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segfault with MPICH + UCX 1.6.0 and malloc hooks #3831

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raffenet opened this issue Jul 4, 2019 · 3 comments · Fixed by #3836
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segfault with MPICH + UCX 1.6.0 and malloc hooks #3831

raffenet opened this issue Jul 4, 2019 · 3 comments · Fixed by #3836
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@raffenet
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raffenet commented Jul 4, 2019

How to reproduce:
MPICH master: https://github.com/pmodels/mpich

./autogen.sh
./configure --with-device=ch4:ucx --with-ch4-netmod-ucx-args=am-only --enable-g=dbg --disable-fast --with-ucx=<path/to/ucx-1.6.0> --prefix=<path/to/install>
make -j install
cd test/mpi/threads/pt2pt
make multisend2
mpiexec -n 4 ./multisend2

Segfaults go away if malloc hooks are disabled with UCX_MEM_EVENTS=n.
@hoopoepg
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hoopoepg commented Jul 4, 2019

@raffenet could you copy backtrace here?
thank you

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raffenet commented Jul 4, 2019

backtrace.txt

@hoopoepg hoopoepg mentioned this issue Jul 5, 2019
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hoopoepg commented Jul 5, 2019

hi @raffenet
could you try to test this PR: #3836

thank you

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UCM: added madvise into VM_UNMAP events group hoopoepg/ucx
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