[llvm-dev] greendragon build noisy due to mmap_stress.cc

Wed Jan 20 13:23:57 PST 2016

The test fails again:
http://lab.llvm.org:8080/green/job/clang-stage1-cmake-RA_check/9739/testReport/junit/ThreadSanitizer/ThreadSanitizer/mmap_stress_cc/
But unfortunately lit does not provide the original log, so we still don't
know why...

On Wed, Jan 13, 2016 at 1:11 PM, Chris Matthews <chris.matthews at apple.com>
wrote:

> These ran to completion without error. :(
>
> On Jan 12, 2016, at 3:23 PM, Chris Matthews <chris.matthews at apple.com>
> wrote:
>
> I’m running this on green-dragon-03 which is running OSX 10.10.5.
>
> /Users/buildslave/jenkins/sharedspace/clang-stage1-cmake-RA_workspace\@2/clang-build/bin/clang++
> ../llvm/projects/compiler-rt/test/tsan/mmap_stress.cc -lpthread
> while true; do for((i=0;i<10;i++)); do ./a.out || echo
> ===============FAILED================ & done ; wait; done
>
> Seems like it is getting about 225 runs a minute, so it will take about 8
> hours to complete 100k runs.
>
> On Jan 12, 2016, at 1:28 PM, Tobias Grosser via llvm-dev <
> llvm-dev at lists.llvm.org> wrote:
>
> On 01/12/2016 10:26 PM, Kostya Serebryany wrote:
>
> Hi Tobias,
>
> What machine is that?
> We have seen this and similar tests be flaky on older Linux kernels due
> to kernel bug(s).
> May I ask you to run the same test (just built with clang) on the same
> machine for ~100000 times and see if it ever crashes?
>
> clang++ ~/llvm/projects/compiler-rt/test/tsan/mmap_stress.cc -lpthread
> while true; do for((i=0;i<10;i++)); do ./a.out || echo
> ===============FAILED================ & done ; wait; done
>
>
> Add Michael again (who might have access to this Machine).
>
> Tobias
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> llvm-dev at lists.llvm.org
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>
>
>
>
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