linaro-toolchain

linaro-toolchain@lists.linaro.org

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5486 discussions

by Revital Eres

* libauqntum - running the SMSed version on ARM machine did not show significant improvement. Discussed it with Richard Sandiford. Apparently in the SMS phase the instructions are of DI mode due to the fact the loop contains 64 bit operations while they later been generated as 32 bit operations. This makes SMS less accurate and I'm now looking into a version which disables DI mode operations. * Started to look at the potential of SMS on libav. Initial runs of Richard's microbenchmarks with SMS show some regressions as well as improvements that I'm looking at.

13 years, 3 months

Standard GCC configurations

by Michael Hope

Hi there. I've written up the standard configurations that we use to build and test Linaro GCC: https://wiki.linaro.org/WorkingGroups/ToolChain/Configurations/GCC It includes such things as flags, libraries, and sysroots. You might find it useful to see what we're testing or, if new to compilers, what a good starting point is. -- Michael

13 years, 3 months

[ACTIVITY] 2011-08-12

by David Gilbert

== QEMU == * Finished off a first cut of the 64bit helper patch to QEMU - Gave it to Peter and have reworked most of the things he commented on * This also lead into a bit of a rabbit hole of finding various generic QEMU threading issues * Tested Peter's 11.08 QEMU release (I used linaro-fetch-image-ui for the first time to grab the release images; quite nice, hit a couple of issues but much nicer than crawling around the site to find where the hwpacks are). == Other == * Pinged gcc patches list for more comments on 64bit atomic patch I'm on holiday the week of 22nd (i.e. the week after next). Dave

13 years, 3 months

[ACTIVITY] Aug 8 - Aug 12

by Ulrich Weigand

== GDB == * Re-tested Linaro GDB 7.3 on Versatile Express (native & remote testing). * Committed patch to re-enable remote thread test cases (#804401) to mainline and Linaro GDB 7.3. * Reviewed Yao's latest Thumb-2 displaced stepping patch. == GCC == * Patch review week. 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

13 years, 3 months

[ACTIVITY] report week 32

by Peter Maydell

RAG: Red: Amber: OMAP3 patch upstreaming is slower progress than hoped Green: Current Milestones: || || Planned || Estimate || Actual || ||qemu-linaro 2011-08 || 2011-08-18 || 2011-08-18 || || Historical Milestones: ||qemu-linaro 2011-04 || 2011-04-21 || 2011-04-21 || 2011-04-21 || ||qemu-linaro 2011-05 || 2011-05-19 || 2011-05-19 || n/a || ||close out 1105 blueprints || 2011-05-28 || 2011-05-28 || 2011-05-19 || ||complete 1111 planning || 2011-05-28 || 2011-05-28 || 2011-05-27 || ||qemu-linaro-2011-06 || 2011-06-16 || 2011-06-16 || 2011-06-16 || ||qemu-linaro-2011-07 || 2011-07-21 || 2011-07-21 || 2011-07-21 || == linaro-qemu-11.11 == * put together release candidate tarball for 2011.08 release, tested * added a workaround for omap kernel bug LP:727781 which had been fixed in 2.6.x but has resurfaced in 3.0 * tarball now ready and only needs releasing next week == 64-bit-sync-primitives == * reviewed David Gilbert's qemu patches to support 64 bit sync primitives == upstream-omap3-patches == * testing/reading Avi's memory API patches to see how they fit in or clash with the qdevification and other omap3 patches == other == * more investigation/thought about LP:823902 -- qemu bug running multithreaded programs in linux-user mode * Manned Linaro demo stand at ARM Partner Meeting (Tue, Wed) * Meetings: GSoC student x2, toolchain, toolchain standup, 1-2-1 Current qemu patch status is tracked here: https://wiki.linaro.org/PeterMaydell/QemuPatchStatus Absences: 15-19 August: KVM Forum and LinuxCon NA, Vancouver

13 years, 3 months

[Activity] Week ending 2011-08-12

by Ramana Radhakrishnan

== GCC == === Progress === * Linaro sprint last week - one day of fun with broken laptop. * Looked at how we could get BUILTIN_VECTORIZE_CONVERT work to allow vectorizing some of the floating point conversions. * Fixed PR50022 . Couple of iterations. * Internal training for 2 days. * Dusted off a couple of my old patches and sent them out after testing. * Next to get back to old VFP and ivopts patch. * Looked at a testfailure with -mvectorize-with-neon-quads with Ira . === Plans === * Continue to look at the test failure with mvectorize-with-neon-quad * Finish off optimize_size patch based on comments. * finish off case for handling tbh instrucitons. * Commit fix for PR50022 * Look at some of the issues with VFP moves and try and get forward with it. * Look at BRANCH_COST results. Meetings: * 1-1s * TCWG calls * GNU Toolchain planning meeting. * Some patch review and bugzilla triaging. Absences. * 1st Aug - 5th August - Linaro sprint. * 8th - 9th August - Internal training. * 29th Aug - Sept. 2 - Holiday booked and approved. * 31st Oct - 4th Nov - Linaro Summit Orlando - Travel to be booked.

13 years, 3 months

[ACTIVITY] Weekly status

by Richard Sandiford

== This week == * Looked a bug report that the fix for LP #736007 had caused regressions on powerpc-darwin. It turned out to be a target-specific bug; the backend has the same const_vector code as i386 and spu, but the fix for PR34856 was never applied there. I'll submit the patch (and backport to Linaro 4.6) once the bug submitter has had a chance to test it. * Experimented with -falign-loops. Found that it triggered a bug in the ARM minipool layout code. Posted patch upstream and committed. Backported to 4.6. * Committed patch to allow globs in define_bypass. * Updated auto inc/dec patch after comments from Bernd and Stephen. I'm pretty happy with it now, but there are a couple of prerequisite patches I need to sort out first. * Started getting those prerequisites ready. * Decided that we needed something a bit more subtle than my original insn_rtx_cost patch: at the moment, we simply don't use rtx costs for lvalues. Wrote a series of patches to "improve" the rtx_cost interface, including providing the outer operand number and an indication of whether the rtx is an lvalue or an rvalue. * Upgraded my laptop. This turnted out to be more eventful than anticipated, and ended up taking a whole day. == Next week == * Post auto inc/dec preparatory patches for review. Hopefully post an RFA for the pass itself. Richard

13 years, 3 months

[ACTIVITY] weekly status

by Ken Werner

Hi, * worked on getting the remote unwind support for ARM upstream * noticed when building a recent android image of the linaro_android_2.3.4 branch for the panda the init.rc attempts to mount wrong partitions * tracked down the commit and opened a bug * linaro android team fixed it real quick * started to integrate libunwind into Andriod * two issues here: - the build system requires an Android.mk (while libunwind is autoconf+libtool based) - libunwind uses some interfaces/headers that are not provided by the bionlic libc Regards Ken

13 years, 3 months

Re: What are the chances of a phone based developer image

by Christian Robottom Reis

On Thu, Aug 04, 2011 at 12:03:00PM -0700, Taras Glek wrote: > Recently we have been looking at how to squeeze more performance out > of our toolchain for building Firefox on Android. Mike Hommey > integrated GCC 4.6 into the android NDK and has been testing > performance (with mixed results > http://gcc.gnu.org/ml/gcc/2011-08/msg00096.html). You should definitely be trying to build using the Linaro 4.5 and 4.6 compiler branches; they are pretty much guaranteed to give you better performance, and if they don't, we're on the hook to fix it quickly! All the patches go upstream, so there is no risk of you being stuck on a fork -- it just makes everything you need available right now. I'm copying the linaro-toolchain list to make sure that you get the right people's attention (though if they weren't all coming back from Connect in Cambridge this week they would have picked the email up already). > I like how Linaro is doing regular arm benchmarking, ie > https://wiki.linaro.org/Platform/Android/AndroidToolchainBenchmarking/2011-… We do much more than that, but it's not as easy to find right now; for instance http://ex.seabright.co.nz/helpers/benchcompare is Michael's regular release benchmark. > . Would you be interested in adding a Firefox-based benchmark? As a > large application it is a good testbed for LTO, FDO and other > aggressive optimizations. Totally. Let's do it. Can you give me an idea of what boards you are testing the build on today? Do you have a test suite that we could run in a reasonable timeframe (hours, not days)? > We are also looking at setting a developer-friendly android ROM with > oprofile, perf, systemtap, gdb, debug symbols, etc. It might even be > beneficial for us to use newer kernels as we exlore options like > kernel-assisted ld.so relocations, etc. That seems to similar to > what Linaro provides in the evaluation ROMS. Is there any chance of > Linaro providing developer-friendly "evaluation" ROMs for retail > phones like the Nexus S? It's indeed pretty similar (we just call them LEBs), and Zach will be really interested in working with you on this. As for supporting actual released phones, it lies somewhat outside of our optimal operating model, and we don't have any hardware available. I guess we could do a spin for a specific model if we had enough of them to use by a set of engineers in the different teams. They are so expensive, though. Do you guys have lots of them? -- Christian Robottom Reis, Engineering VP Brazil (GMT-3) | [+55] 16 9112 6430 | [+1] 612 216 4935 Linaro.org: Open Source Software for ARM SoCs

13 years, 3 months

Change in Linaro Toolchain naming

by Michael Hope

Hi there. This is a heads-up that the name of the Toolchain group releases will change slightly with next weeks release. We're dropping the respin suffix (the -0) to line up with the new whole of Linaro naming convention. What was: gcc-linaro-4.6-2011.xx-0.tar.bz2 gdb-linaro-7.2-2011.xx-0.tar.bz2 qemu-linaro-0.15-2011.xx-0.tar.bz2 will now be: gcc-linaro-4.6-2011.xx.tar.bz2 gdb-linaro-7.2-2011.xx.tar.bz2 qemu-linaro-0.15-2011.xx.tar.bz2 Earth shattering, eh? I've taken the opportunity to write up our naming convention at the same time: https://wiki.linaro.org/WorkingGroups/ToolChain/Naming -- Michael

13 years, 3 months

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