== Progress ==
* Maintenance (CARD-1833 5/10)
- Building libc++/abi/unwind in LLVM/Clang tree
- Fixing some build errors (D11486)
- Addressing comments to submissions from last week
- Committing approved ones
- Re-working the others
* Releases (CARD-1431 1/10)
- Building 3.7.0-RC1 on ARM and AArch64, uploading
* Benchmarks (CARD-716 2/10)
- Running LNT, SPEC and EEMBC on ARM and AArch64 for 3.7.0
* Background (2/10)
- Code review, meetings, discussions, etc.
- Upgraded APM to Debian, kernel 3.16
- Perf still segfaults. :(
== Plan ==
* Finish open reviews
* Continue getting libc++ to build and pass the tests in tree
* Look at some of the performance regressions in 3.7
# Progress #
* TCWG-806, aarch64 remote debugging multi-arch support. [4/10]
Patches are done. Need to test them and polish them.
Fix various multi-arch issues when --wrapper is used in GDBserver.
Patches are pushed in to mainline.
* TCWG-876 [1/10]
Re-run GDB testsuite with incoming Linaro toolchain release.
Everything looks OK.
* TCWG-860, aarch64 fast tracepoint. [1/10]
Polish the patches, and ready for submission.
* TCWG-757, upstream patch review. [2/10].
* Misc, meeting. [2/10]
# Plan #
* TCWG-806, test patches on different targets, polish patches
and post them for review.
# Absence #
06th Aug - 10th Aug, GNU Tools Cauldron.
11th Aug - 14th Aug, Holiday.
--
Yao
Benchmark infrastructure - TCWG-360 [6/10]
* Some user support/bugfixing/bugraising
* Multinode job more or less working (not fully tested)
* Additional restructuring got rid of some more complexity
** Though if my simplifying assumption doesn't hold, I'll have to put it back
Benchmarking 101 presentation [2/10]
* Ran through slides with Ryan & Maxim
* Removed many slides
* Collected up and categorized the removed slides
** Probably will go into future presentation(s)
Misc [2/10]
=Plan=
* Tweak multinode a little more
* Integrate multinode into Jenkins
** To the extent that I'm comfortable with the security
* Read a bit about some benchmarks that aren't SPEC
* Start noise control experiments (may inform presentation)
=Week After Next=
Holiday
* One day off - Bastille day (2/10)
== Progress ==
o Upstream GCC (3/10)
* Finalized and committed fix in trunk for Linaro bug #416
o Linaro GCC release (4/10)
* Reviewed and did more patches for tcwg-release script
* Still investigate validation issues.
* Prepared FSF branch merge into Linaro GCC 5 branch
o Misc (1/10)
* Various meetings
== Plan ==
- Summer Holidays (2 weeks)
== Progress ==
* Add REG_EQUAL note for arm_emit_movpair (1/10)
- Patch2 ok to commit.
- Ran complete validation.
- Found an issue and posted a patch to fix
* Factor conversion out of COND_EXPR - TCWG-849 (6/10)
- Found a performance regression in tree-ssa-reasoc
- Looked at the tree-ssa-reasoc code to see possible fixes
- Posted an RFC patch
* PR66865
- Wine segfaults from gcc in trunk (r225757)
- Reproduced it but turned out not from my commit
- Fixed by other PR
* Misc (2/10)
- Looked at interaction between gcc optimization passes
- gcc-patches, gcc-bugs list
- Meetings
== Plan ==
- GCC Bugs
- TACT driven optimization exploration for gcc
- Linaro bug 1318
Benchmark infrastructure - TCWG-360 [5/10]
* Worked through my Jenkins issues with Fathi, raised some tickets at him
* Converting LAVA end into multinode job
** Having some trouble with multinode API
Benchmarking 101 presentation [3/10]
* 1/2 day of discussions/reading, full day of redrafting
* Looked for Michael Hope's similar 2012 presentation
** Found slides, not video
=Plan=
* Complete multinode job
* Integrate into Jenkins to the extent that I'm comfortable
* Complete 'shareable' draft of benchmarking-101
** And see if I have enough left over for -102, maybe -103
== This week ==
* TCWG-140 - Transform end of loop conditions to min_expr (1/10)
- Blocked waiting on validation
* TCWG-833 - Exploit Wide Add operations when appropriate (7/10)
- Developed patch to handle signed and unsigned cases for Aarc32
- Investigation and debugging into support for Aarch64
* TCWG-834 - Use non-unit stride loads by preference when applicable (1/10)
- Initial Aarch32 investigation
* Misc (1/10)
- Conference calls
== Next week ==
- Validate Aarch32 patch for TCWG-833
- Develop Aarch64 patch for TCWG-833
- Validate TCWG-140
- Make recommended fixes to TCWG-146 and resubmit upstream
* TCWG-777 (3/10)
- O2 workaround: -fno-tree-pre -fno-tree-fre -fno-tree-dominator-opts
-fno-gcse -fno-peephole2
- Observing rtl dumps for gcse, combine, peephole2 with different
options and optimization levels.
- Continued investigating ICE during gcc build with my pass applied.
- Sent mail to tcwg, for further suggestions
* TCWG-830 (2/10)
- Verified the behavior for aarch64, and extended patch for aarc64
along same lines.
- Running Charles's microbenchmarks on r1-a7
- Benchmarking setup with Bernie. Blocked by permissions, sent a mail
to lava-lab,
for granting requisite permissions
* TCWG-835 (2/10)
- observing vector and asm dumps
* Misc (3/10)
- Travel to Mumbai for US Visa Interview
- Conference Calls
== Next Week ==
- Continue with TCWG-777, TCWG-835, TCWG-830
I'm trying to build the toolchain as win32 executable on Ubuntu with ABE.
I'm pretty new with ABE. I followed the FAQ
https://wiki.linaro.org/WorkingGroups/ToolChain/FAQ and Rob's post. Also
checked the MakeRelease.job and slave.sh. I have all packages listed in the
slave.sh installed. So I assume I have all dependencies ready for the build.
Here is what I have done:
Create _build subfolder beside abe
CD to _build and run: ../abe/configure --with-fileserver=148.251.136.42
--with-remote-snapshots=/snapshots-ref
First build this: ../abe/abe.sh --target aarch64-none-elf -build all
It installed the toolchain to
_build/builds/destdir/x86_64-unknown-gnu-linux. I added the bin under it to
my PATH
Then do 2nd round build: ../abe/abe.sh -host i686-w64-mingw32 --target
aarch64-none-elf -build all
However, I'm getting config error while it building libiberty:
configure:5946: checking for library containing strerror
Configure:5978: error: Link tests are not allowed after GCC_NO_EXECUTABLES.
My understanding is that the linker cannot find glibc or eglibc.
What have I missed?
Any where I can find detail instruction like step by step to build Linaro
toolchain for running on Windows host?
Sincerely,
Qyq
== Progress ==
* Maintenance (CARD-1833 4/10)
- Clang driver:
- Passing -Wa,-mfpu and friends to assembler (D11147, D11148)
- Passing -I to assembler (D11185)
- Don't include libgcc/asm if using libunwind/libc++abi (D11153)
- Asm warnings:
- Trying again to look for a way to disable asm warnings from clang (D11216)
* Benchmarks (CARD-716 3/10)
- Benchmarking shrink-wrapping in AArch64
- Setting up LNT Benchmarks on A32/A64
- Scripts to collate / compare LNT results on the fly
- Benchmarking LNT on 3.5.2 and 3.6.2 on ARM and AArch64
- Multisampling, perf, and all goodness
- Getting ready to compare with 3.7.0 to come
* Releases (CARD-1431 1/10)
- Spinning release 3.7.0
- Many changes, CMake builds, etc.
- Fixing the test-release.sh script (D11326)
* Background (2/10)
- Code review, meetings, discussions, etc.
- Upgrading APM to Debian 3.16
== Plan ==
* Upstreaming pending reviews
* Continue release 3.7.0, benchmark it
* Start looking at the effects of the stride vectorizer on ARM/AArch64
# Progress #
* TCWG-806, aarch64 remote debugging multi-arch support. [6/10]
Some code refactor and fix various multi-arch issues when --wrapper
is used in GDBserver. Patches are being tested.
* TCWG-757, Patches review. [2/10]
* Misc, meeting, [2/10]
# Plan #
* TCWG-806, aarch64 remote debugging multi-arch support.
# Absence #
* 06th Aug - 10th Aug, GNU Tools Cauldron.
* 11th Aug - 14th Aug, Holiday.
--
Yao
1 day off (2/10)
== Progress ==
* backports/release/infra (1/10)
- reviews
* GCC (3/10)
- posted patch to fix vget_lane on armeb
- investigating AdvSIMD failures on aarch64_be.
Having a way to debug target code would help (qemu does not seem
to support aarch64_be yet, and I use the foundation model in bare
metal mode)
* Misc (4/10)
- meetings, conf-calls, emails
== Next ==
Holidays until Aug 3rd.
Benchmark infrastructure - TCWG-360 [5/10]
* More thinking/prototyping sufficiently-secure Jenkins benchmarking
* Converting LAVA end into multinode job
Benchmarking presentation [2/10]
* A couple of helpful discussions
* Read a couple of helpful docs
Misc [3/10]
=Plan=
* Complete multinode job
* Settle on a plan for Jenkins
* Redraft presentation
== This Week ==
* TCWG-777 (4/10)
- Resolved ICE caused by pass during gcc build but hit another ICE:
http://pastebin.com/RUAY6scB
- Current pass state: http://pastebin.com/AGXnSkrZ
- For test-case:
void f(int flags)
{
void foo(void);
if (flags & 1)
foo();
}
- temporaries don't exist for -O1
- for -O2 temps introduced by peephole2 due to define_peephole2
pattern in thumb2.md:1540
http://pastebin.com/3rEF8Te4
So this intentionally transforms rtx from
zeroextractsi_compare0_scratch to rtx from shiftsi3_compare0_scratch.
Why is it beneficial to do this transform ?
- Looking into combine pass
- For above test-case works with -marm for -O2.
* TCWG-830 (3/10)
- trying to understand vect dump
- untested patch: http://pastebin.com/K4UX5iYz
* Misc (2/10)
- Started looking at TCWG-835, loop vectorized on x86 but not arm
- Committed fix to segfault on -dx
- Conference calls
== Next Week ==
- Continue with TCWG-777, TCWG-830, TCWG-835
- Travel to Mumbai on 14th July (Tuesday) for US Visa Interview with
US Consulate.
Hospital and physio (2/10)
== Progress ==
o Upstream GCC (2/10)
* More work on ongoing patches
o Linaro GCC release (3/10)
* Reviewed patches for tcwg-release script
* Looked at validation issues and redo backports for 5.1
o Misc (3/10)
* Various meetings
* Upstream libunwind support
== Plan ==
- Continue ongoing tasks
== Progress ==
LLDB development
-- Debugging problems with process launch and debugserver crash on remote
connection. [TCWG-855] [6/10]
-- Caught the notorious issue mentioned above fix can be found here
http://reviews.llvm.org/D11129.
-- Figured arm lldb and lldbserver host builds on chromebook will put
steps on collaborate LLDB page soon. [1/10]
Miscellaneous [3/10]
-- Travel to Islamabad for Czech Republic visa
-- Meetings, emails, discussions etc.
== Plan ==
LLDB development
-- Follow up review process for process launch bug fix.
-- Run testsuite for armhf and figure out issues to fix.
-- Submit patches to fix build on older version of gcc.
Eid Holidays 17th to 21st July 2015
== This week ==
* TCWG-146 - Detect smin/umin idion (0/10)
- Waiting for upstream approval/review
* TCWG-140 - Transform end of loop conditions to min_expr (1/10)
- Blocked waiting on validation
* TCWG-833 - Exploit Wide Add operations when appropriate (8/10)
- Mere detailed investigation
- Working theory is to develop wide add rtl patterns that
incorporate vec_unpack to widen 16-bit to 32-bit
* Misc (1/10)
- Conference calls
- Conference call with Charles and Prathamesh to discuss
autovectorization progress
== Next week ==
- Validate patch for TCWG-140
- Develop patch for TCWG-833
- Validate TCWG-833 if successful patch is developed
- Investigate Aarch64 implementation
== Progress ==
* Add REG_EQUAL note for arm_emit_movpair (1/10)
- committed patch1 after testing again
* Factor conversion out of COND_EXPR - TCWG-849 (5/10)
- Gone through couple of iterations and committed the patch
- There are still some improvements need as follow up patches
* TACT -TCWG-851 (2/10)
- Started looking into spec2k
* Misc (2/10)
- Looked at interaction between gcc optimization passes
- gcc-patches, gcc-bugs list
- Meetings
== Plan ==
- GCC Bugs
- TACT driven optimization exploration for gcc
- Linaro bug 1318
== Progress ==
* Releases (CARD-1431 1/10)
- Released 3.6.2-final
* Maintenance (CARD-1833 5/10)
- Reducing runtime of some benchmarks in LLVM's
test-suite by getting rid of millions of useless
fprintf calls.
- Working on https://llvm.org/PR20700 some more
* Background (4/10)
- Code review, meetings, discussions, etc.
- Long TargetTuple review (D10969) / discussions
- Replacing broken buildbot USB disks (need to buy more)
- Bisecting self-hosting bot breakage
- Testing patches for ARM
- Jira farming
== Plan ==
* continue PR20700
* continue review/discussion of TargetTuple
* look again at PR20757
* maybe look at PR21000
* Off Monday (2/10)
== Progress ==
* published linaro-4.8 and 4.9 2015.06 releases
* linaro-5.1-2015.07 (1/10)
- backport reviews
- updated my helper script for reviews for cope with the git-only branches
* upstream (1/10)
- started looking at vget_lane Neon intrinsic failure on armeb
* infra/release/backports (2/10)
- reviews
* Misc (4/10)
- meetings, conf-calls, emails
== Next ==
* Off Tuesday
* backports, release, validation: update doc
* backports, reviews
* upstream work
== Later ==
* Off July 18th-Aug 3rd
Hi Linaro Toolchain Group,
I am comparing execution time (run time) of sin() trigonometric function
between following glibc (including libm) libraries for aarch64 (juno cortex
a57) :
Linaro glibc 2.19, Linaro eglibc 2.19, eglibc 2.19 (from
http://www.eglibc.org/) and Linaro glibc 2.21.
My observation for execution time of sin():
with Linaro glibc 2.19 and eglibc 2.19 = 1m24.703s (approx)
whereas,
with Linaro eglibc 2.19 & Linaro glibc 2.21 = 0m25.243s (approx)
Has Linaro optimized the libm functions for aarch64 in Linaro eglibc 2.19 ?
If yes, please point me to relevant reference from where I can find more
information on them.
Since the eglibc development from version 2.19 has stopped, will Linaro
maintain its own development version of glibc ?
I am using below snippet code and linux 'time' command to calculate the
time.
void sin_func(void)
{
double incr = 0.732;
double result, count = 0.0;
printf("%s\n", __func__);
while (count < 105414350.0) {
result = sin(count);
count += incr;
}
}
Thanks.
--
with regards,
Virendra Kumar Pathak
== Progress ==
LLDB development [TCWG-855] [8/10]
-- Figure out build steps for building cross lldb-server with
arm-linux-genueabihf-g++
-- Debugging of lldb-server communication packets for fixing lldb-server
armhf crash problem.
-- Comparison with androidabi version to figure out missing pieces
Miscellaneous [2/10]
-- Ubuntu reinstall on laptop
-- Follow up on Czech Republic visa
-- Meetings, emails, discussions etc.
== Plan ==
LLDB development
-- Work on lldb-server for armhf and try to figure out crash problems
[TCWG-855]
End of sick leave (will work 100% from home until my cast is removed).
== Progress ==
o Upstream GCC (2/6)
* Back to ongoing patches
o Linaro GCC release (7/6)
* Reviewed FSF branch merge into 4.8/4.9 branches
* Reviewed patches for tcwg-realease script
* Sent a first batch of backports for 5.1
Still pending due to validation infra. issues
o Misc (1/6)
* Various meetings
== Plan ==
- Continue ongoing tasks
