All,
As I mentioned on Monday, due to new members of the team coming on
board I am going to rejig the meeting times from 18th December.
My proposal is as follows (all times UK Local - UTC+0h winter, UTC+1h summer):
0. These changes will come into effect the week commencing 18th December.
1. The weekly call will happen on a Monday, at 0930 and 1600. You
only need to make it to one instance of the call. For those who are
physically near each other arranging it so that both calls get
attended would be good and notes shared would be good.
2. The Stand-up call will happen on a Thursday, alternating between
0930 and 1600. This is 'best effort' - but please try to attend at
least every other week.
3. The performance call will go weekly, and will happen on a Thursday,
alternating between 0930 and 1600. If you are on the invite list to
this call again please try to attend at least every other week, but if
you can manage every week that would be great.
If you have any comments on these please can you raise them by the end
of the week as I would like to confirm what we are going to do at the
call on Monday (at the normal time of 0915UTC).
Thanks,
Matt
--
Matthew Gretton-Dann
Linaro Toolchain Working Group
matthew.gretton-dann(a)linaro.org
The minutes of the performance call held on 3 December 2012 can be found at:
https://wiki.linaro.org/WorkingGroups/ToolChain/Meetings/2012-12-03
In summary the actions from the meeting are:
* ACTION: Yvan will do the trunk merge this week
* ACTION: Yvan to do the GCC release next week
* ACTION: Christophe to do the GDB release branch merge
* ACTION: Matt volunteered Zhenqiang as the QEMU manual tester this month
* ACTION: Matt: want shrinkwrap to go upstream
* ACTION: Matt - Can blueprint improvements in shrink wrap past that
* ACTION: Matt to create a blueprint on aarch32 ARMv8 instructions in QEMU
* ACTION: Matt to decide if aarch32 ARMv8 instructions in QEMU needs a card
* ACTION: Christophe to send Michael cross build failures to investigate
Thanks,
-- Michael
== Progress ==
* Turn off 64-bits bitops in Neon: patch proposed upstream after
positive benchmarking.
Re-submitted after request to add testcases and documentation for
the new option.
* Disable peeling: running benchmarks with peeling completely disabled
to see the impact.
* PGO/hot-cold partitioning: tested new patch from google, which
solves some of the ICEs, but makes new ones appear.
* builtin_bswap16 backport to Linaro-4.7: checking if there would be a
possibility to keep the testcase which fails in one of our
configurations, after rebasing my branch.
* Trying to bootstrap gcc-linaro/4.7 on board
* Internal support
== Next ==
* Follow-up on 64-bits bitops in Neon
* Look at benchmarks results with peeling disabled
* finish builtin_bswap16 backport
Summary:
* Verify shrink-wrap related bugs.
* Validate and release Linaro toolchain binary 2012.11 release.
* Collect performance data for different branch costs.
Details:
* Validate and release Linaro toolchain binary 2012.11.
* Test aarch64 toolchain. All the basic tests PASS except gdbserver.
* Collect performance data for branch cost combination. For eembcv1,
some combinations have more than 2% performance improvement on
PandaBoard THUMB mode. More test results will come later.
* Verify shrink-wrap related bugs (http://goo.gl/6fGg5). All pass with
the new patch. Native tests are ongoing. Identify the root cause why
the copy, which blocks the shrink-wrap optimization for 453.povray
benchmark, is not optimized.
Plans:
* Finalize the aarch64 toolchain binary release plan.
* Collect performance data for branch cost tuning.
* Enhance shrink-wrap to optimize the copy.
Best regards!
-Zhenqiang
== Progress ==
* Boehm GC AArch64 support:
- Read wikis and papers on the memory model
- Reported an issue with the current ARMv7 atomic builtins
- Submitted the fix, which was approved
- Improving libatomic-ops AArch64 support with load-acquire/
store-release usage.
== Next ==
* Continue on the Boehm GC AArch64 support.
