- linaro-toolchain - lists.linaro.org

by Christian Robottom Reis

I just noticed today an online code cycle analyzer that targets the Cortex-A8: http://pulsar.webshaker.net/ccc/index.php?lng=us Does anyone know who the author of that is, and whether he'd be interested in doing an A9 update? -- Christian Robottom Reis | [+55 16] 3376 0125 | http://launchpad.net/~kiko Canonical Ltd. | [+55 16] 9112 6430 | http://async.com.br/~kiko

14 years, 1 month

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[ACTIVITY] 16th - 20th May

by Andrew Stubbs

Posted a new patch for 16 -> 64 bit multiply and accumulate: http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg05794.html Pushed the same patch to a Launchpad branch for testing. Pinged my addw/subw patch as a review didn't seem forthcoming. Worked on a canonical form for HImode to DImode multiple-and-accumulate. The problem isn't too hard to fix, but it's hard to do it in a nice way. Attended Nathan S's reorg call. Followed up by talking to Nathan F about what he's been working on with Wind River. Read up on the Wiki. Looked at why the ARM smlal{tb,bt,tt} instructions are not generated. I've added the proper patterns, but combine doesn't match them, and I've run out of time this week to check why. ---- Upstream patched requiring review: * NEON scheduling patch http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01431.html * ARM Thumb2 addw/subw support. http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg03783.html * Multiply and accumulate: http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg05794.html

14 years, 1 month

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[ACTIVITY] May.16 -- May.22

by Chung-Lin Tang

== Last week == * Took Monday off, flew back to Taiwan on Tues., got home Wed. night. * LP:689887, ICE in get_arm_condition_code(). Finally have some new progress on this. Found my code was rejecting DImode comparisons, causing uses of __aeabi_lcmp, etc. in expanded RTL. While this still does not fully explain a bootstrap fail, it may be related, and it's good I found this here rather then scratch heads on performance regressions later... :) * LP:771903: invalid ubfx asm produced by GCC. Mostly got down to the bottom of this. This bug is rather well hidden, first avoided due to some inlining heuristic changes after FSF 4.5 was branched (hence 4.6 and trunk doesn't show on the testcase), then hidden again later by -ftree-bit-ccp. Was able to reproduce on mainline trunk after some changes to testcase and options. Will send patch later. * Talked with Ramana on IRC and mail about the '+' constraint modifiers in the VFP fmul/fdiv patterns. Mostly concluded that these are typos, and should be fixed. == This week == * Continue with issues.

14 years, 1 month

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Engineering blueprints for 11.11

by Michael Hope

Hi there. The next two weeks is where we take the technical topics from the TSC and the discussions had during the summit and turn them into the concrete engineering blueprints for this cycle. I've created a page at: https://wiki.linaro.org/MichaelHope/Sandbox/1111Blueprints listing all of the TRs. Could you please have a look through these, find any with your name on them, and fill in the wiki page. I've put more notes on the page itself. Some of the topics may warrant specifications. Let me know if you have questions on what the topics actually mean. -- Michael

14 years, 1 month

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[ACTIVITY] 2011-05-20

by David Gilbert

* Profiling SPEC 2k6 still; about 3/4 of the latrace files are generated but it's taking some hand holding with some of them (e.g. finding one that makes millions of calls to a library function that we're not interested in but generates a huge log, and hence needs it excluding). * Working through the ones that I have with analysis scripts and writing the interesting things up. * Submitted ARM test suite fix for latrace (unsigned characterism) * Verified Richard's binutils fix in natty-proposed fixed the vtk FTBFS * Blueprint for 64bit sync primitives. Dave

14 years, 1 month

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[ACTIVITY] weekly status

by Ken Werner

Hi, * started to measure the overhead of -funwind-tables * libunwind text size increase < 5% * firefox4 is still building... :) * found a small glitch when cross compiling the binutils deb package * made a small patch, talked with doko, fix upstream * installed android on the pandaboard https://wiki.linaro.org/KenWerner/Sandbox/AndroidOnPanda * setup an android development environment on my thinkpad Regards Ken

14 years, 1 month

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[ACTIVITY] report week 20

by Peter Maydell

RAG: Red: Amber: Green: 1105 work item status 100% complete Current Milestones: | Planned | Estimate | Actual | qemu-linaro 2011-05 | 2011-05-19 | 2011-05-19 | n/a | close out 1105 blueprints | 2011-05-28 | 2011-05-28 | 201--05-19 | complete 1111 planning | 2011-05-28 | 2011-05-28 | | Historical Milestones: finish qemu-cont-integration | 2011-01-25 | 2011-01-25 | handed off | first qemu-linaro release | 2011-02-08 | 2011-02-08 | 2011-02-08 | qemu-linaro 2011-03 | 2011-03-08 | 2011-03-08 | 2011-03-08 | qemu-linaro 2011-04 | 2011-04-21 | 2011-04-21 | 2011-04-21 | == merge-correctness-fixes == * last few work items for this blueprint either completed or postponed [For the record, postponed work: setting Cortex A8r2 device ID etc regs -- moved to omap3 upstreaming trustzone -- may get its own blueprint this cycle VCVT fp exception flags -- postponed as rather tricky and an obscure corner case that is unlikely to be noticed by users] == other == * tracked down bug with QEMU loading of Google Go produced ELF files, submitted patch * talked to our local trustzone expert, very useful * reworked and resent FPSCR exception flags patches based on review comments * reviewed a patch for setting IFSR right for BKPT * more planning effort * sent patch to suppress SD card model warnings generated when Linux probes to see if it's an SDIO card * redid the "check for unused -nic options" patch as it turned out to cause regressions with NICs created via -device. Meetings: toolchain, standup, 1-2-1 Current qemu patch status is tracked here: https://wiki.linaro.org/PeterMaydell/QemuPatchStatus Absences: (maybe) 15-16 August: QEMU/KVM strand at LinuxCon NA, Vancouver [LinuxCon proper follows on 17-19th]

14 years, 1 month

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[ACTIVITY] Weekly status

by Richard Sandiford

== This week == * Spent almost all the week on GCC's auto inc/dec pass. I first continued with the incremental "clean ups" and recoding that I'd started during free time at Budapest, with the idea of bolting the new optimisations on top of that. However, in the end, I decided it would be better to rewrite the pass entirely, using a different approach. I've now got an early prototype of that rewrite, and it seems to be working as expected on the test cases I've tried so far. I'm running a regression test over the weekend, although TBH, I expect it to fail at this stage. * Tested the fix for vzip, vunz and vtrn. Went well, so I'll submit next week. * Blueprints. == Next week == * More auto inc/dec: * Round off some known rough edges in the prototype. * Fix bugs. * Run benchmarks. * Run code comparison tests (diffing assembly code), both on ARM and on other targets of interest. Richard

14 years, 1 month

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Linaro GDB 7.2 2011.05 released

by Michael Hope

The Linaro Toolchain Working Group is pleased to announce the release of Linaro GDB 7.2. Linaro GDB 7.2 2011.05-0 is the sixth release in the 7.2 series. Based off the latest GDB 7.2, it includes a number of ARM-focused bug fixes. This release fixes: * LP: #615972 Neon registers missing in core files * LP: #615978 Failure to software single-step into signal handler * LP: #615996 gdb.cp/templates.exp failures The source tarball is available at: https://launchpad.net/gdb-linaro/+milestone/7.2-2011.05-0 More information on Linaro GDB is available at: https://launchpad.net/gdb-linaro -- Michael

14 years, 1 month

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What is qemu-linaro's current progress ?

by karim.allah.ahmed＠gmail.com

Can somebody please explain how development happens regarding qemu-linaro ? I've taken a look here [0] and If I'm not mistaken, there's no code in the repo. I can see a lot of blueprints, but I don't understand how work is being done regarding those blueprints or when will it be done! Oh, and what exactly is the 'qemu-linaro' tarball in the repo ? I'm not sure how newbie this question is, but please bear with me. :D Thanks in advance. [0] https://launchpad.net/qemu-linaro -- Karim Allah Ahmed. LinkedIn <http://eg.linkedin.com/pub/karim-allah-ahmed/13/829/550/>

14 years, 1 month

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[ACTIVITY] May 15-19

by Revital Eres

Hello, * Sent 5 SMS related patches for review upstream. * Backported two SMS patches from mainline to gcc-linaro and gcc-linaro/4.6 (fixes for unfreed memory) Thanks, Revital

14 years, 1 month

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[ACTIVITY] May 15-19

by Ira Rosen

Hi, * committed a patch that supports reductions in SLP (upstream) * continued analyzing benchmarks: ffmpeg, EEMBC telecom, office, networking * started to look into implementation of reverse accesses for Neon * blueprints Ira

14 years, 1 month

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Linaro GCC 4.5 and 4.6 2011-05 released

by Michael Hope

The Linaro Toolchain Working Group is pleased to announce the release of both Linaro GCC 4.5 and Linaro GCC 4.6. Linaro GCC 4.5 2011.05 is the tenth release in the 4.5 series. Based off the latest GCC 4.5.3+svn173417, it adds new optimisations, much improved support for strided load/stores, and fixes for many of the issues found in the last month. Interesting changes in 4.5 include: * Updates to 4.5.3+r173417 * Performance improvements in NEON strided loads and stores * Performance improvements targeted at EEMBC CoreMark * Precompiled header support on recent Linux kernels Fixes: * LP: #660156: Heap randomisation causes PCH testsuite failures * LP: #784375: vset_lane_u8 intrinsic generates wrong lane number * LP: #759409: Profiled bootstrap fails in FSF GCC 4.5 * LP: #723086: Test regressions in the Fortran test suite The strided load/store improvements allow both NEON intrinsics and the vectoriser to efficiently access values that occur at every n'th address, such as all of the red values in a RGB image or all of the left channel samples in a interleaved audio array. Previous versions of GCC would unpack the values onto the stack instead of using the registers directly. The CoreMark improvements improve the code generation for the hot functions in benchmark. This release is now on par with Linaro GCC 4.4 and significantly ahead of other FSF or Linaro 4.5 based compilers. This fixes the long-standing problems of ARMv5 being faster than ARMv7 and 4.4 based compilers being faster than 4.5 based ones. Linaro GCC 4.6 is the third release in the 4.6 series. Based off the latest GCC 4.6.0+svn173480, it adds new optimisations, vectoriser improvements, and continues with the merge of many ARM-focused changes. Interesting changes include: * Updates to 4.6.0+r173417 * Brings forward more of the performance improvements from Linaro GCC 4.5 * Adds support for swing-modulo scheduling * Fixes precompiled header support on recent Linux kernels * Changes the default NEON vector size to quads * Adds auto-detection of the best vector size * Adds vectorisation improvements due to better if-conversion Fixes: * LP: #714921: Uses an unreasonable amount of memory to compile QEMU on armel * LP: #723086: Test regressions in the Fortran test suite The source tarball is available from: https://launchpad.net/gcc-linaro/+milestone/4.5-2011.05-0 https://launchpad.net/gcc-linaro/+milestone/4.6-2011.05-0 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, 1 month

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Bug in linaros implementation of vset_lane intrinsics

by Lee Moore

Hi All, This is based upon gcc version 4.5.3 (20110221 pre-release) Any help appreciated This shows a bug in the Linaro gcc compiler with the Arm NEON vset_lane intrinsic Note in the objdump that the vmov.8 instruction that places the value in the vector for the non-q version uses 1 where it should use 2 and 3: 18: ee410bb0 vmov.8 d17[1], r0 1c: ee420bb0 vmov.8 d18[1], r0 20: ee400b90 vmov.8 d16[0], r0 3c: ee440bb0 vmov.8 d20[1], r0 For the q version the vmov.8 instructions are correct: 40: ee420bf0 vmov.8 d18[3], r0 54: ee420bd0 vmov.8 d18[2], r0 64: ee400b90 vmov.8 d16[0], r0 70: ee420bb0 vmov.8 d18[1], r0 /* Source code */ #include <arm_neon.h> static uint8x8_t vec[5] static uint8x16_t qvec[5]; void set(uint8_t value) { vec[1] = vset_lane_u8(value, vec[0], 3); vec[2] = vset_lane_u8(value, vec[0], 2); vec[3] = vset_lane_u8(value, vec[0], 1); vec[4] = vset_lane_u8(value, vec[0], 0); qvec[1] = vsetq_lane_u8(value, qvec[0], 3); qvec[2] = vsetq_lane_u8(value, qvec[0], 2); qvec[3] = vsetq_lane_u8(value, qvec[0], 1); qvec[4] = vsetq_lane_u8(value, qvec[0], 0); } Thx Lee

14 years, 1 month

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Branch is open

by Michael Hope

Hi there. The 2011.05 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, 1 month

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[Activity] Progress till 2011-05-13

by Ramana Radhakrishnan

Progress: * Attended LDS from 9th -14th May. Plans: * Look at Thumb2 performance blueprint and break it down. * Investigate more headroom for SPEC2k starting this week. * Thumb2 performance call this week. Meetings: * 1-1s * T2 performance.

14 years, 1 month

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[ACTIVITY] 9th - 13th May

by Revital Eres

Hello, - Attended Linaro@UDS. - SMS patches to support ARM do-loop pattern got approved in mainline and merged into gcc-linaro 4.6 and 4.5. - Sent merge request for two patches in trunk. (SMS_fixes_for_unfreed_memory) - Implemented an optimization for the stage-count and now testing it. Thanks, Revital

14 years, 1 month

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[ACTIVITY] May.09 -- May.15

by Chung-Lin Tang

== Last week == * At Linaro@UDS; I am still typing this in Budapest. Sparingly did some work between sessions. * PR42017, ARM LR register not being used. Discussed the patch with Richard Sandiford at LDS. Re-tested a bit and about to resend a revised patch according to his suggestion. * LP:748138, redirect_jump() ICE. Committed patch to CS stable and trunk. Submitted merge request to Linaro 4.5 branch. * LP:689887. Got some suggestions from Revital on how to debug the bootstrap failure caused by my patch, will look into applying it. == This week == * Taking Monday off, I'll be flying back to Taiwan on Tuesday. * Continue with issues after getting home.

14 years, 1 month

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[ACTIVITY] 9th - 13th May

by Andrew Stubbs

Spent the whole week attending Linaro@UDS. Any other activity this week is squeezed into the space between (interesting) sessions. Finished making the suggested changes to my Thumb2 constants patch, and posted it back upstream. This is pre-approved, but can't be committed until after the addw/subw patch. http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg05195.html Merged all my outstanding approved merge requests to the release branches in time for next week's release. ---- Upstream patched requiring review: * NEON scheduling patch http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01431.html * ARM Thumb2 addw/subw support. http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg03783.html

14 years, 1 month

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[ACTIVITY] report week 19

by Peter Maydell

RAG: Red: Amber: Green: 1105 work item status 99% complete with 2 weeks to go Current Milestones: | Planned | Estimate | Actual | qemu-linaro 2011-05 | 2011-05-19 | 2011-05-19 | n/a | close out 1105 blueprints | 2011-05-28 | 2011-05-28 | | complete 1111 planning | 2011-05-28 | 2011-05-28 | | Historical Milestones: finish qemu-cont-integration | 2011-01-25 | 2011-01-25 | handed off | first qemu-linaro release | 2011-02-08 | 2011-02-08 | 2011-02-08 | qemu-linaro 2011-03 | 2011-03-08 | 2011-03-08 | 2011-03-08 | qemu-linaro 2011-04 | 2011-04-21 | 2011-04-21 | 2011-04-21 | == merge-correctness-fixes == * some of my pending patches have been applied; a number of others are still under discussion or need further work/testing == other == * We won't be making a qemu-linaro 2011-05 release, since there are no changes since the 2011-04 release (due to a combination of the Easter holiday and UDS week). * Attended UDS * almost all 1105 work items either complete or confirmed postponed to next cycle * Good progress on fleshing out blueprints for next cycle: https://wiki.linaro.org/PeterMaydell/Qemu1111 Current qemu patch status is tracked here: https://wiki.linaro.org/PeterMaydell/QemuPatchStatus Absences: (maybe) 15-16 August: QEMU/KVM strand at LinuxCon NA, Vancouver [LinuxCon proper follows on 17-19th]

14 years, 1 month

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Idea for auto-increment performance improvement

by Richard Sandiford

Last week, Ramana pointed me at an upstream bug report about the inefficient code that GCC generates for vzip, vuzp and vtrn: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48941 It was filed not longer after the Neon seminar at the summit; I'm not sure whether that was a coincidence or not. I attached a patch to the bug last week and will test it this week. However, a cut-down version shows up another problem that isn't related specifically to intrinsics. Given: #include <arm_neon.h> void foo (float32x4x2_t *__restrict dst, float32x4_t *__restrict src, int n) { while (n--) { dst[0] = vzipq_f32 (src[0], src[1]); dst[1] = vzipq_f32 (src[2], src[3]); dst += 2; src += 4; } } GCC produces: cmp r2, #0 bxeq lr .L3: vldmia r1, {d16-d17} vldr d18, [r1, #16] vldr d19, [r1, #24] vldr d20, [r1, #32] vldr d21, [r1, #40] vldr d22, [r1, #48] vldr d23, [r1, #56] add r3, r0, #32 vzip.32 q8, q9 vzip.32 q10, q11 subs r2, r2, #1 vstmia r0, {d16-d19} add r1, r1, #64 vstmia r3, {d20-d23} add r0, r0, #64 bne .L3 bx lr We're missing many auto-increment opportunities here. I think this is due to the limitations of GCC's auto-inc-dec pass rather than to a problem in the ARM port itself. I think there are two main areas for improvement: - The pass only tries to use auto-incs in cases where there is a separate addition and memory access. It doesn't try to handle cases where there are two consecutive memory accesses of the form *base and *(base + size), even if the address costs make it clear that post-increments would be a win. - The pass uses a backward scan rather than a forward scan, which makes it harder to spot chains of more than two accesses. FWIW, I've got fairly specific ideas about how to do this. Unfortunately, the pass is in need of some TLC before it's easy to make changes. So in terms of work items, how about: 1. Clean up the auto-inc pass so that it's easier to modify 2. Investigate improvements to the pass 3. Submit the changes upstream 4. Backport the changes to the Linaro branches I wrote some patches for (1) last week. I'd estimate it's about 2 weeks' work for (1) and (2). (3) and (4) would hopefully be background tasks. The aim would be for something like: .L3: vldmia r1!, {d16-d17} vldmia r1!, {d18-d19} vldmia r1!, {d20-d21} vldmia r1!, {d22-d23} vzip.32 q8, q9 vzip.32 q10, q11 subs r2, r2, #1 vstmia r0!, {d16-d19} vstmia r0!, {d20-d23} bne .L3 bx lr This should help with auto-vectorised code, as well as normal core code. (Combining the vldmias and vstmias is a different topic. The fact that this particular example could be implemented using one load and one store is to some extent coincidental.) Richard

14 years, 1 month

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[ACTIVITY] 2011-05-13

by David Gilbert

== String routines == * Gave up on perf on silverbell and redid it on ursa2; now have a full set of perf figures and have updated the workload report to show the spec binaries that use significant time in libc and the routines they spend it in; a handful of tests spend very significant amounts of time in libm. * Have ltrace results from about 75% of spec - some of the others are fighting a bit * Optimised the non-neon memcpy; it's now quite respectable except in one or two cases (2 byte misaligned, and for some odd reason source offset by 8 bytes, destination by 12 is way down on any other combination) (Current result graphs here https://wiki.linaro.org/Internal/People/DaveGilbert?action=AttachFile&do=ge… ) Dave

14 years, 1 month

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[ACTIVITY] May 8-12

by Ira Rosen

Hi, * continued looking into ffmpeg/libavcodec: - dcadsp.c - the inner loop contains reverse accesses which are not supported on Neon. I think we can handle them using vrev and vswp. - a lot of loops have unknown memory stride. I am exploring a possibility of a combination of scalar loads and vmov into a vector register, but it is probably too expensive. * looking into telecom/conven Ira

14 years, 1 month

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[ACTIVITY] May.02 -- May.08

by Chung-Lin Tang

== Last week == * Launchpad #748138: "ICE in redirect_jump, at jump.c:1443". Related to shrink-wrap, discussed a bit with Bernd off-list. Sent fix today (Mon.) to gnu-internal; will need to merge to Linaro. * CoreMark combine canonicalize compares patch set: bootstrapped and tested with clean results on powerpc, added comments and updated upstream submission. Machine independent parts okayed by Jeff Law, now committed upstream. ARM parts still pending review. * Compiled back-list of upstream patches, and sent to patches(a)linaro.org * Traveled to Budapest, Hungary for Linaro Developer Summit on Saturday. == This week == * Linaro Developer Summit at Budapest all week.

14 years, 1 month

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[ACTIVITY] May 2 - May 6

by Ulrich Weigand

== GDB == * Committed support for NEON registers in core dumps (bug #615972) to Linaro GDB (not yet in mainline). * Investigated root cause of bug #615996 (gdb.cp/templates.exp) and started exploring ways to fix it. == GCC == * Committed fix for bug #759409 (Profiled bootstrap fails in GCC 4.5) to FSF GCC 4.5 branch and Linaro GCC 4.5. 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, 1 month

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[ACTIVITY] 3th - 6th May

by Andrew Stubbs

Worked on the ARM 16 -> 64-bit multiply-and-accumulate problem. Bernd kindly provided a prototype patch to help. I've tried to understand what needs to be done, but I didn't have enough time to get to the bottom of it. So far, I think I know why the existing code doesn't work, and I think I have a way forward. It does appear that the real problem ought to be solved in the tree optimizers, though. Committed the FSF GCC 4.5.3 merge to the Linaro 4.5 branch. Testing did not show any trouble. Matthias requested an additional 4.5 merge to pick up a new bug fix, so I've done the merge, and submitted the merge request for testing. Committed Maxim's compound conditionals optimization patch - a merge from Linaro GCC 4.5. There was some confusion caused by the lp:gcc-linaro/4.6 branch history accidentally getting re-written. After some discussion on #bzr I managed to figure out what happened, posted a warning to linaro-toolchain mailing list, and changed the branch configuration to prevent it happening again. Committed Mark Shinwell's BRANCH_COST patch to Linaro GCC 4.6 - another merge from GCC 4.5. Merged from FSF GCC 4.6 to Linaro 4.6 and submitted the patch for testing. Richard Earnshaw approved my recent Thumb2 constants patch, but only if I modify it slightly. I've begun work on the changes, but I still need to test them. I won't be able to commit them until the ADDW/SUBW patch has been approved. Ramana has reviewed my EABI half-precision function names patch, and discovered that the return types are wrong. I have no idea how this happened - the changes are deliberate so they must have been based on something, but I no longer have the same documents I had when I did the work, and it clearly doesn't match my current ones. In any case, the changes make no practical difference as function return values are always as wide a register anyway. * Other Public holiday on Monday. * Next week I will be attending UDS in Budapest from 8th - 14th May. I shall continue to read my email, but will not be attending any calls. ---- Upstream patched requiring review: * NEON scheduling patch http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01431.html * ARM Thumb2 addw/subw support. http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg03783.html

14 years, 1 month

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[ACTIVITY] 2011-05-06

by David Gilbert

== Bug fighting == * Tracked bug 774175 (apt segfault on armel on oneiric) down to the cortex-a8 branch erratum bug that we found as part of the bug jam a few weeks ago (affecting the more obscure vtk package) - Richard's existing binutils fix should fix this. == String routines == * Struggled to get 'perf' to get sane results from profiling spec; some of the samples are obviously being associated with the wrong process somewhere along the process (e.g. it's showing significant samples in the sh process but in a library that's used by the actual benchmark. * latrace on spec still running on ursa2 * Wrote a non-neon memcpy; as expected it's aligned performance is very similar to libc/kernel - it's a bit faster in some places but slower in some odd places (e.g. n*32+1 bytes is a lot slower for some reason). It's also really bad on mis-aligned cases, I tried to take advantage of the v7's ability to do misaligned loads - but they really are quite slow. Dave

14 years, 1 month

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Summit!

by Michael Hope

Hi everyone. Welcome to Budapest. The schedule is at: http://summit.ubuntu.com/uds-o/track/linaro-toolchain/ and should be pretty solid now. The NEON and strings ones may change to a room with a conference line, but we'll see. Thursday and Friday are mostly clear. Be at the hotel by 8:45. The plenary is at 9 am and is followed by a Linaro all-hands at 10. I've tried to reserve the room 'Ady' for general work and meetings but do try to make good use of the summit by having a look at the other sessions listed at: http://summit.ubuntu.com/uds-o/ and the full list of toolchain topics at: https://blueprints.launchpad.net/linaro-toolchain?searchtext=toolchain-o and subscribe to the interesting ones. Note that the schedule will keep changing through the week so keep a good eye on the board. Some that I found interesting are: https://blueprints.launchpad.net/linaro-android/+spec/linaro-android-o-cont… https://blueprints.launchpad.net/linaro-android/+spec/linaro-android-o-hard… https://blueprints.launchpad.net/ubuntu/+spec/other-o-arm-boot-speed https://blueprints.launchpad.net/ubuntu/+spec/other-o-arm-firefox-startup https://blueprints.launchpad.net/ubuntu/+spec/other-o-arm-port-lightspark https://blueprints.launchpad.net/ubuntu/+spec/linaro-platforms-o-ubuntu-tra… with the full list at: https://blueprints.launchpad.net/~michaelh1/+specs?role=subscriber See you all tomorrow! -- Michael

14 years, 1 month

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[ACTIVITY] Weekly status

by Richard Sandiford

== This week == * Committed interleaved load/store vectorisation changes upstream. * Merged the vldN and vstN intrinsic improvements into Linaro 4.5 and 4.6. (Thanks for the quick reviews here.) * Backported the interleaved load/store vectorisation changes to Linaro 4.5 and 4.6. This took a while because the patch series touches turbulent code. Submitted merge requests. * Merged Sergey Grechanik's NEON reload improvement into Linaro 4.5 and 4.6. * Got ready for summit. Richard

14 years, 1 month

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[ACTIVITY] weekly status

by Ken Werner

Hi, * finished libunwind support of detection and handling of signal frames on ARM Linux. RT and non-RT signal frames are handled for both >=2.6.18 and <2.6.18 kernels. The *test-resume-sig testcases are passing now. * briefly looked into what needs to be done in order to add 64bit __sync_* ops * prepared for LDS Regards Ken

14 years, 1 month

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[ACTIVITY] report week 18

by Peter Maydell

RAG: Red: Amber: Green: GSoC QEMU student project approved Current Milestones: | Planned | Estimate | Actual | qemu-linaro 2011-05 | 2011-05-19 | 2011-05-19 | | Historical Milestones: finish qemu-cont-integration | 2011-01-25 | 2011-01-25 | handed off | first qemu-linaro release | 2011-02-08 | 2011-02-08 | 2011-02-08 | qemu-linaro 2011-03 | 2011-03-08 | 2011-03-08 | 2011-03-08 | qemu-linaro 2011-04 | 2011-04-21 | 2011-04-21 | 2011-04-21 | (short week, following holiday) == merge-correctness-fixes == * some minor patches committed: SPARC build issues, Neon UNDEFs, restore base reg properly for Thumb LDMs that abort midway * v2 of configure patch to print list of valid targets * some work on fixing QEMU FPSCR status flags (last remaining item in this blueprint); submitted a patchset fixing everything except the various VCVT instructions (which have trickier softfloat bugs) * submitted patch fixing NaN behaviour in VMLA/VMLS/VNMLA/VNMLS == other == * the Google Summer of Code QEMU project to work on upstreaming some of the Android emulator has been approved; I will be mentoring Patrick Jackson, who is the student who will be doing this work * qemu-linaro 2011-05 is unlikely to have any code changes since 2011-04; we might release it anyway just because it's the final one of the cycle Current qemu patch status is tracked here: https://wiki.linaro.org/PeterMaydell/QemuPatchStatus Absences: 13-19 May: UDS, Budapest (maybe but unlikely) 15-16 August: QEMU/KVM strand at LinuxCon NA, Vancouver [LinuxCon proper follows on 17-19th]

14 years, 1 month

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Fwd: Linaro forums replaced by "Ask Linaro"

by Andrew Stubbs

There's already a couple of tools-related questions on here. We should probably make sure we monitor it regularly. This isn't to hard, once you're signed up, you can mark certain topics as 'interesting' and then you'll get email notifications when there's a post. Andrew -------- Original Message -------- Subject: Linaro forums replaced by "Ask Linaro" Date: Fri, 06 May 2011 15:58:53 +0200 From: Michael Opdenacker <michael.opdenacker(a)linaro.org> Organization: Linaro To: everyone <everyone(a)linaro.org> Greetings, We are pleased to announce the replacement of our forums by a new "Ask Linaro" service. Better than forums, we expect this service to bring more questions and answers, and incite people to join the Linaro community by sharing their experience. We count on your participation. See http://ask.linaro.org/ Cheers, Michael. -- Michael Opdenacker - Community Manager Linaro, http://linaro.org Cell: +33 621 604 642 IRC: 'opm' in #linaro on irc.freenode.net

14 years, 1 month

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Pushing to diverged branches

by Andrew Stubbs

Hi all, We seem to have had an accident! This morning I merged one of my patches to lp:gcc-linaro/4.6, and this afternoon I got an email from Launchpad notifying me that a mystery revision had been deleted. It seems that Richard has somehow overwritten my change with his. Luckily I've spotted it and will fix it now, but it could very easily have got lost. I'm not sure what's happened here, but I'm pretty sure bzr does not just do this silently. I thought you needed to specify --overwrite to do this on purpose, but perhaps there's a bzr bug here? Anyway, could everyone please be very careful when they do bzr push to the release branches. Thanks Andrew

14 years, 1 month

5
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[ACTIVITY] May 1-5

by Revital Eres

Hello, [1] Regarding the patch 'Support closing_branch_deps' http://gcc.gnu.org/ml/gcc-patches/2011-03/msg00350.html Continued discussions with Ayal Zaks (SMS maintainer) regrading this patch. (http://gcc.gnu.org/ml/gcc-patches/2011-05/msg00250.html) I'm now working on simplifying the patch for resubmission according the recommendation. [2] Regarding the patch 'Avoid considering debug_insn when calculating SCCs' http://gcc.gnu.org/ml/gcc-patches/2011-04/msg01294.html The problem exposed while testing patch [3] and it seems that is part of a bigger problem -- SMS does not support debug_insn properly. I've asked Alexandre Oliva who inserted the support for debug_insn to haifa sched and selective sched to help with that. [3] Regarding the patch 'Support instructions with REG_INC_NOTE' http://gcc.gnu.org/ml/gcc-patches/2011-04/msg01309.html The fix for debug_insn (which the patch [2] tries to solve) is needed for bootstrapping this patch. So I'm putting it on hold for now. Thanks, Revital

14 years, 1 month

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[ACTIVITY] May 1-5

by Ira Rosen

Hi, - backported vzip fix to GCC 4.5 and 4.6 (PR 48252) - merged auto-detection of vector size patch to gcc-linaro 4.6 - started looking into vectorization of ffmpeg Ira

14 years, 1 month

1
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uboot data abort when optimizated with Os under Linaro toolchain 4.5 2011.03/04

by Yuping Luo

Hi, I am trying add usb gadget mass storage to uboot , and got run-time abortion on usbmsd.c with the default u-boot Os option. I use linaro 2011.03 4.5.3 version, and my trials as following: 1) During debugging , I found the abort exception in usbmsd_init_strings(). if declaring it with noinline function, like static void usbmsd_init_strings (void) __attribute__((noinline)); it works, however, next steps still failed. 2) compling uboot with O0, everyhing is ok. 3) try other toolchain. It works with codesourcery's 2011.03-41 and ubuntu 4.5 version, while failed with 2011.04 4.5 linaro version. 4) I have dumped the obj files, seeming some funcs optimized ,analysing the details is out of my knowledge, :( . please check the src and objdump files in one compressed file) toolchain: ypluo@ypluo-dt:~/work/Current/L38EVB/Main/out/prima2cb$ arm-none-linux-gnueabi-gcc --v Using built-in specs. COLLECT_GCC=arm-none-linux-gnueabi-gcc COLLECT_LTO_WRAPPER=/home/ypluo/work/Current/Tools/toolchain/linaro-201103-csr-build-armv7-vfpv3_x86_32/bin/../libexec/gcc/arm-none-linux-gnueabi/4.5.3/lto-wrapper Target: arm-none-linux-gnueabi Configured with: /media/8ccb10fd-862c-47d2-99fb-144e7188e1fb/home/vmuser/development/toolchain/build-toolchain/gcc-linaro-4.5-2011.03-0/configure --target=arm-none-linux-gnueabi --prefix=/media/8ccb10fd-862c-47d2-99fb-144e7188e1fb/home/vmuser/development/toolchain/build-toolchain/tools --enable-languages=c,c++ --with-arch=armv7-a --with-float=softfp --with-fpu=vfpv3-d16 --with-mode=thumb --enable-shared --enable-multiarch --enable-threads=posix --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --disable-werror --with-pkgversion='Ubuntu/Linaro 4.5-2011.3-csr-build' --enable-poison-system-directories Thread model: posix gcc version 4.5.3 20110221 (prerelease) (Ubuntu/Linaro 4.5-2011.3-csr-build) ypluo@ypluo-dt:~/work/Current/L38EVB/Main/out/prima2cb$ /home/ypluo/mywork/toolchain/arm-2011.03/bin/arm-none-linux-gnueabi-gcc --v Using built-in specs. COLLECT_GCC=/home/ypluo/mywork/toolchain/arm-2011.03/bin/arm-none-linux-gnueabi-gcc COLLECT_LTO_WRAPPER=/mywork/toolchain/arm-2011.03/bin/../libexec/gcc/arm-none-linux-gnueabi/4.5.2/lto-wrapper Target: arm-none-linux-gnueabi Configured with: /scratch/janisjo/arm-linux-lite/src/gcc-4.5-2011.03/configure --build=i686-pc-linux-gnu --host=i686-pc-linux-gnu --target=arm-none-linux-gnueabi --enable-threads --disable-libmudflap --disable-libssp --disable-libstdcxx-pch --enable-extra-sgxxlite-multilibs --with-arch=armv5te --with-gnu-as --with-gnu-ld --with-specs='%{save-temps: -fverbose-asm} %{funwind-tables|fno-unwind-tables|mabi=*|ffreestanding|nostdlib:;:-funwind-tables} -D__CS_SOURCERYGXX_MAJ__=2011 -D__CS_SOURCERYGXX_MIN__=3 -D__CS_SOURCERYGXX_REV__=41 %{O2:%{!fno-remove-local-statics: -fremove-local-statics}} %{O*:%{O|O0|O1|O2|Os:;:%{!fno-remove-local-statics: -fremove-local-statics}}}' --enable-languages=c,c++ --enable-shared --enable-lto --enable-symvers=gnu --enable-__cxa_atexit --with-pkgversion='Sourcery G++ Lite 2011.03-41' --with-bugurl=https://support.codesourcery.com/GNUToolchain/ --disable-nls --prefix=/opt/codesourcery --with-sysroot=/opt/codesourcery/arm-none-linux-gnueabi/libc --with-build-sysroot=/scratch/janisjo/arm-linux-lite/install/arm-none-linux-gnueabi/libc --with-gmp=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr --with-mpfr=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr --with-mpc=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr --with-ppl=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr --with-host-libstdcxx='-static-libgcc -Wl,-Bstatic,-lstdc++,-Bdynamic -lm' --with-cloog=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr --with-libelf=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr --disable-libgomp --enable-poison-system-directories --with-build-time-tools=/scratch/janisjo/arm-linux-lite/install/arm-none-linux-gnueabi/bin --with-build-time-tools=/scratch/janisjo/arm-linux-lite/install/arm-none-linux-gnueabi/bin Thread model: posix gcc version 4.5.2 (Sourcery G++ Lite 2011.03-41) Please let me know if other info needed. Many thanks. Yuping

14 years, 1 month

2
1
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uboot data abort when optimizated with Os under Linaro toolchain 4.5 2011.03/04

by Yuping Luo

Hi, I am trying add usb gadget mass storage to uboot , and got run-time abortion on usbmsd.c with the default u-boot Os option. I use linaro 2011.03 4.5.3 version, and my trials as following: 1) During debugging , I found the abort exception in usbmsd_init_strings(). if declaring it with noinline function, like static void usbmsd_init_strings (void) __attribute__((noinline)); it works, however, next steps still failed. 2) compling uboot with O0, everyhing is ok. 3) try other toolchain. It works with codesourcery's 2011.03-41 and ubuntu 4.5 version, while failed with 2011.04 4.5 linaro version. 4) I have dumped the obj files, seeming some funcs optimized , analysing the details is out of my knowledge, :( . please check the attached three files. toolchain: ypluo@ypluo-dt:~/work/Current/L38EVB/Main/out/prima2cb$ arm-none-linux-gnueabi-gcc --v Using built-in specs. COLLECT_GCC=arm-none-linux-gnueabi-gcc COLLECT_LTO_WRAPPER=/home/ypluo/work/Current/Tools/toolchain/linaro-201103-csr-build-armv7-vfpv3_x86_32/bin/../libexec/gcc/arm-none-linux-gnueabi/4.5.3/lto-wrapper Target: arm-none-linux-gnueabi Configured with: /media/8ccb10fd-862c-47d2-99fb-144e7188e1fb/home/vmuser/development/toolchain/build-toolchain/gcc-linaro-4.5-2011.03-0/configure --target=arm-none-linux-gnueabi --prefix=/media/8ccb10fd-862c-47d2-99fb-144e7188e1fb/home/vmuser/development/toolchain/build-toolchain/tools --enable-languages=c,c++ --with-arch=armv7-a --with-float=softfp --with-fpu=vfpv3-d16 --with-mode=thumb --enable-shared --enable-multiarch --enable-threads=posix --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --disable-werror --with-pkgversion='Ubuntu/Linaro 4.5-2011.3-csr-build' --enable-poison-system-directories Thread model: posix gcc version 4.5.3 20110221 (prerelease) (Ubuntu/Linaro 4.5-2011.3-csr-build) ypluo@ypluo-dt:~/work/Current/L38EVB/Main/out/prima2cb$ /home/ypluo/mywork/toolchain/arm-2011.03/bin/arm-none-linux-gnueabi-gcc --v Using built-in specs. COLLECT_GCC=/home/ypluo/mywork/toolchain/arm-2011.03/bin/arm-none-linux-gnueabi-gcc COLLECT_LTO_WRAPPER=/mywork/toolchain/arm-2011.03/bin/../libexec/gcc/arm-none-linux-gnueabi/4.5.2/lto-wrapper Target: arm-none-linux-gnueabi Configured with: /scratch/janisjo/arm-linux-lite/src/gcc-4.5-2011.03/configure --build=i686-pc-linux-gnu --host=i686-pc-linux-gnu --target=arm-none-linux-gnueabi --enable-threads --disable-libmudflap --disable-libssp --disable-libstdcxx-pch --enable-extra-sgxxlite-multilibs --with-arch=armv5te --with-gnu-as --with-gnu-ld --with-specs='%{save-temps: -fverbose-asm} %{funwind-tables|fno-unwind-tables|mabi=*|ffreestanding|nostdlib:;:-funwind-tables} -D__CS_SOURCERYGXX_MAJ__=2011 -D__CS_SOURCERYGXX_MIN__=3 -D__CS_SOURCERYGXX_REV__=41 %{O2:%{!fno-remove-local-statics: -fremove-local-statics}} %{O*:%{O|O0|O1|O2|Os:;:%{!fno-remove-local-statics: -fremove-local-statics}}}' --enable-languages=c,c++ --enable-shared --enable-lto --enable-symvers=gnu --enable-__cxa_atexit --with-pkgversion='Sourcery G++ Lite 2011.03-41' --with-bugurl=https://support.codesourcery.com/GNUToolchain/ --disable-nls --prefix=/opt/codesourcery --with-sysroot=/opt/codesourcery/arm-none-linux-gnueabi/libc --with-build-sysroot=/scratch/janisjo/arm-linux-lite/install/arm-none-linux-gnueabi/libc --with-gmp=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr --with-mpfr=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr --with-mpc=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr --with-ppl=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr --with-host-libstdcxx='-static-libgcc -Wl,-Bstatic,-lstdc++,-Bdynamic -lm' --with-cloog=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr --with-libelf=/scratch/janisjo/arm-linux-lite/obj/host-libs-2011.03-41-arm-none-linux-gnueabi-i686-pc-linux-gnu/usr --disable-libgomp --enable-poison-system-directories --with-build-time-tools=/scratch/janisjo/arm-linux-lite/install/arm-none-linux-gnueabi/bin --with-build-time-tools=/scratch/janisjo/arm-linux-lite/install/arm-none-linux-gnueabi/bin Thread model: posix gcc version 4.5.2 (Sourcery G++ Lite 2011.03-41) Please let me know if other info needed. Many thanks. Yuping

14 years, 1 month

2
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[ACTIVITY] 26th -28th April

by Andrew Stubbs

My MOVW patch from last week left an unused variable that killed -Werror builds, so I posted a new patch to fix it. http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg04141.html Ramana approved that in record time, so I've committed it. Tom has committed Mark Shinwell's BRANCH_COST patch upstream, so I have backported it to Linaro GCC 4.6. Maxim has committed his compound conditionals patch upstream, so I've backported that to Linaro GCC 4.6 also. Reviewed what other patches are queued for forward porting to 4.6/7, hoping that other's might have picked some of them off, and found no other progress just yet. Reduced the test case for GCC PR48783. For some reason it is retaining ".global" directives for symbols that have been optimized away, which leads to link errors in the kernel build. Tried to find out why the "discourage neon in A8" patch has caused test failures. I'm still not sure - I've asked Michael Hope to rerun the tests in case it's just random. Reposted the EABI half-precision patch with the extra bits Joseph says it needed in the version scripts. http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg04251.html Looked at the linking problem reported by Barry Song on the linaro-toolchain list. * Other Public holidays on Monday and Friday. * Future I will be attending UDS in Budapest from 8th - 14th May. I shall continue to read my email, but will not be attending any calls. ---- Upstream patched requiring review: * NEON scheduling patch http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01431.html * ARM Thumb2 addw/subw support. http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg03783.html * ARM Thumb2 Replicated constants http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg03883.html * ARM EABI half-precision function names (reposted 2011-04-27). http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg04251.html

14 years, 1 month

1
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linaro-android track

by Zach Pfeffer

All, I apologize for the broad distribution. Alexander and I have been getting the Android track going. We have the following topics. Most of these have subscribers. Would everyone mind taking a look through this list and subscribing or suggesting people who should be involved? I'll be getting more details into each of these this week. Hosting and Distribution of Linaro Builds https://blueprints.launchpad.net/linaro-android/+spec/linaro-android-o-buil… This topic will focus on building and distributing Linaro Android builds. Topics will include: binary and source distribution, source and binary overlays (proprietary components and blobs from TI, Samsung, etc), license click-through, build and distribution location or method (host images and/or support on-demand image builds) and release tagging and naming. Subscribe: https://blueprints.launchpad.net/linaro-android/+spec/linaro-android-o-buil… Android Code Review https://blueprints.launchpad.net/linaro-android/+spec/linaro-android-o-code… This discussion will focus on Android code review. Topics will include Gerrit, continuous integration, maintainers, reviewers and validation. We'll focus on integrating the Android development model with Linaro. Subscribe: https://blueprints.launchpad.net/linaro-android/+spec/linaro-android-o-code… Android Continuous Integration and Building https://blueprints.launchpad.net/linaro-android/+spec/linaro-android-o-cont… This discussion will focus on Linaro Android continuous integration and builds. Topics include: infrastructure and validation requirements, test subsets for merges and unit testing. Subscribe: https://blueprints.launchpad.net/linaro-android/+spec/linaro-android-o-cont… Android LEB Validation and Test Suite https://blueprints.launchpad.net/linaro-android/+spec/linaro-android-o-vali… This discussion will focus on LEB validation and test suites. Topics will include: Monkey, CTS, Monkeyrunner, unit-tests, continuous integration merge tests. Subscribe: https://blueprints.launchpad.net/linaro-android/+spec/linaro-android-o-vali… 2011 ELC Follow Up and Planning https://blueprints.launchpad.net/linaro-android/+spec/linaro-android-o-2011… Linaro had a good meeting at the 2011 Embedded Linux Conference. Many things were discussed. This session will talk about next steps and future planning. Subscribe: https://blueprints.launchpad.net/linaro-android/+spec/linaro-android-o-2011… Android Hardfloat Experiment https://blueprints.launchpad.net/linaro-android/+spec/linaro-android-o-hard… This session will discuss strategies to find hot-spots that could benefit from hardfloat without breaking overall binary compatibility with market apps. Subscribe: https://blueprints.launchpad.net/linaro-android/+spec/linaro-android-o-hard… Android LEB Documentation https://blueprints.launchpad.net/linaro-android/+spec/linaro-android-o-leb-… This session will focus on discussing what documentation we need for LEB use and bundled with releases. Subscribe: https://blueprints.launchpad.net/linaro-android/+spec/linaro-android-o-leb-… Linaro Android Toolchain Distribution https://blueprints.launchpad.net/linaro-android/+spec/linaro-android-o-tool… This session will discuss how to distribute the various components of the Linaro toolchain. We'll discuss NDK and platform distribution, support on Ubuntu, Fedora and Mac, what components do we need to publish and benchmarking toolchain improvements. Subscribe: https://blueprints.launchpad.net/linaro-android/+spec/linaro-android-o-tool… LEB Board Review and Deliverable Requirements https://blueprints.launchpad.net/linaro-android/+spec/linaro-android-o-leb-… This discussion will talk about defining new member deliverable for Android LEBs, reviewing what's been delivered and assessing if we can raise the bar, discuss other low-cost high-volume board that currently exist or are on the way (Nexus One, Nexus S, Snowball), talk about LEB candidates, discuss cost ceilings (is the Elba board too expensive, for instance). Subscribe: https://blueprints.launchpad.net/linaro-android/+spec/linaro-android-o-leb-… Open Source Development for Non-Application Cores https://blueprints.launchpad.net/linaro-android/+spec/linaro-android-o-non-… This session will explore how to open up development for the various DSP and video cores that exist on many SoCs that are running Android to allow open source development of multimedia acceleration. Subscribe: https://blueprints.launchpad.net/linaro-android/+spec/linaro-android-o-non-… Upstream Android Build https://blueprints.launchpad.net/linaro-android/+spec/linaro-android-o-upst… This topic will discuss which changes we can upstream. Subscribe: https://blueprints.launchpad.net/linaro-android/+spec/linaro-android-o-upst… ADB Shell Improvements https://blueprints.launchpad.net/linaro-android/+spec/linaro-android-o-adb-… The adb shell lacks many features we take for granted. There is a need for a little more functionality, this session will discuss this. Subscribe: https://blueprints.launchpad.net/linaro-android/+spec/linaro-android-o-adb-… Android Beyond Phones and Advanced Topics https://blueprints.launchpad.net/linaro-android/+spec/linaro-android-o-beyo… This session will discuss the future of Android. It'll be a brainstorming session to talk about topics like: dual lib (bionic/glibc) support in Android, bringing apt-get into Android, Android as a general computing platform, expanded enterprise networking, expanded packages, traditional Linux application support, security certification and headless Android. Subscribe: https://blueprints.launchpad.net/linaro-android/+spec/linaro-android-o-beyo… JTAG for the World https://blueprints.launchpad.net/linaro-android/+spec/linaro-android-o-jtag This session will talk about improving tools for Ubuntu hosted JTAG tools, open JTAG script development and available JTAG platforms. Subscribe: https://blueprints.launchpad.net/linaro-android/+spec/linaro-android-o-jtag… -Zach

14 years, 2 months

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[ACTIVITY] Apr.25 -- May.01

by Chung-Lin Tang

== Last week == * CoreMark ARMv6/v7 regression patch set for combine: exchanged some comments on upstream list with Jeff Law. Started some testing on powerpc64, hit some issues with native bootstrap that I don't think I completely overcome, but at least completed a 32-bit bootstrap successfully. Unfortunately hit two regressions after running tests, will work on fixing this week, and update the upstream submission. * PR48783: unused reference to __aeabi_uldivmod. Investigated and found this to be a case where during RTL expand, .global directives for the __aeabi_* runtime symbols are directly inserted after some div optab didn't have the insns, and a libfunc was to be used. However later optimizations that removed the divisions left the .global symbols dangling with no uses. We could probably just avoid adding the directives completely for the EABI functions. * PR42017: ARM LR register not used in leaf functions. This is a case where DF takes EPILOGUE_USES as part of the initial live registers at end of functionn, and liveness computations never get to kill it, since there are no function calls to clobber in a leaf function. Submitted a patch to remove LR from EPILOGUE_USES before reload, awaiting review. * LP #689887: investigated more; not much progress, but found that the bootstrap fail happens only under --with-mode=thumb (Thumb-2). Under ARM mode the native bootstrap succeeds. == This week == * Try to fix the problems with the CoreMark combine patches. * Investigate more optimizations/bugs. * Prepare for travel to Budapest on Saturday.

14 years, 2 months

1
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[ACTIVITY] April 26-28

by Revital Eres

Hello, - Continued analysing DENbench benchmarks. - Discussed the SMS patched with Ayal Zaks (SMS maintainer). - Booked the flights for Budapest summit. Thanks, Revital

14 years, 2 months

1
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[ACTIVITY] April 27-28

by Ira Rosen

Hi, gcc-linaro/4.6 - if-conversion improvement (needed to vectorize Telecom/viterbi) - merged - auto-detection of vector size - proposed for merging GCC FSF - fixed PR 48765 on trunk - completed testig of vzip fix (PR 48252) on gcc 4.5 and gcc 4.6 Ira

14 years, 2 months

1
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[ACTIVITY] weekly status

by Ken Werner

Hi, libunwind: * the initial support for resuming at a certain stack frame went upsream * learned about the various signal frame layouts on ARM * RT frames, non-RT frames for present and pre 2.6.18 kernels * implemented support for RT signal frame detection on ARM * started to implement support for unw_resume if signal frames are involved * attended a class on Friday Note: Monday was a public holiday. Regards Ken

14 years, 2 months

1
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[ACTIVITY] Apr 26 - Apr 29

by Ulrich Weigand

== GDB == * Committed series of patches to fix bug #615978 (Failure to software single-step into signal handler) to mainline and Linaro GDB. * Drafted blueprint linaro-toolchain-o-cross-debug == GCC == * Split bug #771900 (Linaro GCC 4.5 switch optimization breaks profiled bootstrap) off bug #759409 (Profiled bootstrap fails in GCC 4.5). Tracked down root cause of bug #759409 / PR middle-end/43085, and posted fix to gcc-patches. 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, 2 months

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Toolchain summit blueprints

by Michael Hope

Hi there. The toolchain session blueprints for the summit are now up on Launchpad: https://blueprints.launchpad.net/linaro-toolchain?searchtext=toolchain-o You can check out the schedule here: http://summit.ubuntu.com/uds-o/track/linaro-toolchain/ although it's really only for show at the moment. Expect things to jump around as the constraints kick in. Please go through these blueprints and subscribe yourself to them. You can check your list of blueprints at: https://blueprints.launchpad.net/people/+me?searchtext=toolchain-o -- Michael

14 years, 2 months

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"BFD_ASSERT (out_attr[Tag_ABI_HardFP_use].i == 0) " assert

by Barry Song

Hi All, I found Jie has committed a patch "http://sourceware.org/ml/binutils/2010-05/msg00083.html". I am using the newest binary utils(2.21) and encounted the following ASSERT in arm_elf32.c: + if (out_attr[i].i == 0) + { + BFD_ASSERT (out_attr[Tag_ABI_HardFP_use].i == 0); My compiling options are as below, ASM_FLAGS := \ -gdwarf-2 \ -mfpu=vfp \ -mfloat-abi=softfp \ -mthumb-interwork C_FLAGS := \ $(ASM_FLAGS) \ -O3 -Wno-all \ -fno-optimize-sibling-calls \ -mlong-calls \ -ffunction-sections \ CPP_FLAGS := \ -fno-rtti \ -fno-exceptions \ LINK_FLAGS := \ --gc-sections -nostdlib \ -L ../stdlib \ -Wl,--as-needed \ -Wl,-no-enum-size-warning \ --cref \ ARFLAGS := \ rcs Can anyone give me any tip about why the assert is triggered? I have reported a bug here: http://sourceware.org/bugzilla/show_bug.cgi?id=12700 But not sure whether it is a bug. -barry

14 years, 2 months

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__aeabi_uldivmod undefined for sound/soc/codecs/snd-soc-wm8974.ko, snd-soc-wm8940.ko and snd-soc-wm8510.ko

by Barry Song

Hi All, I am using 2011.3 4.5 linaro GCC(armv7-a vfpv3d16) to compile kernel and modules. I select to compile all codecs as modules: "config SND_SOC_ALL_CODECS tristate "Build all ASoC CODEC drivers" " as M and I2C/SPI too. Then in the kernel dir, run "make" to get both vmlinux and modules, I found snd-soc-wm8974.ko, snd-soc-wm8940.ko and snd-soc-wm8510.ko will fail due to "__aeabi_uldivmod undefined". If i comment do_div() in these codec drivers, this issue will disappear. But it is strange there are many codecs which use do_div() too, for example: sound/soc/codecs/max98088.c sound/soc/codecs/max9850.c sound/soc/codecs/wm8350.c sound/soc/codecs/wm8400.c sound/soc/codecs/wm8510.c sound/soc/codecs/wm8580.c sound/soc/codecs/wm8753.c sound/soc/codecs/wm8804.c sound/soc/codecs/wm8900.c sound/soc/codecs/wm8904.c sound/soc/codecs/wm8940.c sound/soc/codecs/wm8955.c sound/soc/codecs/wm8960.c sound/soc/codecs/wm8974.c sound/soc/codecs/wm8978.c sound/soc/codecs/wm8985.c sound/soc/codecs/wm8990.c sound/soc/codecs/wm8991.c sound/soc/codecs/wm8993.c sound/soc/codecs/wm8994.c sound/soc/codecs/wm8995.c sound/soc/codecs/wm9081.c but others can pass the compiling except those 3 modules. Is it due to a wrong optimization by gcc? Other information: 1. old tool-chains we are using can pass the compiling of the 3 modules. 2. If i built all codecs into kernel image, these 3 drivers don't report error while compiling. Thanks Barry

14 years, 2 months

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Re: [alsa-devel] [PATCH] ASoC: prevent compilers from optimising pll calculation into __aeabi__uldivmod

by Barry Song

2011/4/27 Mark Brown <broonie(a)opensource.wolfsonmicro.com> > > On Wed, Apr 27, 2011 at 04:50:12PM +0800, Barry Song wrote: > > > Marking pll_factors() as noinline or putting asm("" : "+r"(source)); before the > > call to do_div() works around the problem. > > If we do have to do something in the callers rather than in do_div() the > annotation seems substantially more taseful than inserting a random asm > into the code. I agree. for this patch which will not be applied, people can just get information about how to workaround the gcc issue while they have the same problem. google can find there are other people who failed to compile wm8974 module too. eg. http://irclogs.ubuntu.com/2010/03/30/%23ubuntu-arm.txt Andrew Stubbs, Michael Hope in Linaro's toolchain team are working hard on this gcc issue. there have been many update today: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48783

14 years, 2 months

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-O2 cause optimization issues while va parameters functions

by Barry Song

Hi All, As i have frequently said, we are using 2011.3 4.5 linaro gcc. For the following codes, if we compile it by -O2, it will crash with "segment fault", if we just comment " if(unifi_debug >= level) {", all will be ok. If we don't compile it by -O2, all will be ok too. #include <stdlib.h> #include <stdio.h> #include <stdarg.h> #define DEBUG_BUFFER_SIZE 80 int unifi_debug = 5; void unifi_trace(void* ospriv, int level, const char *fmt, ...) { static char s[DEBUG_BUFFER_SIZE]; va_list args; unsigned int len; if(unifi_debug >= level) { va_start(args, fmt); len = vsnprintf(&(s)[0], (DEBUG_BUFFER_SIZE), fmt, args); va_end(args); if (len >= DEBUG_BUFFER_SIZE) { (s)[DEBUG_BUFFER_SIZE - 2] = '\n'; (s)[DEBUG_BUFFER_SIZE - 1] = 0; } printf("%s", s); } } int main(void) { char *prog = "/usr/sbin/unififw"; unifi_trace(NULL, 1, "start %s\n", prog); return 0; } Thanks Barry

14 years, 2 months

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Sessions for the summit

by Michael Hope

Hi there. A first-pass list of summit sessions is up at: https://wiki.linaro.org/MichaelHope/Sandbox/1111Blueprints The next step is to investigate these areas and come up with a basic plan that can be discussed during the summit. I've put your names against the sessions as follows: Andrew: Broad tuning Dave: String routines everywhere Dave: QEMU topic #2 Doug: STM support Ira: Vectoriser and NEON performance Ken: 64 bit sync primitives Ken: Good backtracing Ken: End-developer tools bluesky Michael: Publish benchmarking of the toolchain Michael: Binary builds Michael: Deeper validation Peter: QEMU bluesky Ramana: Thumb-2 performance brainstorm Ramana: GCC backend rework Ulrich: GDB as a cross-debugger Ira and Dave, I know you won't be at the summit but we'll see about being able to call in. Could you all please have a read of the outline, investigate these topics, and draft up a blueprint-style list of work items to achieve it? Record any notes in the sandbox page[5] or in a child page if needed. Larger topics may warrant a specification[1]. I'd like these done by the end of next week. I'd expect to spend up to a day on the topics you already understand and more on broad topics. For reference, the see the draft TRs[2] and spreadsheet [3]. I've added some GDB topics to the spreadsheet that still need to go onto the wiki page. The outlines should touch each of these TRs in some way so let me know if I've missed anything. There's more good information on the process and style at: https://wiki.linaro.org/Process/Blueprints https://wiki.linaro.org/Process/WorkItemsHowto https://wiki.linaro.org/Resources/FAQ Questions? Need more detail? Let me know. -- Michael [1] https://wiki.linaro.org/Process/SpecTemplate [2] https://wiki.linaro.org/Cycles/1111/TechnicalTopics/Toolchain [3] https://spreadsheets.google.com/ccc?key=0Ap7fWLePADFVdHkxYy1INTZmMEd4bkwxSG… [4] there is no 4... [5] https://wiki.linaro.org/MichaelHope/Sandbox/1111Blueprints

14 years, 2 months

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[ACTIVITY] 18th - 21st April

by Andrew Stubbs

Merged & tested the outstanding merge requests into Linaro GCC. Spin the Linaro GCC 4.5 and 4.6 releases. Uploaded the tarballs to Michael. Submitted a patch upstream that removed some redundant code that had confused me a introduced a bug into my Thumb2 constants patch. http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg03756.html This patch is now approved and committed upstream. I'll commit it internally when the rest of my ARM/Thumb constant handling changes are upstream. Worked on addressing RichardE's concerns with my Thumb2 constants patch. Tried to split it into smaller chunks, and rename the constraints. Posted the patches upstream: 1. a small patch upstream to clean up MOWV support. http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg03768.html (Now approved and committed.) 2. ADDW and SUBW support. http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg03783.html 3. Replicated constants for constant splitting. http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg03883.html Committed upstream Dan's Vector shift test cases patch that was approved last week. Pushed the same patch to Linaro GCC 4.6. ---- Upstream patched requiring review: * NEON scheduling patch http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01431.html * ARM EABI half-precision functions (reposted 2011-04-14) http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg03210.html * ARM Thumb2 addw/subw support. http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg03783.html * ARM Thumb2 Replicated constants http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg03883.html

14 years, 2 months

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Performance meeting agenda for today.

by Ramana Radhakrishnan

Hi, Agenda for today's performance call . Sorry about the last minute posting and I'll put this in the wiki soon enough. 1. Sync-up on what's been happening around the group: a. Coremark regressions. b. Thumb2 constants patch. c. divmodsi4 and vfp register moves. d. DENBench investigations. 2. Planning for the summit and turning some of the ideas into blueprints. 3. AOB. cheers Ramana

14 years, 2 months

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[ACTIVITY] Apr.18 -- Apr.24

by Chung-Lin Tang

== Last week == * PR48250, rehaul arm_legitimize_reload_address(). Richard Sandiford caught a bug of mine where I overlooked the valid index range of NEON quad-word load/stores. Quickly whipped up a fix, soon approved and committed upstream. * LP #744754, ICE in NEON struct-mode auto-inc-dec MEMs. Pushed upstream patch for a merge to Linaro 4.5. * PR46888, bit-field insert optimization patch. Resumed investigating, mailed Andrew Pinski for more information on that REG_EQUAL note issue he mentioned on gcc-patches; can't quite reproduce it myself. * CoreMark ARMv6/v7 regressions: posted a patch set to gcc-patches. Still waiting review. * Reported to Bernd and AndrewS on an issue (LP #748138) which seems to be related to the shrink-wrap patch. This ICE does not seem to be avoided by doing -fno-shrink-wrap. * A few tasks related to Linaro-Budapest event travel. == This week == * Do the merge of the new combine patches to Linaro, and test. * LP #689887 is still in progress. * Hope to experiment with a few more optimization ideas.

14 years, 2 months

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NEON intrinsics vs. assembly code

by Richard Sandiford

Michael mentioned that some users reported seeing better preformance from RVCT using arm_neon.h then they did when coding directly in assembler. He suggested we try the same thing for GCC. Here's an experiment using the example that Jim Huang posted to the dev list recently: https://wiki.linaro.org/RichardSandiford/Sandbox/IntrinsicsPerformance The summary is that the C version needs to borrow a trick from the assembly code in order to be competitive. If it does that, though, the C code can be faster. I think this is mostly down to scheduling, although I haven't checked in detail yet. Richard

14 years, 2 months

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[ACTIVITY] 2011-04-21

by David Gilbert

== String and Memory routines == * Profiled denbench with perf and produced a set of stats to show which programs spent how much time in libc and how much time was spent in each routine. While some of the benchmarks are good (like aes) and spend almost no time in libc some of the others (MPEG codecs especially) seem to spend significant times in libc. * Ran all of denbench through latrace to generate sets of library calls; post processed them to extract the section between the clock() calls (and hence in the timed portion) and analysed the hot library calls. I've looked at some of the output but not all of it yet; I get output like: Memcpy stats (dst align/src align/length/number of occurrences/total size copied) memcpy: 0,0,1 , 1588520, 1588520 memcpy: 16,28,4096 , 1, 4096 memcpy: 4,20,16384 , 855, 14008320 This shows that for a bunch of tests they do an inordinate number of 1 byte memcpy's, and a few hundred larger memcpy's with an address %32 which is 4 (and destination %32 is 20) - so not aligned but at least equally misaligned. * Started writing up a report on some of the stats * Also started to try and extract the same stuff from SPEC2k6 == QEMU == * Tested Peter's QEmu release earlier in the week (On Lucid so didn't hit his natty bug) * Wrote up a couple of specs (one for TrustZone and the other for Device Tree integration)

14 years, 2 months

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[ACTIVITY] Weekly status

by Revital Eres

Hello, Submitted the following patches to GCC trunk: [1] Avoid unfreed memory when SMS fails (committed to trunk GCC) - http://gcc.gnu.org/ml/gcc-patches/2011-04/msg01204.html [2] Free sccs field (committed to trunk GCC)- http://gcc.gnu.org/ml/gcc-patches/2011-04/msg01205.html [3] New flag to apply SMS when SC equals 1 (committed to trunk GCC) - http://gcc.gnu.org/ml/gcc-patches/2011-04/msg01293.html [4] Avoid considering debug_insn when calculating SCCs - http://gcc.gnu.org/ml/gcc-patches/2011-04/msg01294.html [5] Support instructions with REG_INC_NOTE - http://gcc.gnu.org/ml/gcc-patches/2011-04/msg01309.html Returned looking into DENbench's benchmarks. Thanks, Revital

14 years, 2 months

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[ACTIVITY] Apr 18 - Apr 21

by Ulrich Weigand

== GDB == * Created Linaro GDB 7.2-2011.04-0 release. * Committed patch to fix accessing "fpscr" register to Linaro GDB. * Failure to disable address space randomization (bug #616001) has been fixed in the kernel; closed the Linaro GDB bug. == GCC == * Ongoing analysis of bug #759409 (Profiled bootstrap fails). Identified two independent problems, one related to a new CodeSourcery feature, and one a mis-optimization of final-stage cc1plus which is also present in FSF GCC 4.5 (PR 43085). Ongoing investigation to track down the root cause of the latter problem. == Schedule == * Public holidays 04/22 - 04/25. 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, 2 months

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[ACTIVITY] report week 16

by Peter Maydell

RAG: Red: Amber: Green: another monthly qemu-linaro release out on schedule Current Milestones: | Planned | Estimate | Actual | qemu-linaro 2011-04 | 2011-04-21 | 2011-04-21 | 2011-04-21 | Historical Milestones: finish qemu-cont-integration | 2011-01-25 | 2011-01-25 | handed off | first qemu-linaro release | 2011-02-08 | 2011-02-08 | 2011-02-08 | qemu-linaro 2011-03 | 2011-03-08 | 2011-03-08 | 2011-03-08 | == maintain-beagle-models == * qemu-linaro 2011.04 tested and released * had to do another last minute -1 respin to fix a problem caught by ubuntu package builds; we need to come up with a process that lets us do test package builds prior to release so we can fix this sort of issue in a less last-minute fashion == merge-correctness-fixes == * sent patch: fix semihosting SYS_HEAPINFO (seems to have issues though) * sent patch: UNDEFs in Neon load/store space * sent patches: fix build issues on sparc * sent patch: bump the initrd load address to work with bigger kernels * sent patch: set Invalid flag for float-to-int conversion of NaN * sent patch: move vld/vst multiple to helper functions * reviewed patches from Aurelien doing some general softfloat cleanup * sent out a version of my performance counters patch which just does a basic dummy implementation without the cycle counter (since the cycle counter bits were going off down a blind alley rather and this part is the last thing needed to be able to boot Linaro vexpress images on stock upstream QEMU) == other == * trying to nail down proposed QEMU work for next cycle; work-in-progress: https://wiki.linaro.org/PeterMaydell/Qemu1111 * meetings: toolchain, standup Current qemu patch status is tracked here: https://wiki.linaro.org/PeterMaydell/QemuPatchStatus Absences: Holiday: 22 Apr - 2 May 9-13 May: UDS, Budapest (maybe) 15-16 August: QEMU/KVM strand at LinuxCon NA, Vancouver [LinuxCon proper follows on 17-19th]

14 years, 2 months

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[ACTIVITY] weekly status

by Ken Werner

Hi, libunwind: * added initial support for resuming at a certain stack frame * posted unw_resume support plus some some testsuite fixes on the ml * there are still some issues left if signal handlers/frames are involved Note: Friday is a public holiday. Regards Ken

14 years, 2 months

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[ACTIVITY] Weekly status

by Richard Sandiford

== This week == * Iterated with upstream on some of the vectorisation patches. I think only half a patch (the ARM implementation of array_mode_supported_p) is still pending review; everything else has been approved. * Backported the vldN and vstN intrinsics to Linaro 4.5. * Finished off the microbenchmarks for libav. * One of the problems in the original libav output was that the vectoriser didn't realise that a group of N accesses really did form a group. It instead generated N separate interleave operations and took 1 vector from each. Submitted a fix for that, which is now committed upstream. Updated the libav wiki page with the new, improved output. (This actually allowed more libav loops to be vectorised, as well as improving the output from some of the existing ones. I haven't looked at the new ones. I expect this comes from interleaved stores.) * Wrote an arm_neon.h version of Android's scanline_t32cb16_neon and compared it with the original. * Started (and only started) seeing how the vectorisation stuff affects DENbench. * Backported the dwarf2out OOM fix to Linaro 4.6. == Next week == * Do something useful on DENbench. * If all goes well, commit the vectorisation work upstream and backport it to Linaro 4.5 and 4.6. ...but it's only a three day week. Richard

14 years, 2 months

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Linaro QEMU 2011.04-1 released

by Peter Maydell

The Linaro Toolchain Working Group is pleased to announce the release of Linaro QEMU 2011.04-1. Linaro QEMU 2011.04-1 is the third release of qemu-linaro. Based off upstream (trunk) qemu, it includes a number of ARM-focused bug fixes and enhancements. Interesting changes include: - Compiling for an ARM host in Thumb mode now works - As usual, various minor correctness fixes and other upstream changes Known issues: - The beagle and beaglexm models do not support USB, so there is no keyboard, mouse or networking (#708703) The only change over the shortlived 2011.04-0 is to fix a compilation failure with gcc 4.5. The source tarball is available at: https://launchpad.net/qemu-linaro/+milestone/2011.04-1 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, 2 months

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Linaro GDB 7.2 2011-04 released

by Michael Hope

The Linaro Toolchain Working Group is pleased to announce the release of Linaro GDB 7.2. Linaro GDB 7.2 2011.04 is the fifth release in the 7.2 series. Based off the latest GDB 7.2, it includes a number of ARM-focused bug fixes. This release fixes: * LP: #684218 Failure to backtrace out of glibc system call stubs * LP: #667309 failed to single step over bad thumb->arm boundary * Fix accessing "fpscr" register The source tarball is available at: https://launchpad.net/gdb-linaro/+milestone/7.2-2011.04-0 More information on Linaro GDB is available at: https://launchpad.net/gdb-linaro -- Michael

14 years, 2 months

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Linaro GCC 4.5 and 4.6 2011-04 released

by Michael Hope

The Linaro Toolchain Working Group is pleased to announce the release of both Linaro GCC 4.5 and Linaro GCC 4.6. Linaro GCC 4.5 2011.04 is the ninth release in the 4.5 series. Based off the latest GCC 4.5.2+svn171921, it adds new optimisations, support for Android, and fixes for many of the issues found in the last month. Linaro GCC 4.6 2011.04 is the second release in the 4.6 series. Based off the latest GCC 4.6.0+svn171921, it is the first supported release of the new series and includes a significant number of mainstreamed patches from 4.5. Interesting changes in 4.6 include: * Updates to 4.6.0+r171921 * Adds conditional store sinking to the vectoriser * Brings in a significant number of the Linaro GCC 4.5 patches that are in mainline Interesting changes in 4.5 include: * Updates to 4.5.2+r172013 * Disables the shrink wrap optimisation by default * Adds support for swing-modulo scheduling (SMS) on ARM * Adds support for Android and the Bionic C library * Optimises -fvar-tracking, greatly reducing memory used when compiling large files (seen in QEMU) Fixes: * 'volatile' being ignored on volatile struct members * A potential register clobber in arm_negdi2 * An error in libgcc that prevented it being built with -Os * Multiple shrink wrap bugs (LP: #731665, 721023, 736081, 758082, 730860, 736439, 721023) * LP: #730440 incorrect immediate for movt (seen in Firebird) * LP: #728315 extension elimination pass mishandles subregs of promoted variables (seen on MIPS) * LP: #675347 volatile int causes inline assembly build failure (seen in Qt) SMS is an optimisation that works on innermost loops and reorders the instructions by overlapping different locations. An example is that the values for the next loop may be loaded during the current loop, making the values already ready when the next loop starts. SMS is disabled by default. To try it, add the options '-fmodulo-sched -fmodulo-sched-allow-regmoves'. The source tarball is available from: https://launchpad.net/gcc-linaro/+milestone/4.5-2011.04-0 https://launchpad.net/gcc-linaro/+milestone/4.6-2011.04-0 Downloads are available from the Linaro GCC page on Launchpad: https://launchpad.net/gcc-linaro -- Michael

14 years, 2 months

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[OT] ti-omap-tools - script for setting up DVSDK 3 with various toolchains

by AJ ONeal

Here's a script for installing TI's DVSDK 3: https://bitbucket.org/thayne/ti-omap-tools/src Works with - CodeSourcery - OpenEmbedded - Linaro It will download the bazillion dependencies scattered across TI's site and makes it easier to gut the DVSDK's hard-coded paths to work for your setup. The DVSDK 4 isn't used because it is completely different from the DVSDK 3 and is much more difficult to root the hard paths and checks out of. AJ ONeal

14 years, 2 months

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Question on compressed vmlinux .got and .bss sections

by Shawn Guo

Hi toolchain, kernel folks, I'm seeing an interesting thing on .got and .bss sections of arch/arm/boot/compressed/vmlinux, and really need your expertise to shed some lights. I have an uninitialized variable 'uart_base' defined in misc.c. static unsigned long uart_base; $ arm-linux-gnueabi-objdump -D arch/arm/boot/compressed/misc.o Disassembly of section .bss: 00000000 <uart_base>: 0: 00000000 andeq r0, r0, r0 00000004 <__machine_arch_type>: 4: 00000000 andeq r0, r0, r0 [...] And section layout looks like the following. $ arm-linux-gnueabi-objdump -h arch/arm/boot/compressed/vmlinux SECTIOINS { ... _etext = .; _got_start = .; .got : { *(.got) } _got_end = .; .got.plt : { *(.got.plt) } _edata = .; . = ALIGN(4); __bss_start = .; .bss : { *(.bss) } _end = .; ... } $ arm-linux-gnueabi-objdump -h arch/arm/boot/compressed/vmlinux arch/arm/boot/compressed/vmlinux: file format elf32-littlearm Sections: Idx Name Size VMA LMA File off Algn 0 .text 001c474c 00000000 00000000 00008000 2**5 CONTENTS, ALLOC, LOAD, READONLY, CODE 1 .got 00000028 001c474c 001c474c 001cc74c 2**2 CONTENTS, ALLOC, LOAD, DATA 2 .got.plt 0000000c 001c4774 001c4774 001cc774 2**2 CONTENTS, ALLOC, LOAD, DATA 3 .bss 00000020 001c4780 001c4780 001cc780 2**2 ALLOC 4 .stack 00001000 001c47a0 001c47a0 001cc780 2**0 ALLOC 5 .comment 0000002a 00000000 00000000 001cc780 2**0 CONTENTS, READONLY 6 .ARM.attributes 00000031 00000000 00000000 001cc7aa 2**0 CONTENTS, READONLY I'm able to see uart_base in vmlinux objdump ... $ arm-linux-gnueabi-objdump -t arch/arm/boot/compressed/vmlinux [relevant only, and sorted] 00000000 l d .text 00000000 .text 001c474c l d .got 00000000 .got 001c4774 l d .got.plt 00000000 .got.plt 001c4780 l d .bss 00000000 .bss 003968e4 g *ABS* 00000000 _image_size 001c474c g *ABS* 00000000 _got_start 001c4774 g *ABS* 00000000 _got_end 001c4780 g *ABS* 00000000 _edata 001c4780 g *ABS* 00000000 __bss_start 001c4780 l O .bss 00000004 uart_base 001c4798 g O .bss 00000004 malloc_ptr 001c478c g O .bss 00000004 output_ptr 001c479c g O .bss 00000004 malloc_count 001c4794 g O .bss 00000004 free_mem_end_ptr 001c4788 g O .bss 00000004 output_data 001c4784 g O .bss 00000004 __machine_arch_type 001c4790 g O .bss 00000004 free_mem_ptr 001c47a0 g *ABS* 00000000 _end ... but I can not see it in the zImage (all others in .bss seem still there). $ xxd arch/arm/boot/zImage | tail 01c4740: 3ef1 1400 be52 9f58 e468 3900 4c47 1c00 >....R.X.h9.LG.. ^_got_start (why is it?) 01c4750: 9847 1c00 1043 0000 8c47 1c00 9c47 1c00 .G...C...G...G.. ^malloc_ptr ^output_ptr 01c4760: 9447 1c00 080a 0000 8847 1c00 8447 1c00 .G.......G...G.. ^free_mem_end_ptr ^__machine_arch_type 01c4770: 9047 1c00 0000 0000 0000 0000 0000 0000 .G.............. ^free_mem_ptr The following is a run-time memdump at _got_start. Before recalculation: 9056304C: 001C474C 001C4798 00004310 001C478C 001C479C 001C4794 00000A08 001C4788 ^_got_start (why is it?) 9056306C: 001C4784 001C4790 00000000 00000000 00000000 EDFE0DD0 4C010000 38000000 After recalculation (for .bss entries, the delta is 9039EA50, for others in .got, delta is 9039E900): 9056304C: 9056304C 905631E8 903A2C10 905631DC 905631EC 905631E4 9039F308 905631D8 9056306C: 905631D4 905631E0 00000000 00000000 00000000 73FBC000 4C010000 38000000 QUESTION: Where is the .bss section of uart_base? Now, I remove the 'static' to have 'unsigned long uart_base', and dump the same stuff to compare. $ arm-linux-gnueabi-objdump -D arch/arm/boot/compressed/misc.o Disassembly of section .bss: 00000000 <__machine_arch_type>: 0: 00000000 andeq r0, r0, r0 00000004 <uart_base>: 4: 00000000 andeq r0, r0, r0 I'm able to see uart_base in vmlinux objdump ... $ arm-linux-gnueabi-objdump -t arch/arm/boot/compressed/vmlinux [relevant only, and sorted] 00000000 l d .text 00000000 .text 001c4720 l d .got 00000000 .got 001c474c l d .got.plt 00000000 .got.plt 001c4758 l d .bss 00000000 .bss 003968e4 g *ABS* 00000000 _image_size 001c4720 g *ABS* 00000000 _got_start 001c474c g *ABS* 00000000 _got_end 001c4758 g *ABS* 00000000 _edata 001c4758 g *ABS* 00000000 __bss_start 001c475c g O .bss 00000004 uart_base 001c4770 g O .bss 00000004 malloc_ptr 001c4764 g O .bss 00000004 output_ptr 001c4774 g O .bss 00000004 malloc_count 001c476c g O .bss 00000004 free_mem_end_ptr 001c4760 g O .bss 00000004 output_data 001c4758 g O .bss 00000004 __machine_arch_type 001c4768 g O .bss 00000004 free_mem_ptr 001c4778 g *ABS* 00000000 _end ... and I can also see it in the final zImage. $ xxd arch/arm/boot/zImage | tail 01c4710: 221f f1b3 3ef1 1400 be52 9f58 e468 3900 "...>....R.X.h9. 01c4720: 5c47 1c00 2047 1c00 7047 1c00 e442 0000 \G.. G..pG...B.. ^uart_base 01c4730: 6447 1c00 7447 1c00 6c47 1c00 140a 0000 dG..tG..lG...... 01c4740: 6047 1c00 5847 1c00 6847 1c00 0000 0000 `G..XG..hG...... 01c4750: 0000 0000 0000 0000 ........ Surely, it's in the run-time memdump. Before recalculation: 90563020: 001C475C 001C4720 001C4770 000042E4 001C4764 001C4774 001C476C 00000A14 ^uart_base 90563040: 001C4760 001C4758 001C4768 00000000 00000000 00000000 EDFE0DD0 4C010000 After recalculation: 90563020: 905631AC 90563020 905631C0 903A2BE4 905631B4 905631C4 905631BC 9039F314 90563040: 905631B0 905631A8 905631B8 00000000 00000000 00000000 EDFE0DD0 4C010000 So it looks the non-static ('g') uninitialized variable sits in .bss sections well, while static ('l') one is not there. Is this expected? How the static one is being addressed? Or ask where the offset for static one is stored? Any info or comments are appreciated. -- Regards, Shawn

14 years, 2 months

3
9
0 0

[0/5] Improvements to vldN and vstN intrinsics

by Richard Sandiford

I've just submitted a merge request for the vldN and vstN intrinsic improvements. There are five related patches, so I thought it might be easier to review the merge if I posted the individual changes here. See: http://www.mail-archive.com/linaro-toolchain@lists.linaro.org/msg00969.html for an example of how this helps. Richard

14 years, 2 months

1
5
0 0

Test log comparison

by Michael Hope

I've fixed up the testcompare pages on ex.seabright.co.nz. It was getting confused by parallel testsuite runs and couldn't handle the results jumping about. I've also added a filter to buildlog that does a prefix match. Going to: http://ex.seabright.co.nz/helpers/buildlog/gcc-linaro shows just gcc-linaro results and: http://ex.seabright.co.nz/helpers/buildlog/gcc-linaro-4.5 for just 4.5 results. The bzr build results are looking good so far: armv7: http://ex.seabright.co.nz/helpers/testcompare/gcc-linaro-4.5+bzr99498/logs/… No changes except PCH. 99499 is still building. i686: http://ex.seabright.co.nz/helpers/testcompare/gcc-linaro-4.5+bzr99499/logs/… No changes. Note that the guality failures happen in 4.5.2 as well x86_64: http://ex.seabright.co.nz/helpers/testcompare/gcc-linaro-4.5+bzr99499/logs/… No changes. 4.6 related: x86_64: http://ex.seabright.co.nz/helpers/testcompare/gcc-linaro-4.6+bzr106734/logs… i686: http://ex.seabright.co.nz/helpers/testcompare/gcc-linaro-4.6+bzr106734/logs… armv7 is still building. -- Michael

14 years, 2 months

1
0
0 0

smc #0 unsuppored (bug 669912) gcc-4.5 linux-2.6.38

by AJ ONeal

I just did `git checkout` for linaro/linux-2.6.38 and tried compiling with CROSS_COMPILE=arm-linux-gnueabi- and I get this smc #0 error. The bug filed here is marked as fixed, but it's still broken for me: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/669912 I ran into this error once before, but I can't find my notes for it. I think the solution was to append something like $(sec) on a line in the Makefile. Any ideas? AJ ONeal

14 years, 2 months

3
2
0 0

Changing how we make changes

by Michael Hope

Hi there. I'd like to change and clarify how we make changes inside Linaro toolchain projects. The write-up is here: https://wiki.linaro.org/WorkingGroups/ToolChain/MakingChanges The short story is that now, just like mainline, the developers themselves do the final commit or merge into bzr. I've volunteered three of you on a review roster so that someone has the responsibility for reviewing patches each week. The roster is: * Ramana week 15, 17, 20, ... starting the 11th of April 2011 * Richard week 16, 18, 21, ... starting the 18th of April 2011 * Ulrich week 17, 19, 22, ... starting the 25th of April 2011 Anyone is welcome to review patches. The more eyes the better. Thoughts? -- Michael

14 years, 2 months

2
2
0 0

What is __aeabi_unwind_cpp_pr0?

by AJ ONeal

I'm just curious as to what "__aeabi_unwind_cpp_pr0" is or means. I can't find any explanation by googling. I'm about to post a separate e-mail with my problem concerning it. AJ ONeal

14 years, 2 months

1
0
0 0

[ACTIVITY] 11th -15th April

by Andrew Stubbs

Reviewed and approved Revital's do-loop patch, and Ira's store sinking patch. More precisely, I reviewed the test results from Michael's test system, and cast my eye over the patch to look for anything obvious. I don't pretend to know exactly what they do. Attended Ramana's thumb2 optimization discussion. Continued work on merging useful patches from CodeSourcery. Pushed the new patch set to Launchpad for testing in Michael's system. Pointed Bernd at lp:758082 - another probable shrink-wrap failure. Bernd responded with a new patch, and asked me to test it. I've pushed it to Launchpad and created a merge request. Posted an old patch of Dan's upstream: http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg03144.html Pinged my thumb2 constants patch upstream. Richard E responded with some issues to address. I'll need to change the names of the constraints, at least. At Ramana's request, tested the NEON scheduling patch with SPEC2000. Encountered trouble with time-outs. Fixed those and retested. Posted an updated version of my EABI half-precision patch: http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg03210.html Merged my backport of Julian's -fstrict-volatile-bitfields bug fix into Linaro GCC. The testing of the Android patches came back with a few test differences, but they appear to be unrelated to the patch, so are probably environmental. I've merged the changes to Linaro GCC. [Also spent most of Friday working on internal CS tasks.] ---- Upstream patched requiring review: * NEON scheduling patch http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01431.html * NEON test cases http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg03144.html * ARM EABI half-precision functions (reposted) http://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg03210.html

14 years, 2 months

1
0
0 0

[ACTIVITY] Apr.11 -- 17

by Chung-Lin Tang

== Last week == * CoreMark regressions: pushed a merge of my two upstream patches to Linaro 4.5, some current numbers are here: http://lists.linaro.org/pipermail/linaro-toolchain/2011-April/001087.html. * Continued working on another combine patch for improving CoreMark, hopefully ready to submit this week. * Committed fix for PR48325 (NEON POST_INC/PRE_DEC load/stores for struct modes) upstream. * Committed fix for PR48250 / Launchpad #723185 upstream. * Launchpad #689887, ICE in get_arm_condition_code(). My prior patch was tested to cause native bootstrap failure on Linaro 4.5, though retesting on upstream trunk worked fine. Still investigating. * Booked travel for Linaro-Budapest event. == This week == * Current combine patch. * Some unresolved patches, like PR46888. * Launchpad #689887, hope to figure this out.

14 years, 2 months

1
0
0 0

First session ideas for the summit

by Michael Hope

I've started up a page with ideas for sessions at next month's summit: https://wiki.linaro.org/MichaelHope/Sandbox/1111Blueprints They're a pretty direct map to the TSC technical topics so far which is nice to see. Feel free to add other ideas to the page. Each session is around 45 minutes, needs to be fairly well understood by the drafter beforehand, and should have concrete actions coming out of it. It's fine to have a few future/blue sky sessions but not too many. We'll discuss these at tonights meeting and assign drafters. -- Michael

14 years, 2 months

1
0
0 0

Some initial notes on the effects of vldN and vstN vectorisation

by Richard Sandiford

I've now submitted the initial vldN and vstN work, so I thought I'd see how often it triggers for natty's libav package. I've put some initial results here: https://wiki.linaro.org/RichardSandiford/Sandbox/NeonLibAv There are more files to go through, so this isn't complete. I've also left out cases that were very similar to the ones given. Some of the code is reasonable, while others are obviously not as good as they could be. I don't think the problems are really to do with the vldN and vstN work itself though. They seem to be due to the underlying interleaved load/store detection, or in the handling of widening operations. Richard

14 years, 2 months

2
1
0 0

[ACTIVITY] 2011-04-15

by David Gilbert

== Bug triaging == * Bug 745843 (vtk ftbfs) got it down to a bad arm/thumb transition - identified as a linker error and handed off to RichardS * Bug 758082 (augeas ftbfs) tracked it down to overwrite of a parameter in a variadic function before it got stacked; identified by Ramana as another instance of the shrink-wrap bug. * Bug 745861 (petsc ftbfs) isolated the collection of different mpi related problems this is hitting; really need to find an mpi expert on this * Bug 745863 & bug 745891 (ftbfs's) - both were compilations that timed out; verified this was due to using lots of RAM and also using lots of RAM on x86 (> ~500MB) - marked as invalid until the build farm grows more RAM * Bug 757427 gconf seg fault - failed to reproduce under various tests (although Michael has now managed to catch it in the act) == Optimisation == * neon memcpy tweeking; added prefetches and unrolled the core loop - now comparable perf to bionic memcpy in most cases (slower on misaligned destination, faster in other cases) * tweaked latrace to print address/length of argument strings so I can get some stats on routine usage. Dave

14 years, 2 months

1
0
0 0

[ACTIVITY] Weekly status

by Richard Sandiford

== This week == * Worked on a fix for https://bugs.launchpad.net/gcc-linaro/+bug/758082 Submitted the patch upstream. * Finished first cut of vldN and vstN vectorisation. Send the patches upstream. Most of the patches have been approved, but I'll wait for the others before committing. * Looked at how the vectoriser handles natty's libav. Found some nice loops, some OK-but-could-do-better, and some really atrocious. Wrote up the results here: https://wiki.linaro.org/RichardSandiford/Sandbox/NeonLibAv * Started writing micro benchmarks for each loop on that page. I'm about half way through now (starting from the bottom). * Started looking at whether the changes affect DENbench. * Patch review. * Wrote a small follow-up to the fix for LP 758082. * Some patch pinging. == Next week == * More micro benchmarks. * More DENbench. * Submit a merge request for the intrinsics improvements, if the remaining patches are approved. * Look at the poorer libav loops in more detail. Richard

14 years, 2 months

1
0
0 0

[ACTIVITY] report week 15

by Peter Maydell

RAG: Red: Amber: Green: now only 6 "core ARM emulation" patches in qemu-linaro not yet upstreamed (still lots of omap3 patches, though) Current Milestones: | Planned | Estimate | Actual | qemu-linaro 2011-04 | 2011-04-21 | 2011-04-21 | | Historical Milestones: finish qemu-cont-integration | 2011-01-25 | 2011-01-25 | handed off | first qemu-linaro release | 2011-02-08 | 2011-02-08 | 2011-02-08 | qemu-linaro 2011-03 | 2011-03-08 | 2011-03-08 | 2011-03-08 | == maintain-beagle-models == * some early prep for next week's qemu-linaro release == merge-correctness-fixes == * patch to fix Neon UNDEFs sent upstream and committed * patch fixing an overflow in signed VABAL.s32 upstreamed, committed * investigated a bug report which turns out to be that if you try to single step over an instruction which UNDEFs using qemu's gdb stub we execute the insn at the UNDEF vector and stop after it rather than stopping at the UNDEF vector * some investigation of qemu mishandling of FP exception flag setting; putting this on hold though, as it really isn't very high priority * reviewed patches from Aurelien doing some general softfloat cleanup == other == * trying to nail down proposed QEMU work for next cycle; work-in-progress: https://wiki.linaro.org/PeterMaydell/Qemu1111 * two IRC interviews for QEMU Google Summer of Code student to do some work on upstreaming of the Android emulator device models * meetings: toolchain, standup, architecture Q&A, divisional update Current qemu patch status is tracked here: https://wiki.linaro.org/PeterMaydell/QemuPatchStatus Absences: Holiday: 22 Apr - 2 May 9-13 May: UDS, Budapest (maybe) 15-16 August: QEMU/KVM strand at LinuxCon NA, Vancouver [LinuxCon proper follows on 17-19th]

14 years, 2 months

1
0
0 0

CoreMark Status

by Chung-Lin Tang

Hi, I've just pushed a merge of the current upstream patches for resolving the CoreMark regressions. (https://code.launchpad.net/~cltang/gcc-linaro/coremark-part1) To give a quick benchmark of the current status, testing Linaro 4.5 before/after the merge of those two patches: Optimization options used were just plain '-O2 -mtune=cortex-a9', tested on one of our Pandaboards running Maverick; all numbers are Iterations/Sec averaged from 3 runs. r99492 r9942+patches improve % -march=armv5te 2786.87 2848.12 2.20 % -march=armv7-a 2474.50 2775.92 12.18 % -march=armv7-a -mthumb 2297.86 2356.59 2.56 % I'll have to re-test to be sure, but the numbers/improvements obtained using upstream trunk should not be too far off, at least the ARM mode ones. As we discussed in prior meetings, there's still one point of regression identified that's in solving, which hopefully will finally bring the ARMv7-A numbers above ARMv5TE. Chung-Lin

14 years, 2 months

2
1
0 0

[Activity] 10th - 14th April

by Revital Eres

Hello, - Tracking down bugs exposed while testing a patch for SMS to avoid using -fauto-inc-dec flag and preparing fixes for them. Also, prepared a fix for PR47013. - Continue looking into DENbench and updating https://wiki.linaro.org/Internal/ToolChain/Benchmarks. Thanks, Revital

14 years, 2 months

1
0
0 0

[Activity] 11th - 14th April

by Ramana Radhakrishnan

== GCC == Progress: * Spent some time digging into binutils issue for Neon but still not sure why I see the problem when this is fixed in 2.21 branch and no one else see this. * Fixed PR 48090 upstream. * Some patch review. * T2 performance meeting. Plans when I'm back: * Continue looking at divmodsi4 improvements. * Continue looking at excessive VFP moves. * Backport the fix for the initialization of cgraph into FSF 4.5 branch. Meetings: * 1-1s * Linaro toolchain meeting * T2 performance. * Linaro@UDS meeting. Absences: * April 15 – 26 -> Booked. * May 9-14 - LDS Budapest

14 years, 2 months

1
0
0 0

Issue with noreturn static function with unused arg

by Loïc Minier

hey This problem with busybox: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=621137 seems to be a toolchain issue. It occurs with FSF GCC 4.5.2 but not 4.6, and it doesn't occur with Linaro GCC 4.5 but it does with Debian gcc-4.5. I'm trying to identify the fix which Linaro applied to solve this! :-) Michael Hope told me he remembers we fixed something similar for Qt, but he couldn't find the patch and suggested I post here to get feedback. I've pushed ash.i and .s at: http://people.linaro.org/~lool/ash.i which you can build with: gcc -save-temps -std=gnu99 -Wall -Wshadow -Wwrite-strings -Wundef -Wstrict-prototypes -Wunused -Wunused-parameter -Wunused-function -Wunused-value -Wmissing-prototypes -Wmissing-declarations -Wdeclaration-after-statement -Wold-style-definition -fno-builtin-strlen -finline-limit=0 -fomit-frame-pointer -ffunction-sections -fdata-sections -fno-guess-branch-probability -funsigned-char -static-libgcc -falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1 -g -Os -c -o ash2.o ash.i the interesting part is that ash.s has tryexec as not returning, when it does return: grep ^tryexec ash.s -A5 | grep return this seems to be due to the combination of tryexec being static, its parent being noreturn, and one argument of tryexec being unused. Any idea of which Linaro patch solved this? :-) Does it make sense to raise this to FSF GCC 4.5? Thanks! -- Loïc Minier

14 years, 2 months

2
4
0 0

First toolchain estimate for the next cycle

by Michael Hope

Hi there. Mounir and I have been looking at the work for next cycle. A summary spreadsheet with notes is available here: https://spreadsheets0.google.com/ccc?key=ty1c-H56f0GxnL1Hk9LCmRg I'm very interested in feedback, especially on the time estimates and extra topics we should suggest to the TSC. See the notes at the top and feel free to add items or estimates straight into the sheet - anyone can view and anyone at Linaro should be able to edit. -- Michael

14 years, 2 months

2
2
0 0

Differences in build hosts

by Michael Hope

Hi there. I ran a build of gcc-linaro-4.5+bzr99491 on ursa1 through 4 to see if there was any difference in build machines. The following tests had different results: * gcc.c-torture/compile/limits-structnest.c * gcc.dg/graphite/block-4.c * largefile.c * obj-c++.dg/template-5.mm * obj-c++.dg/template-5.mm * obj-c++.dg/template-6.mm * obj-c++.dg/template-6.mm * objc/execute/class-4.m I suspect that they're all caused by running the testsuite in parallel and the host running out of memory. limits-structnest takes around 850 MB of RAM and passes on the machine with swap (ursa1) and fails on the others. block-4.c takes 2:35 to run and timed out on ursa1 and passed on the others which may be due to ursa1 swapping heavily while running a limit test in parallel. The obj-c tests show various forms of killed, and suggest that they were killed due to another process taking all the memory. I'll change the machines to use the full 1 G of memory, run the test suite in sequential mode, and see how things go. I haven't investigated largefile.c - it's a PCH test and these fail randomly. Regarding block-4.c, it takes 155 s to run which is too close to the default 300 s for my taste. Should we add a dg-timeout-factor 4.0 to it similar to block-3.c? -- Michael

14 years, 2 months

1
1
0 0

[Activity] April 4th - 8th

by Ramana Radhakrishnan

Missed sending this out earlier this week. == GCC == Progress: * Sync'd with Andrew about T2 performance stuff. * Spent some time investigating what could be done for divmodsi4 improvements . Working through the various phases. Not done tree level stuff for a while so my knowledge of the API is a a bit rusty. * Some upstream bugzilla duty. Plans: * Continue looking at divmodsi4 improvements. * Continue looking at excessive VFP moves. * Look at binutils + neon issue. * Performance kick-off meeting Meetings: * 1-1s * Linaro toolchain meeting * Andrew Stubbs meeting for 1 hour about T2 performance. Absences: * April 13th - Internal ARM conference. Not at desk all day. * April 15 – 26 -> Booked. * May 9-14 - LDS Budapest

14 years, 2 months

1
0
0 0

[ACTIVITY] weekly status

by Ken Werner

Hi, libunwind: * started to look on how to resume from a given stack frame: * other platforms use setcontext * setcontext is not implemented on ARM (glibc) * the *context functions have been marked obsolescent in Posix * http://pubs.opengroup.org/onlinepubs/009695399/functions/makecontext.html pandaboard: * gdb doesn't find separate debug info of libraries that have been put into a multiarch directory (#758619) Note: I'll be out of office to attend a class till (including) Friday. Regards Ken

14 years, 2 months

1
0
0 0

Today's T2 perf call.

by Ramana Radhakrishnan

A rough agenda for today's call. I'll put this on the wiki after the call. 1. Go over what we are all doing today - roughly Areas of investigation that we are looking at for near term. a. divmodsi4 work. b. Unnecessary VFP to integer register moves because of addressing modes availability. c. Thumb2 constants work d. Additional areas for headroom in DENBENCH. e. Coremark regressions fix up f. Revisions causing major regressions in coremark 2. Find a way of replicating the benchmarking results and make sure we get similar results to Michael and we are doing roughly the same thing. 3. Regular bi-weekly call following the Toolchain WG meeting ? Or do we organize another call ?

14 years, 2 months

2
1
0 0

[Bug 758082] [NEW] [armel] segfaults in make check pass when built with optimization

by Jani Monoses

Public bug reported: FTBFS on armel https://launchpadlibrarian.net/68239668/buildlog_ubuntu-natty-armel.augeas_… not apparent from the log but the failing of test-interpreter.sh is due to a core dump. Starting program: /home/jani/work/ftbfs/aug/augeas-0.8.0/src/.libs/lt- augparse --nostdinc -I . fail_let_no_exp.aug Program received signal SIGSEGV, Segmentation fault. strlen () at ../ports/sysdeps/arm/strlen.S:29 29 ../ports/sysdeps/arm/strlen.S: No such file or directory. in ../ports/sysdeps/arm/strlen.S (gdb) bt #0 strlen () at ../ports/sysdeps/arm/strlen.S:29 #1 0x4016c050 in _IO_vfprintf_internal (s=<value optimized out>, format=<value optimized out>, ap=<value optimized out>) at vfprintf.c:1620 #2 0x401d7b66 in __vasprintf_chk (result_ptr=0xbee5097c, flags=1, format=0x400d961c "%s", args=...) at vasprintf_chk.c:68 #3 0x400bfad6 in vasprintf (info=<value optimized out>, code=<value optimized out>, format=0x400d961c "%s", ap=...) at /usr/include/bits/stdio2.h:199 #4 format_error (info=<value optimized out>, code=<value optimized out>, format=0x400d961c "%s", ap=...) at syntax.c:96 #5 0x400bfd98 in syntax_error (info=0x1, format=0x400d961c "%s") at syntax.c:124 #6 0x400c3e96 in augl_error (locp=<value optimized out>, term=<value optimized out>, scanner=<value optimized out>, s=0x400d7abc "syntax error") at parser.y:628 #7 0x400c54f8 in augl_parse_file (aug=0x1ef1878, name=<value optimized out>, term=0xbee50a64) at parser.y:362 #8 0x400c153a in load_module_file (aug=0x1ef1878, filename=0xbee50ddb "fail_let_no_exp.aug") at syntax.c:1951 #9 0x400bbf0a in __aug_load_module_file (aug=0x1ef1878, filename=0xbee50ddb "fail_let_no_exp.aug") at augeas.c:1447 #10 0x00008b04 in main (argc=<value optimized out>, argv=0xbee50c84) at augparse.c:131 ** Affects: gcc-linaro Importance: Undecided Status: New ** Affects: augeas (Ubuntu) Importance: Undecided Status: New ** Tags: arm-porting-queue ** Also affects: gcc-linaro Importance: Undecided Status: New ** Summary changed: - segfaults in make check pass when built with optimization + [armel] segfaults in make check pass when built with optimization ** Tags added: arm-porting-queue -- You received this bug notification because you are a member of Linaro Toolchain Developers, which is subscribed to Linaro GCC. https://bugs.launchpad.net/bugs/758082 Title: [armel] segfaults in make check pass when built with optimization Status in Linaro GCC: New Status in “augeas” package in Ubuntu: New Bug description: FTBFS on armel https://launchpadlibrarian.net/68239668/buildlog_ubuntu-natty-armel.augeas_… not apparent from the log but the failing of test-interpreter.sh is due to a core dump. Starting program: /home/jani/work/ftbfs/aug/augeas-0.8.0/src/.libs/lt- augparse --nostdinc -I . fail_let_no_exp.aug Program received signal SIGSEGV, Segmentation fault. strlen () at ../ports/sysdeps/arm/strlen.S:29 29 ../ports/sysdeps/arm/strlen.S: No such file or directory. in ../ports/sysdeps/arm/strlen.S (gdb) bt #0 strlen () at ../ports/sysdeps/arm/strlen.S:29 #1 0x4016c050 in _IO_vfprintf_internal (s=<value optimized out>, format=<value optimized out>, ap=<value optimized out>) at vfprintf.c:1620 #2 0x401d7b66 in __vasprintf_chk (result_ptr=0xbee5097c, flags=1, format=0x400d961c "%s", args=...) at vasprintf_chk.c:68 #3 0x400bfad6 in vasprintf (info=<value optimized out>, code=<value optimized out>, format=0x400d961c "%s", ap=...) at /usr/include/bits/stdio2.h:199 #4 format_error (info=<value optimized out>, code=<value optimized out>, format=0x400d961c "%s", ap=...) at syntax.c:96 #5 0x400bfd98 in syntax_error (info=0x1, format=0x400d961c "%s") at syntax.c:124 #6 0x400c3e96 in augl_error (locp=<value optimized out>, term=<value optimized out>, scanner=<value optimized out>, s=0x400d7abc "syntax error") at parser.y:628 #7 0x400c54f8 in augl_parse_file (aug=0x1ef1878, name=<value optimized out>, term=0xbee50a64) at parser.y:362 #8 0x400c153a in load_module_file (aug=0x1ef1878, filename=0xbee50ddb "fail_let_no_exp.aug") at syntax.c:1951 #9 0x400bbf0a in __aug_load_module_file (aug=0x1ef1878, filename=0xbee50ddb "fail_let_no_exp.aug") at augeas.c:1447 #10 0x00008b04 in main (argc=<value optimized out>, argv=0xbee50c84) at augparse.c:131

14 years, 2 months

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Conference code for today's Thumb-2 kick off call

by Michael Hope

Hi everyone. The conference code for today's call is 5238686884. The dial in numbers are the same as the weekly meeting. See: http://wiki.linaro.org/WorkingGroups/ToolChain/Meetings -- Michael

14 years, 2 months

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[Bug 757427] [NEW] gconftool-2 segfaults on arm

by Jani Monoses

Public bug reported: The 2.32.2 upload of gconf is likely miscompiled and segfaults. This leads to other armel FTBFSs in the archive when calling gconftool-2 as part of the install phase. ** Affects: gcc-linaro Importance: Undecided Status: New ** Affects: gconf (Ubuntu) Importance: Undecided Status: New ** Tags: arm-porting-queue ** Package changed: ubuntu => gconf (Ubuntu) ** Also affects: gcc-linaro Importance: Undecided Status: New -- You received this bug notification because you are a member of Linaro Toolchain Developers, which is subscribed to Linaro GCC. https://bugs.launchpad.net/bugs/757427 Title: gconftool-2 segfaults on arm Status in Linaro GCC: New Status in “gconf” package in Ubuntu: New Bug description: The 2.32.2 upload of gconf is likely miscompiled and segfaults. This leads to other armel FTBFSs in the archive when calling gconftool-2 as part of the install phase.

14 years, 2 months

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[ACTIVITY] Weekly status

by Richard Sandiford

== Last week == * Sent a fix for PR target/46329 upstream. * Discussed with Richard Guenther how to represent the interleaved load/store "functions" that we're adding to gimple. Sent a patch upstream for comments. Richard confirmed on IRC that he was happy with it, and no-one else has objected. * Spent most of the week on the vectorisation itself, and on the testsuite. == This week == * Finish work on vectorisation testsuite and submit. Richard

14 years, 2 months

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[ACTIVITY] Apr.04 -- Apr.10

by Chung-Lin Tang

== Last week == * Mon/Tue (Apr.4--5): Tomb-sweeping Day, public holiday. * PR48250 / CS Issue #9845 / Launchpad #723185. Unaligned DImode reload under NEON. Worked on new patch, submitted to gcc-patches after testing on Friday. Awaiting review. == This week == * CoreMark ARMv6/v7 regressions: working on new combine patch.

14 years, 2 months

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[ACTIVITY] 4th - 9th April

by Andrew Stubbs

The test results for the patch for lp:675347 on GCC 4.6 came back clean, so I merged it to Linaro GCC 4.6. The test results for lp:675347 on 4.5 had problems though, but they might be unrelated to the patch. The test results for the "discourage NEON on A8" patch had similar failures, and that's a 4.6 testsuite. Richard Earnshaw approved the Thumb register allocation patch. I've committed it upstream, and updated the patch trackers. It was already on the Linaro 4.6 branch. Now that GCC 4.6 is released, switched all the Linaro tracking tickets from 'Fix committed' to 'Fix released'. Merged from FSF 4.5 to Linaro 4.5 and submitted the patch for test. The tests came back clean, so I pushed it to the 4.5 branch. (Yay for Michael's new test service!) Merged more patches from SG++ to Linaro. Or, at least considered them for merge. Mostly I decided that they were not appropriate for Linaro, at least, not just yet. I have yet to push these patches to Launchpad. Reviewed Richard Sandiford's patch for LP:714921. Retried the Android build with a view to integrating Android support in Linaro GCC 4.5 (4.6 should already support it). Eventually, after downloading many different git repositories and branches, and maxing out the memory on my machine a few times, I managed a successful build using the toolchain the Android team are using. I then backported Maxim's patches to Linaro GCC 4.5, and built and tested that, and got another successful Android build. I've pushed the patched toolchain to Launchpad at lp:~ams-codesourcery/gcc-linaro/android for testing. All being well, I'll merge Android support into the 4.5 trunk in time for the next release. ---- Upstream patched requiring review: * Thumb2 constants: http://gcc.gnu.org/ml/gcc-patches/2010-12/msg00652.html * ARM EABI half-precision functions http://gcc.gnu.org/ml/gcc-patches/2011-02/msg00874.html * NEON scheduling patch http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01431.html

14 years, 2 months

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[ACTIVITY] 2011-04-08

by David Gilbert

- Back from holiday, short week. == Porting jam == * We seem to have picked up a lot of ftbfs in the last couple of weeks - which is unfortunate because it may well be too close to the Natty release to do anything about them * Bug 745843 is a repeatable segfault in part of the build process of a package called vtk that is used by a few other things ; I've got this down to a particular call of one function - although gdb is getting rather confused (r0 & r1 changing as I single step across a branch) * Bug 745861 petsc build failure; I'm getting one of two different link errors depending which mood it is in - mpi related? * Bug 745873 - a meta package that just didn't have a list of packages to build with for armel; easy to do a simple fix (provided branch that built) for but the maintainer says it's too late for natty anyway and some more thought is needed. == Other == * Reading over some optimisation documents * Tested weekly release on Beagle-c4 (still no OTG usb and hence no networking for me) * Also simple boot test on panda; not much time for more thorough test. (seems to work) Dave

14 years, 2 months

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[ACTIVITY] weekly status

by Ken Werner

Hi, == libunwind == * created a generic and local variant of the extbl parser * continued to look into testsuite failures * down to 12 failures: https://wiki.linaro.org/KenWerner/Sandbox/libunwind * continue to post patches upsteam Note: I'll be out of office to attend a class starting from Wednesday till Friday next week. Regards Ken

14 years, 2 months

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[ACTIVITY] report week 14

by Peter Maydell

RAG: Red: Amber: Green: Current Milestones: | Planned | Estimate | Actual | qemu-linaro 2011-04 | 2011-04-21 | 2011-04-21 | | Historical Milestones: finish qemu-cont-integration | 2011-01-25 | 2011-01-25 | handed off | first qemu-linaro release | 2011-02-08 | 2011-02-08 | 2011-02-08 | qemu-linaro 2011-03 | 2011-03-08 | 2011-03-08 | 2011-03-08 | == maintain-beagle-models == * I spent a couple of days on initial cleanup of the omap3 patchstack in qemu-linaro. It's still some way from being upstreamable but at least now every patch in the stack compiles; this should make rebasing on upstream a bit less painful. * the board-ram-limits patchset is still stalled with upstream :-( == merge-correctness-fixes == * Aurelien applied lots of patches so the pipeline has drained again * cleaning up/reworking patches which fix handling of Neon UNDEF cases. Not very exciting but it will get a large set of patches out of the qemu-linaro patchstack. == other == * meetings: toolchain, standup Current qemu patch status is tracked here: https://wiki.linaro.org/PeterMaydell/QemuPatchStatus Absences: Holiday: 22 Apr - 2 May 9-13 May: UDS, Budapest (maybe) 15-16 August: QEMU/KVM strand at LinuxCon NA, Vancouver [LinuxCon proper follows on 17-19th]

14 years, 2 months

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[Merge] lp:~rsandifo/gcc-linaro/lp-714921-4.5 into lp:gcc-linaro

by noreply＠launchpad.net

The proposal to merge lp:~rsandifo/gcc-linaro/lp-714921-4.5 into lp:gcc-linaro has been updated. Status: Needs review => Merged For more details, see: https://code.launchpad.net/~rsandifo/gcc-linaro/lp-714921-4.5/+merge/56525 -- https://code.launchpad.net/~rsandifo/gcc-linaro/lp-714921-4.5/+merge/56525 Your team Linaro Toolchain Developers is subscribed to branch lp:gcc-linaro.

14 years, 2 months

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Launchpad: Validate your team's contact email address

by Launchpad Email Validator

Hello The Launchpad user named 'Michael Hope (michaelh1)' requested the registration of 'linaro-toolchain(a)lists.linaro.org' as the contact email address of team 'Linaro Toolchain Developers'. This request can only be made by a team owner/administrator, so if this change request was unexpected or was not requested by one of the team's administrators, please contact system-error(a)launchpad.net. If you want to make this email address the contact email of 'Linaro Toolchain Developers', please click on the link below and follow the instructions. https://launchpad.net/token/6sQQKQ6kx3XP9MlWMwmX Thanks, The Launchpad Team

14 years, 2 months

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New porter boxes

by Michael Hope

Hi there. The new porter boxes are now available for use. See: https://wiki.linaro.org/WorkingGroups/ToolChain/Hardware for details. These are PandaBoards with 768 MB of memory, a USB HDD, and a good internet connection. They can be used for day to day jobs like building programs, triaging bugs, and running benchmarks. Use dchroot natty to switch into the chroot. Use sudo apt-get install yyy to install packages. The build dependences for GCC, GDB, and binutils should already be installed. -- Michael

14 years, 2 months

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[ACTIVITY] April 3-7

by Ira Rosen

Hi, * continued bringing patches upstream - changing default vector size to 128 - resubmitted with changes according to comments, awaiting review - if-conversion improvement - committed * PR 48252 - bug in vzip/vuzp/vtrn implementation - patch submitted * opened PR 48454 - a test failure with -mvectorize-with-neon-quad Next week - vacation. April 18-27 - Passover Holiday, I'll only work half days on April 18 and April 24. And possibly half days on April 20 and 21. Ira

14 years, 2 months

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Tegra2 errata bug

by David Gilbert

https://bugs.launchpad.net/ubuntu/+source/eglibc/+bug/739374 is the bug relating to the Tegra errata mentioned today. Dave

14 years, 2 months

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