=Progress=
cbuild2 benchmarking - TCWG-360 [5/10]
* Proposed a plan for benchmark storage
* A bit more thought on cross-running
* Prototyped script to launch/run/release on LAVA targets (e.g. wg)
** The 'run' part is pretty much independent of the 'LAVA' part
lowlevellock.h commentary - ???? [2/10]
* In response to a patch review, added some comments to this fairly obscure file
* Took longer than expected, but the end's in sight so I guess I'll finish
* I know a bit more about futexes and threads now
Meetings/mail/etc [3/10]
=Plan=
Holiday. Back on 1st September.
== Progress ==
Arm gdb record-replay bug fix [4/10] [TCWG-314]
* Testing of all patches on x86 and arm machines.
* Patch submission upstream after sync up with latest gdb trunk.
AArch64 gdb record-replay bug fix [3/10] [TCWG-503][TCWG-498]
* Debugging of testsuite failures with apm and foundation mode.
* Patch series update after sync up with latest trunk.
GDB Tracepoints/Fast Tracepoints support on arm [2/10] [TCWG-480]
* Search for previously submitted patches, wiki info and other documentation.
* Started with initial study and code understanding.
Miscellaneous [1/10]
* Research GDB record/replay usage scenarios.
* Meetings/emails and installation/configurations etc
== Plan ==
AArch64 gdb record-replay bug fix [TCWG-503][TCWG-498]
* Fix test failures if possible otherwise submit updated patches.
GDB Tracepoints/Fast Tracepoints support on arm [TCWG-480]
* Further study and investigate a missing functionality on arm.
Verify GDB non-stop debug support on ARM. [TCWG-246]
== Progress ==
* Looked at implementation options for backlog cards and
closed/postponed cards that doss not benefit or cards that require
excessive re-architecture that will not be possible now. (5/10)
- TCWG-468 - Postponed after detailed study and discussion.
- TCWG-412 (Support literal/constant pool sharing (wont-fix): As it is,
intra procedularl literal pool fix happens in
TARGET_MACHINE_DEPENDENT_REORG with arm_reorg. It is quite complex and
somewahat hacky. it would become even more messy if we are to record
these information and reuse it for whole program as a way to share
literal poool. Additionally A-profile (which is Linaro's focus) dosent
benefit from this as we use movw/movt instead. Therefore decided to
clsoe this as wont fix.
* TCWG-413 - Release benchmarking (2/10)
- Benchmarking or release for a15 and a57
* Analysed coremark and spec2k for uxt/sxt optimizations (3/11)
- Studied coremark and have additional patches in development for
missing cases.
* Misc
- Looked at bug database and monitored patches relevant to arm/aasrch64
== Paln ==
* Look at open uxt/sxt bugs in gcc bugzilla
* Study coremark and then spec2k for uxt/sxt
== Progress ==
* Reviewed a big pile of benchmarking patches for cbuild2. (TCWG 1378
- 2/10).
* Worked on stabilizing "Backport" Jenkins job (TCWG 1378 - 6/10).
* Meetings and Misc (2/10)
== Plan ==
* Keep tracking down Jenkins issues with Backport job.
* Get my D01 board working finally, since I killed my Odroid U2.
* Do more thorough testing of SSH performance improvements.
=Progress=
cbuild2 benchmarking - TCWG-360 [4/10]
* Some disagreements with gerrit
* One of my patches broke bare metal builds (now fixed)
* More review of the way we store benchmark sources
Other - [5/10]
* Meetings, mail, etc (featuring newlib build options, defaults,
cbuild vs benchmark scripts)
* Learned to use git-send-email, bent it to my will
* Authentication pain on ARM-side
Holiday - [1/10]
=Plan=
cbuild2 benchmarking
* Finish source/data storage plan
* Figure out how benchmark cross-running will work, get started on it
Holiday next week (25th - 29th August)
== This week ==
* TCWG-515 - Neon intrinsic testing part 1 (3/10)
- Completed testing with internal compiler error discovered compiling
with -Og and -g
- GCC bugzilla report 62040 already exists for this issue
* TCWG-518 - Neon intrinsic testing part 2 (2/10)
- Completed testing with no regressions found
* TCWG-519 - Neon intrinsic testing part 3 (2/10)
- Completed testing with no regressions found
* Reviewed branch merge of Linaro 4.8 and 4.9 with FSF trees (3/10]
== Next week ==
* Continue with neon intrinsic testing
* Investigate bug 373 - [gcc-4.9][android][armv8] internal compiler error
* Develop outline for Linaro Connect presentation
== Progress ==
* TCWG-180 Debugging - LTO bootstrap failure in Aarch64 with GCC 4.9. (6/10)
Analyzed tree dumps between stage2 and stage3 compilers. Noted that
extra gimple declarations in stage2 compiler.
Also inline minimum parameters in gimple.c.048i.inline were different.
Richard Beiner found that way we hash the string literals was
different between stage2 and stage3 compilers.
Tested the patch, he posted on trunk but it does not solve the
comparison failures.
Also GCC garbage collector parameters for expansion and maximum heap
size varies between stage 2 and stage3. Setting this parameters to
same value in stage2 and stage3 builds fixes bootstrap failures in
Aarch64.
These fixes are for trunk and stage 1 5.0.
Ref: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62077
Still need to find a work around for release branches
Testing these patches on AMD64 /Aarch64 machines.
* Others (2/10)
* Upstream patch review.
* 1-1 Meeting Christophe.
* Misc and internal meeting.
* setup LLVM.
* Friday national holiday (2/10).
== Plan ==
* Continue LTO bootstrap issue.
* Benchmark Core mark with LTO.
* Upstream patch review.
== MISC ==
None .
The Linaro Toolchain Working Group (TCWG) is pleased to announce the 2014.08
stable release of both Linaro GCC 4.9 and Linaro GCC 4.8 source package.
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 engineering[2] releases.
Linaro GCC 4.9 2014.08 is the fifth Linaro GCC source package release and first
stable one in the 4.9 series. It is based on FSF GCC 4.9.2-pre+svn213803 and
includes performance improvements and bug fixes.
Interesting changes in this GCC source package release include:
* Updates to GCC 4.9.2-pre+svn213803
* Backport of [AArch64] Drop ISB after FPCR write.
* Backport of [AArch64] Remove from arm_neon.h functions not in the spec
* Backport of [AArch32] Fix check for __FAST_MATH in arm_neon.h
* Backport of [AArch64] fix and enable non-const shuffle for bigendian using TBL
instruction
* Backport of [AArch64] Fix constraint vec_unpack_trunk
* Backport of [AArch32] Cortex-A5 rtx costs table
* Backport of [AArch32] Handle clz, rbit types in arm pipeline descriptions
* Backport of [AArch64] Fix argument types for some high_lane* intrinsics
implemented in assembly
* Backport of [AArch64] Handle fcvta[su] and frint in RTX cost function
* Backport of [AArch64] Prologue rewrite + performance.
Linaro GCC 4.8 2014.08 is the fourteenth release in the 4.8 series and is in
maintenance. Based off the latest GCC 4.8.4+svn213802 release, it includes
performance improvements and bug fixes.
Interesting changes in this GCC source package release include:
* Updates to GCC 4.8.4+svn213802
* Backport of Fix [AArch32] for PR sanitizer/58543
* Backport of Fix [AArch64] for PR target/59744
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.
