[ACTIVITY] report week 7
Progress: * rebased qemu-linaro and sorted out with Serge what he requires in the way of patches for Ubuntu's upcoming code freeze. I plan to set up and test the 2013.03 release a week or two early both so that there is a patchset ready for the Ubuntu freeze and also to avoid clashing with Connect week. * some patches to clean up QEMU's logging functions so they can be used more widely in place of ad-hoc printf * cleanup patchset to get rid of sysbus_add_memory() function * LP:1079080 -- fixed serious bug in QEMU's Thumb-mode srs insn * upstream discussion about what to do about QEMU's disassembler license-clash issues: http://lists.gnu.org/archive/html/qemu-devel/2013-02/msg02122.html * NB: I now work a 4 day week, excluding Wednesdays -- PMM ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] 11 - 15 Feb
== Progress == * Vectorizer - Progressing on the global structure alias analysis (discussions, drafts, failed attempts) - Interesting Linpack results for vectorizer, investigating performance - http://www.systemcall.org/blog/2013/02/llvm-vectorizer/ - http://llvm.org/bugs/show_bug.cgi?id=15247 * Buildbots - Took Chromebook out, since Pandas are fast enough - Creating LNT test-suite buildbot - http://llvm.org/viewvc/llvm-project?view=revision&revision=175081 - http://lab.llvm.org:8011/builders/clang-native-arm-lnt - Still a few rounds until it works properly * Distributed Builds - Distributed compilation works somewhat on Pandas - http://www.systemcall.org/blog/2013/02/distributed-compilation-on-a-pandaboard-cluster/ - It's better, cheaper and easier to use Chromebooks / Arndales, though... * LAVA - Tracking LLVM git repo in git.linaro.org - Trying to build from that repo, LAVA doesn't like it... :/ * EuroLLVM - We're not sponsoring it any more, will still help organize == Plan == * Continue Global Alias Analysis, I seem to be getting close to something worth sending (and learning a lot in the process) * Make sure LNT buildbot is up and running with vectorizer (O3) * Check with Dave Piggot why git.linaro doesn't work with LAVA * Inspect why some (loop+bb) vectorized results are poor on ARM ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-toolchain
Re: Hard Floating Point Question
>Christophe Lyon writes: > > Regarding your problems with ffmpeg, I'm sorry that I don't know how > cmake works, but after spending some time trying to understand why > cross-building fails, here are my remarks: > > - installing packages such as libavcodec-dev installs the version for > your host, not for your ARM target Hi Christophe, thanks for replay. ok I will take it into account. > - therefore, you should add ffmpeg to OpenCV, maybe using the 3rdparty > directory, but I don't know how it is supposed to be used I too don't know. Then Cross compiling is not so simple like this: http://processors.wiki.ti.com/index.php/Building_OpenCV_for_ARM_Cortex-A8 > - on my system, I have noticed that cmake says 'Could NOT find JPEG), > then "Media I/O: JPEG: libjpeg (ver 62)" and I can see that g++ is > called with -I/3rdparty/libjpeg, which is confusing Same thing happens to me with FFMPEG > - similarly, it looks like cmake is calling pkg-config which most > probably queries the host, not the target FS > - you have to make sure that the build process will find or build all > the dependencies for ARM, which probably means it has to build ffmpeg > - I don't know if all these are peculiarities of cmake or OpenCV, but > it makes me wonder whether OpenCV is really supporting > cross-compilation? > - did you ask OpenCV community? I could see OpenCV community recomend other ways to do what I want. > > Sorry to ask more questions :) > > Christophe. Best regards. ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-toolchain
Re: Hard Floating Point Question
On 4 February 2013 02:08, Matthew Gretton-Dann wrote: > On 2 February 2013 00:13, Derek Rollend wrote: >> Hello, >> >> I am currently trying to determine how much I can optimize OpenCV using the >> ARM's VFP and the Linaro nano image. I have downloaded the >> arm-linux-gnueabihf-gcc & arm-linux-gnueabihf-g++ compilers, successfully >> cross-compiled OpenCV using those compilers (with -O3 -mfloat-abi=hard >> -ftree-vectorize -funroll-loops), and compiled an example OpenCV program >> with the arm-linux-gnueabihf-g++ compiler (with the same flags). However, >> when I try and run my executable within Linaro (running on a gumstix overo) >> I get "/lib/arm-linux-gnueabihf/libm.so.6: version `GLIBC_2.15' not found >> (required by /usr/lib/libopencv_core.so.2.2). >> >> I assume that this is because on my build machine (x86 Ubuntu 10.04) where I >> cross compiled the OpenCV libraries I am using libc-2.15, and on the target >> (gumstix) the loader can't find libc-2.15. However, within the >> gcc-linaro-arm-linux-gnueabihf-4.7 tar ball I downloaded today, there is a >> libc-2.15.so file in there that I copied into /lib/ on the gumstix. Still >> no success though when I try running my executable. >> >> Any recommendations on things to try? I am hesitant to just put a newer >> version of glibc in Linaro as it seems like that could screw a lot of things >> up. Should I attempt to re-build OpenCV somehow with an older version of >> glibc (namely libc-2.13)? > > Expand the entire sysroot tarball you have onto your ARM board into > some location (say /opt/gcc-linaro - but anywhere will do). Then do: > LD_LIBRARY_PATH=/opt/gcc-linaro/lib/arm-linux-gnueabihf program-to-execute > args Please try to use --sysroot option. copy the entire sysroot directories (/lib, /usr/lib, /usr/include) you have onto your ARM board into some location (say /opt/gcc-linaro) on your host machine and keep the dir layout, i.e. After copy, you will have: /opt/gcc-linaro/lib/... /opt/gcc-linaro/usr/lib/... /opt/gcc-linaro/usr/inlcude... Then compile your project with additional gcc option: --sysroot=/opt/gcc-linaro/ -Zhenqiang ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-toolchain
[ACTIVITY] 11 - 15 Feb
== Progress == -Spawned CBUILD tasks with and without the patch proposed by Chung-Lin Tang to test current status of "Fix EPILOGUE_USES regression in CoreMark". Job is still in the queue. -Read references listed in gcc/ira.c to understand gcc IRA and went through the source code. -Experimented with simple test cases to analyse IRA debug output. == Plan for next week == - Analyse CoreMark results if ready and work on improvements. - Start with research for Removing unnecessary zero/sign extends when not working on "Fix EPILOGUE_USES regression in CoreMark. ___ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-toolchain
