== Issues ==
* None
== Progress ==
* Commit the fix for lp:1243022 on trunk.
* Backporting r203603, r204247 and r203267 to Linaro gcc 4.8.
* Updating CCMP patch according to comments.
* Collect spec2K result for CCMP.
- Overall there is no regression and no improvement.
- 175.vpr is sensitive to branch cost. Smaller branch cost will lead
to regression for it even with CCMP.
* Investigate bare metal arm-none-eabi A profile multilib build.
- Need fix the conflict with current multilib support for arm-linux-gnueabihf
- Need scripts and config update to meet the check of
--with-multilib-list=aprofile
- A reference build is shared at
http://cbuild.validation.linaro.org/snapshots/aprofile-baremetal.tar.bz2
== Plan ==
* Continue on CCMP.
* Update Linaro crosstool-ng for bare metal A profile multilib build.
== Progress ==
(TCWG-266), (TCWG-270), (TCWG-250), (TCWG-280) and (TCWG-288)
* Arm process record:
- Created Patches for all fixes and features.
- Performed testing in arm native and remote configuration.
- Performed regression testing on arm and x86.
- Submitted all fixes in three patch series.
* Performed GDB testsuite run on arm and x86 to get current status with new
patches.
There seems to be more test passing on arm than x86 with recent patches.
* Prepare for connect and travel to Santa Clara.
== Plan ==
* Linaro Connect US 2013
== Progress ==
* Got Odroid XU board stable by using Arch Linux. None of the
Ubuntu derived images worked more than barely. Tried a suggested
hack to use cpufreq-set -g performance, which allowed a fresh
install of saucy to work. Did new builds and test run.
* Got remote toolchain testing working on the newly functioning
Odroid board(s) and chromebook. Currently baseboard support is in
a DejaGnu branch,
http://git.savannah.gnu.org/cgit/dejagnu.git/?h=linaro. I'm
adding the global site.exp file to Cbuildv2, so 'make check'
executes tests via ssh on remote targets.
* Uploaded test results of ARM native builds to
cbuild.validation.linaro.org for tcwg-web. (look for version
gcc-linaro-4.8-2013.10.24)
* Added support to DejaGnu to use a custom port for ssh and scp.
* Survived learning to use Concur for expense reports.
== Plan ==
* Attend Connect, do presentation, go to others.
* Try to work around problem with importing test results. (need to
work with LAVA team for this one, will do at Connect)
* Copy tarballs to snapshots.linaro.org. (need to work with LAVA
team for this one, will do at Connect)
== Issues ==
* I see to be having random stability issues with the two Odroid
boards, although did manage to complete a test run of a the
execute tests.
== Progress ==
* Ongoing refactoring of malloc to improve performance
* Preparation for Connect
== Issues ==
* None
== Plan ==
* Linaro Connect US
--
Will Newton
Toolchain Working Group, Linaro
== Progress ==
* Getting ready for Connect & LLVM US
* Stride Vectorization
- Added some logic to detect read/write reduction, possibly not the best
solution
- Consolidating all discussion into a single document for easy referral
- Creating several bugs (PR17673,PR17677,PR17678,PR17679,PR17680,PR17681)
* Re-Vectorizing
- A bug was passing the vectorizer again on an already vectorized loop
(PR17662)
- http://llvm-reviews.chandlerc.com/D2011, commit r193349
* Odroid XU
- Running more stable now, self-hosting doing well (more than a week on
24/7)
* Background
- Lots of patch reviews
- Lots of discussions about stride vectorization and others
== Plan ==
* Connect US next week
* US LLVM Dev Meeting the following
* Will be back in 2 weeks
== Issue ==
* Can not attend LCU'13 due to slow US Visa process.
== Progress ==
* Investigate lp:1243022:
- Root cause: REG_INC note is lost in subreg2 pass, so ira gets
wrong result in function validate_equiv_mem.
- Work out a patch for community review.
* Send conditional compare (CCMP) patch for community review.
- Benchmark testing is ongoing.
* Investigate heuristics to control ifcombine. Basically it will take
branch taken probability, frequency, branch-cost and basic block
reorder into account.
== Plan ==
* Performance tuning for CCMP.
== Issues ==
* None.
== Progress ==
* 2013-10 release.
- Backports and branch merges reviews.
* LRA on AArch32:
- Committed patch to enable LRA with the -mlra flag (disabled by default).
- Created 2 bugzilla entries for Thumb and address issues.
- Thumb issue work still ongoing.
* Launchpad bugs:
- Cleaned up a couple of them.
* Misc:
- Internal meetings.
== Next ==
* Short week (2 days off and 1 travelling)
* LRA
Hi,
may you think I'm on the wrong list, no not :-)
I currently build my u-boot loader using the linaro tool chain 2013.09
and run into a problem with the support for JFFS2 where the linker report
VFP usage where u-boot using softfp for build.
compiler options: -ffixed-r9 -msoft-float
arm-linux-gnueabihf-ld.bfd: error:
/opt/armhf/gcc-linaro-arm-linux-gnueabihf-4.8-2013.09_linux/bin/../lib/gcc/arm-linux-gnueabihf/4.8.2/libgcc.a(bpabi.o)
uses VFP register arguments, u-boot does not
when I use
make USE_PRIVATE_LIBGCC=yes
the problem shows up at an undefined reference
fs/jffs2/libjffs2.o: In function `jffs2_1pass_build_lists':
/opt/cross_build/uboot.d/u-boot-git/fs/jffs2/jffs2_1pass.c:1441: undefined
reference to `__aeabi_uldivmod'
arm-linux-gnueabihf-ld.bfd: BFD (crosstool-NG linaro-1.13.1-4.8-2013.09 - Linaro
GCC 2013.09) 2.23.2.20130610 Linaro 2013.06 assertion fail
/cbuild/slaves/oorts/crosstool-ng/builds/arm-linux-gnueabihf-linux/.build/src/binutils-linaro-2.23.2-2013.06/bfd/elf32-arm.c:7687
may someone have a closer look into it?
thanks
Chris
Hi,
On 4 October 2013 19:01, Maxim Uvarov <maxim.uvarov(a)linaro.org> wrote:
> On 10/04/2013 07:40 PM, Victor Kamensky wrote:
>>
>> Hi Maxim,
>>
>> readl and writel are stronger version of readl_realxed and
>> writel_relaxed:
>>
>> #define readl(c) ({ u32 __v = readl_relaxed(c); __iormb(); __v; })
>> #define writel(v,c) ({ __iowmb(); writel_relaxed(v,c); })
>>
>> They just add __iormb and __iowmb, I think it is very
>> dangerous thing to drop those memory barriers. I don't
>> think your change is correct and/or it requires way
>> better explanation.
>>
>> I've run into the same crash while working on 3.12-rc3 BE
>> issues. In fact I saw this failure on both BE and LE and on
>> old versions of BE kernels when I tried to use 4.8 gcc version
>> from 13.09 release. When I fall back to 4.7 (i.e 13.04) it
>> works fine
>>
>> I would think it is compiler issue or preexisting issue
>> in the code uncovered by compiler change. Personally
>> I think it is the first. Since I am chasing another problem
>> I did not have time to look more deeply into the issue.
>> IMHO it definitely require more digging. In mean time you
>> can quickly check your current version and try another one
>> if your looks as one described in this email.
>>
>> Thanks,
>> Victor
>
> Ah, yes, it __raw_write has direct access and writel swaps bits.
>
> If it's compiler issue then it has to be simple to compare objdump disasm
> output for that function.
I think I've hit this issue. We use latest Linaro GCC 4.8 in the CI
loop to build Arndale BE kernel.
Is there a bug reported to TCWG? If not, please create one:
https://bugs.launchpad.net/gcc-linaro/+filebug
FYI, I'm using Linaro GCC 4.8-2013.09 (pre-built) and latest
linaro-linaro (based on 3.12-rc5 with Victor's topic branch). Boot log
attached.
Cheers,
Fathi
