- linaro-toolchain - lists.linaro.org

[ACTIVITY] 25-29 March 2013

by Christophe Lyon

== Progress == * Disable-peeling: - benchmarked locally on snowball. Observed a few regressions in spec2k. To be analyzed and confirmed with the results from cbuild. - patched cbuild to work-around a bzr bug which prevented these jobs from being spawned. * Libsanitizer: sent patch upstream. Discussion about interactions with qemu. * Revert-coalesce: spawned thought-to-be reference jobs for benchmarking. * Neon intrinsics codegen: - First analysis of sample codecs seems to indicate that gcc generates sequences of interdependent instructions where rvct manages to insert some code in between. - To be confirmed by dedicated benchmarking, probably in bare-machine mode. * Neon intrinsics testsuite: - Added support for polynomial variants (*_p8, *_p16) - Identified wrong code generated by gcc-linaro-4.7; did not check with trunk. - Transforming into a dejagnu forms will probably be a lot of work :-( * Internal activities == Next == * Disable-peeling: - analyze bench results from cbuild when available - compare with the results from my snowball * Libsanitizer: - resume investigation about isatty problem when ran under qemu. * Turnoff 64bits ops In Neon: - backport in linaro-4.8 once the process has been clarified. * Revert-coalesce: - check bench results * Neon intrinsics codegen: - perform dedicated benchmarking

13 years, 4 months

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[ACTIVITY] Week 13

by Will Newton

== Progress == * Booked flight for LCE. * Benchmarked and ran tests on new memcpy implementation. * Attempted but failed to get new memcpy tested on big endian (still todo). * Committed new memcpy implementation to cortex strings. * Passed new memcpy to Android team for bionic. * Submitted newlib patch for new memcpy. * Committed binutils ld-elfvsb testsuite fixes, native testsuite now green! * Further investigation of IFUNC in glibc. == Issues == * Pandaboard ES still a bit flakey, Chromebook hopefully on its way to replace it. == Plan == * Iron out issues with native binutils make check in cbuild/LAVA. * Get newlib memcpy patch committed. * Investigate testing memcpy on big endian (qemu user, models?). * IFUNC... -- Will Newton Toolchain Working Group, Linaro

13 years, 4 months

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[ACTIVITY] report week 13

by Peter Maydell

Progress: * qemu maintenance ** https://ci.linaro.org/jenkins/job/qemu-ltp/ now shows graphs of LTP test results for linux-user mode ** rebased qemu-linaro and got it working again (omap3 display code needed rework after upstream changes) ** investigated why Christoffer Dall's kernels weren't booting: turns out to be that vexpress now requires CONFIG_REGULATOR but doesn't force it to be set or set it in the vexpress_defconfig ** rebased/resent/pinged various in-flight patches * VIRT-4 [Guest migration support for KVM] ** VIRT-49: implement cp15 sync with kernel *** located my work on this from last year, refreshed my memory on how far I'd got and what I was planning to do -- PMM

13 years, 4 months

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[ACTIVITY] week 13

by Renato Golin

== Progress == * Re-installed the panda buildbot, using USB drive as bot dir * Reviewing lots of ARM patches (more than usual) * Trying Arndale again, some errors, some passes, cooler might be responsible - Got one internal error, one build error and one pass with Ubuntu kernel + patch - Trying Suse image: - It has a broken serial driver (makes things much harder) - sshd does not start by default (in conjunction with serial bug, it's a killer) - Now running on a precarious mode, hopefully enough for our needs * sqlite3 error due to VMUL.f64 while on x86_64 "long double" is f128 - sqlite3 is the best example on what NEVER to do with floating point values >:| - Sent patch, working around TILE-Gx issues == Issues == * Still a bit ill, productivity reduced * Not having a wired network on my desk wastes a LOT of my time == Plan == * Push the sqlite3 patch though * Continue fixing the 4 remaining broken tests * Continue with Arndale investigation with Christophe and Zhenqiang

13 years, 4 months

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GCC bootstrap on Arndale

by Renato Golin

Hi folks, I'm trying again the bootstrap of GCC on Arndale and it goes pretty well until it has to install libgcc that it just compiled. When I build first time, I get an error while installing libgcc: make[4]: Entering directory `/home/linaro/devel/gcc/build/objs/armv7l-unknown-linux-gnueabihf/libgcc' /bin/bash /home/linaro/devel/gcc/src/libgcc/../mkinstalldirs ../.././gcc (...) /bin/bash /home/linaro/devel/gcc/src/libgcc/../mkinstalldirs ../.././gcc; /usr/bin/install -c -m 644 ./libgcc_s.so.1 ../.././gcc/libgcc_s.so.1; rm -f ../.././gcc/libgcc_s.so; /usr/bin/install -c -m 644 ./libgcc_s.so ../.././gcc/libgcc_s.so Live child 0x01dec548 (install-shared) PID 4405 Reaping losing child 0x01dec548 PID 4405 make[4]: *** [install-shared] Error 1 Though, if I run that command by hand, it works... I then re-ran make and the first point there is an error is on gmp: This program built for arm-unknown-linux-gnueabihf Reading makefiles... Reading makefile `Makefile'... Reaping losing child 0x01866320 PID 4784 make[3]: *** [config.h] Error 1 Removing child 0x01866320 PID 4784 from chain. make[3]: Leaving directory `/home/linaro/devel/gcc/build/objs/gmp' Need a job token; we have children Duplicate the job FD Live child 0x00ae17f8 (all-stage1-libiberty) PID 4755 Live child 0x00be3508 (all-stage1-gmp) PID 4736 Reaping losing child 0x00be3508 PID 4736 make[2]: *** [all-stage1-gmp] Error 2 Removing child 0x00be3508 PID 4736 from chain. Released token for child 0x00be3508 (all-stage1-gmp). make[2]: *** Waiting for unfinished jobs.... Live child 0x00ae17f8 (all-stage1-libiberty) PID 4755 I can't notice anything wrong on gmp (all objects are there), other than a number of symlinks to a missing directory: gmp-mparam.h -> /home/linaro/devel/gcc/src/gmp/mpn/generic/gmp-mparam.h the directory "generic" doesn't exist, and lots of files in "mpn" also point there. Could be a red herring, though. Any ideas? cheers, --renato PS: this doesn't look like an Arndale specific bug, so we might still be able to use them for GCC bootstrapping...

13 years, 4 months

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[PATCH][for-danny] external-linaro-toolchain-versions: OE variables need to be properly expanded

by Denys Dmytriyenko

From: Denys Dmytriyenko <denys(a)ti.com> Otherwise eglibc version is set to UNKNOWN. Similar fix is already in master. Signed-off-by: Denys Dmytriyenko <denys(a)ti.com> --- conf/distro/include/external-linaro-toolchain-versions.inc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/conf/distro/include/external-linaro-toolchain-versions.inc b/conf/distro/include/external-linaro-toolchain-versions.inc index 6b5a6fb..8e2c68c 100644 --- a/conf/distro/include/external-linaro-toolchain-versions.inc +++ b/conf/distro/include/external-linaro-toolchain-versions.inc @@ -43,7 +43,7 @@ def elt_get_libc_version(d): if not syspath: return 'UNKNOWN' - libpath = syspath + '/libc/lib/${ELT_TARGET_SYS}/' + libpath = syspath + bb.data.expand('/libc/lib/${ELT_TARGET_SYS}/', d) if os.path.exists(libpath): for file in os.listdir(libpath): -- 1.8.1.5

13 years, 4 months

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[ACTIVITY] Week 12

by Zhenqiang Chen

Summary: * Send out shrink-wrap related patches for review. * Investigate how to add a new tree code. Details: 1. Fix lp:1157050 and lp:1107659 for Linaro toolchain binaries. 2. Test shrink-wrap dwarf/unwind info and send out the patches for review. 3. Make progress on conditional compare support. With some hard-codes in gcc, it can gimplify a small case to conditional compare on tree and no assert until expand. Plan: * Investigate how to expand conditional compare GIMPLE to RTL and emit asm. Planned leaves: * March 31. * April 4-8. Best Regards! -Zhenqiang

13 years, 4 months

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Testing binutils natively

by Will Newton

Hi all, I'd like to run the binutils testsuite in a native configuration regularly to find any regressions. Do we have any infrastructure for doing this? It looks like LAVA would be useful but it looks complex and I am not sure if we use that already for running toolchain tests (I think there was a Connect session about that?). Thanks, -- Will Newton Toolchain Working Group, Linaro

13 years, 4 months

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[ACTIVITY] 18-22 March 2013

by Christophe Lyon

== Progress == * Disable-peeling: - benchmarking locally on snowball - failed to build reference branch on cbuild, for an unknown reason * Turnoff 64bits ops in Neon: - committed upstream in 4.9 (now stage 1) - benches of backport into Linaro-4.7 OK: no significant diff, except +12.6% on spec2k's crafty) - Filed merge request. * Vectorizer cost model: - benches of backport inot Linaro-4.7 OK (no significant diff, as expected). - Filed merge request. * Revert-coalesce: - benches ran in cbuild, but no *-diff.txt file generated. * Libsanitizer: - testsuite results OK. All unsupported tests are normal. * Neon intrinsics codegen: - got internal feedback * GDB reverse debug: - filed 2 bug reports after internal requests. * Misc: - filed several bug reports against cbuild to track the problems I observed. == Next == * Disable-peeling: - analyze bench results - understand/'fix what's wrong with cbuild * Turnoff 64bits ops in Neon: - backport to Linaro-4.8 * Revert-coalesce: - manually compute bench differences if unable to have cbuild do it. * Libsanitizer: - propose patch upstream.

13 years, 4 months

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[ACTIVITY] 18 - 22 March 2013

by Omair Javaid

== Progress == Knocked out more GDB remote configuration failures that were failing due to timeouts. Had 1:1 with Matt for direction on GDB improvement plan. Looked around for Ireland visa process and filled out visa application. == Plan == Complete review of remote timeout based test case failures. Start work on the GDB improvement blueprint in JIRA from this week. Get remaining documentation for Ireland visa and complete application.

13 years, 4 months

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[ACTIVITY] 18-22 March 2013

by Venkataramanan Kumar

== Progress == - Looking at TLS relocs and coming up with test cases for garbage collecting them. - Patch for missedout testcases in gc section is up streamed. Thanks to Marcus. == Plan == - Complete gc section test cases for TLS relocs. - Understand and evaluate gprof support work for Aarch64 Misc ----- Leave on Wednesday and Thursday (27th and 28th)

13 years, 4 months

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[ACTIVITY] 18-22 March 2013

by Kugan

== Progress == - Worked on VRP based zero/sign extension elimination at tree level - Some regression test cases are failing; investigating them == Plan == - Analyse the reason for test case failure and fix them - Extend the code to handle all the possible cases (currently implemented for subset to get the framework working)

13 years, 4 months

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Regehr: GCC 4.8 Breaks Broken SPEC 2006 Benchmarks

by Mans Rullgard

This post is making the rounds today: http://blog.regehr.org/archives/918 -- Mans Rullgard / mru

13 years, 4 months

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[ACTIVITY] Week 12

by Yvan Roux

== Issues == * None == Progress == * Libunwind AArch64 support: - basic implementation for building lib and testsuite done - but even a simple test case doesn't work for the moment == Plan == * Libunwind AArch64 support: - continue AArch64 specific implementation and informtation gathering

13 years, 4 months

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[ACTIVITY] Week 12

by Renato Golin

== Progress == * EuroLLVM paper review * Disabled EH tests on ARM for now * Fixed TSVC: NEON vs. VFP VMUL.f32 (and IEEE 754 correctness) * Changed FeatureNEONForFP to false on EABI ARM targets unless unsafe-math * Trying Arndale again, with u-boot patched, not good * Broken Panda buildbots, trying to fix == Issues == Got ill on Tuesday and only worked partially, if at all, the rest of the week Hopefully will be better next week... == Plan == * Fix our panda buildbot, maybe add more * Final try on Arndale GCC bootstrap before giving up * Continue fixing test-suite failures (only 5 left)

13 years, 4 months

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[ACTIVITY] report week 12

by Peter Maydell

Progress: * VIRT-4 [Guest migration support for KVM] ** VIRT-51: vexpress migration: ** wrote and submitted patches for all the devices that need fixes ** tracked down a painful bug where the guest just hung on vmload to a missing state-save for a timer device, submitted patch ** remaining work for this item is just responding to patch review -- PMM

13 years, 4 months

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LLVM ARM NEON VMUL.f32

by Renato Golin

Hi folks, I found an issue while fixing a test using the wrong VMUL.f32, and I'd like to know what should be our choice on this topic that is slightly controversial. Basically, LLVM chooses to lower single-precision FMUL to NEON's VMUL.f32 instead of VFP's version because, on some cores (A8, A5 and Apple's Swift), the VFP variant is really slow. This is all cool and dandy, but NEON is not IEEE 754 compliant, so the result is slightly different. So slightly that only one test, that was really pushing the boundaries (ie. going below FLT_MIN) did catch it. There are two ways we can go here: 1. Strict IEEE compatibility and *only* lower NEON's VMUL if unsafe-math is on. This will make generic single-prec. code slower but you can always turn unsafe-math on if you want more speed. 2. Continue using NEON for f32 by default and put a note somewhere that people should turn this option (FeatureNEONForFP) off on A5/A8 if they *really* care about maximum IEEE compliance. Apple already said that for Darwin, 2 is still the option of choice. Do we agree and ignore this issue? Or for GNU/EABI we want strict conformance by default? GCC uses fmuls... cheers, --renato

13 years, 4 months

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ARMV8 gcc toolchain issue while compiling for a foundation model

by pavan p m

Hello, I am having an issue with using the gcc toolchain for armv8. I am trying to cross compile a simple program (helloworld.c) as suggested in the link : https://wiki.linaro.org/HowTo/HelloAarch64. But when I try executing the binary on the simulated armv8 (using foundation model), I am getting error in GLIBC, specifically "/lib/libc.so.6: version `GLIBC_2.16' not found" . Could you please help me as to what could be wrong here? Thanks, Pavan

13 years, 4 months

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[ACTIVITY] 11-15 March 2013

by Will Newton

== Progress == * Analyzed Android kernel linker issue and created LP #1154165 to track it. * Triaged remaining binutils Launchpad tickets. * Setup my Pandaboard with Linaro 13.01 (13.02 oopses on boot) to run tests. * binutils: Committed fix for LP #517081 (Floating-point assembly and disassembly bugs on armel) upstream. * binutils: Committed a fix for ARM EABI tests upstream. * Lots of admin stuff. == Plan == * Get binutils testsuite green in a native configuration (fix LP #812276). * Investigate getting binutils testuite automated via cbuild/Lava. * More bugs... -- Will Newton Toolchain Working Group, Linaro

13 years, 5 months

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[ACTIVITY] 11 - 15 March 2013

by Omair Javaid

== Progress == Reviewing GDB tests that FAIL due to timeout problems in remote configuration. Made some changes to some of the GDB tests that FAIL on arm targets to check if they work by minor modifications. Sick Days: Had been sick due to cough n fever and a drop in blood pressure made me take most part of Thursday and Friday off. == Plan == Get with Matt for Post- Connect work targets. Review remaining GDB tests that FAIL due to timeout problems in remote configuration. Further experiments with GDB test suite to check support for unsupported tests on arm.

13 years, 5 months

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Linaro Toolchain Binaries 2013.03 released

by Bernhard Rosenkränzer

The Linaro Toolchain and Platform Working Groups are pleased to announce the 2013.03 release of the Linaro Toolchain Binaries, a pre-built version of Linaro GCC and Linaro GDB that runs on generic Linux or Windows and targets the glibc Linaro Evaluation Build. Uses include: * Cross compiling ARM applications from your laptop * Remote debugging * Build the Linux kernel for your board What's included: * Linaro GCC 4.7 2013.03 * Linaro GDB 7.5 2012.12 * A statically linked gdbserver * A system root * Manuals under share/doc/ The system root contains the basic header files and libraries to link your programs against. Interesting changes include: * gcc updated to 4.7-2013.03: * Updates to GCC 4.7.2+svn196272 * Includes arm/aarch64-4.7-branch up to svn revision 196225 * A fix for LP #1135633: [linaro regression] alsa-tools FTBFS with error "unable to find a register to spill in class ‘AREG’" The Linux version is supported on Ubuntu 10.04.3 and 12.04, Debian 6.0.2, Fedora 16, openSUSE 12.1, Red Hat Enterprise Linux Workstation 5.7 and later, and should run on any Linux Standard Base 3.0 compatible distribution. Please see the README about running on x86_64 hosts. The Windows version is supported on Windows XP Pro SP3, Windows Vista Business SP2, and Windows 7 Pro SP1. The binaries and build scripts are available from: https://launchpad.net/linaro-toolchain-binaries/trunk/2013.03 Need help? Ask a question on https://ask.linaro.org/ Already on Launchpad? Submit a bug at https://bugs.launchpad.net/linaro-toolchain-binaries On IRC? See us on #linaro on Freenode. Other ways that you can contact us or get involved are listed at https://wiki.linaro.org/GettingInvolved.

13 years, 5 months

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[ACTIVITY] 13-15 March 2013

by Yvan Roux

Short week to ... == Progress == * Configured GCC testsuite to run on the Foundation model. * Boehm GC AArch64 support: - Submitted gc integration patch in GCC upstream for review. - libatomic_ops AArch64 support branch re-tested and merged in mainline. == Next == * AArch64 libunwind support.

13 years, 5 months

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[ACTIVITY] 11-15 March 2013

by Venkataramanan Kumar

== Progress == - Closed the blue print for gc-sections implementation since the patch got upstreamed. - Opened new blue print for adding more test coverage to gc-sections tests. - Submitted a patch to enable missed out gc-sections test cases from ld-elf group. - Wrote gc-sections test cases for few GOT related relocs. == Plan == - Understand equivalences created during CFG traversal for jump threading. - Look at GCC code for a simple test case where jump threading is missed out. - Continue writing gc-sections test cases for remaining relocs.

13 years, 5 months

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[ACTIVITY] 12-15 March 2013

by Kugan

== Progress == - Monday was a public holiday - Studied benchmarks and analysed the rtl/asm for redundant sign extensions - Came up with simple test cases based on this (have 6 test cases now) - Looked at gcc tree documentations and helper macros; tried it by adding more debug dumps for types at tree level == Plan == - Start with the algorithm for sign extension elimination - Skipping manual changes at source level/asm level to see the performance improvement for now.

13 years, 5 months

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[ACTIVITY] 13-15 March 2013

by Christophe Lyon

Short week... == Progress == * Catch up on internal tasks / email that piled up during holidays + Connect * Resumed work on disable-peeling: - local benchmarking on snowball - restarting benchmarks via cbuild for an additional check == Next == * Check benchmark results on disable-peeling * Have a look at how to dejagnu-ize my Neon intrinsic tests * Check results of libsanitizer branch * Check results of 'revert-coalesce' branch * Check bench results of '4.7-backport-vect-cost-model' * Check bench results of '4.7-turnoff-64bits-ops' * Investigate why cbuild did not generate all the comparisons I expected (*-diff.txt files) * Check whether 2013.03 release process exposed the same problems I observed with 2013.02.

13 years, 5 months

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