== Progress: ==
Holiday [2/10]
Rewrite of division optimisation changes following review - TCWG293 [8/10]
== Plan ==
Mostly on holiday this week. I may be working sporadically
Back full time
== Progress ==
* resumed 1:1 calls with Zhenqiang, Venkat, Charles.
* GCC trunk cross-validation (2/10):
- monitored results
- a few improvements/cleanups
* Neon-intrinsics tests (5/10)
- continuing conversion
- needs to add support AArch64 Neon overflow flag
* Misc (meetings, conf-call, ..) (3/10)
* Successfully tried OpenNX setup put in place by Maxim
(on office computer, despite firewall and no root access)
== Next ==
* GCC trunk cross-validation:
- monitor and report results
- use this system to pre-validate a patch from Kugan
- share scripts with Kugan
* Neon intrinsics tests:
- continue conversion
- hopefully push a preliminary version upstream
== Progress==
lowlevellock performance bugs - TCWG-435 [3/10]
* Trying to build/test aarch64 on a foundation model
cbuild benchmarking - TCWG-360 [4/10]
* Integrating Maxim's spec scripts into Kugan's benchmarking branch
* Began modifying the branch to use existing cbuild functions where possible
Meetings/mail/etc [3/10]
== Plan ==
Holiday next week (w/c 26th May)
This week:
* Try testing glibc on system qemu rather than foundation model
* Carry on with cbuild benchmarking
* If time, put together some more experimental memset implementations
== Progress ==
* GDB arm v8 record/replay
-- Bug fixing: Improve gdb.reverse testsuite results on armv8
[TCWG-451] [2/10]
-- core files issue submitted bfd patch upstream [TCWG-451]
-- Support for recording Data processing - Advanced SIMD and
Cryptographic [TCWG-405] [TCWG-407] [3/10]
-- Support for recording A64 Data processing - Floating point
instructions [TCWG-404] [TCWG-406] [2/10]
* Miscellaneous
-- UK visa application submission [3/10]
== Plan ==
* Continue work on issues related to GDB arm v8 record/replay
The Linaro Toolchain Working Group (TCWG) is pleased to announce the 2014.05
stable release of the Linaro GCC 4.9 source package.
Linaro GCC 4.9 2014.05 is the second Linaro GCC source package release in the
4.9 series. It is based on FSF GCC 4.9.1+svn210052 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 approaches version 4.9.1.
The Linaro TCWG will provide monthly stable[1] source package releases until
FSF GCC 4.9.1 is released. At that point Linaro GCC 4.9 will merge in
FSF GCC 4.9.1 and, release Linaro GCC 4.9.1, and then return to a schedule of
stable quarterly releases and monthly engineering[2] releases.
Interesting changes in this GCC source package release include:
* Updates to GCC 4.9.1+svn210052
* Backport of the Ada AArch64 support
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 Launchpad against "Linaro GCC project":
http://bugs.launchpad.net/gcc-linaro/+filebug.
* 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.
== Progress ==
* Reload - IRA bug fix (5/10)
- In thumb2 mode, we get a pattern "*ior_scc_scc" for the third
argument expression by the combiner pass.
- Expression Class:foo(x,0,((y==x)||(z==x))) x gets register r1 and second r2 .
- The class object this pointer is passed in r0. r7 is used for stack pointer.
- The pattern "*ior_scc_scc" demands more LO_REGISTERS. It needs 5
LO_registers for destination and 4 source operands. But we are left
with r3,r4,r5,r6 only.
- Such situation is handled for Thumb1 only using
TARGET_CLASS_LIKELY_SPILLED_P. Thumb2 should accept HI registers also.
- Changing the pattern to accept general registers for destination
operation is also not helping.
- Need to explore secondary reload macros.
* Misc
- AMD meetings and internal tasks (2/10)
- 1-1 meetings (Ryan, Christophe and Maxim) (1/10)
* Testing: Installed packages and ran GCC Linaro compiler 4.8
correctness tests on hardware. Completed running SPEC 2006 for -O3
-mcpu=cortex-a57 flag (2/10).
== Plan ==
* Continue bug fixing.
* LTO bootstrap failure
* Testing GCC Linaro compiler on hardware.
* New laptop install ubuntu, set up chroot and migrate to toolchain
64 environment.
* UK VISA processing.
== Progress ==
* TCWG-413 (8/10) sha1 performance
- Looked at IRA dumps and aarch64 target hooks.
- GCC now uses FP registers as register class and this results in lots
of fmovs for the test-case.
- Discussed in list and tried spill_class hook for aarch64. This helps
sha1.
- Regression tested the change.
- Ran Spec2000 with the changes and 168.wupwise, 187.facerec are failing.
- Investigation continues.
* TCWG-468 (1/10)
- Continuing with benchmarking.
* Set-up NX and started using it (1/10)
== Plan ==
* Benchmarking.
* Upstream zero/sign extension elimination activities.
* sha1 performance.
== Issue ==
* None.
== Progress ==
* Commit three patches to enhance shrink-wrap for loop. But community
reports an ICE in dwarf info with the patches. (TCWG-133, 5/10)
* Update/test shrink-wrap for apcs patch according to comments (TCWG-482, 2/10)
* Loop-invariant heuristic tuning (TCWG-763, 2/10).
* Investigate Linaro crosstool-ng gdb build fail for 2014.05 config.
But have not find an easy way to fix lsbcc build fail. (1/10).
== Plans ==
* Fix the ICE triggered by shrink-wrap changes.
* gdb build fail issue if Linaro still use crosstool-ng for release
* Continue loop-invariant heuristic tuning
== Planned leaves ==
* June 2.
== Week of May 12th ==
- Rolled out TCWG development environment. (TCWG-483, 4/10)
-- https://collaborate.linaro.org/display/TCWG/TCWG+Development+Environment
-- Demo'ed it both inside and outside TCWG.
-- Finished up configuration of environment and setup backups.
- STREAM performance regression (TCWG-388, 2/10)
-- Prepared first batch of patches for upstream submission
- Various discussions, including ... (4/10)
-- register allocation and reload with Venkat
-- register allocation with Kugan
-- benchmarking with Kugan
--
Maxim Kuvyrkov
www.linaro.org
== Week of May 5th ==
- Worked on standardized development environment (TCWG-483, 8/10)
-- Deployed it on toolchain64.lava and maximk.linaro.org.
-- Demoed and got early feedback from several people.
- Various discussions, including ... (2/10)
-- GCC debugging and var-tracking pass with Michael.
--
Maxim Kuvyrkov
www.linaro.org
== Progress ==
* Kernel (CARD-1246 5/10)
- Named register support in Clang
* http://reviews.llvm.org/D3797
* Toolchain (CARD-862 3/10)
- Testing libc++abi on ARM, now that it has EHABI
- Setting up Chromebook library buildbot (FAILED)
- One of the bots had a battery failure, needs to be replaced
- Which means we won't have the lib bot soon :(
* Background (2/10)
- Code review, meetings, discussions, etc.
== Plan ==
* Follow up named register patch upstream
* Help LLVMLinux with moving current code to conform to global named regs
* Help LLVMLinux with LAVA bots
* Replace the failing buildbot
* Set up a temporary (local) library buildbot on the spare Chromebook
* Try other hardware to replace all Chromebooks
== Progress ==
* Various patch review and followup (2/10)
* Helping diagnose an aarch64 linker crash in buildroot (1/10)
* Failed attempt to update kernel on Chromebook (1/10)
* Analyze and benchmark cortex-strings to find the oustanding work (1/10)
* Get docker setup with cgroups to measure memory usage (4/10, TCWG-441)
* Trying to get NX working on Fedora 20 (1/10)
== Issues ==
* None
== Plan ==
* Get postgresql and hopefully others working with new benchmark setup
* Figure out how to make NX work
--
Will Newton
Toolchain Working Group, Linaro
Hi All,
AAarch64 back-end defines GENERAL_REGS and CORE_REGS with the same set
of register. Is there any reason why we need this?
target hooks like aarch64_register_move_cost doesn’t handle CORE_REGS.
In addition, IRA cost calculation also has logics like make common class
biggest of best and alternate; this might get confused with this.
Attached RFC patch removes it. regression tested for
aarch64-none-linux-gnu on qemu-aarch64 with now new regression. Is this OK ?
Thanks,
Kugan
gcc/
2014-05-14 Kugan Vivekanandarajah <kuganv(a)linaro.org>
* config/aarch64/aarch64.c (aarch64_regno_regclass) : Change CORE_REGS
to GENERAL_REGS.
(aarch64_secondary_reload) : LikeWise.
(aarch64_class_max_nregs) : Remove CORE_REGS.
* config/aarch64/aarch64.h (enum reg_class) : Remove CORE_REGS.
(REG_CLASS_NAMES) : Likewise.
(REG_CLASS_CONTENTS) : LikeWise.
(INDEX_REG_CLASS) : Change CORE_REGS to GENERAL_REGS.
== Progress ==
* Reload - IRA bug fix (5/10)
- Expression foo(a,0,((b==a)||(c==a))) a gets register r1 and second
a gets register r6, but third a not able to reuse r6 or r1 and spill
failure.
- Debugging the IRA dumps and reload dumps
- Getting Maxim help
* TCWG-180 (3/10)
- GCC bootstrap fails with compare errors.
- comparing the dis assembly.
* Misc (2/10)
- AMD meetings
- 1-1 meetings
- looked at 1 x86 related bug
== Plan ==
* Continue bug fixing.
* LTO bootstrap failure
Short week, 2 days off (4/10)
== Issues ==
* None
== Progress ==
* CARD-1162 : Linaro GCC 4.9 (6/10)
- Prepared FSF 4.9 branch merge in Linaro one.
- Backported Zhenqiang upstream patches.
- Iterate with rob on various jenkins issues
- Looked at gerrit for the backport reviews
* Misc:
o Cbuildv1 baby-sitting
== Next ==
* Continue on Linaro GCC 4.9 release.
== Progress ==
* TCWG-413 (5/10)
- Rebuild FSF 4.8, Linaro 4.8 and Linaro 4.9 releases for aarch64 with
crosstool-ng (Kept all the dependencies same and used different gcc).
- Lost all the config for running benchmark on the test-machine and set
it up again.
- Re-ran spec2k benchmarking and results.
* TCWG-468 (5/10)
- Looked in detail IRA dumps and cost models.
- Also looked at IRA and LRA code to get better understanding of the
algorithms.
- Costs dumped seems odd and looking further.
== Plan ==
* Benchmarking.
* Upstream zero/sign extension elimination activities.
* sha1 performance.
== Progress ==
* GDB arm v8 record/replay: core files issue [TCWG-451] [6/10]
-- Add bfd support for missing aarch64 core file handlers.
-- Added regset caching functions for aarch64 linux gdb.
* GDB arm v8 record/replay: Support for recording A64 Data processing
- Floating point instructions [TCWG-404] [3/10]
* Miscellaneous [1/10]
-- Meetings
-- Browse through Linaro training resources.
-- UK visa documents preparation.
== Plan ==
* Continue work to support GDB arm v8 record/replay
-- Support for recording A64 Data processing - Floating point
instructions [TCWG-404]
-- Support for recording syscalls, signals etc [TCWG-409]
* UK visa application submission.
= Progress ==
* Continue improving LAVA support in DejaGnu. (TCWG 455 - 1/10)
* More work on regression test analysis and reporting. (TCWG 448 - 4/10)
- Did builds of 4.8, 4.9, and master to establish baseline test
results.
- Worked on test analysis script.
- Jenkins matrix builds & test runs are working, and copying results to
toolchain64.
* Meetings and Misc (5/10)
- Fixing various Cbuildv2 bugs found by yroux dealing with git.
- Fixed bug where the GDB build was polluting the destdir with
binutils.
- Installed OpenNX chroot on toolchain64 with maxim.
- Fixed disk on toolchain64 with maxim to access all 4TB. Use GPT...
- Added more config triplets to Jenkins, so now it builds everything
we support.
== Plan ==
* Install lava-tool and get it working on all the tcwgbuild* machines.
* Continue improving LAVA support in DejaGnu. (TCWG 455)
* More work on regression test analysis and reporting. (TCWG 448)
- Do diffs of new builds test runs from the baseline, not the previous
build.
* Try to look at the LLVM branch of Cbuildv2, do some testing of it.
== Issues ==
* Jenkins needs to be able to see LAVA slaves as online, but not
booted..
* The skiing is good, but the avalanche danger is high, so limits
accessibility.
* We need a backup plan for toolchain64.
* Google groups have problems, so had to setup test results list on
one of my servers instead. (ask me if you want to be on the list) The
new beta release of GNU Mailman looks very nice.
* The chromebooks in our build farm can't build GCC native.
- rob -
== Issue ==
* None.
== Progress ==
* Identify a build environment issue for linux64 gdb binaries "Symbol
format `elf32-littlearm' unknown".
* Send out shrink-wrap related patches from community review (TCWG-133, 2/10)
* Move-loop-invariant heuristic tuning (TCWG-469, 8/10).
- Update heuristic according to benchmark testing.
== Plan ==
* Update shrink-wrap patches according to comments.
* Continue on move-loop-invariants heuristic tune.
== Planned leaves ==
* June 2.
== Progress==
Holiday [2/10]
Fixing performance bugs in lowlevellock - TCWG-435 [4/10]
* Initial patch for lowlevellock.h largely done, awaiting an aarch64 test run
* About 1/2 of the lowlevellock.h's remain post-patch, need to ask
some questions about them
cortex-strings memset - TCWG-156 [1/10]
* Fixed an alternative implementation, a little more benchmarking investigation
cbuild benchmarking branch [1/10]
* Hunting for correct benchmark source, added a little more error checking
Meetings/mail/etc [2/10]
== Plan ==
More of the same -
* Post lowlevellock.h patch and ask some questions
* Finish exploring memset alternatives and work out how to benchmark them
* Carry on with cbuild benchmarking branch
Holiday 26th - 30th May
== Progress ==
* Kernel (CARD-1246 3/10)
- Committed Named Register LLVM change
- Working on the Clang part
- Helping LLVMLinux to set up bots/LAVA tests
* Tests/CBuild2 (CARD-716 2/10)
- Submitted CBuild2 LLVM patch, waiting for review
- Implemented sqrt to pacify GCC on sphereflake
* Background (3/10)
- Code review, meetings, discussions, etc.
* Bank Holiday Monday (2/10)
== Plan ==
* Continue named registers on Clang
* Continue LLVMLinux hardware test bot
* Run some benchmarks on AArch64
* Check CBuild2 progress, try builds live
== Progress ==
* Bank Holiday Monday (2/10)
* glibc patch review and followup (1/10)
* Started investigating malloc intensive applications (3/10, TCWG-440)
* Investigate a couple of linker issues (1/10)
* Figure out how to benchmark postgresql (3/10, TCWG-441)
== Issues ==
* None
== Plan ==
* Develop a good general way to measure memory usage of complex applications
--
Will Newton
Toolchain Working Group, Linaro
== Progress ==
Bank holiday [2/10]
Investigated using D01 board [1/10]
Retested and pinged division patch - TCWG-293 [2/10]
Added post-index addressing to NEON memory access for ARM -TCWG-430 [5/10]
* wrote patch
* makes useful improvement to libvpx performance
