linaro-toolchain

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5488 discussions

by Ulrich Weigand

== GDB == * Committed follow-on patch to fix cosmetic issues resulting from the remote "info proc" patch set. == GCC == * Created 4.6 backport branch including Richard's subreg forward- propagation branch, the modes-tieable patch, and the combine.c regression fix, and evaluated for correctness and performance. Investigation of performance regressions uncovered a problem in the register allocator: tied subregs (validly) cause somewhat larger register pressure in certain cases, and this caused the 4.6 IRA to generate spills. Note that the 4.7 IRA is still able to allocate every pseudo in the very same code; this is a result of Vladmir's significant IRA rewrite in 4.7 ... * Investigated Ramana's vld1 patches, and a problem with excessive vmov's in the PR 51819 test case pointed out by Ramana. It turns out that when we extract a lane from a vector to memory using an offsetted address, we move the value through a core register instead of simply computing the address and using vst1. I'm working on a patch to address this. 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

12 years, 10 months

[ACTIVITY] report week 04

by Peter Maydell

RAG: Red: Amber: Green: Current Milestones: || || Planned || Estimate || Actual || ||cp15-rework || 2012-01-06 || 2012-02-20 || || ||qemu-kvm-getting-started || 2012-03-04?|| 2012-03-04?|| || (for blueprint definitions: https://wiki.linaro.org/PeterMaydell/QemuKVM) Historical Milestones: ||a15-usermode-support || 2011-11-10 || 2011-11-10 || 2011-10-27 || ||upstream-omap3-cleanup || 2011-11-10 || 2011-12-15 || 2011-12-12 || ||initial-a15-system-model || 2012-01-27 || 2012-01-27 || 2012-01-17 || == cp15-rework == * discussions with Rusty == qemu-kvm-getting-started == * wrote patches for the A15 Fast Models boot-wrapper that allow you to pass the kernel/initrd/kernel command line via a parameter to the model rather than having to hard code them into an ELF file along with the boot-wrapper. This should make life a lot easier for the validation folk. * various discussions with validation/etc about what you can and can't do with a model and what the best setup is going to be * sorted out a Debian fs to use for KVM guest : this is needed because the kernel module doesn't do Thumb or VFP yet. * started on rearranging and improving the writeup/HOWTO on the wiki == other == * target-arm/arm-devs queues pushed upstream [Calxeda Highbank model is now in upstream QEMU] * helping Will Deacon track down what looks like a race condition in Linux's handling of VFP on SMP where signal handlers are involved * a QEMU Object Model patch series has landed upstream -- this will be a nasty rebase for qemu-linaro next week I think

12 years, 10 months

[ACTIVITY] w04

by Asa Sandahl

Hi! * -o2/-o3 benchmarking: Worked on and shared charts for the -o2/-o3 benchmark runs with gcc-linaro-4.6-2012.01. I have created charts for both the score of the benchmarks and the sizes (text segment) of the executables. Making improvements continuously as I get feedback from the team. The charts are stored in GoogleDocs: https://docs.google.com/a/linaro.org/leaf?id=0B1IP4dZWVaxZOGZlM2UwMGQtOGQyZ… * gcc4.7 benchmarking: Did benchmark runs on a late revision of gcc4.7. Next week I will process the data and list regressions/improvements against gcc4.6.2 and gcc-linaro-4.6-2012.01. * v8: Investigated possibility of running SunSpider stand-alone on the v8 engine. Found out that there is a stand-alone driver included in WebKit. Have built v8 on x86 and ARM (on ARM it takes ~18 min) and run SunSpider and the v8 benchmark suite. Next step I will try to build with another toolchain. It is not Make but SCons that controls the build, so I am not sure how to do that. https://wiki.linaro.org/AsaSandahl/Sandbox/JavaScriptBenchmarks * Bug triaging: I have triaged all "easy" ones in the list of new tickets. Michael will help me look through the rest of new and incomplete bugs which are mostly old ones (waiting for someone to take some action) or very tricky ones. Regards Åsa

12 years, 10 months

Re: GDB 7.4 released

by Michael Hope

On Wed, Jan 25, 2012 at 7:02 AM, Ulrich Weigand <Ulrich.Weigand(a)de.ibm.com> wrote: > > Hi Michael, > > GDB 7.4 has finally been released. What do we need to do to get the > 7.4-branch imported into Launchpad? I think last time (for 7.3) you did > that somehow ... Done as: lp:~linaro-toolchain-dev/gdb/7.4 and documented at: https://wiki.linaro.org/MichaelHope/Sandbox/GDBImport -- Michael

12 years, 10 months

QEMU A15 guest writeup

by Michael Hope

Peter, could you review: https://wiki.linaro.org/WorkingGroups/ToolChain/QEMUARMGuestQ411 please? I'm interesting in anything I've missed or exaggerated. The audience is the TSC or people outside Linaro who are interested in a summary of the changes. -- Michael

12 years, 10 months

Fwd: [cbuild] qemu-linaro-0~20120118+gitcc8661e armv7l completed

by Michael Hope

Hi Zygmunt. I've enabled the ARM native build on the QEMU auto builders. These are built in the validation lab on the Natty based tcpanda boards and end up on control under ~cbuild/cbuild/build/qemu-$version/qemu-$something.tar.xz. I've uploaded this build to http://people.linaro.org/~michaelh/incoming/qemu-armv7l-natty-cbuild236-tcp…. There's something wrong with embedding of the version number into the name. A quick 'does it run' test passes. Peter, could you check the configure log at: http://builds.linaro.org/toolchain/qemu-linaro-0~20120118+gitcc8661e/logs/a… and see if there's anything missing. The auto builders fire with each commit so there's always something up to date. You can list the builds at: http://ex.seabright.co.nz/helpers/buildlog/qemu and see the raw results at: http://builds.linaro.org/toolchain/qemu-linaro-0~20120118+gitcc8661e/logs/a… (after a lag) -- Michael ---------- Forwarded message ---------- From: Linaro Toolchain Builder <michael.hope+cbuild(a)linaro.org> Date: Thu, Jan 26, 2012 at 11:14 AM Subject: [cbuild] qemu-linaro-0~20120118+gitcc8661e armv7l completed To: "linaro-toolchain-builds(a)lists.launchpad.net" <linaro-toolchain-builds(a)lists.launchpad.net> tcpanda05 finished running job qemu-linaro-0~20120118+gitcc8661e on armv7l-natty-cbuild236-tcpanda05-cortexa9r1. The results are here: http://builds.linaro.org/toolchain/qemu-linaro-0~20120118+gitcc8661e 9 PASS 9 TEST This email is sent from a cbuild (https://launchpad.net/cbuild) based bot which is administered by Michael Hope <michael.hope(a)linaro.org>.

12 years, 10 months

[ANNOUNCE] Linaro Toolchain Binaries 2012.01 released

by Michael Hope

The Linaro Toolchain Working Group is pleased to announce the release of the Linaro Toolchain Binaries, a pre-built version of Linaro GCC and Linaro GDB that runs on generic Linux or Windows and targets the glibc Linaro Evaluation Build. This is the first release. Releases will be made each month shortly after the corresponding source release. Uses include: * Cross compiling ARM applications from your laptop * Remote debugging * Build the Linux kernel for your board What's included: * Linaro GCC 2012.01 * Linaro GDB 2011.12 * A statically linked gdbserver * A system root * Manuals under share/doc/ The system root contains the basic header files and libraries to link your programs against. The Linux version is supported on Ubuntu 10.04.3 and 11.10, Debian 6.0.2, Fedora 16, openSUSE 12.1, Red Hat Enterprise Linux Workstation 5.7 and later, and should run on any Linux Standard Base 3.0 compatible distribution. Please see the README about running on x86_64 hosts. The Windows version is supported on Windows XP Pro SP3, Windows Vista Business SP2, and Windows 7 Pro SP1. The binaries and build scripts are available from: https://launchpad.net/linaro-toolchain-binaries/trunk/2012.01 Need help? Ask a question on https://ask.linaro.org/ Already on Launchpad? Submit a bug at https://bugs.launchpad.net/linaro-toolchain-binaries On IRC? See us on #linaro on Freenode. Other ways that you can contact us or get involved are listed at https://wiki.linaro.org/GettingInvolved. -- Michael

12 years, 10 months

Re: -fsched-pressure options

by Michael Hope

On Wed, Jan 25, 2012 at 2:33 AM, Ulrich Weigand <Ulrich.Weigand(a)de.ibm.com> wrote: > > Michael, Åsa, > > as discussed in today's performance call, the 4.6 backport of Richard's > sched-pressure enhancements is available here: > https://code.launchpad.net/~rsandifo/gcc-linaro/alt-sched-pressure-4.6 > > To activate the feature, you need to use the options: > > -fsched-pressure -fsched-pressure-algorithm=model Åsa, I think we're ready to spawn benchmark jobs through the build farm. I've made a front end: http://ex.seabright.co.nz/helpers/scheduler/spawn to make it a little easier to use. To spawn a benchmark run, enter a job called benchmarks-<buildname> such as benchmarks-gcc-linaro-4.6+bzr106857~rsandifo~alt-sched-pressure-4.6 and spawn it into the 'test' queue. See the page for how to change the flags and benchmarks that are run. The results end up at: http://ex.seabright.co.nz/benchmarks/ which needs the password from: https://wiki.linaro.org/Internal/ToolChain I've spawned Ulrich's job into the queue as a test run. Let's see how it goes. If it works, you can spawn the ancestor (benchmarks-gcc-linaro-4.6+bzr106856) and later do a diffbench on the results. -- Michael

12 years, 10 months

Bug triaging: 739305 "[armhf] libffi variadic support"

by Asa Sandahl

Hi, I am looking at ticket 739305 "[armhf] libffi variadic support" which still has status "New" for Linaro gcc. https://bugs.launchpad.net/ubuntu/+source/libffi/+bug/739305 If I understand correctly, David's patch is included in libffi in Oneiric, but not yet backported to Linaro gcc? What is the correct thing to do with this ticket for Linaro GCC? I was thinking it could be set to "Triaged", waiting for an appropriate time to backport. Regards Åsa

12 years, 10 months

Linaro GCC mentioned in Phoronix article

by Christian Robottom Reis

Spotted this in a Phoronix article today: Overall it seems that most of the computational tests are performing better with the newer Ubuntu 11.10 and 12.04 user-space packages, which upgrades the GNU Compiler Collection to the 4.6 series over the 4.5 release found in Ubuntu 11.04. The 4.6 compiler upgrade with greater ARMv7 architecture enhancements is likely what can be attributed to most of the performance improvements found in this article. [...] See the results for yourself at: http://www.phoronix.com/scan.php?page=article&item=nvidia_tegra2_ubuntu&num… Good job, -- Christian Robottom Reis, Engineering VP Brazil (GMT-3) | [+55] 16 9112 6430 | [+1] 612 216 4935 Linaro.org: Open Source Software for ARM SoCs

12 years, 10 months

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