Investigate effectiveness of noise-control measures - TCWG-358 [6/10]
* Finished setup, started running experiments
* Initial data pretty noisy, more runs needed
* Kicked off more runs for week of Connect
Ensure that all critical data is logged - TCWG-349 [1/10]
* Logged a few more variables, tested, merged
* Put down until we have a controlled image build
Misc - [3/10]
* 2 post-connect days off (4/10)
== Progress ==
o Linaro GCC (3/10)
* Backporting armv8-1 support
* Dealing with conflicts
o Misc (3/10)
* Various meetings
* Internal report on Connect
== Plan ==
o Backports
o Releases process tasks
== This week ==
* TCWG-317 - Exploit wide add operations when appropriate for Aarch32 (4/10)
- Patch sent upstream for review
- Fixed some failing tree-ssa testcases by modifying
'check_effective_target_vect_widen_sum_hi_to_si_pattern' to indicate
Aarch32 supports vector widening add
- Fixed length attributes on patterns in neon.md
- Added test cases to ChangeLog
- Debugging failures on -flto and arm big endian
* TCWG-369 - Exploit wide add operations when appropriate for Aarch64 (3/10)
- Fixed some failing tree-ssa testcases by modifying
'check_effective_target_vect_widen_sum_hi_to_si_pattern' to indicate
Aarch64 supports vector widening add
- Debugging tree-ssa test suite failures
* Bugzilla 57195 (mode iterator bug) blocked compiling new pattern (1/10)
- Patch checked in upstream on trunk
* TCWG-77 - Transform end of loop conditions to min_expr (2/10)
- Submitted upstream waiting for final approval
- Merged multiple patterns into one pattern in match.md
- Rewrote test case to work on all targets
* Misc (1/10)
- Conference calls
== Next week ==
- Holiday/vacation
== Progress ==
- 1 day off recovering from travel and 1 public holiday (4/10)
- https://gcc.gnu.org/ml/gcc-patches/2015-07/msg02196.html (1/10)
* Approved patch
* re-based and retesting before committing
- https://gcc.gnu.org/ml/gcc-patches/2015-10/msg00129.html (1/10)
* Found a latent issue while testing patches
* posted a patch for review
- Widening pass (TCWG-547) - 4/10
* Working on review comments
== Plan ==
* Monday public holiday
* Post the revised patch for widening pass
* commit approved patches
== Progress ==
* Monday off (2/10)
* Buildbot (6/10)
- Investigating sanitizer crash in Thumb2+NEON
- Testing IFC6410 with Linaro 15.09
- CPUs good, 1.7GHz on all cores, stable, cool
- Not enough space on local (fast) flash
- USB stick stable, but slow (3h vs 2h on Chrome 2)
- USB disk unstable and slow (power management, etc)
- SATA broken, and slow
* Infrastructure (1/10)
- Discussing LAVA instance in TCWG lab, benchmarks
- Playing with D02: corrupted system, but the machine is *fast*
* Background (1/10)
- Code review, meetings, discussions, general support, etc.
== Plan ==
* More infrastructure meetings
* More buildbot work
* Whatever...
# Progress #
* TCWG-373, Aarch64 non-stop debugging (or displaced stepping). [2/10]
Patches V1 are ready for upstream submission, but find opcodes has
already interfaces to decode instructions, so decide to use opcodes
for aarch64 GDB first.
* TCWG-387, one patch exposing one opcode interface is pushed in. [4/10]
Switch software single step code for aarch64 to using opcodes
interface. Patch is pushed in.
Rewriting prologue analyser to use opcode interface too.
* TCWG-159, Kernel awareness in GDB. [1/10]
Resume the work as Peter Griffin has cycles to do so. We are happy
with the plan so far.
* Review arm software breakpoint in GDBserver patches. [1/10]
* Misc, [2/10]
# Plan #
* TCWG-387, TCWG-373
--
Yao
== Progress ==
2 days off (4/10)
* Infrastructure/validation: (3/10)
further checking of cross-testing results stability on aarch64-linux
- found a workaround for a timestamp problem (_Pragma3 testcase)
- looked at c11-atomic-exec-5 whose execution time ranges between 1s
and 1h :-)
- forcing make check to -j8 seems to work well, will work on a nicer
improvement
* reported and briefly looked at failure in a new libstdc++ test
(directory_iterator) on armv5t
* Misc (conf calls, meetings, emails, ....) (2/10)
* Internal (1/10)
- GNU linker patch review
The Linaro Toolchain Working Group is pleased to announce the availability
of the Linaro Stable Binary Toolchain Release-Candidate GCC 5.1-2015.08-rc2
Archives.
http://snapshots.linaro.org/components/toolchain/binaries/5.1-2015.08-rc2/
These archives provide cross-toolchain executables (compiler, debugger,
linker, etc.) and shared libraries (libstdc++, libc, etc.) that target ARM
or Aarch64 GNU/Linux and bare-metal environments. The cross-toolchain
binaries execute on a Linux or MS Windows (under mingw32) host
operating-system.
Please evaluate this release-candidate for correctness. Linaro will
shortly spin the Linaro GCC 5.1-2015.08 release if this release-candidate
passes stakeholder validation.
For bugs related to this release-candidate please email
linaro-toolchain(a)lists.linaro.org or file a bug at http://
https://bugs.linaro.org/enter_bug.cgi?product=Linux%20Binary%20toolchain
NEWS
* 2015.08-rc2
* The Linaro 2015.08-rc2 release-candidate binary toolchain is based on
the Linaro GCC-5.1-2015.08-rc1 release-candidate source archive. The only
changes between 2015.08-rc1 and 2015.08-rc2 were the following changes in
how the binary toolchains were built. The compiler itself was not changed.
* x86_64 hosted, armv8l-linux-gnueabihf targetted cross toolchains are
now correctly configured. This was broken in 2015.08-rc1. The
cross-compiler targetting armv8l-linux-gnueabihf is now correctly
configured with --with-arch=armv8-a --with-fpu=neon-fp-armv8
--with-float=hard --disable-multilib --enable-multiarch.
* Glibc’s slibdir and libdir were once again modified to address Linaro
Bugzilla 1717 – Linaro-4.9-2015.05 moved system libs from /libc/lib/ to
/libc/usr/lib/ which breaks things. The following are now the correct
locations:
libdir=lib/ (linker-scripts and static archives)
slibdir=usr/lib/ (shared objects)
rtlddir=lib/ (dynamic linker)
* 2015.08-rc1
* x86_64 hosted, armv8l-linux-gnueabihf targetted cross toolchain now
provided.
Delivering on REQ-477 – Enable x86_64 to Aarch32 (32-bit ARMv8-A)
cross binary toolchain product release and CARD-1637 – Enable Aarch32
(32-bit ARMv8-A) cross binary toolchain product releases ,
armv8l-linux-gnueabihf targetted toolchains are now available as part of
this release-candidate.
* Python support in GDB for both Linux and Mingw32 (32-bit windows).
Delivered as requested in the linaro-toolchain mailing list post
title – windows binary builds with gdb-python enabled?.
* Added missing expat support to GDB.
This addresses the following linaro-toolchain mailing list post –
"Missing expat support in GDB 7.8 multi-lib enablement for arm bare-metal
targets."
* A fix for multilib enablement in baremetal toolchains (as described
in ABE Review 6862).
* Library Paths are now congruent with older Linaro Toolchain path
layouts. This addresses Linaro Bugzilla 1717 – Linaro-4.9-2015.05 moved
system libs from /libc/lib/ to /libc/usr/lib/ which breaks things.
libdir=lib/ (shared objects)
slibdir=usr/lib/ (static libraries)
rtlddir=lib/ (dynamic linker)
# Progress #
* TCWG-189, Aarch64 fast tracepoint. [2/10]
Done. Patches are committed.
* TCWG-373, Support displaced stepping on aarch64-linux. [4/10]
GDB works basically, still need to refactor and polish the code.
* TCWG-374, Test displaced stepping on aarch64-linux. [1/10]
Add new tests.
* TCWG-166, gdbserver support for tracepoints on ARM. [3/10].
Review patches, play with patches, and investigate on some issues.
Ongoing.
# Plan #
* TCWG-373, TCWG-374, and TCWG-166.
--
Yao
