Hi,
* committed upstream a patch that reduces over-promotion of vector operations
* started to work on a new version of the patch to change the default
vector size for Neon
* attended Linaro connect
Ira
* Committed a set of SMS patches to trunk and gcc-linaro branch.
* Implemented a hack to evaluate the potential of SMS on SPEC2006/libqauntum.
* involved in non linaro issue
== QEMU ==
* After discussion with Peter started writing QEMU fixup for 64bit
atomic helper version location.
* Sent fixes for soc-dma code to qemu list
* Trying to understand just how much of omap_dma's code is needed.
== Other ==
* Travelling to/from connect
* Wanted to dial into some of the seessions in Corpus and Magdelen
rooms but the remote audio from them was unusable.
Dave
Hi,
Libunwind:
* finished initial ARM support for remote unwinding (libunwind-ptrace)
Android:
* took a closer look at the debuggerd
* got the perflab benchmark running on my PandaBoard using Linaro GCC
Misc:
* remotely attended some Linaro Connect Android sessions
Regards
Ken
== GDB ==
* Created Linaro GDB 7.3 branch
* Ported all remaining feature patches from Linaro GDB 7.2
* Backported mainline patches to fix remote test issues:
- Fixed #804387 Shared library test problems
- Fixed #804392 Rebuilt executables not copied
- Fixed #804396 Spurious failures
* Committed mainline patch to fix dlopen test cases
for remote testing (#804387).
* Committed mainline patches to fix misc. other remote
test problems (#804396).
== Misc ==
* Attended Linaro Connect in Cambourne.
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
I've updated:
https://wiki.linaro.org/RichardSandiford/Sandbox/NeonLibAv
so that it gives the output for current trunk, including Ira's commit
yesterday to reduce the amount of overpromotion. I also reran the
microbenchmarks. The good news is that the vectorised code is now
better in all cases than the non-vectorised code.
The biggest winner from last time was rgb24tobgr16_C(). It used to be
much worse with vectorisation due to lots of excessive widening.
Thanks to Ira's patch, the loop now looks pretty respectable,
and is ~3.25x faster than the non-vectorised code.
As well as using a more recent compiler, the new version also uses
-mvectorize-with-neon-quad. Once again it shows a significant improvement
over the default.
Richard
Continued work on widening multiplied. I've identified another cause for
the bootstrap failure, and submitted the new version for testing.
Continued trying to find out how my thumb2 constants patches are broken.
This is taking ages due to the time it takes to turn around a bootstrap
build on my IGEP board.
Tried to get the CS Panda boards to work again. They'll do the bootstrap
builds much faster (if still not quickly), but are no longer very well.
All my attempts to bring them back up remotely have failed. I've
discovered that the device the serial console on one was connected to
has been relocated to the new Mentor Graphics board lab, so this might
explain some of it ....
Chaired the Monday and Thursday meetings in Michael's absence.
Travelled to the Linaro Connect event in Cambourne, near Cambridge.
Other:
More machine trouble. I keep thinking I have the display issues solved,
and then it starts up with all the windows displayed double sized, but
requiring mouse clicks in the correct location .... typically this
happened just when I needed access to the pin number for the Monday
meeting. This hasn't happened since Monday, so hopefully it's now ironed
out ... this sort of thing does not happen with Windows. :(
----
Upstream patched requiring review:
* NEON scheduling patch
http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01431.html
* Looking into SMS patches sent to mainline which expands SMS
functionally to avoid using doloop. The patches resolve the recent
bootstrap failure on mainline.
http://gcc.gnu.org/ml/gcc-patches/2011-07/msg01807.html
* Continue looking into 462.libquantum.
Valgrind wants a less stripped ld-2.12.1.so or it won't work. The build
process (that Michael Hope put together) just downloads the
libc6_2.12.1-0ubuntu6_armel.deb, and the ld-2.12.1.so in there is fully
stripped. I thought I'd be able to just get the
libc6-dbg_2.12.1-0ubuntu6_armel.deb instead, thinking that was just the
pre-stripped version of these libs -- but apparently it's not, because
trying to use those libs instead of the stripped ones results in undefined
symbols. For example, ld-2.12.1.so defines _rtld_global -- but
libc-2.12.1.so is looking for _rtld_global@@GLIBC_PRIVATE, so
_rtld_global@@GLIBC_PRIVATE
ends up undefined. (Ditto for __tls_get_addr, __libc_enable_secure,
_dl_argv, etc.)
I'm not sure who actually builds these packages (they're retrieved from:
http://ports.ubuntu.com/pool/main/e/eglibc/), but if anyone has any
suggestions on how to get past this, I'd be most appreciative. (I've got
angry developers trying to track down memory issues, who about to come after
me with torches and pitchforks :P )
Thanks,
Diane
