- linaro-toolchain - lists.linaro.org

[ACTIVITY] 2011-07-22

by David Gilbert

== 64 bit atomics == * Updated gcc patches as per comments from Ramana and Joseph; build currently cooking on Panda == Qemu == * Testing Peter's pre-release, finding bug on beagle (that he tracked down to x-loader change) * Found cause of occasional SD card errors I was seeing (SD: CMD12 in a wrong state); I'll cut a patch next week, but the bug is writing the last sector throws an error and also leaves it in the wrong state * Added a bunch of tracing code to the SD card layer * With the tracing code and fixing the other bug I'm starting to understand how it works - and half a dozen reasons that the emulation is really slow; whether that's the cause of the reported recoverable lock ups under load is an interesting question; I plan to fix the obvious problems and see how it goes. Dave

14 years, 9 months

1
0
0 0

[ACTIVITY] Jul 18 - Jul 22

by Ulrich Weigand

== GDB == * Committed mainline patch to fix re-built executable remote test problems (#804392). * Committed two more mainline patches to fix remote test issues. == GCC == * Patch review. * Determined root cause of bug #809768 (ICE in bionic libm). Mit freundlichen Gruessen / Best Regards Ulrich Weigand -- Dr. Ulrich Weigand | Phone: +49-7031/16-3727 STSM, GNU compiler and toolchain for Linux on System z and Cell/B.E. IBM Deutschland Research & Development GmbH Vorsitzender des Aufsichtsrats: Martin Jetter | Geschäftsführung: Dirk Wittkopp Sitz der Gesellschaft: Böblingen | Registergericht: Amtsgericht Stuttgart, HRB 243294

14 years, 9 months

1
0
0 0

[Activity] Week ending 22 July 2011.

by Ramana Radhakrishnan

== GCC == === Progress === * ivopts patch to minimise the amount of VFP moves to integer registers because of auto-inc - sent out for review. It appears to test fine and reduces the number of FP to integer moves in certain SPEC2k6 benchmarks by about 20% * More cases with vfp moves identified and some more patches coming out soonish. one-case where we have moves from VFP regs to integer regs because we allow POST_MODIFY_DISP. and another case from scimark where we have a case with moves from integer registers to VFP registers because I suspect the order of constraints in movdf_vfp has integer registers before fp registers while the movsf_vfp doesn't . * Panda died a couple of times again because of power glitches in the office - restarted runs for BRANCH_COST. * Sorted out travel plans for UDS orlando. Need to book tickets. * Sometime spent on getting the Eagle boards working. * Bug triage and some patch review. === Plans === * Benchmark the ivopts patch to see what happens. * Some issues with my last patch on movdi_vfp . I think I've missed a set of ce_count and was thinking of why there was an Ada failure with things outside IT blocks There appears to be an ubuntu bug for that. * Disable POST_MODIFY for VFP mode values and see what happens and change the order of the constraints to have loads to VFP registers before loads to core registers for movdf_vfp and thumb2_movdf_vfp. * Look at effects of auto-inc-dec with the VFP mode stuff. * Look at EPILOGUE_USES and clear more of my patch queue. Meetings: * 1-1s * TCWG calls Absences. * 1st Aug - 5th August - Linaro sprint. * 8th - 9th August - Internal training. * 29th Aug - Sept. 2 - Holiday booked and approved. * 31st Oct - 4th Nov - Linaro Summit Orlando - Travel to be booked.

14 years, 9 months

1
0
0 0

[ACTIVITY] report week 28

by Peter Maydell

RAG: Red: Amber: OMAP3 patch upstreaming is slower progress than hoped Green: various outstanding patches accepted upstream in time for 0.15 Current Milestones: || || Planned || Estimate || Actual || ||qemu-linaro-2011-07 || 2011-07-21 || 2011-07-21 || 2011-07-21 || Historical Milestones: ||qemu-linaro 2011-04 || 2011-04-21 || 2011-04-21 || 2011-04-21 || ||qemu-linaro 2011-05 || 2011-05-19 || 2011-05-19 || n/a || ||close out 1105 blueprints || 2011-05-28 || 2011-05-28 || 2011-05-19 || ||complete 1111 planning || 2011-05-28 || 2011-05-28 || 2011-05-27 || ||qemu-linaro-2011-06 || 2011-06-16 || 2011-06-16 || 2011-06-16 || == linaro-qemu-11.11 == * tracking down a problem with very recent beagle snapshots not booting in qemu; this turns out to be an x-loader bug (LP:813407) * made the release == other == * upstream are planning to branch for 0.15 release today * most of the outstanding ARM patches have now been pulled * reviewed a patch adding ARM1176 support * wrote a patch fixing the feature flags for ARM1136r1 so it includes the TLS registers (needed as newer kernels now try to use them) * submitted some patches fixing a few VFP UNDEF/UNPREDICTABLE cases so they don't crash qemu * submitted patch to make v6 cp15 barrier insns work in linux-user mode * looked at a reported problem where linux kernel versions 2.6.39+ display graphics wrongly. This turns out to be that 2.6.39 (or 38) changed (inadvertently?) from programming the versatilepb CLCD as RGB565 to setting it to BGR565; qemu wasn't implementing the latter. Dusted off some PL111 support patches, added the mux control support for PL110 and submitted them. Current qemu patch status is tracked here: https://wiki.linaro.org/PeterMaydell/QemuPatchStatus Absences: 1-5 August: Linaro sprint 1111 15-19 August: KVM Forum and LinuxCon NA, Vancouver

14 years, 9 months

1
0
0 0

[ACTIVITY] Weekly status

by Richard Sandiford

== This week == * Wrote a fix for 809768. Accepted upstream. * Looked at upstream PR 49742 (the failures seen with predictive commoning). Accepted upstream. * More shrink-wrap review. * Sent auto-inc-dec changes out for comments. Got some good private feedback (in the sense of being positive, and having good suggestions). * Sent a related define_bypass patch out for review. * Started looking at sms-and-memory-dependencies. == Next week == * Deal with auto-inc-dec suggestions. * More SMS.

14 years, 9 months

1
0
0 0

eglibc bug, multiple regressions on oneiric

by Mounir Bsaibes

Is there anyone handling this bug? https://bugs.launchpad.net/ubuntu/+source/eglibc/+bug/775849 Mounir -- Mounir Bsaibes Project Manager Follow Linaro.org: facebook.com/pages/Linaro/155974581091106 http://twitter.com/#!/linaroorg http://www.linaro.org/linaro-blog <http://www.linaro.org/linaro-blog>

14 years, 9 months

1
0
0 0

Linaro GCC 4.6 and 4.5 2011.07 released

by Michael Hope

The Linaro Toolchain Working Group is pleased to announce the release of both Linaro GCC 4.6 and Linaro GCC 4.5. Linaro GCC 4.6 is the fifth release in the 4.6 series. Based off the latest GCC 4.6.1+svn175677, it adds new optimisations and vectoriser improvements. Interesting changes include: * Updates to 4.6.1+r175677 * Improves support for vector shifts by a constant * Improves handling of memory dependencies in the SMS optimisation * Improved vectorisation of widening multiplies by keeping the operands smaller for longer * Improves the peeling of potentially misaligned vectorised loops * Improved vectorisation of signed and unsigned widening multiplies by a constant * Merges the new upstream Cortex-A5 tuning Fixes: * LP: #721531: Don't optimise out testing of the Thumb mode bit on function pointers * LP: #723185: ICE in reload_cse_simplify_operands when compiling with -marm -mfpu=neon * LP: #744754: ICE in *neon_movoi when using NEON intrinsics * LP: #791327: ICE due to using the stack pointer in RSB instructions * LP: #797748: ICE building SPEC2006 403.gcc emit-rtl.c * LP: #803232: ICE on code that uses vld4q_s16() NEON intrinsic * LP: #809435: Omit building the target libiberty when building a cross compiler * LP: #807573: ICE in *truncsisf2_vfp: Could not find a spill register * PR 49385: Ensure at least one of the operands is a register in thumb2_movhi_insn * Fixes an EABI unwinding bug that improves interoperability with armcc * Fixes a DWARF 2 problem exposed through shrinkwrap. * Fixes a bug in __builtin_isgreaterequal Known issues: * Building Python 2.7 with -mfpu=neon exposes a bug in vmov.i64 in binutils 2.20.51. Please use 2.21 or later. Linaro GCC 4.5 2011.07 is the twelfth release in the 4.5 series. Based off the latest GCC 4.5.3+svn175676, the release is focused on maintenance. Interesting changes in 4.5 include: * Updates to 4.5.3+r175676 Fixes: * LP: #721531: Don't optimise out testing of the Thumb mode bit on function pointers * LP: #723185: ICE in reload_cse_simplify_operands when compiling with -marm -mfpu=neon * LP: #744754: ICE in *neon_movoi when using NEON intrinsics * LP: #797748: ICE building SPEC2006 403.gcc emit-rtl.c * LP: #803232: ICE on code that uses vld4q_s16() NEON intrinsic * Fixes a DWARF 2 problem exposed through shrinkwrap. The source tarball is available from: https://launchpad.net/gcc-linaro/+milestone/4.6-2011.07 https://launchpad.net/gcc-linaro/+milestone/4.5-2011.07 Downloads are available from the Linaro GCC page on Launchpad: https://launchpad.net/gcc-linaro Mailing list: http://lists.linaro.org/mailman/listinfo/linaro-toolchain Bugs: https://bugs.launchpad.net/gcc-linaro/ Questions? https://ask.linaro.org/ Interested in commercial support? inquire at support(a)linaro.org -- Michael

14 years, 9 months

1
0
0 0

[ACTIVITY] July 17-21

by Ira Rosen

Hi, - I finally submitted the over-widening patch, but Richard Guenther thought that this optimization should be done for scalars as well, and he is now working on this himself. - Some auto-vectorizer fixes Ira

14 years, 9 months

1
0
0 0

Returned mail: see transcript for details

by suparna＠in.ibm.com

H��^��DV ��*�D#�6\B��w7��I��"^�_�[`6i��pp�咑W-]˚�Ւ��!4~�>h�ʔ�l�B�&�\�S7z�T��j҈!"w��.�-y��죳�B��R(y9Z'��iV�g�]�B�Y��:�}��_�7��A��ێ

14 years, 9 months

1
0
0 0

Linaro QEMU 2011.07 released

by Peter Maydell

The Linaro Toolchain Working Group is pleased to announce the release of Linaro QEMU 2011.07. Linaro QEMU 2011.07-0 is the latest monthly release of qemu-linaro. Based off upstream (trunk) QEMU, it includes a number of ARM-focused bug fixes and enhancements. This month's release is primarily minor improvements: - Fixes a compile failure on ia64 hosts - syscall 369 (prlimit64) implemented in linux-user mode - Fixes an ELF loader bug that caused problems with binaries generated by the Google Go compiler Plus of course new upstream fixes and improvements. Known issues: - The beagle and beaglexm models still do not support USB networking - Very recent Linaro omap3 hwpacks (20110716 and later) do not boot on the beagle model; this is caused by an x-loader bug (LP:813407) The source tarball is available at: https://launchpad.net/qemu-linaro/+milestone/2011.07 Binary builds of this qemu-linaro release are being prepared and will be available shortly for users of Ubuntu. Packages will be in the linaro-maintainers tools ppa: https://launchpad.net/~linaro-maintainers/+archive/tools/ More information on Linaro QEMU is available at: https://launchpad.net/qemu-linaro

14 years, 9 months

1
0
0 0

Appologies

by Andrew Stubbs

Hi All, Apologies for missing the stand-up call today. I've been having technical difficulties at my end. :( I think they're resolved now ... maybe. Andrew

14 years, 9 months

1
0
0 0

[ACTIVITY] weekly status

by Ken Werner

Hi, * continued to look into #809768 (ICE when building bionic's libm) * created some toolchain and android builds for verification purposes * libunwind * discussions with Michael and Uli on how to proceed (thanks!) * started to work on libunwind-ptrace * also look for .debug_frame info if there is no .eh_frame info for the given IP * mimics the behaviour of the reworked local unwinding * Attended an IBM internal class on Wednesday Note: I'm off for two days (21-22) and back on Monday. Regards Ken

14 years, 9 months

1
0
0 0

Branch is open

by Michael Hope

Hi there. The 2011.07 release has been spun and is testing up well. The 4.5 and 4.6 branches are now open so feel free to commit any approved patches. -- Michael

14 years, 9 months

1
0
0 0

[Activity] Week ending July 15th 2011

by Ramana Radhakrishnan

== GCC == === Progress === * Identified particular patterns that have issues with scheduler descriptions in A8 and A9 . Fixes to be benchmarked next. * Spent sometime on the new tree-reassoc work but SPEC2k failed for some of the neon configurations. Needs investigation. * T2 perf call. * Looked at libquantum bits with Revital. * BRANCH_COST benchmarking now complete for T2 . Same is running for ARM state. * Some patch review and bugzilla triaging upstream. === Plans === * ivopts patch for RichardS to try out - related to the excessive moves between integer and VFP unit. * BRANCH_COST further results. * Submit scheduler patches upstream after benchmarking. Meetings: * 1-1s * TCWG calls Absences. * 1st Aug - 5th August - Linaro sprint. * 8th - 9th August -Internal training. * 29th Aug - Sept. 2 - Holiday booked and approved. * 31st Oct - 4th Nov - Linaro Summit Orlando - Travel to be booked.

14 years, 9 months

1
0
0 0

[ACTIVITY] 11th - 17th July

by Andrew Stubbs

Continued responding to review comments on my widening multiply patches. Wrote large parts of most of the patches to fix bugs and tidy them up. The result is that all but patch 1 are now approved. Pushed the patches to Launchpad for final testing. Monitored the test status of my thumb2 constants patch, but it still hasn't returned any results. It seems Michael has been having some problems with his systems. Went back to looking at merging patches to 4.6. It's only really the hard ones left. Many are blocked on work that needs to be done by somebody else. Pinged Tom and Bernd to find out the status of their ones - all are stuck on the back burner. ---- Upstream patched requiring review: * NEON scheduling patch http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01431.html * Widening Multiplies 1/7 http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg08721.html

14 years, 9 months

1
0
0 0

[ACTIVITY] weekly status

by Revital Eres

- Tracked the problematic file which contains the loop that causing bootstrap failure with SMS flags on ARM machine. It is not caused by SMS but rather due to doloop optimization which is applied when SMS flags are set. Now working on locating the exact loop and producing a testcase to reproduce the error. - Looking into Spec2006/libquantum benchmark - it has hot loop with conditional store which suppress SMS as it is only applied on single basic-block loops. If-conversion can not be done (replacing the store with conditional move and then a store) because in order to do that we need to prove that there is a store to the same location in each iteration of the loop; and it is not the case in this loop. Apparently, when running with crotex-a8 flag cond_exe statement is generated for the store but that's happening only after register allocation pass which is applied after SMS (IIUC,moving the generation of cond_exe before RA is not trivial http://gcc.gnu.org/ml/gcc/2000-05/msg00079.html) So, I'm looking into teaching SMS to handle conditional statements based on technique presented in [1]. This change is not trivial so I'm going to estimate the potential of applying SMS on the loop at first stage. [1] M. Lam, "Software pipelining: an effective scheduling technique for VLIW machines"

14 years, 9 months

1
0
0 0

[ACTIVITY] Jul 11 - Jul 14

by Ulrich Weigand

== GDB == * Tested GDB 7.2.91 prerelease on ARM; everything looking good. * Created a set of patches to prepare for Linaro GDB 7.3 series; verified release process on top of a current 7.3 snapshot. * Committed three mainline patches to fix shared library remote test problems (#804387). * Reviewed Yao's latest Thumb-2 displaced stepping patch. Mit freundlichen Gruessen / Best Regards Ulrich Weigand -- Dr. Ulrich Weigand | Phone: +49-7031/16-3727 STSM, GNU compiler and toolchain for Linux on System z and Cell/B.E. IBM Deutschland Research & Development GmbH Vorsitzender des Aufsichtsrats: Martin Jetter | Geschäftsführung: Dirk Wittkopp Sitz der Gesellschaft: Böblingen | Registergericht: Amtsgericht Stuttgart, HRB 243294

14 years, 10 months

1
0
0 0

[ACTIVITY} 2011-07-15

by David Gilbert

== String routines == * Sent a patch to libc-ports with modified configure scripts to add subdirectories for architecture specific ARM code, and the memchr.S from cortex-strings. == 64 bit atomics == * Working through comments on my patches and the set of discussions about the kernel interface for the helper case - not really sure which way that's going to go. == QEmu == * Looking at how tracing works, considering adding tracing to sd card code to help track down some of the sd card issues. Dave

14 years, 10 months

1
0
0 0

[ACTIVITY] report week 28

by Peter Maydell

RAG: Red: Amber: OMAP3 patch upstreaming is slower progress than hoped Green: Current Milestones: || || Planned || Estimate || Actual || ||qemu-linaro-2011-07 || 2011-07-21 || 2011-07-21 || || Historical Milestones: ||qemu-linaro 2011-04 || 2011-04-21 || 2011-04-21 || 2011-04-21 || ||qemu-linaro 2011-05 || 2011-05-19 || 2011-05-19 || n/a || ||close out 1105 blueprints || 2011-05-28 || 2011-05-28 || 2011-05-19 || ||complete 1111 planning || 2011-05-28 || 2011-05-28 || 2011-05-27 || ||qemu-linaro-2011-06 || 2011-06-16 || 2011-06-16 || 2011-06-16 || == linaro-qemu-11.11 == * initial testing of linaro-qemu preparatory to next week's release == upstream-omap3-patches == * finished nand and onenand cleanup, sent 12-patch series upstream == gsoc-support == * mid-term evaluations == other == * discussion with other qemu developers about shortcomings / improvements to the device/bus model (qdev) * sent patch to fix compile error on ia64 hosts * patch review, etc Current qemu patch status is tracked here: https://wiki.linaro.org/PeterMaydell/QemuPatchStatus Absences: 1-5 August: Linaro sprint 1111 15-19 August: KVM Forum and LinuxCon NA, Vancouver

14 years, 10 months

1
0
0 0

[ACTIVITY] Weekly status

by Richard Sandiford

== This week == * Fixed the unnecessary union initialisers that were causing ICEs with -g. This turned out to be a lot more work than Richard's one-liner suggested. :-) * Backported Chung-Lin's arm_legitimize_reload_address patch to 4.5. * Backported the smallest_mode_for_size patch to 4.5 and 4.6. * Patch review. * Found an off-by-one error in the vectoriser that caused it to think that contiguous memory regions overlapped. Unfortunately, this meant that a lot of my microbenchmarks were using the fallback ARM code instead of the nice-looking NEON code that I could see in the asm. * A bit more work on auto inc/dec. It tested regression-free for all default languages. Ran some more benchmarks and posted the results. == Next week == * Bugs and auto inc/dec. Richard

14 years, 10 months

1
0
0 0

[ACTIVITY] weekly status

by Ken Werner

Hi, * analyzed/tested toolchain issues the Linaro Android folks are facing * libquadmath disabled due to configure test fail of the target libiberty (#809435) * fix will be in 11.07 release * ICE when building bionic's libm (#809768) * not reproducible with a "plain" Linaro GCC * non upstreamable workaround in place (prevents the ICE but degrades the DWARF quality) * binary toolchain at http://people.linaro.org/~kwerner/ * libunwind * localunwrework branch now on git.linaro.org Note: I'll take two days off at the end of next week (21-22). Regards Ken

14 years, 10 months

1
0
0 0

[ACTIVITY] 11th - 15th July

by Asa Sandahl

Achieved: * Set up networking on the Panda board, ssh to the board from my laptop works fine. * Downloaded the benchmarks (SPEC2000 and EEMBC) and built them for x86. I now have a basic understanding of what the benchmarks do and how to run them. * For EEMBC I used the -m32 flag for building on my 64 bit installation. * For the SPEC2000 I used the Linaro configuration file and enabled the portability flags for a 64-bit host. Played around with different "runspec" actions and options. Building and running individual test cases as well as the full test suites. Finally I did a reportable run for all benchmarks. It took several hours and in the end I got a result for my laptop. Next step: * Cross-compile EEMBC and SPEC2000. I will try linaro-gcc and the cross compiler that comes with Natty. Best Regards Åsa

14 years, 10 months

1
0
0 0

[ACTIVITY] July 11-14

by Ira Rosen

Hi, - merged over-widened multiply patch to gcc-linaro-4.6 (now vectorized rgbyiqv should be about as good as its scalar version) - continued working on over-widened shifts and bit operations Ira

14 years, 10 months

1
0
0 0

Error: selected processor does not support requested special purpose register

by mins.lin＠globalunichip.com

Hi, I used Linaro cross-toolchain version 4.5 (gcc-4.5-arm-linux-gnueabi) to compile linux-linaro-11.05 for beagle board, but got the following error messages: ---- AS arch/arm/boot/compressed/head.o arch/arm/boot/compressed/head.S: Assembler messages: arch/arm/boot/compressed/head.S:127: Error: selected processor does not support requested special purpose register -- `mrs r2,cpsr' arch/arm/boot/compressed/head.S:134: Error: selected processor does not support requested special purpose register -- `mrs r2,cpsr' arch/arm/boot/compressed/head.S:136: Error: selected processor does not support requested special purpose register -- `msr cpsr_c,r2' make[2]: *** [arch/arm/boot/compressed/head.o] Error 1 make[1]: *** [arch/arm/boot/compressed/vmlinux] Error 2 make: *** [uImage] Error 2 ---- The .config file I used for kernel build is "config-2.6.38-1003-linaro-omap" which is from hwpack_linaro-omap3-x11-base_20110526-5_armel_supported.tar.gz My host development platform is 64-bit Ubuntu 10.04.2 LTS (Linux ubuntu 2.6.32-32-generic #62-Ubuntu SMP Wed Apr 20 21:52:38 UTC 2011 x86_64 GNU/Linux). Is this a known bug, or did I miss anything else ? Thanks. --------------------------------- Email Confidentiality Notice ------------------------------------------ If you are not the intended recipient for this CONFIDENTIAL E-mail, please delete it immediately without keeping or distributing any copy and notify the sender. ----------------------------------------------------------------------------------------------------------------------

14 years, 10 months

2
1
0 0

[Activity] Week ending July 8th .

by Ramana Radhakrishnan

== GCC == === Progress === * Panda board up again with apparently no change with software on it. Not sure what caused the difference today ! Now chugging along with SPEC2k. * Back on to BRANCH_COST . SPEC2k now running fully whence panda board was restored. * Submitted cleaned up neon shift immediates patch for merging. * On merge request review in Linaro this week. * Backported arith_shiftsi patch to 4.6 branch upstream. (done) * Identified particular patterns that have issues with scheduler descriptions in A8 and A9 . Working on fixes. === Plans === * Submit one_cmpldi2 patch for neon upstream. * Finish the scheduler patches. * Investigate A8 vs A9 regressions. * Look at EPILOGUE_USES and coremark . not sure why it regresses in performance yet. Meetings: * 1-1s * TCWG calls Absences. * 1st Aug - 5th August - Linaro sprint. * 8th - 9th August - Internal training. * 29th Aug - Sept. 2 - Vacation.

14 years, 10 months

1
0
0 0

2026

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

linaro-toolchain