linaro-toolchain

linaro-toolchain@lists.linaro.org

3 participants
5657 discussions

by Kugan

== Progress == * Widening pass (TCWG-547) – 6/10 - Looked at “Error: unaligned opcodes detected in executable segment” * Spent lot of time trying to understand the root cause. * Got some suggestions from Jim and looking into it. - Posted some of the important patches for review. * https://gcc.gnu.org/ml/gcc-patches/2015-09/msg00399.html * https://bugs.linaro.org/show_bug.cgi?id=1318 (2/10) - Tried reproducing with the source provided without success. - Could build and reproduce with emacs-24.4 release. - Trunk GCC version 6.0.0 20150902 works. - GCC version 4.9.3 20150209 (Linaro GCC 4.9-2015.02) fails. * Misc - 2/10 - gcc-patches, gcc-bugs list == Plan == * Continue with widening pass * Fix Bug1318

10 years, 2 months

[ACTIVITY] 31st August - 4th September

by Bernie Ogden

Holiday [4/10] Multinode wrapper - TCWG-350 [2/10] * Merged to benchmarking branch, roughly documented * Tested & added job definition templates Setting up VPN [2/10] * Much struggling with mutt, pgp, VM vs real system, Mac vs Linux * Still not working, but wrote up what I've learned on the Collaborate page Misc [2/10] * ARM admin, meetings, mail, etc etc =Plan= Last pass through benchmarking presentation Finish multinode/updating benchmarking docs Back to Juno noise control experiments Back to Jenkins - get it to drive multinode

10 years, 2 months

[ACTIVITY] 24th - 28th August

by Bernie Ogden

(Reporting with new Jira numbers) Holiday [6/10] Investigate effectiveness of noise control - TCWG-358 [2/10] * Learned to build OE filesystems * Got Juno running with more or less provenance-tracked firmware, kernel, filesystem Misc - [2/10] * Pushed through some updates to benchmark sources * Struggled with Collaborate permissions to share source/results handling rules * Remaining multinode tests passed

10 years, 2 months

[Weekly] 31 AUGUST - 04 SEPTEMBER 2015

by Michael Collison

== This week == * TCWG-832 -Exploit vector multiply by scalar instructions when multiple scalars are used as coefficients in a loop (4/10) - Continued investigation. * TCWG-833 - Exploit Wide Add operations when appropriate (4/10) - Reworked Aarch64 patch to avoid redundant moves - Sent patch upstream for review - Debugging Aarch64 tree-dump regression suite failures - Bugzilla 57195 (mode iterator bug) blocked compiling new pattern (1/10) - Separated patch from Bugzilla 67321 patch and sent upstream - Pinged upstream for comments * Misc (1/10) - Conference calls == Next week == - USA Labor day holiday, September 7th - Additional investigation into TCWG-832

10 years, 2 months

[ACTIVITY] 31st August - 04 September 2015

by Prathamesh Kulkarni

== This Week == * TCWG-120 (8/10) - Resolved df issue in my patch, sent to tcwg list for review, - VRP makes the issue latent at -O2. Reproducible with -fno-tree-vrp - Taking another approach to run a "specialized" combine pass before combine pass that folds arm_andsi3_insn/arm_cmpsi_insn to zeroextracsi_compare0_scratch or andsi3_compare0_scratch without relying on combine. Patch: http://pastebin.com/gLVg7pbN Asm diff at -O1: http://pastebin.com/yXBHHkhM Asm diff at -O2 -fno-tree-vrp: http://pastebin.com/EKj6hXkt * Misc (2/10) - Meetings - Had a look at vect test-cases failing due to LTO == Issues == - No access to Juno - Can't login to IRC via ZNC (can connect directly). == Next Week == - Continue with TCWG-120 - Start looking at TCWG-80

10 years, 2 months

[ACTIVITY]

by Renato Golin

== Progress == * Holidays (4/10) * Buildbots (2/10) - Several breakages, Clang alignment issue sill breaking self-hosted bots... * Maintenance (2/10) - Backtracks on the TargetParser, code heavily modified, discussions ensued. - Helping Vinicius with __aeabi_memcpy in the kernel * Releases (0/10) - Release 3.7.0 final validated / uploaded - Waiting for final switch * Background (2/10) - Code review, meetings, discussions, etc. - Backlog of emails, reviews == Plan == Look at libc++ / RT / unwind again see if I can reduce the errors in both AArch64 and ARM to zero. == Issues == The power cuts and the effect it had on my buildbots made me spend 3 days of my holidays to fix. Other buildbot breakages made me spend another 2, and I couldn't wait until I was back, or it would have wasted an entire week (as it has happened before). In a nutshell, I can't have holidays. Yay!

10 years, 2 months

[ACTIVITY] 31th Aug - 04th Sep

by Yao Qi

# Progress # * Holiday on Monday [2/10] * TCWG-857, [4/10]. All the multi-arch work are done (I hope) but patches can't be sent out until kernel patches are pushed in upstream. ** Collect some arguments from kernel folks to defend my change "32-bit CPSR to 64-bit PSTATE". Patch is posted out. ** Finish the patch to convert siginfo_t between 32-bit debuggee and 64-bit debugger. Done. Will post it next week. ** Get right TLS base in multi-arch debugging. Patch is done. * Happen to see we can improve GDB performance in some case by avoid sending some packets. Patch is done, but need to collect some performance data. [2/10] * Misc [1/10] ** Close some tickets, TCWG-567, TCWG-876, as they are done. * TCWG-757 [1/10], many patches review. # Plan # * Continue to upstream multi-arch patches. * Upgrade my juno board kernel to git master to test kernel patches for multi-arch debugging work properly. * Collect some GDB performance data for my patch. -- Yao

10 years, 2 months

Odd Linaro GCC 4.8 2015.06 behavior with precompiled headers

by Dragan Stancevic

Hi- It seems that there is some discrepancy between Linaro GCC 4.8 2015.06 and Linaro GCC 4.8 2014.11 with regards to precompiled headers. It appears that 2015.06 doesn't even attempt to open the precompiled headers according to strace. I have been looking on gcc mailing list but have not been able to find any fixes related to precompiled headers. Does anyone have any pointers as to what should I be looking at to get to the bottom of this issue? This simple program compiles without any problems on 2014.11, but fails on 2015.06 because 2015.06 doesn't even attempt to read tst.h.gch created by "make header" dragans@tst:~$ cat Makefile PROJ=tst CC=arm-linux-gcc LD=arm-linux-ld all: header $(PROJ) header: $(PROJ)._ cp $(PROJ)._ $(PROJ).h $(CC) -x c-header -c $(PROJ).h $(PROJ): $(RM) $(PROJ).h $(CC) $(PROJ).c -o $(PROJ) clean: $(RM) $(PROJ).h.gch $(PROJ).h $(PROJ) dragans@tst:~$ cat tst._ #include <stdio.h> dragans@tst:~$ cat tst.c #include "tst.h" int main(int argc, char**argv) { char *s = "Test"; printf("%s\n", s); return 0; }

10 years, 2 months

[ACTIVITY] 24 - 28 August 2015

by Omair Javaid

== Progress == LLDB development -- Testing and bug fixing lldb on hikey AArch64 [TCWG-886] [7/10] -- Improve error handling of AArch64 watchpoint code. Submitted, got reviewed and committed http://reviews.llvm.org/D12328 -- Looked into ways to improve watchpoint installation lag. -- Looked into issues pertaining to un-alligned watchpoints installation. -- Committed upstream arm hardware breakpoint and watchpoint support [TCWG-770] [TCWG-794] [1/10] -- Ran lldb testsuite in various combinations to figure out Arm and AArch64 status [1/10] -- Testing on chromebook with precise chroot works. Miscellaneous [1/10] -- Meetings, emails, discussions etc. == Plan == LLDB development -- Try to find ways to debug lldb-server platform forked gdbserver instance. -- Test, debug and fix testsuite failures on Arm and AArch64.

10 years, 2 months

[ACTIVITY] 17 - 21 August 2015

by Omair Javaid

== Progress == LLDB development -- Testing and bug fixing lldb on hikey AArch64 [TCWG-886] [2/10] -- Looked into watchpoint tests which are still failing after committing watchpoint support and bug fixes. -- Modifications to arm hardware breakpoint and watchpoint support [TCWG-770] [TCWG-794] [7/10] -- Resubmitted the pending patch http://reviews.llvm.org/D9703 -- Testing on chromebook with precise chroot works. Miscellaneous [1/10] -- Meetings, emails, discussions etc. -- Looking into slow data transfer issues on chromebook and highkey board == Plan == LLDB development -- Get patches reviewed and committ them. -- Continue looking into tests which are still failing on Arm and AArch64 -- Run test comparison between linux x86, android arm and linux arm

10 years, 2 months

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linaro-toolchain