== Progress ==
LLDB vs GDB investigation [TCWG-583] [2/10]
Configuration of GDB AArch64 remote testing with juno. [1/10]
GDB AArch64/ARM/X86 native/remote testing and comparison result
compilation. [4/10]
Investigate some record-replay testsuite failures on d01. [2/10]
Miscellaneous [1/10]
-- Meetings, Emails etc
== Plan ==
More LLDB vs GDB investigation [TCWG-583]
More GDB AArch64 feature comparison
ABE benchmarking automation - TCWG-360 [5/10]
* Converted Juno runs from OE to Ubuntu
* Fixed cross-compilation in SPEC2000
* Picked up a couple of users, spent some time supporting them
* Discussion about storage
catomics - TCWG-436 [3/10]
* Took a remarkably long time to make the last few patches build
* Looked through the generated code
* Learned some of the ways of test-schroot
Misc - [2/10]
=Plan=
Support Charles' release benchmarking
Try Jenkins again, now that release has gone
Carry on, hopefully close, storage discussion
Benchmark catomic patches
Write up/think about where to go with libm exercising
== This week ==
* GCC Modularization Project (1/10)
- Flattening header files
- Reviewed expr.h patches and email discussion regarding post stage
3 development
* Bug Fixing (7/10)
- Bug 539 - .LTHUNK symbols are surviving
- Triage indicates bug is multiple inheritance related
- Investigated several legacy fixes on trunk that no longer apply
- Investigating possible fix in linker:
http://sourceware.org/ml/binutils/2012-06/msg00260.html
- Bug 535 - static cast from float to int not working on ARM hardfp
- Initial triage
* Backports (1/10)
- 217394- PR target/61997 - cc1plus ICE with aarch64 target using PCH
and builtin functions
* Misc (1/10)
- Conference calls
== Next week ==
- Work on backports and bug fixes
- Vacation January 22nd and 23rd.
== Progress ==
* Tuesday sick
* Automation Framework (CARD-1378 5/8)
- Fixing more crashed Junos
- Working on QEMU VMs on gateway (buildbot master, nagios)
- Finalising server purchase, building new rack
* Release 3.6 (TCWG-575 1/8)
- AArch64 built and tested, all green.
- ARM is broken, investigating...
* Background (2/8)
- Code review, meetings, discussions, etc.
- Jira farming
== Plan ==
* More Jira farming
* Setup the new server in the rack
* 3.6 benchmarking against 3.5
== Progress ==
* GCC trunk/4.9 monitoring (1/10)
- noticed a regression in the 4.9 branch
* AArch64 sanitizers (2/10)
- juno-01 back online, so I could rebuild & test llvm with asan tests enabled
- several failures reported, debugging...
* Neon intrinsics tests (1/10)
- pushed a series of patches, probably too late before stage 4.
* Backports (1/10)
- reviews
* Misc (5/10)
- meetings, conf-calls, emails, ....
- Connect preparation
== Next ==
* GCC trunk/4.9 monitoring
* AArch64 sanitizers
* Neon intrinsics tests
* cbuild2/abe: improve reporting, look at backport and tcwgweb scripts
The Linaro Toolchain Working Group (TCWG) is pleased to announce the 2015.01
engineering release of the Linaro GCC 4.9 source package.
Linaro GCC 4.9 2015.01 is the tenth Linaro GCC source package release in the
4.9 series. It is based on FSF GCC 4.9.3-pre+svn219502 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. The Linaro TCWG provides
stable[1] quarterly releases and monthly engineering[2] releases.
Interesting changes in this GCC source package release include
* Linaro bugzilla PR fixed : #902
* Updates to GCC 4.9.3-pre+svn219502
* Backport of [AArch64] Support SISD variants of SCVTF,UCVTF
* Backport of [AArch64] Fix ICE in aarch64_float_const_representable_p
* Backport of [AArch64] Switch to sched-pressure by default.
* Backport of [AArch64] Add scheduler for ThunderX
* Backport of [AArch64] Remove crypto extension from default for cortex-a53,
cortex-a57
* Backport of [AArch64] doloop pattern for -fmodulo-sched
* Backport of [AArch32] Add execution tests of ARM REV intrinsics.
* Backport of [AArch32] Post-indexed addressing for NEON memory access
* Backport of [AArch32] Improve 64 bit division performance (serie)
* Backport of [AArch32] Revert 215321 backport.
* Backport of [AArch32/AArch64] Add ACLE 2.0 predefined macros
* Backport of PR tree-optimization/54742 - extend jump thread for finite state
automata
* Backport of PR target/61997 - cc1plus ICE with aarch64 target using PCH and
builtin functions
* Backport of PR target/63724 - Fix up BSL expander for floating point types
* Backport of [LRA] Relax one gcc_assert in lra-eliminate for fixed register
* Backport of Add clobber_reg function
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 bugzilla against GCC product:
http://bugs.linaro.org/enter_bug.cgi?product=GCC
* 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 ==
* LLD (3/10, TCWG-561, TCWG-570)
- Re-spin and re-submitted error handling patch and dependencies
- Submitted a patch for crash with sh_addralign == 0
* AArch64 ILP32 toolchain (2/10)
- Got a native ILP32 toolchain building on a hackbox
- Got a working hacking session on Juno with help from Dave
- Just need to combine the two
* Other stuff (1/10)
- Email, meetings, etc.
* Holiday Thursday and Friday (4/10)
== Issues ==
* None
== Plan ==
* Run make check on ILP32 glibc
* Connect presentation
* Try and get outstanding LLD patches committed
--
Will Newton
Toolchain Working Group, Linaro
== Issues ==
* none.
== Progress ==
* Give compilation courses at University (5/10)
* GCC 4.9 2015.01 (4/10)
- Gave some support to Michael for his backports
- Performed mine.
* Misc: (1/10)
- meetings.
- mails
== Plan ==
* Linaro GCC 4,9 2015.01 release
ABE benchmarking automation - TCWG-360 [8/10]
* Added some sanity checks, fixed some bugs in LAVA URL handling
* Some struggling with Jenkins, with support from Rob
* Compress builds before scp-ing
* Resurrected SPEC, fixed some problems I'd forgotten about
Misc [2/10]
* Email catchup, start-of-year meetings
* Brief look at single-thread optimization in glibc (TCWG-436)
* Connect prep (including immunization boosters, I'm still a little woozy)
=Plan=
Test SPEC with present state of automation
Keep struggling with Jenkins
Address benchmark storage
Actually do something with TCWG-436
Write up/think about where to go next with libm exercising
== Progress ==
* TCWG-486 (4/10)
- Ready to start benchmarking
- Discussed with Bernie on new benchmarking set-up
- Waiting for Ryan on permission
* https://bugs.linaro.org/show_bug.cgi?id=412 (4/10)
- Created a reduced test-case and filed upstream bug
- looked at GCSE code and ifcvt code/dumps
* gcc bugzilla and gcc-patches list (2/10)
- Review patches
- Looked at arm related bugs
== Plan ==
TCWG-486 and TCWG-555
== This week ==
* GCC Modularization Project
- Worked on header-file flattening tool to make it usable for
flattening headers.
Used it to flatten expr.h.
- fixed build issue with ggc-compile.c due to tree.h flattening.
- committed Michael's tree.h flattening patch to FSF trunk (r219402).
- built r219402 on all targets in config-list.mk with languages: all, go
- upstreamed patch to fix visium build on FSF trunk which broke due to r219402.
- fixed plugin/ggcplug.c test-case which was failing due to r219402.
- sent expr.h flattening patch upstream for review.
== Next Week ==
* Commit expr.h flattening patch to FSF trunk.
* Commit cfgloop.h flattening patch to FSF trunk.
* Try to commit df.h flattening patch to FSF trunk.
== Progress ==
* Automation Framework (CARD-1378 2/10)
- DNS requests (Hetzner, bridge), new APM
- Following up on purchase of new server, new rack, UPS
* Buildbots (TCWG-76 4/10)
- Enabling swap on dragon boards (local bots)
- Investigating AArch64 RT failure, XFAIL like ARM
- AARch64 full bot (Clang+LLVM+RT) green! Getting ARM to make it public
- Installing QEMU VMs for different buildmasters
* Background (4/10)
- Code review, meetings, discussions, etc.
- Email back-log...
- FOSDEM organisation (accepting talks, fixing Penta cock-ups)
== Plan ==
* Increase check-all verbosity on bots
* Finish installing all buildmaster QEMU images
* Setup new rack
* Probably more release 3.5.1 testing (RC3), CMake bot testing
* Help Will and Christophe setting up their bots
== Backlog ==
* Fix libc++abi NEON/VFPv3 unwinder
* FPU parser (PR20787)
* .fpu in assembler (PR20757)
* -mpfu in driver (PR20700)
== Progress ==
* LLD (5/10, TCWG-561, TCWG-570)
- Re-spin and re-submitted error handling patch
- Implemented some more relocations and added tests
* AArch64 ILP32 toolchain (2/10)
- Investigated OE for building a native toolchain
- Started on hacking ABE to build a "cross on native" toolchain
- Switched to hackboxes as the performance is better than LAVA
* Released newlib and binutils 2015.01 releases and updated release
procedure (2/10)
* Other stuff (1/10)
- Email, meetings, etc.
- Pushed new strcpy to cortex-strings
== Issues ==
* None
== Plan ==
* Get ABE building a native ILP32 toolchain on LP64
* More LLD work
--
Will Newton
Toolchain Working Group, Linaro
== Progress ==
* Back from holiday
* Public holiday Thursday (2/10)
* TCWG-486 (4/10)
- Simplified existing patch
- Discussed with Zhenqiang
* TCWG-555 (4/10)
- propagate wrap/overflow information to ssa
== Plan ==
TCWG-486 and TCWG-555
== Progress ==
* Holiday Monday to Wednesday (6/10)
* Public holiday Thursday (2/10)
* Catch up on email (1/10)
* LLD for AArch64 (1/10, TCWG-563)
- Rebased, tidied up and submitted error handling patch
== Issues ==
* None
== Plan ==
* Figure out how to get a native ILP32 toolchain
* More LLD work
--
Will Newton
Toolchain Working Group, Linaro
== Progress ==
1 day week:
* Automation Framework (CARD-1378 1/2)
- Resetting APMs and Junos that fell during the holidays
* Release 3.5.1 (TCWG-477 1/2)
- Testing RC2, all good
== Plan ==
* improve buildbots (swap, verbose, libs)
* fix libc++abi NEON/VFPv3 unwinder
* purchase new builder, prepare lab for it
== This week ==
* GCC Modularization Project
- started working on flattening rtl.h
- submitted expr.h flattening patch upstream for review.
- worked with Michael on tree.h flattening patch.
== Next week ==
- investigate bug 905
- modify expr.h, cfgloop.h patches to avoid conflicts with Michael's
tree.h flattening patches and submit upstream.
== Progress ==
* 2015.01 release
- reviewed Yvan's backports
* GCC trunk/4.9 monitoring (2/10)
- still tracking cause of random "interrupted system call" errors
* AArch64 sanitizers (1/10)
- LLVM+compiler-rt build seems OK, but still unable to run the tests on Juno
* Neon intrinsics tests (3/10)
- continued conversion to GCC testsuite
- fixed checks for Neon QC flags
- patch reviews
* Misc (4/10)
- meetings, conf-calls, emails, ....
== Next ==
* GCC trunk/4.9 monitoring
* AArch64 sanitizers
* Neon intrinsics tests
* cbuild2/abe: look at backport and tcwgweb
On holiday until January 5h
ABE benchmarking automation - TCWG-360 [6/10]
* TCWG/LAVA lab interactions working with just a couple hacks
* Jenkins job created (thanks Rob) and beginning to work
Misc - [4/10]
* Included a quick look at Will's single-thread performance patches -
unfortunately, no time to actually do anything with them
=Plan=
Benchmarking storage/automation
Look though Will's single-thread performance patches
Switch to TCWG Junos
Write up/think about where to go next with libm exercising
Test benchmark repeatability
=Absences=
On holiday Monday 22nd Dec to Friday 2nd Jan
== Progress ==
* Friday off
* Automation Framework (CARD-1378 2/8)
- Writing up best practices, lab structure, etc
- Removing port forwards, private keys from the lab
- IT ticket to remove tcwg-sysadmin from public git
* Toolchain (CARD-862 1/8)
- Fixed compiler-rt problem on AArch64 build
- Fixing libcxxabi problem on ARM unwind
* Release 3.5.1 (TCWG-477 1/8)
- Finished RC1 testing on ARM and AArch64
* Buildbots (TCWG-76 2/8)
- Found commit that broke lnt bot, green again
- Setting up internal bots (4 ARM, 1 ARM64)
* Background (2/8)
- Code review, meetings, discussions, etc.
== Plan ==
* Continue 3.5.1 release (RC2, etc)
* Fix a few remaining problems with Compiler-RT / libc++abi
Holiday until January...
== Progress ==
* Holiday Thursday and Friday (4/10)
* LLD for AArch64 (2/10, TCWG-563)
- Completed patch to improve relocation range checking
- llvm mailing lists down so no reviews happening
* ILP32 work (3/10)
- Several test builds on Juno, still cannot get a working native toolchain
* Email, meetings, other stuff (1/10)
== Issues ==
* Cable power level issue causing broadband problems
== Plan ==
* On holiday until in January, but I will check email periodically
--
Will Newton
Toolchain Working Group, Linaro
== Progress ==
QEMU kernel debugging setup [3/10] [TCWG-568]
-- Finally figured out the steps to debug kernel with ARM cortex A9 core.
Kernel debugging to investigate limitation of ARM watchpoint
implementation [2/10] [TCWG-569]
-- Debug kernel code with gdb to investigate problems.
Miscellaneous [1/10]
-- Meetings, Emails etc
-- Wiki updates
Sick Leave [4/10]
== Plan ==
QEMU kernel debugging setup [TCWG-568]
-- Figure out steps to debug kernel with ARM cortex A15 core.
More Kernel debugging to investigate limitation of ARM watchpoint
implementation [TCWG-569]
-- Get A15 core running on QEMU and debug kernel hw debug
implementation on both A9 and A15.
Updates to GDB wiki pages with kernel debugging howto.
I've completed renaming Cbuildv2 to Abe, as well as modifying all the
board files for remote testing to match what the new DNS server is
using. Please stop using the existing cbuild2 repository, as all changes
are now done in the new repository. I'll leave the old repository for a
while, I know there are branches there people depend on. For those, I'm
sorry for the pain (having just gone through that myself), but please
migrate any important branches to the new repository. URLs for that are
here:
https://git.linaro.org/toolchain/abe.git
- rob -
ABE benchmarking - TCWG-360 [7/10]
* Finished post-move LAVA lab workarounds
* Should be flexible enough for TCWG lab too, but we'll see
* Refactored sources - now more robust and maintainable
lowlevellock.h comments - CARD-341 [1/10]
* A further round of changes, got an OK
Raised a bug on GCC re questionable generation of pow calls - TCWG-558 [0/10]
* Upstream fixed it really fast
Misc - [2/10]
=Plan=
Switch to TCWG Junos, perhaps start using gprof
Think about where to go next with libm exercising
Look though Will's single-thread performance patches
Test benchmark repeatability
Port benchmarking scripts to ABE repo
Start on storage/automation, if Rob has time
=Absences=
On holiday Monday 22nd Dec to Friday 2nd Jan
== Issues ==
* none.
== Progress ==
* GCC 4.9 2014.12 (2/10)
- Released
* Bugzilla #902 (ICE in split_reg on armeb-linux-gnueabihf) (6/10)
- reduced test case
- identified the commit that introduced the bug
- identified the trunk revision that fixed it which is
not backportable on our branch as it
* Misc: (2/10)
- Revisions management script
- Various meetings.
== Plan ==
* Bugzilla #902
* List the backports needed for 2015.01
* Libunwind
== This week ==
* GCC Modularization Project (9/10)
- Flattening header files
- Submitted tree-core.h, and tree.h patches for review
- Successfully tested on platforms listed in config-list.mk
- Reviewed and tested patches from Prathamesh
* Misc (1/10)
- Conference calls
== Next week ==
- Work on backports and bug fixes
= Progress ==
* TSAN support for Aarch64 (6/10)
Working on writing Aarch64 specific "internal_clone" function.
* Emails, linaro/AMD status meetings. (4/10)
1-1 with maxim, Christophe.
== Plan ==
* TSAN support for Aarch64.
* Fix Linaro Bug 863
AMD internal event on 18th (full day)
== Progress ==
* Compiler-pass to widen computation to back-end promoted mode (2/10)
- Looking at generated code with benchmarks
- some benchmark analysis with coremark
* https://cards.linaro.org/browse/TCWG-486 (3/10)
- Reviewed Zhenqiang's and Dmitry's patches and experimented
- I have at lease one case which is not working with Zhenqiang's patch
* MISC (1/10)
- Scanned gcc-patches and bug database
* Holiday (4/10)
== Planned Leave ==
* 11/12/2014 to 24/12/2014
== This week ==
* GCC Modularization project:
- Completed flattening df.h.
- Completed testing cfgloop.h on all targets in config-list.mk
- Completed flattening expr.h.
== Next week ==
- Modify df.h flattening patches based on Michael's review.
- Start working on flattening rtl.h.
== Progress ==
* Automation Framework (CARD-1378 5/10)
- Getting around fastboot issues on Dragon
- Upgrading Dragons to 3.17 / utopic
- Testing stability of Dragon boards once again
- Writing best practices, and lab setup documents
- Liaising with ST and Qualcomm to stress their boards
* Buildbots (TCWG-76 2/10)
- Investigating AArch64 compiler-rt issue
- Bisecting test-suite bot failure
* Release 3.5.1 (TCWG-477 1/10)
- Running validation on ARM and AArch64
* Background (2/10)
- Code review, meetings, discussions, etc.
- Helping Christophe and Will with LLVM stuff
== Plan ==
- Finish 3.5.1 validation
- Continue investigating test-suite failure
- Follow up on AArch64 compiler-rt issue
- Lab stuff for sure...
== Progress ==
* Off sick Monday (2/10)
* LLD for AArch64 (4/10, TCWG-563)
- Commited a few patches for reloc tests
- Working on a patch to improve relocation range checking
* ILP32 work (3/10)
- Merged gettext 0.19.3 into glibc. This should fix build failures
with bison 3.x
- Various test builds on Juno
* Email, meetings, reading docs etc. (1/10)
== Issues ==
* None
== Plan ==
* Submit LLD relocation range checking patch
* Tidy up loose ends from gettext merge
* Figure out why native ILP32 toolchain build fails
--
Will Newton
Toolchain Working Group, Linaro
== Progress ==
* GCC trunk/4.9 monitoring (1/10)
- still tracking cause of random "interrupted system call" errors
- flagged a few wrong new Neon testcases
* AArch64 sanitizers (1/10)
- documented build process (based on configure) works on aarch64,
but still unable to run the sanitizer tests
- using supposedly up-to-date but undocumented build process (cmake)
fails when configuring sanitizers libs
- started discussion with upstream, no progress yet
* Neon intrinsics tests (3/10)
- continued conversion to GCC testsuite
- checks for Neon QC flags need fixing
* Misc (5/10)
-meetings, conf-calls, emails, ....
== Next ==
* GCC trunk/4.9 monitoring
* AArch64 sanitizers
* Neon intrinsics tests
* cbuild2/abe: look at backport and tcwgweb
The Linaro Toolchain Working Group (TCWG) is pleased to announce the 2014.12
release of the Linaro GCC 4.9 source package.
Linaro GCC 4.9 2014.12 is the ninth Linaro GCC source package release. It is
based on FSF GCC 4.9.3-pre+svn218412 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. The Linaro TCWG provides
stable[1] quarterly releases and monthly enginering[2] releases.
Interesting changes in this GCC source package release include
* Updates to GCC 4.9.3-pre+svn218412
* Backport of [AArch64] arm_neon.h - add vpaddd_f64, vpaddd_s64,
vpaddd_u64 intrinsics
* Backport of [AArch64] Move some code around in aarch64_expand_mov_immediate
* Backport of [AArch64] Improve codegen of vector compares inc. tst instruction
* Backport of [AArch64] Remove vector compare/tst __builtins
* Backport of [AArch64] Add execution tests of vget_low and vget_high
* Backport of [AArch64] Replace temporary inline assembler for vget_high
* Backport of [AArch64] PR 61749: Do not ICE in lane intrinsics when
passed non-constant lane number
* Backport of [AArch32] Disable xordi3-opt.c/iordi3-opt.c on thumb1 target
* Backport of [AArch64] Fix scan-assembler test false alarm on aarch64-linux-gnu
* Backport of [AArch64] Add test of vld[234]q? intrinsic
* Backport of [AArch64] Extend test of vld1+vst1 intrinsics to cover
more variants
* Backport of [AArch64] Add a test of vldN_dup intrinsics
* Backport of [AArch64] Add a test of the vldN_lane intrinsic
* Backport of [AArch64] Add a test of the vst[234](q?) intrinics
* Backport of [AArch64] Add execution test of vset(q?)_lane intrinsics.
* Backport of [AArch64] Add cost handling of CALLER_SAVE_REGS and POINTER_REGS
* Backport of [AArch64] Fix cost for Q register moves
* Backport of [AArch64] Add regmove_costs for Cortex-A57 and A53
* Backport of [AArch64] Add aarch64 to list of targets that support gold
* Backport of [testsuite] whole_vector_shift
* Backport of [testsuite] vect-reduc-or
* Backport of [testsuite] Fix race in libstdc++ testsuite
* Backport of [testsuite] update testcases for GNU11
* Backport of [testsuite] fix gcc-dg-prune glitch when filtering
"relocation truncation" error
* Backport of [testsuite] Update testcases for GNU11
* Backport of [testsuite] fix wrap_compile_flags
* Backport of Increase PARAM_MAX_COMPLETELY_PEELED_INSNS when branch is costly
* Backport of Add -mthunderx option
* Backport of Accept cortex-m7/fpv5-sp-16/fpv5-d16
* Backport of Remove unused variable and marco
* Backport of Target Legitimize Address
* Backport of Hookize and remove *_BY_PIECES_P
* Backport of Remove no-longer-needed fp-bit target macros.
* Backport of Fix CLZ_DEFINED_VALUE_AT_ZERO for vector modes
* Backport of ifcvt: Allow CC mode if HAVE_cbranchcc4
* Backport of Fix predicate and constraint mismatch in logical atomic operations
* Backport of Migrate to new reduc_plus_scal_optab
* Backport of Migrate to new reduc_[us](min|max)_scal_optab
* Backport of Change CORE_REGS in GENERAL_REGS
* Backport of Fix IRA ICE tmpdir-gcc-.dg-struct-layout-1/t028
* Backport of Fix IRA ICE tmpdir-gcc-.dg-struct-layout-1/t028 -addon
* Backport of PR target/63937 fix 216996
* Backport of PR rtl-optimization/63210 IRA
* Backport of PR 63173 fix vldX_dup
* Backport of PR 63442 libgcc_cmp_return_mode not always return word_mode
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 bugzilla against GCC product:
http://bugs.linaro.org/enter_bug.cgi?product=GCC
* 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.
Folks,
Me and Nick have been back and forth with the IFC6410, using Linaro's
utopic Ubuntu + 3.17 kernel, and I can now declare it stable enough to
run toolchain tests, maybe not yet builds.
The reason is that the kernel, although stable, is only just because
it throttles speed to a minimum. So, the core runs at 920MHz and the
memory bus is at its minimum frequency. Nick gathers we could speed it
up by a factor of 30% and 40% respectively while remaining on the
safety zone.
However, that would still be not enough. Currently, the boards build
LLVM in 7hs, when a Panda does it in 5h, a Chromebook does in 3.5hs
and a Chrome2 in 2hs. Improving it by 85% would get us just under 4hs,
which is still worse than a Chromebook. If we increase the CPU clock
to 1.5GHz per core, we may get it fast enough (but still slower than
the Chrome2), to be useful.
Their form-factor are better for rack-usage (remote serial, remote
reboot, small footprint), so even being slower than Chrome 2s, they'll
be faster than Chrome 1s and much more rack-friendly. That, of course,
assuming they remain stable at 1.5GHz. Heating will be an issue, but
we now have a decent server room and we can buy rack-mounted fans for
them, if we need it.
In a nutshell, I won't give up on them just yet, but I won't speed up
replacing the other boards with them either. We may have to wait a few
more releases to be sure, but I'm not expecting anything going in
production before February.
cheers,
--renato
PS: Nick, if you want to increase the clock speeds now just to see
what happens, I'm game.
Hi,
The latest toolchain on the following page appears to be broken.
http://www.linaro.org/projects/armv8/
Looking around one comes across the following path.
http://releases.linaro.org/latest/components/toolchain/.binaries
However the tarballs there yield: "You do not have permission to access this
file."
Thanks,
Chris
--
Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
== Progress ==
QEMU kernel debugging setup [5/10] [TCWG-568]
-- Setup arm Linux kernel debugging to debug watchpoints
GDB with cygwin build/testing process [2/10]
-- Figured out GDB build and test procedure on cygwin.
Miscellaneous [3/10]
-- Meetings, Emails etc
-- Hong Kong visa application: re-submission of application.
== Plan ==
QEMU kernel debugging setup [TCWG-568]
-- Try to figure out kernel debugging help for ptrace debug
GDB with cygwin build/testing process
-- Document cygwin gdb work flow
-- Buid arm-remote gdb on cygwin
-- Identify gdb-remote issues on a cygwin host if any
== This week ==
* GCC modularization project
- Fixed df.h flattening patch to build on all targets in config-list.mk
- Flattening expr.h patch in progress.
== Next week ==
- complete expr.h patch
- Submit df.h flattening patch to gcc-patches for review
- Test cfgloop.h flattening patch on all targets with ISL enabledin
config-list.mk and submit to gcc-patches for review.
Holiday [6/10]
Misc [3/10]
* Mail backlog
* Moved all current AArch64 work off 'my' Juno, as ARM needed it back
* A little bit of a look at another possible memcpy performance issue
libm exercising - TCWG-558 [1/10]
* Reduced 'needless calls to pow' to a simple test case
** Found that this is actually an all-targets thing (at least AArch32,
AArch64, x86)
* Looked through benchfft output
** Looks like only one implementation calls libm much
** This is probably just bad code, but could do with a comparison run
on non-AArch64 to be sure
=Plan=
Switch to TCWG Junos
Think about where to go next with libm exercising
Complete 'same network' workaround, test benchmark repeatability
Port benchmarking scripts to ABE repo
Get storage/automation started, if Rob has time
=Absences=
On holiday Monday 22nd Dec to Friday 2nd Jan
== Progress ==
Bug#403/#418/PR63870 [7/10]
. Prepared patches for vldN_lane/vstN_lane
. reviewed related patches on list
. code changes are ready, but reveal errors in the testsuite
Misc [3/10]
. mailing llists
. meetings
. some help with lab config with Renato
= Progress ==
* TSAN support for Aarch64 (6/10)
* Emails, linaro/AMD status meetings. (4/10)
1-1 with maxim, Christophe.
== Plan ==
* TSAN support for Aarch64.
* Fix Linaro Bug 863
== This week ==
* GCC Modularization Project (9/10)
- Flattening header files
- tree-core.h, and tree.h, c-common.h
- Completed
- Bootstrap successful on x86
- Testing in progress on all platforms listed in config-list.mk
- Reviewed and tested patches from Prathamesh
* Misc (1/10)
- Conference calls
== Next week ==
- Submit tree.h and related patches for review
