- linaro-toolchain - lists.linaro.org

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

14 years, 3 months

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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

14 years, 3 months

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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

14 years, 3 months

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agenda for tomorrow's call.

by Ramana Radhakrishnan

https://wiki.linaro.org/WorkingGroups/ToolChain/Meetings/2012-01-24 do folks have anything to add to this ? Ramana

14 years, 3 months

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[ACTIVITY] 16th - 20th January

by Andrew Stubbs

* Linaro Continued work on 64-bit multiplies. Cleaned up the patches a lot. Started testing work to check for correctness. Ironed out a few bugs. My turn for patch review week. * Other Spent most of the week in San Diego attending the formerly-known-as CodeSourcery annual meeting, now Mentor Graphics' ESD TOOLS team annual meeting.

14 years, 3 months

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[Activity] Week 3

by Ramana Radhakrishnan

Mostly bug hunting week with some time on Partial partial PRE. ==Progress=== * Fixed PR50313 - backport submitted to Linaro 4.6 branch for testing - Testing on FSF GCC 4.6 branch as well currently. * Followed up on PR48308 fix . No reply yet. * Triaged some of the test failures that we are currently seeing on FSF trunk. Reported a few bugs upstream which I think are now fixed. There are still too many vect failures for my liking ( nearly 30 odd unique) . Some of them are testisms and some of them probably need a bit of knowledge in the vectoriser. So could do with a hand here in case someone has some free time and needs things to look at . * Read up on Partial-partial PRE . Slow progress but getting a handle on the theory now. * Handed over the vld1 / vldm work to Uli - found another case where the compiler could do better while fixing up PR51819. Essentially in loop end code where we have cleanup code involving single elements from the vector, the backend prefers to move this to an integer register and store the value to memory which is just silly - See https://pastebin.linaro.org/385 * Fixed PR51819. Backported fix to Linaro 4.6 branch - The FSF 4.6 branch *doesn't* show this particular problem. === Plans === * Continue with partial-partial PRE . * Finish submitting PGO patch and ABI tests patch * Finish backporting PR50313 fix to the correct repositories. * Follow up on PR48308 and investigate this a bit further. * Start preparing for Connect 2012.q1 Absences. * Feb 6-10 : Linaro Connect Q1.12. * Feb 13- 18 : Holiday.

14 years, 3 months

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KVM tasks draft

by Michael Hope

I've taken the KVM Epic spec: https://wiki.linaro.org/WorkingGroups/ToolChain/Specs/KVMEpic and split this into a list of tasks: https://docs.google.com/spreadsheet/ccc?key=0Ap7fWLePADFVdHA3cTg1R3R2U2pzZ0… Mouse over the little orange triangle to see notes on what an item means.. There's a '1' in the column of each group that a task affects. I haven't put durations down. Some things are already under way outside Linaro. Comments? Feel free to edit directly. -- Michael

14 years, 3 months

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[ACTIVITY] Jan 16 - Jan 20

by Ulrich Weigand

== GDB == * Fixed some final minor issues with remote "info proc". Committed patch set to implement remote "info proc" (LP #804411) and remote core file generation (LP #804406) to mainline. Backported to Linaro GDB 7.3. == GCC == * Created patch to fix optimization failures on x86_64 exposed by Richard's subreg forward-propagation patch. * Set up Richard's loop-microbenchmarks suite and verified that the subreg forward-propagation patch causes no regression anywhere, and shows measurable improvements on some cases in GCC mainline. With the Linaro GCC 4.6 backport, results don't look as good; still investigating the cause. * Started looking into Ramana's vld1 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, 3 months

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[ACTIVITY] weekly status

by Ken Werner

Hi, * hacked the external toolchain recipe to use the latest version of the binary toolchain this kind of reverts the multiarch changes since oe doesn't support it yet * built the minimal, sato and qt images for armv7-a in three different flavors (-O2, -O3 -fno-tree-vectorize, -O3) using gcc-linaro-arm-linux-gnueabi-2012.01-20120112+bzr2318~linux see: http://people.linaro.org/~kwerner/oe-core/ * encountered that binutils 2.22 (the gas) fails to build with -O3 due to a warning about an unitialized variable I'm not convinced this is a real bug, I'll look at it as time permits workaround: --disable-werror * all nine of them (the images) are booting within qemu using vexpress_defconfig! There is one glitche with the mouse pointer: it doesn't match to the one of the SDL/VNC window as the guest pointer sometime accelerates faster that the host pointer I can hardly imagine this is due to miscompiled code * Extracted size informations about the generated ELF files: https://docs.google.com/spreadsheet/ccc?key=0AmsCLxCMnnISdDNQSEM2ZHIxd3dVNj… Regards, Ken

14 years, 3 months

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[ACTIVITY] report week 03

by Peter Maydell

RAG: Red: Amber: Green: A15 vexpress system model sufficient for KVM guest now done Current Milestones: || || Planned || Estimate || Actual || ||cp15-rework || 2012-01-06 || 2012-02-20 || || ||initial-a15-system-model || 2012-01-27 || 2012-01-27 || 2012-01-17 || ||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 || == cp15-rework == * some (slow) progress on this * made a list of the missing pieces in my current patchset and knocked off a few of the easier ones * fortunately this blueprint isn't really a critical blocker for KVM work any more == initial-a15-system-model == * vexpress-a15 now submitted upstream (in review) and in qemu-linaro * ...so this blueprint is complete * NB: doesn't boot in KVM but this is a trivial kernel-side issue == other == * this category seems to take most of my time :-( * patch review: still Calxeda, Samsung * patch review: softfloat type fixes * identified some bugs in softfloat and arm code that surface if a softfloat type is 64 bits (at the moment it is 32 bits in practice but it is being proposed to widen it) * wrote up the issues to be solved so somebody else can do qemu-linaro releases * got qemu-jeos building for ARM [an attempt at making qemu testing easier by having an automated "build toolchain/kernel/initrd" setup] * retested QEMU fused-multiply-accumulate against an A15 FPGA

14 years, 3 months

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Narrowing down regressions on trunk

by Michael Hope

Hi Åsa. The GCC 4.7 release is coming up and the ARM testsuite shows a lot of regressions: http://ex.seabright.co.nz/helpers/testlog/gcc-4.7~svn183205/logs/armv7l-nat… We've been running three builds a week: http://ex.seabright.co.nz/helpers/buildlog/gcc-4.7~svn and can use the result to track down the range of commits where a fault was introduced or exposed. Could you please look through the results and narrow down where each failure appeared? I've uploaded all of the results to: http://people.linaro.org/~michaelh/incoming/trunks.tar.xz One way is to look at the testsuite-diff.txt in each build as it should show the change in test results between one build and the next but might be incomplete. Another way is to pull the failures out of gcc-testsuite.txt and do a diff against the previous version. The output should be a revision range for each of the current failures. Script it up. Don't do it by hand. I'm not that mean. Ta, -- Michael

14 years, 3 months

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[ACTIVITY] w03

by Asa Sandahl

* Started with bug triaging, looked at four different bugs (including Michael's example). Challenging, but interesting. Got great help from Ramana and Andrew. * -o2/-o3 benchmark runs with gcc-linaro-4.6-2012.01 done. coremark, eembc, denbench, pybench and spec2000. Uploaded all results ~linaro-toolchain-wg/linaro-toolchain-benchmarks/private-runs. Posted results for -o2-neon vs -o3-neon-novect. Working on charts including also -o3-neon and -os. Got a bit too occupied with making the matplotlib charts look pretty. I will try to get all results posted next week. * Started the add-sunspider-as-a-benchmark blueprint in the background. Built the v8-engine stand alone on x86 (just with default options). It has a sample shell included. You can feed it with .js-files. Tried the v8 benchmark, which also comes with the engine. Regards Åsa

14 years, 3 months

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Absence next week (Jan 21-29, 2012)

by Zhenqiang Chen

Hi all, I will be out for vacation during Chinese Spring Festival (Jan 21-29, 2012). For emergency, call me at +86-13817948562. Best regards! -Zhenqiang

14 years, 3 months

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[ACTIVITY] Week 03

by Zhenqiang Chen

Summary: * Enhance crosstool-ng build process. Details: 1. Linaro crosstool-ng patches: * Update and commit the patch to strip debug sections. * rm *-cc.exe symblink for win32. * enable gdb for win32 (lp:918479) * Update README to add flip dependence for build. 2. Verify the following bugs and change status to "Fix Committed" * lp:906729 baremetal libc headers and libraries are in inconsistent places * lP:906077 binaries: baremetal include files are in the wrong place * lP:894527 binaries: remove all symlinks from the Windows build * lp:889984 binaries: should step across helper functions * lp:906662 binaries: pgversion can get out of sync with product 3. Analyzed bugs * lp:915137 Link failure due to absolute paths: Need more information to reproduce. * lp:p18478 wind32 doesn't have pkg-config: Try to build pkg-config for mingw32 host. But failed since it required preinstalled glib2. And configure error if cross building the glib. * lp:894528 binaries: can't run if the patch contains whitespace. Can not reproduce it on cygwin, but still have issue in DOS cmdline 4. Verify the prerelease binary package on windows. And find and workaround a gdb document name issue since filename on windows is case insensitive (lp:909195). 5. Raise the gcc trunk build fail issue to crosstool-ng mail-list. But not confirm "-EL" is the final root cause. Need more investigation. Planned Absence: * Jan 21-29, 2012 Chinese Spring Festival Best regards! -Zhenqiang

14 years, 3 months

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cross compiling eglibc with Linaro toolchain

by shyamalan sivan

Hello experts, I don't know whether this is the place to ask this question.Please forgive if i am wrong. I am trying to cross-compile Eglibc,(which i thought is similar to the glibc) library with Linaro tool chain.My aim is to cross-compile the library and add it with the tool-chain( i assumed that Linaro doesn't ahve the eglibc libraries by itself). . I referred to the link http://www.eglibc.org/archives/patches/msg00078.html (README.cross-compiling of the libc) and did the following. I thought that binutils is not required as the tool chain itself contains the loader, assembler etc.(which are the most important in the binutils).So i skipped that step.(i am not sure whether this is right.please correct me if i am wrong). I did the below steps as in the above link. 1) Copied the Linux Kernel Headers 2) EGLIBC Headers and Preliminary Objects 2.1) configuring the Eglibc headers by the below steps. appan@oplt$ ~/cross_compile_eglibc/ppc/obj/eglibc-headers$ BUILD_CC=gcc CC=/home/appan/cross_compile_eglibc/ppc/tools/bin/arm-linux-gnueabi-gcc CXX=/home/appan/cross_compile_eglibc/ppc/tools/bin/arm-linux-gnueabi-cpp AR=/home/appan/cross_compile_eglibc/ppc/tools/bin/arm-linux-gnueabi-ar RANLIB=/home/appaan/cross_compile_eglibc/ppc/tools/bin/arm-linux-gnueabi-ranlib /home/appan/cross_compile_eglibc/src/libc/configure --prefix=/home/appan/CC_EGLIBC --with-headers=/home/appan/cross_compile_eglibc/ppc/sysroot/usr/include/ --build=i686-pc-linux-gnu --host=arm-unknown-linux-gnu --enable-add-ons --with-tls --with-__thread 2.2) compilation make install-headers install_root=$sysroot install-bootstrap-headers=yes But following is the error i get. > /home/appan/cross_compile_eglibc/ppc/obj/eglibc-headers/Versions.v.iT<http://versions.v.it/> In file included from <stdin>:1:0: ports/sysdeps/arm/nptl/tls.h:48:3: error: #*error "TLS support is required.* " make[1]: *** No rule to make target `headers_install'. Stop. make[1]: Leaving directory `/home/appan/cross_compile_eglibc/src/libc' make: *** [headers_install] Error 2 I tried googling, but i did not get the solution for this.. please provide me with some suggestions and that will be of great help to me... thanks and regards appan

14 years, 3 months

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Automatically save preprocessed source on ICE

by Asa Sandahl

Hi there! I need some help with how to handle this bug: https://bugs.launchpad.net/gcc-linaro/+bug/873977 It looks like an improvement suggestion more than a bug. Regards Åsa *Automatically save preprocessed source on ICE*In order to help with bug reporting, gcc could save the preprocessed source of the unit that caused the ICE, so one can just pick it up and attach it to bug reports instead of trying to reproduce it manually.

14 years, 3 months

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KVM and OpenStack integration

by Michael Hope

Hi Peter. I've had a poke about in qemu-linaro, OpenStack, and libvirt to get a feel for the KVM integration work. My scratch notes are here: https://wiki.linaro.org/MichaelHope/Sandbox/QEMUA15GuestNotes I'm feeling happy about the integration. The parts that I've seen have good separation, are architecture neutral, and have some ARM support. We can prototype using virtual x86 based masters and QEMU TCG based compute instances. I've seen a few bugs and assumptions: OpenStack defaults to virtio, boot=hda, and fixed kernel args; and libvirt can't parse the the qemu-linaro version string. There will be more. I'll feed this into the KVM 1.0 task list and share it. -- Michael

14 years, 3 months

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New conference call number

by Michael Hope

Hi there. Starting next week we'll switch to the Zip conference line. See: https://wiki.linaro.org/Resources/ZipConferenceLine under 1-719-457-1414 for a list of numbers. A selected few are: UK 0 808 101 1146 Germany 0 800 181 9019 Sweden 02 079 7556 Brazil, Sao Paulo Local +55 11 5582 6534 Australia 1 800 105 680 China +400 148 5400 NZ 0800 451 015 The code is 763 804 0680. I've updated the meeting calendar and will update the wiki page once Monday comes around. The moderator code is on the toolchain internal page. Amber, could you update the public event please? Ramana, could you update the performance call for two weeks time? Maybe move it to linaro-events so I can edit it. -- Michael

14 years, 3 months

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Cross-compiling Eglibc library with Linaro toolchain

by Amber Graner

Hi all, In my search for Linaro related news this morning, I saw a tweet from Linuxquestions.org referencing a cross-compiling questions. Here is the link to the post on Linuxquestions.org - http://www.linuxquestions.org/questions/linux-embedded-78/cross-compiling-e… Thanks, I'll answer from the Linaro Tweeter account that it's been past to the Linaro Developers. Cheers, Amber -- Amber Graner User Experience and Community Specialist Linaro.org <http://www.linaro.org/>* **│ *Open source software for ARM SoCs* *** Follow *Linaro: *Facebook <http://www.facebook.com/pages/Linaro> | Twitter<http://twitter.com/#%21/linaroorg> | Blog <http://www.linaro.org/linaro-blog/> *+1.828.582.9469* cell *+1.828.395.1049* office irc: akgraner amber.graner(a)linaro.org (email and Google chat)

14 years, 3 months

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Triage of #914703

by Asa Sandahl

Hi Michael, So, I gave my best shot at: https://bugs.launchpad.net/gcc-linaro/+bug/914703 Kind of similar to the one in your walk-through, but I couldn't actually reproduce on the version reported. Could you please check if this looks OK? Regards Åsa

14 years, 3 months

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Bug triage run-through

by Michael Hope

Hi Åsa. I've triaged a bug and written down my notes on the way. See: https://wiki.linaro.org/MichaelHope/Sandbox/TriageRunThrough This one turned out to be easy but at least you have the basics. Could you triage the bug for real and see what I've missed? I'm unsatisfied with the result on that bug. The fault is in the Ubuntu Natty compiler which we've long since fixed in Linaro GCC. It would be nice if we could point the bug reporter to an updated GCC. Ask Marcin and Matthias what they think. -- Michael

14 years, 3 months

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[ACTIVITY] Week 02

by Zhenqiang Chen

Summary: * Enhance crosstool-ng build process. Details: 1. crosstool-ng patches: * Reproduce the build process by following the README and enhance the document. * Update .config to strip all toolchain executables * Replace harded-coded VERSION by reading config file. * Remove host libiberty.a * Patch on how to strip debug sections is in discussion. 2. Update the crosstool-ng based embedded toolchain build scripts according to the review comments. And replace most of hard-coded config by reading them from .config. 3. Unexpected build fail for gcc 4.7/trunk from crosstool-ng due to unsupported ENDIAN_LDFLAG "-EL", which is used in "LDFLAGS_FOR_TARGET" to build libstdc++. (LDFLAGS_FOR_TARGET seams not used in gcc 4.6). Need more investigation. Plan: * Fix the binary build related bugs. * Ramp-up on gcc. Planned Absence: * Jan 21-29, 2012 Chinese Spring Festival Best regards! -Zhenqiang

14 years, 3 months

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uImage built with pre-built linaro toolchain failed to start

by Lv Terry-R65388

Hi, I use pre-built version of linaro toolchain (got from http://people.linaro.org/~michaelh/incoming/binaries/) to build a uImage. The build succeeded, but the uImage couldn't start. The console hangs at: Using FEC0 device TFTP from server 10.193.100.158; our IP address is 10.193.102.233 Filename 'uImage_linaro'. Load address: 0x70800000 Loading: ################################################################# ################################################################# ################################################################# ####################### done Bytes transferred = 3193292 (30b9cc hex) ## Booting kernel from Legacy Image at 70800000 ... Image Name: Linux-2.6.38-01026-gc9c8ead Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 3193228 Bytes = 3 MB Load Address: 10008000 Entry Point: 10008000 Verifying Checksum ... OK Loading Kernel Image ... OK OK Starting kernel ... Uncompressing Linux... done, booting the kernel. Does anyone meet this before? How can I fix it? Thanks~~ Yours Terry

14 years, 3 months

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[ACTIVITY] w02

by Asa Sandahl

* Started with some day-to-day activities in the team. Looking after the proposals and the cbuild scheduler. Will start Created problem log for scheduler problems, there is a link to it from the jobs page. https://wiki.linaro.org/WorkingGroups/ToolChain/SchedulerProblems * Worked on producing graphs for benchmark results using matplotlib. Michael: Would it be ok to put my script in linaro-toolchain-benchmarks/scripts? * Kicked off some benchmarks with gcc-linaro-4.6-2012.01. To start with coremark, eembc, denbench, pybench and spec2000. We will see what's there after the weekend. Variants: os-neon, o2-neon, o3-neon-novect and o3-neon. /Regards Åsa

14 years, 3 months

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[ACTIVITY] Jan 09 - Jan 13

by Ulrich Weigand

== GDB == * Implemented, tested, and posted for discussion yet another version of remote support for "info proc" and core file generation, this time via accessing /proc files via generic file I/O primitives. == GCC == * Tested and merged Revital's fix for LP #879725. * Tested Richard's patch to help code generation for NEON strided loads by enabled forward-propagation of subreg expressions. This caused optimization failures on x86_64; investigated the root cause and engaged in discussion on mailing list on potential fixes. * Helped Ramana look into PR 43808 and PR 50313. 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, 3 months

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