Hello all,
When upgrading meta-linaro/meta-linaro-toolchain from daisy to fido, we faced drastic performance downgrade (-34.06%) on linux ipv4 forwarding. The board is ls1021atwr (ARM Cortex-A7 MPCore compliant with ARMv7-A architecture).
We did some investigation, and suspected that it is caused by the toolchain upgrade. Did someone meet similar issue?
The detailed toolchain info:
https://git.linaro.org/openembedded/meta-linaro.git/shortlog/refs/heads/fido
gcc-linaro-4.9.3-2015.03, glibc-linaro-2.20-2014.11, binutils-linaro-2.25-2015.01
https://git.linaro.org/openembedded/meta-linaro.git/shortlog/refs/heads/dai…
gcc-linaro-4.8.3-2014.04, eglibc-linaro-2.19-r2014.04, binutils-linaro-2.24-r2014.03
thanks.
-Ting
o Week 42 off (10/10)
== Progress ==
o Linaro GCC (9/10)
* Completed backports and reviews
* Delivered GCC 5 2015.10 snapshot
* Completed TCWG 389 (deploy snapshot job)
o Misc (1/10)
* Various meetings
== Plan ==
o Back to work
Mustang benchmarking bringup - (no ticket) [2/10]
Controlled Debian build - TCWG-360 [1/10]
* Constructed filesystem, works OK as chroot
* Next step is to boot it
Investigate Workload Automation framework - TCWG-361 [1/10]
* Seems to basically work
* SPEC support dubious
Misc
* LAVA uinstance background (TCWG-396, < 1/10)
* Noise control experiments (TCWG-358, < 1/10)
* ARM management duties [2/10]
== Progress ==
* Maintenance (5/10)
- Investigating some LivermoreLoops that don't vectorise
- Reducing cases to single specific causes
* Background (5/10)
- Code review, meetings, discussions, general support, etc.
- More code of conduct stuff, license change to Apache 2
- Following up on sanitizers VMA discussion
* Two days (Tue and Thu) off. [4/10]
# Progress #
* TCWG-180, patch is committed by Andrew Stubs. [1/10]
I review and approve it.
* Review patch set "all-stop on top of non-stop for remote". [3/10]
Test them on aarch64 and arm. Triage and fix one regression. Review
is still on going.
* Review patch set "ARM gdbserver software breakpoint". [2/10]
Review and approve them. They are preparatory to ARM tracepoint.
# Plan #
* Patch review.
* TCWG-387, Move GDB using libopcodes to decode instructions.
--
Yao
The Linaro Toolchain Working Group is pleased to announce the availability
of the Linaro Stable Binary Toolchain GCC 5.1-2015.08 Archives.
http://releases.linaro.org/components/toolchain/binaries/5.1-2015.08/
These archives provide cross-toolchain executables (compiler, debugger,
linker, etc.) and shared libraries (libstdc++, libc, etc.) that target ARM
or Aarch64 GNU/Linux and bare-metal environments. The cross-toolchain
binaries execute on a Linux or MS Windows (under mingw32) host
operating-system.
For bugs related to this release please email
linaro-toolchain(a)lists.linaro.org or file a bug at
https://bugs.linaro.org/enter_bug.cgi?product=Linux%20Binary%20toolchain
NEWS
* 2015.08
* The Linaro GCC 5.1 2015.08 binary toolchain release is based on the Linaro
GCC-5.1-2015.08 source archive release
<http://releases.linaro.org/components/toolchain/gcc-linaro/5.1-2015.08/>.
The major changes contained in 2015.08 over 2015.05 are described in the
sections below on 2015.08-rc1 and 2015.08-rc2 .
* 2015.08-rc2
* The Linaro 2015.08-rc2 release-candidate binary toolchain is based on
the Linaro GCC-5.1-2015.08-rc1 release-candidate source archive. The only
changes between 2015.08-rc1 and 2015.08-rc2 were the following changes in
how the binary toolchains were built. The compiler itself was not changed.
* x86_64 hosted, armv8l-linux-gnueabihf targetted cross toolchains are
now correctly configured. This was broken in 2015.08-rc1. The
cross-compiler targetting armv8l-linux-gnueabihf is now correctly
configured with --with-arch=armv8-a --with-fpu=neon-fp-armv8
--with-float=hard --disable-multilib --enable-multiarch.
* Glibc’s slibdir and libdir were once again modified to address
Linaro Bugzilla
1717 – Linaro-4.9-2015.05 moved system libs from /libc/lib/ to
/libc/usr/lib/ which breaks things. The following are now the correct
locations:
libdir=lib/ (linker-scripts and static archives)
slibdir=usr/lib/ (shared objects)
rtlddir=lib/ (dynamic linker)
* 2015.08-rc1
* x86_64 hosted, armv8l-linux-gnueabihf targetted cross toolchain now
provided.
Delivering on REQ-477 – Enable x86_64 to Aarch32 (32-bit ARMv8-A)
cross binary toolchain product release and CARD-1637 – Enable Aarch32
(32-bit ARMv8-A) cross binary toolchain product releases ,
armv8l-linux-gnueabihf targetted toolchains are now available as part of
this release-candidate.
* Python support in GDB for both Linux and Mingw32 (32-bit windows).
Delivered as requested in the linaro-toolchain mailing list post
title – windows binary builds with gdb-python enabled?.
* Added missing expat support to GDB.
This addresses the following linaro-toolchain mailing list post –
"Missing expat support in GDB 7.8 multi-lib enablement for arm bare-metal
targets."
* A fix for multilib enablement in baremetal toolchains (as described
in ABE Review 6862).
* Library Paths are now congruent with older Linaro Toolchain path
layouts. This addresses Linaro Bugzilla 1717 – Linaro-4.9-2015.05 moved
system libs from /libc/lib/ to /libc/usr/lib/ which breaks things.
libdir=lib/ (shared objects)
slibdir=usr/lib/ (static libraries)
rtlddir=lib/ (dynamic linker)
--
Ryan S. Arnold
Linaro Toolchain Working Group - Engineering Manager
www.linaro.org
Hi,
The default gcc version of Yocto 2.0(Jethro) is 5.2.0, the gcc version in meta-linaro is gcc-4.9.4, may I know if gcc-linaro-4.9.4 will be used for Yocto 2.0 release? when will the linaro gcc be upgraded to gcc-5.x?
BTW, can someone please help point out where the Linaro toolchain roadmap can be got?
Best Regards,
Zhenhua
== Progress ==
LLDB development
-- Verify LLDB watchpoints on Android Arm and AArch64 targets. [TCWG-405] [4/10]
- Ran LLDB testsuite on Nexus5, Nexus 7, Nexus S and Nexus 9 devices.
- Started into failing watchpoint tests on all devices.
-- Investigate and fix LLDB watchpoints tests that are failing on
Android Nexus 9 AArch64 target. [TCWG-405] [5/10]
- Debugging of ptrace watchpoint installation code.
- Prepared a fix and tested on Nexus 9.
Miscellaneous [1/10]
-- Meetings, emails, discussions etc.
== Plan ==
Further progress on investigating LLDB watchpoint issues on Android
Nexus devices.
Local testbots setup using new Android Nexus and Arm linux devices.
== Progress ==
* Libraries (3/10)
- Back investigating libc++ issues in AArch64 buildbot
- http://buildmaster.tcwglab.linaro.org/builders/clang-cmake-aarch64-prototype
- Trying to solve the rt/unw/c++ library entanglement in the driver
* Buildbots (1/10)
- Trying to perf an application on APM, but it crashed while
- Rebooted it for now, but on the list to migrate to a newer kernel
* Background (6/10)
- Code review, meetings, discussions, general support, etc.
- Laptop playing stupid again, lost a day trying to fix things
- New LLVM "code of conduct" sparked a huge discussion
