- linaro-toolchain - lists.linaro.org

by Renato Golin

== Progress == * Libraries (1/10) - Working on getting the libc++ tests green * Maintenance (6/10) - Working with Vinicius on the gnueabi memcpy issue - More TargetTuple/TargetParser discussions - More sanitizers discussions, patch reviews * Background (3/10) - Code review, meetings, discussions, general support, etc. - Connect stuff == Plan == * Look a bit more on the library issues, try to upstream the bot changes * Check instability in SciMark2 * Change HD from a D01 * Continue discussion about the sanitizer's multiple VMA problem * Prepare for Connect, travel arrangements, etc.

10 years, 1 month

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[ACTIVITY] 07 Sep -- 11 Sep

by Yao Qi

# Progress # * TCWG-857, [7/10] One patch is upstreamed. The rest of them are in the queue. Upgrade juno board linux kernel to 4.2.0-rc4+ to test some multi-arch kernel patches. It isn't easy to run that new kernel on juno board, takes much time on this. * Misc [3/10]. Meetings, online trainings, etc. # Plan # * Continue to upstream multi-arch patches. * Some upstream patch reviews on tracepoint. -- Yao

10 years, 1 month

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help: cortex-a7 u-boot hang at pcie with gcc-linaro-4.9

by Liu Ting

Hello guys, I am newbie here and need your kindly help:) When trying to use gcc-linaro-4.9 to build u-boot for ls1021atwr (ARM Cortex-A7 MPCore compliant with ARMv7-A architecture), we face issue. U-boot hangs at PCI-E. After tracing the code, the issue is located at the line "*val = readl(addr);". u-boot/drivers/pci/pcie_layerscape.c: ls_pcie_read_config(): if (PCI_BUS(d) == hose->first_busno) { ... } else { ... if (PCI_BUS(d) == hose->first_busno + 1) { #PCI_BUS(d) 1, hose->first_busno 0 ls_pcie_cfg0_set_busdev(pcie, busdev); addr = pcie->va_cfg0 + (where & ~0x3); #pcie->va_cfg0 0x24000000, where 0xc } else { .... } } *val = readl(addr); The gcc source we used is gcc-linaro-4.9-2015.02.tar.xz<https://releases.linaro.org/15.02/components/toolchain/gcc-linaro/4.9/gcc-l…> (link<https://releases.linaro.org/15.02/components/toolchain/gcc-linaro/4.9/>) which is based on FSF GCC 4.9.3-pre+svn220525. Meanwhile, gcc-linaro-4.9-2015.01.tar.xz<https://releases.linaro.org/15.02/components/toolchain/gcc-linaro/4.9/gcc-l…> does not have this issue. After Bisecting, we tracked down a gcc commit: https://git.linaro.org/toolchain/gcc.git/commitdiff/e4f9e85e8152379aef37377… 2015-01-23 Jakub Jelinek <jakub(a)redhat.com> PR rtl-optimization/63637 PR rtl-optimization/60663 * cse.c (merge_equiv_classes): Set new_elt->cost to MAX_COST if elt->cost is MAX_COST for ASM_OPERANDS. (find_sets_in_insn): Fix up comment typo. (cse_insn): Don't set src_volatile for all non-volatile ASM_OPERANDS in PARALLELs, but just those with multiple outputs or with "memory" clobber. Set elt->cost to MAX_COST for ASM_OPERANDS in PARALLEL. Set src_elt->cost to MAX_COST if new_src is ASM_OPERANDS and elt->cost is MAX_COST. * gcc.dg/pr63637-1.c: New test. * gcc.dg/pr63637-2.c: New test. * gcc.dg/pr63637-3.c: New test. * gcc.dg/pr63637-4.c: New test. * gcc.dg/pr63637-5.c: New test. * gcc.dg/pr63637-6.c: New test. * gcc.target/i386/pr63637-1.c: New test. * gcc.target/i386/pr63637-2.c: New test. * gcc.target/i386/pr63637-3.c: New test. * gcc.target/i386/pr63637-4.c: New test. * gcc.target/i386/pr63637-5.c: New test. * gcc.target/i386/pr63637-6.c: New test. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_9-branch@220323 138bc75d<https://git.linaro.org/toolchain/gcc.git/object/138bc75d>-0d04-0410-961f-82ee72b054a4<https://git.linaro.org/toolchain/gcc.git/object/82ee72b054a4> Before this commit, u-boot can boot up. So any hint/suggestion? if more details needed, please feel free to tell us. Thank you in advance. -Ting

10 years, 1 month

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[ACTIVITY] 31 August - 4 September 2015

by Omair Javaid

== Progress == LLDB development -- Testing and bug fixing lldb on hikey AArch64 [TCWG-231] [4/10] -- Looking into multi-threaded watchpoint test failures on AArch64 highkey board. -- Fixed watchpoint installation lag and unexpected behaviour. Submitted http://reviews.llvm.org/D12522 -- Start work to add support for un-alinged watchpoints on AArch64 [TCWG-367] [3/10] Miscellaneous [3/10] -- Meetings, emails, discussions etc. -- Laptop LCD screen malfunctioned, found a temporary replacement. == Plan == LLDB development -- Progress towards un-allinged watchpoint support on AArch64 LLDB -- Fix broken parts of LLDB testsuite on AArch64.

10 years, 1 month

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[ACTIVITY] Week 36

by Yvan Roux

== Progress == o Linaro GCC validation (8/10) * Reviewed, validated and committed more backports * New stability issues after executor number increased * Started to script branch merge * Developed a new tool to avoid wasting time in gerrit/jenkins/logs navigation o Upstream GCC (1/10) * Looked at and updated some bugzillas o Misc (1/10) * Various meetings == Plan == o Continue backports/validation/branch merge

10 years, 1 month

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[ACTIVITY] 31th Aug - 04th Sep

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, 1 month

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[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, 1 month

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[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, 1 month

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[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, 1 month

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[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, 1 month

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[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

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[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

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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

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[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

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[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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[ACTIVITY] Week 3

by Yvan Roux

o 3 days off (6/10) == Progress == o Linaro GCC validation (3/10) * Reviewed, validated and committed on-going backports * backported more revisions o Misc (1/10) * Various meetings == Plan == o Continue backports/validation

10 years, 2 months

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[ACTIVITY] 24th - 28th August

by Kugan

== Progress == * Annual Leave (2/10) * Widening pass (TCWG-547) - 6/10 - Fixed all execution test failure. - bootstrap failure due to “Drop copy-rename” is still not resolved. Found a workaround. - Sorted debug_stmt handling * TACT 1/10 - Started looking to cross execution set-up * Misc - 1/10 - gcc-patches, gcc-bugs list == Plan == * Continue with widening pass

10 years, 2 months

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[activity] 24-49 August

by Prathamesh Kulkarni

== This Week == * TCWG-777 (3/10) - Fixed ICE with the patch - toolchain builds with the patch. - Sent patch to tcwg list for review - Investigating why combine fails to combine arm_andsi3_insn/arm_cmpsi_insn into zeroextractsi_compare0_scratch when the pass uses ud-chains to find def but works when def is found using ad-hoc way. * TCWG-871 (4/10) - Getting familiar with firefox build system - LTO build lto/non-lto on x86 and arm (doc) - Figuring out how to resolve "plugin needed to handle lto object" error. tried the following: binutils configured with: --enable-plugin, --enable-lto gcc configured with: --enable-lto --with-ld-plugin=<just built ld> Doesn't appear to work. * TCWG-835 (1/10) - Build failure with spec (PR67399) * Misc (2/10) - Meetings - Looked at rtl dataflow (df.h and df*.c) and ree.c == Next Week == Continue with TCWG-777, TCWG-835, TCWG-871

10 years, 2 months

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[Weekly] 24-28 AUGUST 2015

by Michael Collison

== This week == * TCWG-832 -Exploit vector multiply by scalar instructions when multiple scalars are used as coefficients in a loop (2/10) - Initial investigation. * TCWG-833 - Exploit Wide Add operations when appropriate (4/10) - Ramana is reviewing Aarch32 patch - Recoded Aarch64 support to use vect_select - Debugging Aarch64 lto, tree-dump regression suite failures * TCWG-834 - Use non-unit stride loads by preference when applicable (1/10) - TCWG 834 is Bugzilla 67323 upstream; Richard Biener took ownership as a vectorizer failure - My plan was to write a test case that failed until fixed, but Richard indicated this is not standard practice - Bugzilla 57195 (mode iterator bug) blocked compiling new pattern (1/10) - Separated patch from Bugzilla 67321 patch and sent upstream - Pinged upstream for comments - Bugzilla 67320 - Incorrect standard names for wide addition (1/10) - committed upstream in trunk * Misc (1/10) - Conference calls == Next week == - Resolve Aarch64 TCWG-833 patch, validate and upstream - Additional investigation into TCWG-832

10 years, 2 months

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[ACTIVITY] 24th - 28th August

by Charles Baylis

Bug 1764/PR67280 C++ wrong code bug (no card yet) [9/10] Misc [1/10]

10 years, 2 months

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[ACTIVITY] 17th - 21st August

by Charles Baylis

Holiday [2/10] Bug 1764/PR67280 C++ wrong code bug (no card yet) [4/10] Misc [4/10]

10 years, 2 months

1
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[ACTIVITY] 24th - 28th August

by Yao Qi

# Progress # * TCWG-857 [3/10] With one kernel fix, HW breakpoint works for unaligned address (2-byte aligned). Debug linux kernel with KGDB. KGDB exposes an existing GDB bug, I fixed it, but need some time thinking about how to submit it upstream. * TCWG-567, arm watchpoint fixes [4/10]. All fails are fixed, but need another round of test to confirm. ARM HW watchpoint doesn't work on 4.0.0 kernel, but I don't investigate on it. * TCWG-757 [2/10], some patches review. * Misc, meeting, [1/10] # Plan # * TCWG-857. * Upstream the leftover of aarch64 multi-arch patches. -- Yao

10 years, 2 months

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[ACTIVITY] Week 34

by Yvan Roux

== Progress == o Linaro GCC validation (9/10) * Analysed x86_64 fstack-protector and sse2 issue * This is due to "ulimit -v" usage which brakes asan testing and gcc testsuite caching mechanism. * Validation is now stable on Hetzner/Austin hardware * Documented summer validation issues * Validate and committed on-going backports o Upstream GCC (0/10) * Armeb OOM fix committed into gcc-5 o Misc (1/10) * Various meetings == Plan == o 3 days off o Continue backports/validation

10 years, 2 months

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[ACTIVITY] 17th - 21st August

by Kugan

== Progress == * Widening pass (TCWG-547) - 8/10 - Fixed all but one execution test failure. - aarch64 and x86 are clean - arm has one but this looks like a latent issue (in expand); looking into it - Latest trunk with aarch64 miscompiles stage2 fwprop (-fno-forwprop works). This happens with the commit 94f92c36a83d66a893c3bc6f00a038ba3dbe2a6f [PR64164] Drop copyrename, use coalescible partition as base when optimizing - Tried forcing the same promote_mode for x86_64 and can reproduce it with x86_64 also. - Looking into it to see if this is an error with the commit * Misc - 2/10 - gcc-patches, gcc-bugs list == Plan == - Continue with widening pass

10 years, 2 months

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[ACTIVITY] 17th - 21st August

by Bernie Ogden

Upcoming Absences * Away from this Wednesday until next Tuesday, inclusive Benchmark infrastructure - TCWG-360 [1/10] * Finished filling out cards/bugs for benchmarking work * Which makes the rest of this report more fine-grained Multinode wrapper - TCWG-888 [2/10] * Completed oversubscription workaround * Herded most tests through * Uncovered one significant bug, seems fixed Centralized source/results storage - TCWG-722 [1/10] * Wrote draft of source/results handling rules * Confirmed that old repos are subsets of new repos Noise control experiments - TCWG-897 [2/10] * Learned more about firmware, openembedded * Juno running a minimal filesystem, needs some tidying up Misc [4/10] * Including a further 1/10 of ARM management =Plan= * Herd remaining multinode tests through ** Depends on LAVA lab coming back from power cut ** And queues being short enough * Progress (finish?) Juno bring-up * Share source/results rules draft

10 years, 2 months

1
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