Hi,
* continued to look into how to add remote support for libunwind using
ptrace
* reworked the lookup of the ARM specific unwind tables for local
unwinding
* re-use the existent (dwarf related) infrastructure to find the ARM
specific unwind tables rather than doing it on our own
* removes some code and the limitation of only supporting a certain
amount of unw tables
* (hopefully) smooths the way for remote unwinding via ptrace
* submitted a patch that fixes the syntax of inline assemblies for
some GCC versions
Regards
Ken
(This is a combined report having realized that I didn't manage to
send this out on Monday because of some power issues).
== GCC ==
== Progress ==
* Cleared out some backlog of backports from mainline.
* Investigating some of the BRANCH_COST results.
* Small patches to fix VFP constraints being tested and fixed on trunk
upstream.
* Upstream bugzilla triaging.
* Upstream bugzilla triaging.
* Looked at Neon 64 bit arithmetic and sent out report.
* Reviewed the unaligned access patch and the EPILOGUE_USES regression
with coremark.
* Issues with my panda board means my benchmark runs aren't happening.
Need to urgently find a way of running them. The panda board dies
mysteriously once a while. Playing around with the kernel to get
something going . Will look at it again next week.
* Merged neon shift immediates patch into linaro-4.6 but needs some rework.
* Merged the fix for LP744754 into linaro 4.5 and 4.6
== Plans ==
* Back on to BRANCH_COST .
* Resubmit neon shift immediates patch for merging.
* Look at some of the perf regressions between a8 and A9.
* Get a working panda board again. !
* Backport arith_shiftsi patch to 4.6 branch upstream.
Meetings:
* 1-1s
* TCWG calls.
== This week ==
* More on the address-of-main() bug. The original patch caused
regressions on x86_64, so I submitted a different approach,
which has now been applied upstream.
* Worked on the libnih bug. It turned out to be a problem in the
libc start routine.
* A bit of patch review.
* More on auto inc/dec.
== Next week ==
* General bug-fixing.
* More auto inc/dec.
Richard
== 64 bit atomics ==
* Submitted patches to gcc patch list
- One comment back already asking if we should really change ARM
to have a VDSO to make checks of the user helper version easier
* Added thumb ldrexd/strexd to valgrind; patch added to bug in their
bugtracker (KDE bug 266035)
* Came to the conclusion eglibc doesn't actually need any changes
- It's got a place holder for a 64bit routine, but it's unused and
isn't exposed to the libc users
- Note that neither eglibc or glibc built cleanly from the trunk on ARM.
* Started digging into QEmu a bit more to find out how to solve the
helper problem
== String routines ==
* Added SPEC2k6 string routine results to my charts; while most
stuff is in the noise it seems
the bionic routine is a bit slower overall than everything else, and
my absolutely trivially simple
~5 instruction loop is a tie for the fastest with my smarter 4
byte/loop using uadd.
== Next week ==
* Sleep, Rest, Relaxation, getting older
* (Will be polling email for any more follow ups on my gcc patches)
Dave
RAG:
Red:
Amber:
Green:
Current Milestones:
|| || Planned || Estimate || Actual ||
||qemu-linaro-2011-07 || 2011-07-21 || 2011-07-21 || ||
Historical Milestones:
(q1 milestones deleted)
||qemu-linaro 2011-04 || 2011-04-21 || 2011-04-21 || 2011-04-21 ||
||qemu-linaro 2011-05 || 2011-05-19 || 2011-05-19 || n/a ||
||close out 1105 blueprints || 2011-05-28 || 2011-05-28 || 2011-05-19 ||
||complete 1111 planning || 2011-05-28 || 2011-05-28 || 2011-05-27 ||
||qemu-linaro-2011-06 || 2011-06-16 || 2011-06-16 || 2011-06-16 ||
== upstream-omap3-patches
* analysed omap3 patchstack and identified some initial parts to pull out
* extracted and submitted upstream a 3-patch set to qdevify omap gpio
* disentangled a cluster of patches for fixing and qdevifying NAND,
ONENAND and the OMAP GPMC model; started on the cleanup process
* spotted and fixed a bug where n810 segfaults if a key is pressed
(this was already fixed in qemu-linaro but not very cleanly)
== other ==
* submitted patch for proper implementation of prlimit64 syscall
for qemu usermode
* sent a patch to fix the final gcc 4.6 write-only-variable warning
* patch review, etc
Current qemu patch status is tracked here:
https://wiki.linaro.org/PeterMaydell/QemuPatchStatus
Absences:
1-5 August: Linaro sprint 1111
(maybe) 15-16 August: QEMU/KVM strand at LinuxCon NA, Vancouver
[LinuxCon proper follows on 17-19th]
* Got introduced to most of the team members - great!
* My manager fixed a linaro laptop for med which I have installed with
Natty. (This is very good since I cannot run as root on my STEricsson
laptop. There are also other security restrictions that makes it very hard
to work in Linaro.)
* Started working a little bit with the Snowball board. I have managed to
flash it using the "riff" tool.
* Read through the material about SPEC2000.
* I have borrowed a Panda board that I can use for the next two weeks. A
question that popped up is how to get one from Linaro?
* I will be on vacation 18th July - 15 August
Best regards
Åsa
It all started with this:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/791552
basically, switching toolchain from 4.5 to 4.6, somehow broke usb on omap3.
This morning i tested with linux-linaro-natty:
[flag@newluxor linux-linaro-natty]$ git log --oneline -1
f15fd8f LINARO: Linux-linaro-2.6.38-1002.3
and i can reproduce the problem there too.
Here is some more info (dmesg, toolchain, lsusb, etcetc):
http://pastebin.ubuntu.com/620786/
--
bye,
p.
Hi,
- support of multiple uses of original pattern statements (needed for
over-promotion work) - committed upstream
- support of widen-mult of unsigned types and constants - merged to
gcc-linaro-4.6
- vectorizer peeling heuristic improvement - proposed to merge to gcc-linaro-4.6
Ira
