linaro-toolchain

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5 participants
5682 discussions

[ACTIVITY] 28th Jan 2013 - 1st Feb 2013

by Omair Javaid

== This Week === * Joined Linaro, had welcome meeting with Matt * Set up my office at home * Laptop purchased and had it ready for development * Exchanged emails with various people for getting started and read a lot of administrative material on the wiki pages. * Registered for the connect, figured out visa process and sent request to Arwen for required documents. * Attended Weekly toolchain call, stand-up call and 1:1 with Matt. * Started work on GDB Testing in various configurations for analysis of current GDB status on ARM. * Build GDB on x86_64 machine and had test suite run in local and remote configuration. * Suffered from a bad run of cough n fever. == Next week == * Continue with Analysis of GDB status on ARM, hopefully get to access a pandaboard remotely and setup QEMU as well. * Apply for Hong Kong Visa for the connect. * Visit local market to resolve pending office setup and hardware requirements. * More Wiki reading and getting to know different processes at Linaro. * 5th February public holiday in Pakistan.

13 years, 1 month

[Activity] Week 05

by Zhenqiang Chen

Summary: * Linaro toolchain binary 2013.01 release * Move to using EGLIBC 2.17 in aarch64 build Details: 1. Linaro toolchain binary. * Document on how to do release test. * Help Bero on 2013.01 release. * Investigate lp:1107659. Crosstool-ng upstream has a workaround fix. 2. Move to using EGLIBC 2.17 in aarch64 build. * Update Linux version to 3.7.0 since eglibc 2.17 configure "checking for kernel header at least 3.7.0". * Migrate local patches for eglibc 2.16 to 2.17 and update the config to 2.17 * Package build is OK. Test on simulation is ongoing. 3. Collect SPEC performance for different branch costs. * The total results wave less than 0.5%. * Three cases have 1-2% regression for smaller branch cost. Will analyze the detail impact for the three cases. Plan: * Investigate coremark performance impact for different branch costs. * Commit EGLIBC 2.17 changes Planed leaves: * Feb. 9 - 15: Chinese Spring Festival. Best Regards! -Zhenqiang

13 years, 1 month

[ACTIVITY] 28 January - 1 February 2013

by Venkataramanan Kumar

== Progress == * Backport Tested and backported patch written to CSE optmize compares. http://gcc.gnu.org/ml/gcc-patches/2013-02/msg00015.html Ran GCC regression suite with ARMV8 foundation model for aarch64-none-elf * Implementing GC sections support in bintuils Had a quick look at changes need to be added. Reading about relocations that needed to considered for elf_backend_gc_sweep_hook * Tried using Cbuild for buildign and testing gcc4.7 aarch64 branch. ssh keys are not in sync. I am getting permission denied. Cheking with David and Andy in valdation team. Misc * Attend tool chain weekly meet, and stand up call * Attend usual AMD meetings * Performed one x86_64 AMD task * Booked tickets, hotel and got invite letter for Linaro connect. == Next week == * Complete Cbuild experiments to test gcc svn aarch64 4.7 branch. * Continue gc section support. Implement elf_backend_gc_sweep_hook

13 years, 1 month

[ACTIVITY] 28 January - 1 February 2013

by Christophe Lyon

== Progress == * 64-bits ops in Neon: No news from upstream. * vectorizer cost model: added possibility to tune the problem by processor type. * smin-umin: regression actually caused by a previous patch brought when merging bswap16 support. Investigation on-going. * managed to run spec2k on local board. Need to upload tools compiled for hf platform. * tcpanda heat problems: GCC testsuite passed. * hot-cold partitioning: posted a follow-up to google patches on gcc-patches. * looked at some codecs needing improvements (Neon intrinsics usage) * feedback on lava/cbuild integration * hotel/plane booked for Connect. == Next == * handle 64-bits bitops in Neon feedback from upstream if any * smin-umin: check bench results with probable culprit patch reverted. Will need investigation on trunk too. * vectorizer cost model: check bench results * get more codecs sample codes.

13 years, 1 month

[ACTIVITY] report week 5

by Peter Maydell

Activity: * calls and meetings * last bits and pieces of ARM QEMU patches sent prior to upstream 1.4 hardfreeze * continuing fixes for running a 3.8-rc4 vexpress kernel on QEMU: * refactored the way we handle SYS_CFG vexpress registers so it's possible to reasonably add support for more of them * put together a basic implementation of the various regs we're missing (oscillator, voltage, and some misc) * ideally this would be done via variable-length qdev array properties; started looking at how hard those would be to implement * investigated linux-user bug where an edge case in use of get_user_u32() had accidentally been broken; sent patch * all travel/hotels now booked for Connect -- PMM

13 years, 1 month

[ACTIVITY] 31 Jan - 1 Feb

by Matthew Gretton-Dann

== Progress == * Welcomed Omair to the team working on GDB * Starting investigating cortex-a9 bootstrap failure * Blueprints updating * Preparing for two new starters next week == Next week == * Welcome two new members to the team. * Finish cortex-a9 bootstrapping investigations == Future == * Run HOT/COLD partitioning benchmarks * Analyse ARM results * On x86_64 to see what the actual benefit we could get * fix-gcc-multiarch-testing * Come up with strawman proposal for updating testsuite to handle testing with varying command-line options. -- Matthew Gretton-Dann Toolchain Working Group, Linaro

13 years, 1 month

[ACTIVITY] 28-31 Jan

by Renato Golin

== Progress == * Maintenance - Fixing ARM buildbots, poking people to fix bugs, keeping them green - http://llvm.org/viewvc/llvm-project?view=rev&revision=173510 * Cost Model - Fixing some bugs on the generic code - http://llvm.org/viewvc/llvm-project?view=rev&revision=173691 - Adding some simple free cast (plus some infrastructure) - http://llvm.org/viewvc/llvm-project?view=rev&revision=173849 * LLVM - Investigating APFloat issue on Chromebook (bad libraries?) - Clang miscompiles and show same synthoms, will play with options next week - AArch64 back-end in, to be built by default * LAVA - Got three last errors due to include path ('bits/predefs.h' file not found) - libc6-dev + libstdc++-dev have no effect, problem doesn't show on buildbots - Testing heating problem with multiple images (only 12.02 is good) - Testing other boards, other images (with Dave) * Friday Holiday == Plan == * Try a bit more on the APFloat issue in Chromebook, but I think that's just bad distro (ChrUbuntu), since no one else has this problem. Has anyone put any Linaro image on a Chromebook? * Continue working on getting faster builds on LAVA (quad-core origen, Arndale, etc) with Dave Pigot. * Continue micro-benchmarking the vectorization and updating the cost-model. Start discussing the side-effects that are not modelled at all.

13 years, 1 month

[ANNOUNCE] Linaro Toolchain Binaries 2013.01 released

by Bernhard Rosenkränzer

The Linaro Toolchain Working Group and Platform Team are pleased to announce the 2013.01 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. Uses include: * Cross compiling ARM applications from your laptop * Remote debugging * Build the Linux kernel for your board What's included: * Linaro GCC 4.7 2013.01 * Linaro GDB 7.5 2012.12 * 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 12.04, 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/2013.01 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.

13 years, 1 month

Newbie question

by Kalai Narayanan-SSI

Hi, I have a few armv7 assembly tests. I'm trying to compile these using the linaro aarch64 toolchain and I'm getting errors. Is there any specific flag that I have to pass to enable backward compatibility to allow v7 assembly to be compiled for a v8 model? reset.s: Assembler messages: reset.s:32: Error: operand 1 should be an integer register -- `mov r0,#0' reset.s:33: Error: unknown mnemonic `mcr' -- `mcr p15,0,R0,C13,c0,1' reset.s:36: Error: unknown mnemonic `mrc' -- `mrc p15,0,r0,c1,c0,0' reset.s:40: Error: operand 1 should be a SIMD vector register -- `orr r0,r0,#0x00001000' .... Relevant assembly code: .... _reset: // init Context ID Register MOV r0, #0 MCR p15, 0, R0, C13, c0, 1 // Enable Instruction cache mrc p15, 0, r0, c1, c0, 0 /* set bits: 12 = I i-cache */ orr r0, r0, #0x00001000 mcr p15, 0, r0, c1, c0, 0 ..... This is my assembler command: aarch64-linux-gnu-as -march=armv8-a+fp --keep-locals -o "reset.o" "reset.s" Thanks, Kalai

13 years, 1 month

[ACTIVITY] 21-25 January 2013

by Christophe Lyon

== Progress == * 64-bits ops in Neon: waiting for upstream. * vectorizer cost model: initial activation with unaligned load/store cost equal to aligned ones; benchmarking shows no significant difference. * smin-umin: a few benchmarks show a few unexpected regressions (10-15%). * setting up spec2k on local board * tcpanda heat problems: GCC built OK. Don't know how hot it became. == Next == * handle 64-bits bitops in Neon feedback from upstream if any. * analyze regressions in smin-umin * check if more tuning of the vectorizer cost model is desirable. * finish local board setup * tcpanda: run gcc testsuite to check heat

13 years, 1 month

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