[compiler-rt] r231367 - tsan: fix signal handling during stop-the-world

Tue Mar 24 17:36:28 PDT 2015

Thanks!

On Tue, Mar 24, 2015 at 3:26 PM, Galina Kistanova <
gkistanova at accesssoftek.com> wrote:

>   I reduced number of threads for build to 32 and rebooted the box. Hope
> this will help.
>
>
>
> Thanks
>
>
>
> Galina
>
>
>
>
>  ------------------------------
>
> *From:* Kostya Serebryany [mailto:kcc at google.com]
> *Sent:* Tuesday, March 24, 2015 1:00 PM
> *To:* Galina Kistanova
> *Cc:* Hans Wennborg; David Blaikie; llvm-commits at cs.uiuc.edu
>
> *Subject:* Re: [compiler-rt] r231367 - tsan: fix signal handling during
> stop-the-world
>
>
>
> The bot is very heavily loaded, it has 40+ processes running since March 1:
>
>
>
> 41500 buildsl+  20   0 1208380 1.040g   1044 R 100.0  2.2  17567:12
> clang-3.7
>
>
> 41534 buildsl+  20   0  347420 246492    976 R 100.0  0.5  18093:57
> clang-3.7
>
>
> 41438 buildsl+  20   0  535216 427720   1020 R 100.0  0.9  17862:52
> clang-3.7
>
>
> 41364 buildsl+  20   0  538920 427928   1132 R  99.6  0.9  17835:58
> clang-3.7
>
>
> 41400 buildsl+  20   0  481600 374952   1044 R  99.0  0.8  17961:05
> clang-3.7
>
>
>
> buildsl+ 41534 55.0  0.4 347420 246500 ?       R    Mar01 18094:29
> /home/buildslave/slave_as-bldslv8/clang-x86_64-linux-selfhost-abi-test/stage1.install/bin/clang-3.7
> -cc1 -triple x86_64-unknown-linux-gnu -emit-obj -disable-free
> -main-file-name Errno.cpp -mrelocation-model pic -pic-level 2
> -mthread-model posix -fmath-errno -masm-verbose -mconstructor-aliases
> -munwind-tables -fuse-init-array -target-cpu x86-64
> -momit-leaf-frame-pointer -dwarf-column-info -ffunction-sections
> -fdata-sections -coverage-file
> /home/buildslave/slave_as-bldslv8/clang-x86_64-linux-selfhost-abi-test/stage2/lib/Support/CMakeFiles/LLVMSupport.dir/Errno.cpp.o
> -resource-dir
> /home/buildslave/slave_as-bldslv8/clang-x86_64-linux-selfhost-abi-test/stage1.install/bin/../lib/clang/3.7.0
> -dependency-file lib/Support/CMakeFiles/LLVMSupport.dir/Errno.cpp.o.d -MT
> lib/Support/CMakeFiles/LLVMSupport.dir/Errno.cpp.o -D GTEST_HAS_RTTI=0 -D
> _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D
> __STDC_LIMIT_MACROS -U NDEBUG -I lib/Support -I
> /home/buildslave/slave_as-bldslv8/clang-x86_64-linux-selfhost-abi-test/llvm/lib/Support
> -I include -I
> /home/buildslave/slave_as-bldslv8/clang-x86_64-linux-selfhost-abi-test/llvm/include
> -internal-isystem
> /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8
> -internal-isystem
> /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/x86_64-linux-gnu/c++/4.8
> -internal-isystem
> /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/x86_64-linux-gnu/c++/4.8
> -internal-isystem
> /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/backward
> -internal-isystem /usr/local/include -internal-isystem
> /home/buildslave/slave_as-bldslv8/clang-x86_64-linux-selfhost-abi-test/stage1.install/bin/../lib/clang/3.7.0/include
> -internal-externc-isystem /usr/include/x86_64-linux-gnu
> -internal-externc-isystem /include -internal-externc-isystem /usr/include
> -O3 -Wall -W -Wno-unused-parameter -Wwrite-strings -Wcast-qual
> -Wmissing-field-initializers -Wno-long-long -Wcovered-switch-default
> -Wnon-virtual-dtor -pedantic -std=c++11 -fdeprecated-macro
> -fdebug-compilation-dir
> /home/buildslave/slave_as-bldslv8/clang-x86_64-linux-selfhost-abi-test/stage2
> -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden
> -mstackrealign -fno-rtti -fobjc-runtime=gcc -fdiagnostics-show-option
> -fcolor-diagnostics -vectorize-loops -vectorize-slp -o
> lib/Support/CMakeFiles/LLVMSupport.dir/Errno.cpp.o -x c++
> /home/buildslave/slave_as-bldslv8/clang-x86_64-linux-selfhost-abi-test/llvm/lib/Support/Errno.cpp
>
>
>
> I would expect that rebooting the bot will resolve the flakiness.
>
>
>
> On Mon, Mar 23, 2015 at 1:26 PM, Kostya Serebryany <kcc at google.com> wrote:
>
>
>
>
>
> On Fri, Mar 20, 2015 at 9:59 AM, Galina Kistanova <
> gkistanova at accesssoftek.com> wrote:
>
> Sure I can set you up with the access. That's one of the purposes of
> having the bots in the lab.
>
> Just tell me what you are going to do there, so I could figure out the
> permissions, and when you will be accessing it, so I would stop the builder.
>
>
>
> I will need the machine to build and run a single C++ test,
>
> so all I need is the access to the clang binary built on this builder
>
> and an ability to compile a test  using that clang.
>
> No need to stop the builder.
>
>
> Please also send me directly the ssh key you will be using.
>
>
>
> ok!
>
>
>
>
> Thank you
>
> Galina
>
>
>
> -----Original Message-----
> From: hwennborg at google.com [mailto:hwennborg at google.com] On Behalf Of
> Hans Wennborg
> Sent: Thursday, March 19, 2015 1:43 PM
> To: David Blaikie
> Cc: Kostya Serebryany; Galina Kistanova; llvm-commits at cs.uiuc.edu
> Subject: Re: [compiler-rt] r231367 - tsan: fix signal handling during
> stop-the-world
>
> I'm hitting this when running 'ninja check-all' on my machine.
>
> If I just run the individual run line, it doesn't crash though.
>
> On Mon, Mar 16, 2015 at 11:37 AM, David Blaikie <dblaikie at gmail.com>
> wrote:
> > Not my bot (& I seem to have lost my local reproduction - it was failing
> > pretty consistently for me last week - perhaps my machine instnalled a
> > software update in the interim), +Galina who might have some more info
> about
> > as-bldslv8.
> >
> > On Mon, Mar 16, 2015 at 11:34 AM, Kostya Serebryany <kcc at google.com>
> wrote:
> >>
> >>
> >>
> >> On Sun, Mar 15, 2015 at 12:34 AM, Dmitry Vyukov <dvyukov at google.com>
> >> wrote:
> >>>
> >>> On Sun, Mar 15, 2015 at 12:32 AM, David Blaikie <dblaikie at gmail.com>
> >>> wrote:
> >>> >> Added:
> >>> >>     compiler-rt/trunk/test/asan/TestCases/Linux/leak_check_segv.cc
> >>> >>
> >>> >>
> >>> >>
> compiler-rt/trunk/test/asan/TestCases/Linux/signal_during_stop_the_world.cc
> >>> >>
> >>> >>
> >>> >>
> compiler-rt/trunk/test/sanitizer_common/TestCases/Linux/signal_segv_handler.cc
> >>> >
> >>> >
> >>> > This test appears to be flaky. Failing every second run here:
> >>> >
> >>> >
> http://lab.llvm.org:8011/builders/clang-x86_64-linux-selfhost-abi-test/builds/2871
> >>> > and failing for me locally.
> >>>
> >>>
> >>> The test does not fail for a bunch of us locally (I run it 5000 times
> >>> locally).
> >>> Can you please run it locally _without_ any tool? Does it fail?
> >>
> >>
> >> Yea, we tried reproducing it on multiple machines with no luck.
> >> Can we have access to the bot?
>
>
>
>
>
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