk. Using the 4.5 runtime with a 4.4 compiler back on Maverick was OK. -- Michaele

13 years, 6 months

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[ACTIVITY] March 26 - March 30

by Thiago Jung Bauermann

Hi, GDB for Android: * Submitted upstream three patches for building gdbserver on Android. Reworked two of them based on review comments, and committed one. * Investigated ARM EABI build attributes and .note.ABI-tag as ways of marking binaries as Android apps so that GDB can differentiate them from regular Linux ARM binaries. Build attributes are quite sophisticate and overkill for this purpose, and would also be out of place for Android on x86. .note.ABI-tag is simpler and more appropriate. Now experimenting with generating the .note.ABI-tag section on Android binaries. * Tried to find ARM GNU/Linux ABI supplement [1] but couldn't, contacted Mentor Graphics' webmaster about the problem. No response so far. Obs: This Friday (04/06) will be a holiday in Brazil and hopefully I will be AFK. [1] http://www.codesourcery.com/gnu_toolchains/arm/arm_gnu_linux_abi.pdf -- []'s Thiago Jung Bauermann Linaro Toolchain Working Group

13 years, 6 months

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[ACTIVITY] Mar 26 - Mar 30

by Ulrich Weigand

== GCC == * Committed fix for LP #960283 (PR tree-optimization/52686) to FSF mainline as well as Linaro GCC 4.6 and 4.7. * Worked on patch to use vld1.64/vst1.64 instead of vldm/vstm for vector moves. Created merge request for testing. * Worked on patch to use vld1/vst1 to implement vec_set/vec_extract for cases where the scalar operand resides in memory. Created merge request for testing. * Ongoing work on fixing LP #959242. * Ongoing work on improving end-of-loop value computation. == Misc == * I'll be attending the Linux Foundation Collaboration Summit in San Francisco next week, and present on "GDB on ARM". 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, 6 months

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[Activity] Week 13

by Zhenqiang Chen

Summary: * Linaro binary toolchain 2012.03 release. * Investigate relocatable NLS support. * Code size benchmark analysis. Details: 1. Linaro binary toolchain 2012.03 release. * Bump and spawn 2012.02-20120326 build. * Validate the release candidate. * Update wiki for binary build tasks. 2. Investigate relocatable NLS support: lp:918926. * Root cause: gcc and binutils use a fixed LOCALEDIR (which is $prefix/share/locale) to call bindtextdomain. * Workout a reference patch for gcc to use relative dir (.../bin/../share/locale) to call bindtextdomain. 3. Code size benchmark analysis with -Os * Collect code size benchmark data. * In most cases, gcc 4.7 gets better result than gcc 4.6. * Investigate regression in several small cases. 4. Read the tree and rtl dump files to learn the optimizations and impacts on code size. Plans: * Fix lp:918926. * Investigate code size regression in gcc 4.7. * Tuning optimization heuristics for -Os. Planed leaves: * April 2 - 4: Chinese Qingming Festival. * April 9 - 11: Vacations Best regards! -Zhenqiang

13 years, 6 months

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[Activity] Week 13

by Ramana Radhakrishnan

=== Progress === * Caught up on email backlog. * Reworked the ARM backend specific bits of the VFP addressing modes patch and submitted again for some benchmarking and testing. Finished the PRE_MODIFY and POST_MODIFY bits of that as well. * Wrote up a small blueprint on the shrink-wrapping work. * Wrote up my Linaro performance review and sent it for review. * Looked at lower-subreg work that Kenneth Zadeck posted very quickly to see if it addressed some of the issues around and old intrinsics patch that Richard Sandiford submitted last year. It looks promising and might even have some impact on our 64 bit neon work . It fixes the 2 cases where things didn't look good. ( Upstream bug reports PR48941 and PR51980) but it falls over while building glibc. Sent a bug report to Kenneth about this. * The perf packages on OMAP4 in our latest releases from 12.03 are just broken, they don't work. Reported the issue to Paul Larson on IRC to check what's going on. perf top doesn't work reliably on the kernels and there appears to be some issues with interrupt support for some of these . I specifically ran into https://bugs.launchpad.net/ubuntu/+source/linux-ti-omap4/+bug/956693 . * Answered a few questions from Uli about my prototypes for the vld1 replacing vldm instructions and a vget_lane patch. == Plans == * Work through some of the blueprints before the call next week. * Set up perf on my panda. It works on my AC100 - so the inclination was to also have something that worked on my panda but clearly it doesn't. * Finish off the VFP addressing modes patch and get it in. * Look at Partial Partial PRE next or attempt the next project. Absences. * Apr 12-13 : Euro-LLVM London. * 1 week holiday sometime before that - to be booked * Linaro Connect Q2.12 - May 28 - June 1 - travel booked - hotel to be booked.

13 years, 6 months

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[ACTIVITY] report week 13

by Peter Maydell

Current Milestones: || || Planned || Estimate || Actual || ||cp15-rework || 2012-01-06 || 2012-04-10 || || Historical Milestones: ||initial-a15-system-model || 2012-01-27 || 2012-01-27 || 2012-01-17 || ||qemu-kvm-getting-started || 2012-03-04?|| 2012-03-04?|| 2012-02-01 || == cp15-rework == * posted 14-patch patchset which creates a QOM class per CPU type and moves a lot of the reset/constant-feature-register setup to the init functions for these new classes. This is then a much nicer base to sit cp15 rework on. * solved the final design knot of how to handle registers whose reset value depends on the CPU type (the QOM patches make this much more straightforward) == other == * upstream patch review * updated Paul Brook's BE8 userspace support patch and sent out a v2 * ran through qemu-linaro buglist identifying fixes to go into next release * linaro performance review ate up a lot of time this week and will probably do so next week too :-(

13 years, 6 months

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Shrink wrapping blueprint.

by Ramana Radhakrishnan

I've written up a blueprint for Shrink-wrapping here. https://blueprints.launchpad.net/gcc-linaro/+spec/shrink-wrapping Comments are welcome. Ramana

13 years, 6 months

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Agenda for performance call on April 3.

by Ramana Radhakrishnan

https://wiki.linaro.org/WorkingGroups/ToolChain/Meetings/2012-04-03 If there's anything people would like to add please do so on the wiki page. Ramana

13 years, 6 months

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Agenda for Monday

by Michael Hope

...is up at: https://wiki.linaro.org/WorkingGroups/ToolChain/Meetings/2012-04-02 Feel free to add items. Andrew, could you look into the 4.7 bzr merge problem before then? -- Michael

13 years, 6 months

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4.7 is now the Launchpad dev focus

by Michael Hope

I've changed the development focus in the Launchpad project to Linaro GCC 4.7. This means that: * Checking out lp:gcc-linaro now gives you the 4.7 branch * New merge requests are targeted to 4.7 by default This doesn't affect any already checked out branches or pending merge requests. -- Michael

13 years, 6 months

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