- linaro-toolchain - lists.linaro.org

[ACTIVITY] 29 December 2014 - 2 January 2015

by Will Newton

== Progress == * Holiday Monday to Wednesday (6/10) * Public holiday Thursday (2/10) * Catch up on email (1/10) * LLD for AArch64 (1/10, TCWG-563) - Rebased, tidied up and submitted error handling patch == Issues == * None == Plan == * Figure out how to get a native ILP32 toolchain * More LLD work -- Will Newton Toolchain Working Group, Linaro

11 years, 4 months

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[ACTIVITY] Week 1

by Renato Golin

== Progress == 1 day week: * Automation Framework (CARD-1378 1/2) - Resetting APMs and Junos that fell during the holidays * Release 3.5.1 (TCWG-477 1/2) - Testing RC2, all good == Plan == * improve buildbots (swap, verbose, libs) * fix libc++abi NEON/VFPv3 unwinder * purchase new builder, prepare lab for it

11 years, 4 months

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[ACTIVITY] 29 Dec 2014- 2 Jan 2015

by Venkataramanan Kumar

= Progress == * TSAN support for Aarch64 (3/10) * Fix Bug 863(Linaro)/ 63949(FSF) (3/10) * Emails, meetings. (2/10) 1-1 with maxim. Leave on 31-Dec-2014 == Plan == * TSAN support for Aarch64. * Fix Linaro Bug 863

11 years, 4 months

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[ACTIVITY] 15-19th December 2014

by Prathamesh Kulkarni

== This week == * GCC Modularization Project - started working on flattening rtl.h - submitted expr.h flattening patch upstream for review. - worked with Michael on tree.h flattening patch. == Next week == - investigate bug 905 - modify expr.h, cfgloop.h patches to avoid conflicts with Michael's tree.h flattening patches and submit upstream.

11 years, 4 months

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[ACTIVITY] 15-19 December 2014

by Christophe Lyon

== Progress == * 2015.01 release - reviewed Yvan's backports * GCC trunk/4.9 monitoring (2/10) - still tracking cause of random "interrupted system call" errors * AArch64 sanitizers (1/10) - LLVM+compiler-rt build seems OK, but still unable to run the tests on Juno * Neon intrinsics tests (3/10) - continued conversion to GCC testsuite - fixed checks for Neon QC flags - patch reviews * Misc (4/10) - meetings, conf-calls, emails, .... == Next == * GCC trunk/4.9 monitoring * AArch64 sanitizers * Neon intrinsics tests * cbuild2/abe: look at backport and tcwgweb On holiday until January 5h

11 years, 4 months

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[ACTIVITY] 15th - 19th December

by Bernie Ogden

ABE benchmarking automation - TCWG-360 [6/10] * TCWG/LAVA lab interactions working with just a couple hacks * Jenkins job created (thanks Rob) and beginning to work Misc - [4/10] * Included a quick look at Will's single-thread performance patches - unfortunately, no time to actually do anything with them =Plan= Benchmarking storage/automation Look though Will's single-thread performance patches Switch to TCWG Junos Write up/think about where to go next with libm exercising Test benchmark repeatability =Absences= On holiday Monday 22nd Dec to Friday 2nd Jan

11 years, 4 months

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[ACTIVITY] Week 51

by Renato Golin

== Progress == * Friday off * Automation Framework (CARD-1378 2/8) - Writing up best practices, lab structure, etc - Removing port forwards, private keys from the lab - IT ticket to remove tcwg-sysadmin from public git * Toolchain (CARD-862 1/8) - Fixed compiler-rt problem on AArch64 build - Fixing libcxxabi problem on ARM unwind * Release 3.5.1 (TCWG-477 1/8) - Finished RC1 testing on ARM and AArch64 * Buildbots (TCWG-76 2/8) - Found commit that broke lnt bot, green again - Setting up internal bots (4 ARM, 1 ARM64) * Background (2/8) - Code review, meetings, discussions, etc. == Plan == * Continue 3.5.1 release (RC2, etc) * Fix a few remaining problems with Compiler-RT / libc++abi Holiday until January...

11 years, 4 months

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[ACTIVITY] 15 - 19 December 2014

by Will Newton

== Progress == * Holiday Thursday and Friday (4/10) * LLD for AArch64 (2/10, TCWG-563) - Completed patch to improve relocation range checking - llvm mailing lists down so no reviews happening * ILP32 work (3/10) - Several test builds on Juno, still cannot get a working native toolchain * Email, meetings, other stuff (1/10) == Issues == * Cable power level issue causing broadband problems == Plan == * On holiday until in January, but I will check email periodically -- Will Newton Toolchain Working Group, Linaro

11 years, 4 months

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[ACTIVITY] 8 - 12 December 2014

by Omair Javaid

== Progress == QEMU kernel debugging setup [3/10] [TCWG-568] -- Finally figured out the steps to debug kernel with ARM cortex A9 core. Kernel debugging to investigate limitation of ARM watchpoint implementation [2/10] [TCWG-569] -- Debug kernel code with gdb to investigate problems. Miscellaneous [1/10] -- Meetings, Emails etc -- Wiki updates Sick Leave [4/10] == Plan == QEMU kernel debugging setup [TCWG-568] -- Figure out steps to debug kernel with ARM cortex A15 core. More Kernel debugging to investigate limitation of ARM watchpoint implementation [TCWG-569] -- Get A15 core running on QEMU and debug kernel hw debug implementation on both A9 and A15. Updates to GDB wiki pages with kernel debugging howto.

11 years, 4 months

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renaming completed

by Rob Savoye

I've completed renaming Cbuildv2 to Abe, as well as modifying all the board files for remote testing to match what the new DNS server is using. Please stop using the existing cbuild2 repository, as all changes are now done in the new repository. I'll leave the old repository for a while, I know there are branches there people depend on. For those, I'm sorry for the pain (having just gone through that myself), but please migrate any important branches to the new repository. URLs for that are here: https://git.linaro.org/toolchain/abe.git - rob -

11 years, 4 months

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[ACTIVITY] 8th - 12th December

by Bernie Ogden

ABE benchmarking - TCWG-360 [7/10] * Finished post-move LAVA lab workarounds * Should be flexible enough for TCWG lab too, but we'll see * Refactored sources - now more robust and maintainable lowlevellock.h comments - CARD-341 [1/10] * A further round of changes, got an OK Raised a bug on GCC re questionable generation of pow calls - TCWG-558 [0/10] * Upstream fixed it really fast Misc - [2/10] =Plan= Switch to TCWG Junos, perhaps start using gprof Think about where to go next with libm exercising Look though Will's single-thread performance patches Test benchmark repeatability Port benchmarking scripts to ABE repo Start on storage/automation, if Rob has time =Absences= On holiday Monday 22nd Dec to Friday 2nd Jan

11 years, 4 months

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[ACTIVITY] Week 50

by Yvan Roux

== Issues == * none. == Progress == * GCC 4.9 2014.12 (2/10) - Released * Bugzilla #902 (ICE in split_reg on armeb-linux-gnueabihf) (6/10) - reduced test case - identified the commit that introduced the bug - identified the trunk revision that fixed it which is not backportable on our branch as it * Misc: (2/10) - Revisions management script - Various meetings. == Plan == * Bugzilla #902 * List the backports needed for 2015.01 * Libunwind

11 years, 4 months

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[Weekly] 08-12 DEC 2014

by Michael Collison

== This week == * GCC Modularization Project (9/10) - Flattening header files - Submitted tree-core.h, and tree.h patches for review - Successfully tested on platforms listed in config-list.mk - Reviewed and tested patches from Prathamesh * Misc (1/10) - Conference calls == Next week == - Work on backports and bug fixes

11 years, 4 months

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[ACTIVITY] 8- 12 December 2014

by Venkataramanan Kumar

= Progress == * TSAN support for Aarch64 (6/10) Working on writing Aarch64 specific "internal_clone" function. * Emails, linaro/AMD status meetings. (4/10) 1-1 with maxim, Christophe. == Plan == * TSAN support for Aarch64. * Fix Linaro Bug 863 AMD internal event on 18th (full day)

11 years, 4 months

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[ACTIVITY] 8 - 12 December 2014

by Kugan

== Progress == * Compiler-pass to widen computation to back-end promoted mode (2/10) - Looking at generated code with benchmarks - some benchmark analysis with coremark * https://cards.linaro.org/browse/TCWG-486 (3/10) - Reviewed Zhenqiang's and Dmitry's patches and experimented - I have at lease one case which is not working with Zhenqiang's patch * MISC (1/10) - Scanned gcc-patches and bug database * Holiday (4/10) == Planned Leave == * 11/12/2014 to 24/12/2014

11 years, 4 months

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[ACTIVITY] 8-12 December 2014

by Prathamesh Kulkarni

== This week == * GCC Modularization project: - Completed flattening df.h. - Completed testing cfgloop.h on all targets in config-list.mk - Completed flattening expr.h. == Next week == - Modify df.h flattening patches based on Michael's review. - Start working on flattening rtl.h.

11 years, 4 months

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[ACTIVITY] Week 50

by Renato Golin

== Progress == * Automation Framework (CARD-1378 5/10) - Getting around fastboot issues on Dragon - Upgrading Dragons to 3.17 / utopic - Testing stability of Dragon boards once again - Writing best practices, and lab setup documents - Liaising with ST and Qualcomm to stress their boards * Buildbots (TCWG-76 2/10) - Investigating AArch64 compiler-rt issue - Bisecting test-suite bot failure * Release 3.5.1 (TCWG-477 1/10) - Running validation on ARM and AArch64 * Background (2/10) - Code review, meetings, discussions, etc. - Helping Christophe and Will with LLVM stuff == Plan == - Finish 3.5.1 validation - Continue investigating test-suite failure - Follow up on AArch64 compiler-rt issue - Lab stuff for sure...

11 years, 4 months

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[ACTIVITY] 8 - 12 December 2014

by Will Newton

== Progress == * Off sick Monday (2/10) * LLD for AArch64 (4/10, TCWG-563) - Commited a few patches for reloc tests - Working on a patch to improve relocation range checking * ILP32 work (3/10) - Merged gettext 0.19.3 into glibc. This should fix build failures with bison 3.x - Various test builds on Juno * Email, meetings, reading docs etc. (1/10) == Issues == * None == Plan == * Submit LLD relocation range checking patch * Tidy up loose ends from gettext merge * Figure out why native ILP32 toolchain build fails -- Will Newton Toolchain Working Group, Linaro

11 years, 4 months

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[ACTIVITY] 8-12 December 2014

by Christophe Lyon

== Progress == * GCC trunk/4.9 monitoring (1/10) - still tracking cause of random "interrupted system call" errors - flagged a few wrong new Neon testcases * AArch64 sanitizers (1/10) - documented build process (based on configure) works on aarch64, but still unable to run the sanitizer tests - using supposedly up-to-date but undocumented build process (cmake) fails when configuring sanitizers libs - started discussion with upstream, no progress yet * Neon intrinsics tests (3/10) - continued conversion to GCC testsuite - checks for Neon QC flags need fixing * Misc (5/10) -meetings, conf-calls, emails, .... == Next == * GCC trunk/4.9 monitoring * AArch64 sanitizers * Neon intrinsics tests * cbuild2/abe: look at backport and tcwgweb

11 years, 4 months

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[ANNOUNCE] Linaro GCC 4.9 2014.12

by Yvan Roux

The Linaro Toolchain Working Group (TCWG) is pleased to announce the 2014.12 release of the Linaro GCC 4.9 source package. Linaro GCC 4.9 2014.12 is the ninth Linaro GCC source package release. It is based on FSF GCC 4.9.3-pre+svn218412 and includes performance improvements and bug fixes. With the imminent release of ARMv8 hardware and the recent release of the GCC 4.9 compiler the Linaro TCWG will be focusing on stabilization and performance of the compiler as the FSF GCC compiler. The Linaro TCWG provides stable[1] quarterly releases and monthly enginering[2] releases. Interesting changes in this GCC source package release include * Updates to GCC 4.9.3-pre+svn218412 * Backport of [AArch64] arm_neon.h - add vpaddd_f64, vpaddd_s64, vpaddd_u64 intrinsics * Backport of [AArch64] Move some code around in aarch64_expand_mov_immediate * Backport of [AArch64] Improve codegen of vector compares inc. tst instruction * Backport of [AArch64] Remove vector compare/tst __builtins * Backport of [AArch64] Add execution tests of vget_low and vget_high * Backport of [AArch64] Replace temporary inline assembler for vget_high * Backport of [AArch64] PR 61749: Do not ICE in lane intrinsics when passed non-constant lane number * Backport of [AArch32] Disable xordi3-opt.c/iordi3-opt.c on thumb1 target * Backport of [AArch64] Fix scan-assembler test false alarm on aarch64-linux-gnu * Backport of [AArch64] Add test of vld[234]q? intrinsic * Backport of [AArch64] Extend test of vld1+vst1 intrinsics to cover more variants * Backport of [AArch64] Add a test of vldN_dup intrinsics * Backport of [AArch64] Add a test of the vldN_lane intrinsic * Backport of [AArch64] Add a test of the vst[234](q?) intrinics * Backport of [AArch64] Add execution test of vset(q?)_lane intrinsics. * Backport of [AArch64] Add cost handling of CALLER_SAVE_REGS and POINTER_REGS * Backport of [AArch64] Fix cost for Q register moves * Backport of [AArch64] Add regmove_costs for Cortex-A57 and A53 * Backport of [AArch64] Add aarch64 to list of targets that support gold * Backport of [testsuite] whole_vector_shift * Backport of [testsuite] vect-reduc-or * Backport of [testsuite] Fix race in libstdc++ testsuite * Backport of [testsuite] update testcases for GNU11 * Backport of [testsuite] fix gcc-dg-prune glitch when filtering "relocation truncation" error * Backport of [testsuite] Update testcases for GNU11 * Backport of [testsuite] fix wrap_compile_flags * Backport of Increase PARAM_MAX_COMPLETELY_PEELED_INSNS when branch is costly * Backport of Add -mthunderx option * Backport of Accept cortex-m7/fpv5-sp-16/fpv5-d16 * Backport of Remove unused variable and marco * Backport of Target Legitimize Address * Backport of Hookize and remove *_BY_PIECES_P * Backport of Remove no-longer-needed fp-bit target macros. * Backport of Fix CLZ_DEFINED_VALUE_AT_ZERO for vector modes * Backport of ifcvt: Allow CC mode if HAVE_cbranchcc4 * Backport of Fix predicate and constraint mismatch in logical atomic operations * Backport of Migrate to new reduc_plus_scal_optab * Backport of Migrate to new reduc_[us](min|max)_scal_optab * Backport of Change CORE_REGS in GENERAL_REGS * Backport of Fix IRA ICE tmpdir-gcc-.dg-struct-layout-1/t028 * Backport of Fix IRA ICE tmpdir-gcc-.dg-struct-layout-1/t028 -addon * Backport of PR target/63937 fix 216996 * Backport of PR rtl-optimization/63210 IRA * Backport of PR 63173 fix vldX_dup * Backport of PR 63442 libgcc_cmp_return_mode not always return word_mode Feedback and Support Subscribe to the important Linaro mailing lists and join our IRC channels to stay on top of Linaro development. ** Linaro Toolchain Development "mailing list": http://lists.linaro.org/mailman/listinfo/linaro-toolchain ** Linaro Toolchain IRC channel on irc.freenode.net at @#linaro-tcwg@ * Bug reports should be filed in bugzilla against GCC product: http://bugs.linaro.org/enter_bug.cgi?product=GCC * Questions? "ask Linaro": http://ask.linaro.org/. * Interested in commercial support? inquire at "Linaro support":mailto: support(a)linaro.org [1] Stable source package releases are defined as releases where the full Linaro Toolchain validation plan is executed. [2] Engineering source package releases are defined as releases where the compiler is only put through unit-testing and full validation is not performed.

11 years, 4 months

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IFC6410 for toolchain testing

by Renato Golin

Folks, Me and Nick have been back and forth with the IFC6410, using Linaro's utopic Ubuntu + 3.17 kernel, and I can now declare it stable enough to run toolchain tests, maybe not yet builds. The reason is that the kernel, although stable, is only just because it throttles speed to a minimum. So, the core runs at 920MHz and the memory bus is at its minimum frequency. Nick gathers we could speed it up by a factor of 30% and 40% respectively while remaining on the safety zone. However, that would still be not enough. Currently, the boards build LLVM in 7hs, when a Panda does it in 5h, a Chromebook does in 3.5hs and a Chrome2 in 2hs. Improving it by 85% would get us just under 4hs, which is still worse than a Chromebook. If we increase the CPU clock to 1.5GHz per core, we may get it fast enough (but still slower than the Chrome2), to be useful. Their form-factor are better for rack-usage (remote serial, remote reboot, small footprint), so even being slower than Chrome 2s, they'll be faster than Chrome 1s and much more rack-friendly. That, of course, assuming they remain stable at 1.5GHz. Heating will be an issue, but we now have a decent server room and we can buy rack-mounted fans for them, if we need it. In a nutshell, I won't give up on them just yet, but I won't speed up replacing the other boards with them either. We may have to wait a few more releases to be sure, but I'm not expecting anything going in production before February. cheers, --renato PS: Nick, if you want to increase the clock speeds now just to see what happens, I'm game.

11 years, 4 months

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Latest Toolchain Binaries

by Christopher Covington

Hi, The latest toolchain on the following page appears to be broken. http://www.linaro.org/projects/armv8/ Looking around one comes across the following path. http://releases.linaro.org/latest/components/toolchain/.binaries However the tarballs there yield: "You do not have permission to access this file." Thanks, Chris -- Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project

11 years, 4 months

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[ACTIVITY] 1 - 5 December 2014

by Omair Javaid

== Progress == QEMU kernel debugging setup [5/10] [TCWG-568] -- Setup arm Linux kernel debugging to debug watchpoints GDB with cygwin build/testing process [2/10] -- Figured out GDB build and test procedure on cygwin. Miscellaneous [3/10] -- Meetings, Emails etc -- Hong Kong visa application: re-submission of application. == Plan == QEMU kernel debugging setup [TCWG-568] -- Try to figure out kernel debugging help for ptrace debug GDB with cygwin build/testing process -- Document cygwin gdb work flow -- Buid arm-remote gdb on cygwin -- Identify gdb-remote issues on a cygwin host if any

11 years, 4 months

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[ACTIVITY] 01 - 05 Dec 2014

by Prathamesh Kulkarni

== This week == * GCC modularization project - Fixed df.h flattening patch to build on all targets in config-list.mk - Flattening expr.h patch in progress. == Next week == - complete expr.h patch - Submit df.h flattening patch to gcc-patches for review - Test cfgloop.h flattening patch on all targets with ISL enabledin config-list.mk and submit to gcc-patches for review.

11 years, 4 months

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[ACTIVITY] 1st - 5th December

by Bernie Ogden

Holiday [6/10] Misc [3/10] * Mail backlog * Moved all current AArch64 work off 'my' Juno, as ARM needed it back * A little bit of a look at another possible memcpy performance issue libm exercising - TCWG-558 [1/10] * Reduced 'needless calls to pow' to a simple test case ** Found that this is actually an all-targets thing (at least AArch32, AArch64, x86) * Looked through benchfft output ** Looks like only one implementation calls libm much ** This is probably just bad code, but could do with a comparison run on non-AArch64 to be sure =Plan= Switch to TCWG Junos Think about where to go next with libm exercising Complete 'same network' workaround, test benchmark repeatability Port benchmarking scripts to ABE repo Get storage/automation started, if Rob has time =Absences= On holiday Monday 22nd Dec to Friday 2nd Jan

11 years, 4 months

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[ACTIVITY] 1-5 December

by Charles Baylis

== Progress == Bug#403/#418/PR63870 [7/10] . Prepared patches for vldN_lane/vstN_lane . reviewed related patches on list . code changes are ready, but reveal errors in the testsuite Misc [3/10] . mailing llists . meetings . some help with lab config with Renato

11 years, 4 months

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[ACTIVITY] Week 49

by Yvan Roux

== Issues == * none. == Progress == * GCC 4.9 2014.12 (6/10) - Validate and commit all ongoing backports. - Merged FSF 4.9 branch into linaro 4.9 * Misc: (4/10) - Improved GCC revisions management script - Improved test comparison script - Reviewed libunwind AArch64_be patches. - Various meetings. == Plan == * Linaro 4.9 2014.12 release * Libunwind

11 years, 4 months

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[ACTIVITY] 1- 5 December 2014

by Venkataramanan Kumar

= Progress == * TSAN support for Aarch64 (6/10) * Emails, linaro/AMD status meetings. (4/10) 1-1 with maxim, Christophe. == Plan == * TSAN support for Aarch64. * Fix Linaro Bug 863

11 years, 4 months

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[Weekly] 01-05 DEC 2014

by Michael Collison

== This week == * GCC Modularization Project (9/10) - Flattening header files - tree-core.h, and tree.h, c-common.h - Completed - Bootstrap successful on x86 - Testing in progress on all platforms listed in config-list.mk - Reviewed and tested patches from Prathamesh * Misc (1/10) - Conference calls == Next week == - Submit tree.h and related patches for review

11 years, 4 months

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[ACTIVITY] 1-5 December 2014

by Kugan

== Progress == * Compiler-pass to widen computation to back-end promoted mode (6/10) - Addressed most of the comments. testing it. - Re-based the patch to latest type-safe changes - changed the design to remove CONVERT_EXPRs as much as possible and generated AND_EXPR and SEXT_EXPR - Looking at generated code with benchmarks Bugs (4/10) * https://bugs.linaro.org/show_bug.cgi?id=575 * https://bugs.linaro.org/show_bug.cgi?id=398 * https://bugs.linaro.org/show_bug.cgi?id=933 * https://bugs.linaro.org/show_bug.cgi?id=412 == Plan == * Continue with Zero/sign extension. * BUGS == Planned Leave == * 11/12/2014 to 24/12/2014 - 10 days

11 years, 4 months

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mailing list for git commits

by Christophe Lyon

Hi all, I've asked ITS to install a git post-commit hook to send an email after commits in the toolchain git repos. It turns out that they prefer to send such email to mailing-lists, to avoid having to maintain the list of recipients themselves, which of course really makes sense. So far, we already have a cbuild2 mailing-list for commits, which Rob asked to now point to abe instead of cbuild2 repo. I was thinking about asking a single new mailing-list (eg tcwg-commits) and send commit emails to that list for all ours repos, instead of having a list per repo to which interested team members would have to subscribe. We currently have the following git repos: abe backflip backport-tools binutils-gdb binutils cbuild2 cortex-malloc cortex-strings cross-build-tools dejagnu dmucs eglibc fakebench gcc-new gcc gdb glibc lavabench newlib release-notes spec2xxx-utils tcwg-sysadmin Any objection to having such a list? (I do not plan to force subscription of any of you :-) Christophe.

11 years, 5 months

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[ACTIVITY] Week 49

by Renato Golin

== Progress == * Automation Framework (CARD-1378 5/8) - Re-adding Junos and D01s to the rack - Planning access from remote servers - Following up new rack setup - Moving lab bridge to a VM - Re-checking all boards for stability - Working on the dragon boards to get them stable * Background (3/8) - Code review, meetings, discussions, etc. - Trying to get the LLVM Perf system back online - Multiple bot breakages - Reviewing patches for 3.5.1 release - Jira farming * 1 day off == Plan == * Continue working on the dragon boards * Try to get an internal ARM64 buildbot * Hopefully finish off the lab move

11 years, 5 months

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[ACTIVITY] 1-5 December 2014

by Christophe Lyon

== Progress == * GCC trunk/4.9 monitoring (2/10) - still tracking cause of random "interrupted system call" errors - checked possible regressions * AArch64 sanitizers (1/10) - managed to build on board, didn't try to run the tests yet * Neon intrinsics tests (2/10) - fixed a couple of bugs in the already upstreamed tests - continued conversion to GCC testsuite - support to external user (LLVM based compiler) * 4.9-2014.12 release (1/10) - backports+branch reviews * Misc (4/10) - meetings, conf-calls, emails.... == Next == * GCC trunk/4.9 monitoring * AArch64 sanitizers * Neon intrinsics tests * cbuild2/abe: look at backport and tcwgweb Holidays: Dec 22nd - Jan 2nd

11 years, 5 months

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[ACTIVITY] 1 - 5 December 2014

by Will Newton

== Progress == * LLD for AArch64 (5/10) - Submit patches for improving error handling in LLD - Patch review - Reading code - Debug emacs cc-mode issues with LLVM style and submit patches * Investigate eglibc build failure (2/10) * Investigate unaligned access in memcpy issue (1/10) * glibc patch review (1/10, CARD-341) * Email, meetings, etc. (1/10) == Issues == * None == Plan == * More LLD * ILP32 * Merge some gettext and glibc intl code (may fix build failure) -- Will Newton Toolchain Working Group, Linaro

11 years, 5 months

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[ACTIVITY] 24 - 28 November 2014

by Omair Javaid

Apology for sending this out late. == Progress == Debugging ARM gdb watchpoint failures [4/10] [TCWG-567] -- Prepared a testsuite patch for unsupported tests on ARM -- Investigation of other failures due to watchpoints installation rejected through ptrace interface. QEMU kernel debugging setup [4/10] [TCWG-568] -- Setup arm Linux kernel debugging to debug watchpoints Studying arm debug unit architecture versions for possible upgrade to watchpoint/hwbreak implementation. [1/5] [TCWG-569] Miscellaneous [1/10] -- Meetings, Emails etc -- Follow up on Hong Kong Visa == Plan == Figure out unexplained arm gdb watchpoint rejection from ptrace interface. More work to figure out a way to debug arm Linux kernel using QEMU Some further study on arm debug unit architecture versions.

11 years, 5 months

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[ACTIVITY] 24-28 November

by Charles Baylis

== Progress == Holiday [1/10] Investigated bug #928 [4/10] . turns out to be invalid implementation of memset in old linux kernels . raises a question - do we want to provide support for users of old Linux kernels on new compilers? We could spend a long time rehashing work the kernel community has already done. bugs #403/418 [3/10] . working on fixing error reporting for Aarch64 vldN_lane/vstN_lane . trickier than expected, but have found a plan to implement this week Misc [2/10] == Plan == submit patch for #403/418 vldN_lane and work on more intrinsics

11 years, 5 months

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[ACTIVITY] Week 48

by Yvan Roux

== Issues == * Validation unusable all week, seems to be operational now. == Progress == * GCC 4.9 2014.12 (5/10) - Struggle with backports validation, - everything is in the pipe now ... wait and see * Misc: (5/10) - Scripted the GCC revisions management, now able to track ARM related trunk contribution and fill the backport spreadsheet, and will be able to generate the release notes. - Various meetings. == Plan == * Backports * Branch merge * Libunwind (AArch64_be review)

11 years, 5 months

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[ACTIVITY] 24 - 28 November 2014

by Venkataramanan Kumar

Back from Vacation 24, 26, 27 and 28 November. (8/10) = Progress == * TSAN support for Aarch64 (1/10) * Emails, linaro and AMD status meetings. (1/10) 1-1 with maxim == Plan == * TSAN support for Aarch64. * Fix Linaro Bug 863 * catchup emails and other discussions

11 years, 5 months

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[Weekly] 24-28 NOV 2014

by Michael Collison

== This week == * GCC Modularization Project (5/10) - Flattening header files - tree-core.h - Building revealed required flattening other include files: c-common.h and tree.h - c-common.h and tree.h - Flattening is in progress - cfgloop.h - Reviewed, bootstraped and tested patch from Prathamesh * Misc (1/10) - Conference calls * Thanksgiving Holiday, November 27-28th (4/10) == Next week == - Complete tree-core.h and associated header file flattening - submit tree-core.h flattening patch - Submit Prathamesh patches for cfgloop.h

11 years, 5 months

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[ACTIVITY] 24-28 November 2014

by Prathamesh Kulkarni

== This week == * GCC Modularization Project - created initial patch for flattening cfgloop.h. - created initial patch for flattening df.h. == Next Week == - Finalizing patches for cfgloop.h and df.h. - Continue working on flattening header files.

11 years, 5 months

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[ACTIVITY] 24-28 November 2014

by Kugan

== Progress == * Zero/sign extension elimination with widening types (1/10) - Addressing comments from the review * BUG #398 #412 (5/10) - built kernel revision with provided config and toolchain binary release to reproduce gcc segafult. Couldn’t reproduce it. Since there is no more details to reproduce, closed it as cant reproduce. - Spec2k gcc optimization issue was reproduced and reduced test-case was created. - dumps shows that this issue could be related to splitting constants for early during expand might be the root cause. * Holiday (4/10) == Plan == * Continue with Zero/sign extension. * BUG #412 == Planned Leave == * 11/12/2014 to 24/12/2014 - 10 days

11 years, 5 months

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[ACTIVITY] 24-28 November 2014

by Christophe Lyon

== Progress == * GCC trunk/4.9 cross-validation (1/10) - monitoring - tracking cause of spurious "interrupted system call" - testing small changes in harness * AArch64 sanitizers (2/10) - resumed discussion with Maxim/Arnd, the situation is clearer now - started looking at running asan tests in llvm environment (Thanks Renato) * Linaro GCC releases (2/10) - 2014.12 backports reviews - improved scripts to help speed up reviews * Neon intrinsics tests (2/10) - continuing to convert the existing testsuite to dejagnu - checking ARM's aarch64_be patches * Misc (3/10) - calls, meetings, ... == Next == * Neon intrinsics * AArch64 sanitizers * cbuild2 (improve backport-test and tcwgweb)

11 years, 5 months

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[ACTIVITY] Week 48

by Renato Golin

== Progress == * 2 days sick * Lab move (2/6) * Buildbots (TCWG-76 2/6) - Created a buildmaster at Linaro to help local development - Put a dragonboard as a slave, which lasted 2 days up * Background (2/6) - Code review, meetings, discussions, etc. == Plan == * I have no idea

11 years, 5 months

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[ACTIVITY] 24 - 28 November 2014

by Will Newton

== Progress == * Building an ILP32 toolchain for AArch64 (3/10, TCWG-559) - More work on tidying patches - Trying to get a test environment for ILP32 * LLD for ARM and AArch64 (5/10) - Submit more reloc cleanups for LLVM - Patch review - Reading code * glibc patch review (1/10, CARD-341) * Email, meetings, etc. (1/10) == Issues == * OE on Junos no good for building toolchains * Ubuntu on Junos still seems vaporware * Running out of disk space on development machine (bought an external HD) == Plan == * More work on LLD * Try QEMU for ILP32 work -- Will Newton Toolchain Working Group, Linaro

11 years, 5 months

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[ACTIVITY] 24th - 28th November

by Bernie Ogden

ABE benchmarking - TCWG-360 [4/10] * Implemented most of a solution to the 'must be in same network' restriction libm exercising - TCWG-558 [4/10] * lulesh generates needless calls to pow on AArch64 (as opposed to 'pow is slow') ** Working on a reduced test case * Ran a chunk of benchfft, left a process searching the perf reports for libm calls * More chroot/glibc fiddling * Decided Graph500 was unlikely to be interesting Misc - [2/10] =Plan= On holiday Monday - Wednesday More lulesh, benchfft results Think about where to go next with libm exercising Complete 'same network' workaround, test benchmark repeatability Port benchmarking scripts to ABE repo Get storage/automation started, if Rob has time

11 years, 5 months

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building eglibc for arm-linux-gnueabihf tools with multilib support

by Mallikarjun.Gouda＠freescale.com

Hi All, Currently linaro toolchain for arm-linux-gnueabihf built with crosstool-ng scripts uses prebuilt sysroot. I am trying to build eglibc on my own without using prebuilt sysroot. I am not able to exactly create same layout in the library layout. Linaro build layout looks: gcc-linaro-arm-linux-gnueabihf-4.8-2014.01_linux\arm-linux-gnueabihf\libc\usr\lib --> arm-linux-gnueabi arm-linux-gnueabihf one for soft float and other for hard float fp. Can anybody please tell how we tell build system to create directories like above while building eglibc? I used following commands to build eglibc: ../src_eglibc/configure --disable-profile --without-gd --without-cvs --prefix=/usr libc_cv_forced_unwind=yes libc_cv_c_cleanup=yes --with-headers=<some_dir>/arm-linux-gnueabihf/libc/usr/include --host=arm-linux-gnueabihf Make all make install install_root= <some_dir>/arm-linux-gnueabihf/libc/ Thank you very much for your help. //Mallikarjuna

11 years, 5 months

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Fw: strange behavior in GCC for use of uninitialized variables

by Pinski, Andrew

Forwarding this message to the linaro toolchain list instead. I am not the person who should be supporting the Linaro ODP project with GCC questiosn; the toolchain team inside Linaro should be instead. Thanks, Andrew Pinski ________________________________________ From: Ola Liljedahl <ola.liljedahl(a)linaro.org> Sent: Monday, November 24, 2014 2:31 PM To: lng-odp(a)lists.linaro.org; Pinski, Andrew Subject: strange behavior in GCC for use of uninitialized variables Consider the following code fragment (from real life): #include <stdint.h> typedef volatile uint32_t odp_atomic_u32_t; static inline uint32_t odp_atomic_fetch_inc_u32(odp_atomic_u32_t *ptr) { return __sync_fetch_and_add(ptr, 1); } static inline void odp_spin(void) { #ifdef __SSE2__ __asm__ __volatile__ ("pause"); #else __asm__ __volatile__ ("rep; nop"); #endif } typedef struct { int count; odp_atomic_u32_t bar; } odp_barrier_t; void odp_barrier_wait(odp_barrier_t *barrier) { uint32_t count; int wasless; // wasless = barrier->bar < barrier->count; <<<lost on git add -p __atomic_thread_fence(__ATOMIC_SEQ_CST); count = odp_atomic_fetch_inc_u32(&barrier->bar); if (count == 2*barrier->count-1) { barrier->bar = 0; } else { while ((barrier->bar < barrier->count) == wasless) odp_spin(); } __atomic_thread_fence(__ATOMIC_SEQ_CST); } While fixing and cleaning up this code, the indicated line that initializes 'wasless' was dropped (because it reappears in a later patch in the patch set after the odp_atomic_fetch_inc call). To my surprise, GCC did not complain when compiling this file (using -O2 -Wall). But it does complain when compiling with -O0 -Wall. With some investigation, it seems like GCC understands that if a statement does not have any side effects so it can optimize away everything, including the usage of the uninitialized variable and thus also the corresponding warning. olli@macmini:~/hacking/gcc-wunit$ gcc -O2 -Wall -c odp_barrier.c olli@macmini:~/hacking/gcc-wunit$ gcc -O0 -Wall -c odp_barrier.c odp_barrier.c: In function ‘odp_barrier_wait’: odp_barrier.c:42:9: warning: ‘wasless’ may be used uninitialized in this function [-Wmaybe-uninitialized] while ((barrier->bar < barrier->count) == wasless) ^ However the proper code seems to be generated in both cases (there is a "pause" instruction inlined or a call to odp_spin). So odp_spin() is not without side effects and is not optimized away. This contradicts my hypothesis. Consider this minimalistic example: olli@macmini:~/hacking/gcc-wunit$ cat wunit.c #include <stdlib.h> void test(void) { int wasless; int wasmore; if (wasless) (void)0; if (wasmore) abort(); } olli@macmini:~/hacking/gcc-wunit$ gcc -O0 -Wall -c wunit.c wunit.c: In function ‘test’: wunit.c:9:5: warning: ‘wasmore’ is used uninitialized in this function [-Wuninitialized] if (wasmore) abort(); ^ olli@macmini:~/hacking/gcc-wunit$ gcc -O2 -Wall -c wunit.c wunit.c: In function ‘test’: wunit.c:9:5: warning: ‘wasmore’ is used uninitialized in this function [-Wuninitialized] if (wasmore) abort(); ^ Here GCC warns when used with both -O0 and -O2 but only for the usage where there is a side effect. The use of 'wasless' that does not lead to any side-effects is ignored (and possibly rightly so, I can imagine this is undefined behavior, fortunately I did not attempt to run this program or my computer could have melted). It is a bit worrying to me that instances of use of initialized variables is sometimes missed by GCC. Both because of lack of diagnostics for what is most likely a bug but also because I don't understand why GCC does this and the implications of that (at least it is a known unknown now). -- Ola

11 years, 5 months

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[ACTIVITY] 17th - 21st November

by Bernie Ogden

cbuild2/ABE benchmarking - TCWG-360 [1/10] * Attempted to use LAVA for benchmarks ** Fell over on lack of TCWG machines in same network libm exercising - TCWG-558 [6/10] * Much fiddling with chroots * Some fiddling with benchfft * Little actual progress Meetings/mail/etc - [3/10] =Plan= libm exercising * Run benchfft in chroots * Investigate Graph500 * Validate existing results with consistent methodology ** Hopefully this is reaching the point of handle-turning ABE benchmarking * Port 'cbuild2' benchmarking to ABE repository * Test ABE benchmarking in TCWG lab (and LAVA?) * Test repeatability (assuming the above go well) * Get storage/automation started, if Rob has time Holiday *next* week (Tuesday and Wednesday, perhaps Monday as well)

11 years, 5 months

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[ACTIVITY] 17 - 21 November 2014

by Will Newton

== Progress == * Building an ILP32 toolchain for AArch64 (4/10, TCWG-559) - Applied a few simple ILP32 patches to glibc - Rebasing and reworking existing ILP32 glibc patches * LLD for ARM and AArch64 (5/10) - Submit first set of reloc cleanups for LLVM * Email, meetings, etc. (1/10) == Issues == * None == Plan == * Submit more ILP32 patches for glibc * Further LLVM/LLD changes -- Will Newton Toolchain Working Group, Linaro

11 years, 5 months

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[ANNOUNCE] Linaro Toolchain Binaries 2013.07 released

by Zhenqiang Chen

The Linaro Toolchain and Platform Working Groups are pleased to announce the 2013.07 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. Uses include: * Cross compiling ARM applications from your laptop * Remote debugging * Build the Linux kernel for your board What's included: * Linaro GCC 4.8 2013.07-1 * Linaro Newlib 2.0 2013.06 * Linaro Binutils 2.23 2013.06 * Linaro Eglibc 2.17-2013.07-2 * Linaro GDB 7.6 2013.05 * 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. Interesting changes include: * The sysroot is based on Linaro versions of Eglibc. About details of Linaro Eglibc, please refer https://releases.linaro.org/13.07/components/toolchain/eglibc-linaro. The Linux version is supported on Ubuntu 10.04.3 and 12.04, 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/2013.07 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. Know issues: * Some version information in README are incorrect. * gdb can not backtrace into libc. Notes: * To use all of the features of Linaro eglibc, the sysroot in 32-bit toolchain release is updated to Linaro eglibc, which is 2.17. If you get runtime errors about libc version, please get the sysroot from the release tarball (gcc-linaro-arm-linux-gnueabihf-4.8-2013.07-1_linux/arm-linux-gnueabihf/libc/) or download from launchpad https://launchpad.net/linaro-toolchain-binaries/support/01/+download/linaro… If you do not want to use Linaro sysroot, you'd add option to gcc to find your sysroot: --sysroot=<directory> * To run 32-bit application built from arm-linux-gnueabihf toolchain in aarch64 system, you'd copy sysroot and runtime from release package to your root of aarch64 system. i,e. scp -r gcc-linaro-arm-linux-gnueabihf-4.8-2013.07-1_linux/arm-linux-gnueabihf/libc/* AARCH64-SYSTEM:/ scp -r gcc-linaro-arm-linux-gnueabihf-4.8-2013.07-1_runtime/* AARCH64-SYSTEM:/

11 years, 5 months

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