The Linaro Toolchain Working Group is pleased to announce the release
of Linaro QEMU 2011.06.
Linaro QEMU 2011.06 is the latest monthly release of qemu-linaro.
Based off upstream (trunk) QEMU, it includes a number of ARM-focused
bug fixes and enhancements.
This release introduces two new features; these are still experimental
so please report any issues:
- A model of the Gumstix Overo board; this is an OMAP3 based system
similar to Beagle but with the advantage of having supported
onboard ethernet.
- USB keyboard and mouse support, if your kernel includes support for
the OMAP3 OHCI controller (not just EHCI). Try adding
"-device usb-kbd -device usb-mouse" to your QEMU command line for
Beagle or Overo models.
Other interesting changes include:
- A fix for the lack of graphics output on the Beagle model when
running the Linaro 11.05 final release image
- Suppression of the "Bad register 0x000000f8" warnings provoked by
the Linaro 11.05 final release kernels
- As usual, various minor correctness fixes and other upstream changes
Known issues:
- The beagle and beaglexm models still do not support USB networking
- There are some gcc 4.6 warnings about "variable set but not used"
which have not yet been resolved; Ubuntu Oneiric's gcc makes these
non-fatal, but if you're building with an upstream gcc 4.6 you may
need to add the "--disable-werror" option to configure
The source tarball is available at:
https://launchpad.net/qemu-linaro/+milestone/2011.06
Binary builds of this qemu-linaro release are being prepared and
will be available shortly for users of Ubuntu. Packages will be in
the linaro-maintainers tools ppa:
https://launchpad.net/~linaro-maintainers/+archive/tools/
More information on Linaro QEMU is available at:
https://launchpad.net/qemu-linaro
The Linaro Toolchain Working Group is pleased to announce the release
of both Linaro GCC 4.6 and Linaro GCC 4.5.
Linaro GCC 4.6 is the fourth release in the 4.6 series. Based off the
latest GCC 4.6.0+svn174261, it adds new optimisations and vectoriser
improvements.
Interesting changes include:
* Updates to 4.6.0+r174261
* Blocks can now vectorise into ORN and BIC instructions
* Support for half word to double word multiply and accumulate operations
* Better support for other widening multiply operations
* Further performance improvements in NEON strided loads and stores
* Performance improvements targeted at EEMBC CoreMark
Fixes:
* PR target/48454: Set the lengths correctly for the case with Quad vectors.
Known issues:
* Building Python 2.7 with -mfpu=neon exposes a bug in vmov.i64 in
binutils 2.20.51. Please use 2.21 or later.
The strided load/store improvements allow the vectoriser to
efficiently access values that occur at every n'th address, such as
all of the red values in a RGB image or all of the left channel
samples in a interleaved audio array. For example, a plain C function
that converts between RGB and CYMK now runs 7.3 x faster on an A9.
Linaro GCC 4.5 2011.06 is the eleventh release in the 4.5 series.
Based off the latest GCC 4.5.3+svn174250, it is a maintenance focused
release.
Interesting changes in 4.5 include:
* Updates to 4.5.3+r174250
Fixes:
* LP: #744754: ICE in reload_cse_simplify_operands, at
postreload.c:402 with neon optimized code
* LP: #748138: ICE in redirect_jump, at jump.c:1443
The source tarball is available from:
https://launchpad.net/gcc-linaro/+milestone/4.6-2011.06-0https://launchpad.net/gcc-linaro/+milestone/4.5-2011.06-0
Downloads are available from the Linaro GCC page on Launchpad:
https://launchpad.net/gcc-linaro
Mailing list: http://lists.linaro.org/mailman/listinfo/linaro-toolchain
Bugs: https://bugs.launchpad.net/gcc-linaro/
Questions? https://ask.linaro.org/
Interested in commercial support? inquire at support(a)linaro.org
-- Michael
Hi there,
I tried to use android-toolchain-eabi-4.5-2011.05-0-linux-x86.tar.bz2
to enable hard float ABI.
But it built failed on Android 2.3.3. Most errors are like address
alignment issues.
Did you have any patch for that? Successfully tested?
Thanks
Richard
My testing for the widening multiplies patches came back clean. I've
committed it upstream, and merged it to Linaro GCC 4.6.
The testing for my Thumb2 constants patches failed (bootstrap failure on
ARM), so can't commit that right away. The failure is a SIGSEGV in the
stage 2 compiler building it's own libgcc. This is going to be tricky to
pin down!
Continued work on widening operations in the GCC middle-end. I now have
it doing all the arbitrary width widening operations that I want. I've
tested that it didn't do the wrong thing for just about all permutations
of input and output types, but I've yet to do anything like a bootstrap
test or anything. There's still quite a lot more work to do in tidying
it up.
----
Upstream patched requiring review:
* NEON scheduling patch
http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01431.html
Tracked a bootstrap failure with SMS flags on ARM machine exposed in
recent trunk.
Fixed and tested a patch for that.
Tested another SMS patch following comments received from gcc ml@
(http://gcc.gnu.org/ml/gcc-patches/2011-05/msg02294.html)
Following conversation with Micheal, added SPEC2006 analysis info to
the benchmarks wiki page
-https://wiki.linaro.org/Internal/ToolChain/Benchmarks
Discussed with Ramana weird RTL pattern generated for
thumb2_movhi_insn with -march=armv7-a -mthumb using trunk. Probably
will open a PR for that.
Hi,
* learning more on andoid (repo tool, some branches, the basics of the
android build system)
* finished to setup my environment to build the android sources
* sucessfully build linaro-android using linaro gcc 4.4, 4.5 and 4.6
* tracked down the libgui.so linaro android issue to the apriori
prelinker
* workaround: disable prelinking for this module (patch -> linaro-dev)
* I still don't understand what exactly is supposed to be prelinked
and what's exactly causing the fail
* Note: next Monday is a public holiday in Germany
Regards
Ken
== String Routines ==
* Completed gathering the SPEC2k6 memcpy results, graphed them, sent them out
* Gathered SPEC2k6 memset results, graphed them, sent them out
== 64bit Atomics ==
* Modified gcc backend to do 64bit Atomic ops - the code looks good,
but I've not
done much testing yet.
== Other ==
* Upstreamed a small ltrace patch
Next week:
Plan is to get gcc tests done and attack libgcc for the pre-v7
fallbacks (the tricky
bit there is runtime deciding what to use)
Also run spec and denbench for strlen and some other string routines
== Progress ==
* Spent some time on the VFP moves and look at ivopts for a bit.
Analysing a couple of options here.
* Committed the DImode moves patch upstream.
* Fixed PR49335 where GCC was generating rsb ip, sp, ip lsl #2
* Proposed a fix for PR48454 (finally being able to reproduce it) -
was a case of a missing length attribute for vec_pack_trunc.
* Investigated some regressions in v1 of a popular embedded benchmark
- leads to BRANCH_COST tuning.
* Merged by neon-vorn-vbic patch into linaro-gcc :4.6
== Plans ==
* Spend some time on the VFP moves and look at ivopts for a bit.
* Merge the fix for lengths to linaro-gcc:4.6 and 4.5 if applicable.
* Merge fix for PR49335 to linaro-gcc:4.5 and 4.6 .
* Find some time for some upstream patch review.
* T2 performance review meeting/
Meetings:
* 1-1s
* TCWG call.
RAG:
Red:
Amber:
Green: USB kbd+mouse finally working on QEMU beagle model
Current Milestones:
|| || Planned || Estimate || Actual ||
||qemu-linaro-2011-06 || 2011-06-16 || 2011-06-16 || ||
Historical Milestones:
||finish qemu-cont-integn || 2011-01-25 || 2011-01-25 || handed off ||
||first qemu-linaro release || 2011-02-08 || 2011-02-08 || 2011-02-08 ||
||qemu-linaro 2011-03 || 2011-03-08 || 2011-03-08 || 2011-03-08 ||
||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 ||
== upstream-omap3-patches ==
* started on disentangling the patchstack: submitted patches upstream
for a few standalone fixes. First few steps in a big job...
== omap3-usb-model ==
* added QEMU's USB OHCI model to the omap3/beagle, and (after some
debugging and submitting a couple of OHCI bugfixes upstream)
got USB keyboard and mouse working
== linaro-qemu-11.11 ==
* rebased on master and identified gcc 4.6 compiler patches we need
== other ==
* added and tested patches for an overo board model
* added Beagle board support for returning EDID data from a fake
monitor so the kernel will actually turn the display on
* discussions about Android emulator (which looks likely to take the
upstreamed ARMv7 translator with the fixes we've worked on over
the last six months)
* office move
* QEMU 0.15 is not too far in the future: need to make sure all the
ARM stuff we want is in it
Meetings: standup, GSoC student, Christoffer Dall (working on KVM for ARM)
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]
Hi,
- vectorization of widening multiplication of unsigned types and
constants - committed to mainline
- fix vectorizer testsuite failures on ARM - submitted
- testing a patch to fix a bug in the vectorizer revealed by the
widen-mult patch
- testing a patch to fix bad peeling heuristic that causes
gcc.dg/vect/vect-72.c to fail on ARM
Ira
I've done a quick write-up on the (almost) continious builds done in
the toolchain group:
https://wiki.linaro.org/WorkingGroups/Builds
It's high level and includes things like what branches we watch, how
often they get built, where the results go, and how things like
testsuite results are shared. This is in follow up to the email on
testsuite diffs yesterday.
-- Michael
Public Holiday on Monday.
Learned that Linaro are reducing their funding to just one CodeSourcery
engineer, myself. Spoke to Chung-Lin to break the news and reassign him
to other work. Chung-Lin will now be working on MIPS16 Eglibc porting.
Pinged my ADDW/SUBW patch, again. Ramana finally reviewed it, so I've
addresses his concerns and reposted. The corrected patch was approved,
so I've set it to test before committing.
Continued work on widening multiplies tree optimizations in GCC. Bernd
made it sound quite easy, but changing the type of some operations means
quite a lot of tweaking and reworking in the rest of the compiler expand
routines. In particular, the widening stuff needs to be broken out of
expand_binop, and recast.
Merged, tested and committed the latest patches from FSF 4.5.
Merged, tested and committed the latest patches from FSF 4.6.
Richard Earnshaw approved my widening multiply RTL patch, so I've set
that to test in the Linaro test system.
Richard also approved my SMLALTB/SMLALTT patch. Set that testing also.
Responded to a question on ask.linaro.org.
----
Upstream patched requiring review:
* NEON scheduling patch
http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01431.html
Fixed an SMS patch following comments received in the gcc@ ml.
While testing the fix I discovered another issue-- latest mainline
ICEs with SMS flags while building libgcc on ARM configured with
--with-arch=armv7-a.
This new failure does not seem to be related to the above fix and I'm
now investigating it.
Looked at code generated for spec2006's libquantum, hmmer and
cactusADM_base benchmarks.
== String routines ==
* Wrote a hybrid ARM/Neon memcpy - it uses Neon for non-aligned cases or
large (>=128k) cases
* polished up and sent out write up of workload analysis of denbench and spec
* Ran denbench with all memcpy and memset varients, graphed up results
- SPEC 2k6 is now cooking with the memcpy set - it'll take all weekend.
== 64 bit atomics ==
* Started looking through the Gcc code at the existing non-64bit atomic code;
I need to understand how registers work in DI mode and what's going to be
needed in terms of temporaries.
Dave
== Progress ==
* Finished breaking down the Thumb2 performance blueprint
* Some patch review and bugzilla maintenance.
* Canonicalized vorn and vbic. Bootstrap failure reported . Fixed upstream
* Rewrote parts of the DImode expanders and combined them to two
patterns with alternatives that get enabled based on the architecture
variant. While looking at the bug with adr's possibly going out of
range, it looks like there is a bug in const_ok_for_op with respect to
how it attempts to generate code for a DImode move of 0xffffffff which
can be implemented as a simple mvn but gets split into 3 instructions
More explanations in the patch when it comes out.
* Thumb2 performance meeting this week.
* Talked to RichardS about A8 and Neon / auto-increment issues he was
seeing with scheduler descriptions and looked again at the A8 TRMs and
the examples.
* Looked at lrint and lrintf which are C99 functions for rounding and
created a prototype lrint and lrintf patch for GCC that now appears to
generate the vcvtr instructions.
== Plans ==
* Spend some time on the VFP moves and look at ivopts for a bit.
* Finish testing and submit upstream my other patch with DImode moves
and cases where we are splitting more than necessary.
* Start looking at some of the T2 performance work items.
* Patch review. Finish TLS patch review .
* Try to get vcvtr working and tested with eglibc.
* Look at RichardS's comments and testcase for the A8.
Meetings:
* 1-1s
* Linaro calls.
[Short week: bank holiday]
RAG:
Red:
Amber:
Green:
Current Milestones:
|| || Planned || Estimate || Actual ||
||qemu-linaro-2011-06 || 2011-06-16 || 2011-06-16 || ||
Historical Milestones:
||finish qemu-cont-integn || 2011-01-25 || 2011-01-25 || handed off ||
||first qemu-linaro release || 2011-02-08 || 2011-02-08 || 2011-02-08 ||
||qemu-linaro 2011-03 || 2011-03-08 || 2011-03-08 || 2011-03-08 ||
||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 ||
== upstream-omap3-patches ==
* started on disentangling the patchstack: submitted patches upstream
for a few standalone fixes. First few steps in a big job...
== omap3-usb-model ==
* added QEMU's USB OHCI model to the omap3/beagle; the kernel detects
the USB controller and hub but not any attached devices; more
debugging required
== other ==
* discussions about Android emulator
* office move
* QEMU 0.15 is not too far in the future: need to make sure all the
ARM stuff we want is in it
Meetings: standup, GSoC student
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]
== This week ==
* Spent about half of the week on auto increment/decrement. There are two
execution failures left.
* Looked at assembly comparisons between the old pass and various forms
of the new pass. The results look reasonable.
* Ran DENbench and my libav microbenchmarks to measure the difference
in performance. Saw that some tests were repeatably worse.
* Looked into those tests and realised that they were being hit by the
lack of an address writeback model in the scheduler (a known limitation).
Dependent stores were being scheduled in a block at the end of the loop
because we said that the dependencies had 0 latency.
* Spent most of the rest of the week on fixing that limitation. One of the
difficulties is that define_bypass currently requires a complete list
of instruction reservations. This is difficult for things like writeback
because the result could in principle be used by many different instructions.
Decided to generalise define_bypass so that it can handle filename-style
globs.
* Wrote a patch to model writeback in NEON.
* Wrote a patch to model writeback in core instructions. However,
while doing this, I noticed that the behaviour I'm seeing on our
Cortex-A8 doesn't match what I'd expected from GCC's A8 scheduler
description (or the documentation). Talked with Ramana about it.
Distilled a benchmark.
* These scheduler changes didn't improve the DENbench and libav
scores much by themselves, but the combination of the scheduler
and auto inc/dec changes did produce noticeable improvements
in some libav benchmarks and rather smaller improvements in
some DENbench ones.
== Next week ==
* Finish scheduler work, in light of observed behaviour.
* More testing prior to submission.
I'm away the week of 13th June.
Richard
Hi,
- bug fixes: PRs 49222, 49199, 49239, 49093
- widening multiplication: submitted a patch to support widen-mul for
unsigned types and constants in the vectorizer's pattern recognizer.
Now considering to move optimize_widening_mul pass before loop
optimizations and improve it to support unsigned and constants
Next week: holiday on Tuesday (half day) and Wednesday.
Ira
2011/5/29 Fathi Boudra <fathi.boudra(a)linaro.org>:
> Hi,
>
> The Linaro Team is pleased to announce the release of Linaro 11.05.
>
> 11.05 is the second public release that brings together the huge amount of
> engineering effort that has occurred within Linaro over the past 6 months.
>
> This is the first release delivering Android, Ubuntu and the Working Group
> components nicely bundled into one release. We will continue to pick up more
> Working Group and Landing Team outputs in the upcoming monthly releases.
>
> We encourage everybody to use the 11.05 release. The download links for all
> images and components are available on our release page:
>
> http://wiki.linaro.org/Cycles/1105/Final
>
> Highlights of this release:
>
> * Linaro GCC 4.5, GCC 4.6 and GDB 7.2 2011.05, recently released components
i have been wondering why always two versions are released at the same
time. what kind of users are expected to use 4.5, and what kind of
users are expected to use 4.6?
my another question is whether we have a policy to maintain old
realease. for example, in case1105 has some bugs, is it possible
linato toolchain team fix those bugs in the old version later. many
users are using old version with bugs, if they move to new version
directly, new feature maybe import new bugs. so people maybe want to
use old version with bug fixes, but without new features.
> created by the Toolchain Working Group.
> * Linaro Kernel 2011.05-2.6.38, the first source tarball release of Linux
> Linaro done by the Kernel Working Group.
> * Linaro Evaluation Builds (LEBs) for Android and Ubuntu on PandaBoard with
> 3D graphics acceleration.
> * Android cross toolchain based on latest gcc-linaro and gdb-linaro
> * Host development tools (cross compiler, image builders) readily integrated
> for the Ubuntu distribution users (Lucid, Maverick and Natty support).
> * And many more...
>
> Using the Android-based images
> ==============================
>
> The Android-based images come in three parts: system, userdata and boot.
> These need to be combined to form a complete Android install. For an
> explanation of how to do this please see:
>
> http://wiki.linaro.org/Platform/Android/ImageInstallation
>
> If you are interested in getting the source and building these images
> yourself please see the following pages:
>
> http://wiki.linaro.org/Platform/Android/GetSource
> http://wiki.linaro.org/Platform/Android/BuildSource
>
> Using the Ubuntu-based images
> =============================
>
> The Ubuntu-based images consist of two parts. The first part is a hardware
> pack, which can be found under the hwpacks directory and contains hardware
> specific packages (such as the kernel and bootloader). The second part is
> the rootfs, which is combined with the hardware pack to create a complete
> image. For more information on how to create an image please see:
>
> http://wiki.linaro.org/Platform/DevPlatform/Ubuntu/ImageInstallation
>
> Getting involved
> ================
>
> More information on Linaro can be found on our websites:
>
> * Homepage: http://www.linaro.org
> * Wiki: http://wiki.linaro.org
>
> Also subscribe to the important Linaro mailing lists and join our IRC
> channels to stay on top of Linaro developments:
>
> * Announcements:
> http://lists.linaro.org/mailman/listinfo/linaro-announce
> * Development:
> http://lists.linaro.org/mailman/listinfo/linaro-dev
> * IRC:
> #linaro on irc.linaro.org or irc.freenode.net
> #linaro-android irc.linaro.org or irc.freenode.net
>
> Known issues with this release
> ==============================
>
> For any errata issues, please see:
>
> http://wiki.linaro.org/Cycles/1105/Final#Known_Issues
>
> Bug reports for this release should be filed in Launchpad against the
> individual packages that are affected. If a suitable package cannot be
> identified, feel free to assign them to:
>
> http://www.launchpad.net/linaro
>
> Cheers,
>
> Fathi Boudra
> --
> Linaro Release Manager | Platform Project Manager
>
> _______________________________________________
> linaro-announce mailing list
> linaro-announce(a)lists.linaro.org
> http://lists.linaro.org/mailman/listinfo/linaro-announce
>
Hi,
* finished the measuring of the overhead of the ARM specific unwind tables
https://wiki.linaro.org/KenWerner/Sandbox/libunwind#overhead_of_the_ARM_spe…
* started to get an environment up and running in order to build the
linaro-android sources
* encountered some build issues (I'm in the process to sort out some
issue with pfalcon of the android team)
* finshed 11.11 cycle planning
* I'll be out of office for the rest of the week (public holiday +
vacation)
Regards
Ken
Progress:
* Some trouble building the SPEC2k tools in the new multiarch world in
natty. Perl refuses to link libm and a number of other things
also end up failing . Appears to be a real pain with the new multiarch
world and SPEC2k's curious build system for its' tools . Will fall back
to an older chroot and get the tools built natively.
* Tried breaking down the T2 performance blueprint - initial breakdown
now available.
* Looked at the binutils vmov.i64 issue again. Looks like natty-updates
will now pick this up.
* Some patch review and bugzilla maintenance.
Plans:
* Get SPEC tools building.
* Look more at the T2 performance blueprint
* Spend some time on the VFP moves and look at ivopts for a bit.
* Merge review duty.
Meetings:
* 1-1s
* Linaro calls.
