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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">Hi,<br>
<br>
we upgraded from mpich 3.1.2 to 3.2 and our nightly builds under valgrind show a new valgrind warning, which I suppose originates from the mpi library, rather than our code (given the stack trace below and the fact that they are absent with 3.1):<br>
<br>
There are two slightly distinct traces (alltoall and alltoallv):<br>
<br>
==30165== Conditional jump or move depends on uninitialised value(s)<br>
==30165== at 0x6E00056: MPIR_Process_status (mpiimpl.h:4394)<br>
==30165== by 0x6E00056: MPIC_Waitall (helper_fns.c:774)<br>
==30165== by 0x6D5A853: MPIR_Alltoall_intra (alltoall.c:369)<br>
==30165== by 0x6D5B63C: MPIR_Alltoall (alltoall.c:564)<br>
==30165== by 0x6D5B6EF: MPIR_Alltoall_impl (alltoall.c:599)<br>
==30165== by 0x6D5BF07: PMPI_Alltoall (alltoall.c:722)<br>
==30165== by 0x6AFF0DC: PMPI_ALLTOALL (alltoallf.c:276)<br>
==30165== by 0x1D04699: __message_passing_MOD_mp_alltoall_i22 <br>
<br>
==30201== Conditional jump or move depends on uninitialised value(s)<br>
==30201== at 0x6E00056: MPIR_Process_status (mpiimpl.h:4394)<br>
==30201== by 0x6E00056: MPIC_Waitall (helper_fns.c:774)<br>
==30201== by 0x6D5C4EA: MPIR_Alltoallv_intra (alltoallv.c:194)<br>
==30201== by 0x6D5CEC9: MPIR_Alltoallv (alltoallv.c:339)<br>
==30201== by 0x6D5CFAA: MPIR_Alltoallv_impl (alltoallv.c:376)<br>
==30201== by 0x6D5D8CA: PMPI_Alltoallv (alltoallv.c:527)<br>
==30201== by 0x6AFF13E: PMPI_ALLTOALLV (alltoallvf.c:276)<br>
==30201== by 0x1CCE180: __message_passing_MOD_mp_alltoall_z22v (message_passing_z.f90:223)<br>
<br>
Is this issue already known/fixed ?<br>
<br>
I saw there was a somewhat related change (which is part of 3.2):<br>
<br>
<a href="https://trac.mpich.org/projects/mpich/changeset/be7c17b3177ccb0ede49761b44a438952360b061" target="_blank">https://trac.mpich.org/projects/mpich/changeset/be7c17b3177ccb0ede49761b44a438952360b061</a><br>
<br>
but maybe that change was not fully complete ?<br>
<br>
Best regards,<br>
<br>
Joost VandeVondele<br>
<div><br>
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<div style="font-family:Tahoma; font-size:13px">
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Prof. Dr. Joost VandeVondele<br>
Nanoscale Simulations<br>
<br>
ETH Zurich <br>
HIT G 41.4<span style="font-family:monospace"><br>
</span>Wolfgang-Pauli-Strasse 27<br>
8093 Zurich, Switzerland <br>
<br>
Joost.VandeVondele@mat.ethz.ch<br>
<a href="http://www.nanosim.mat.ethz.ch/" tabindex="0">http://www.nanosim.mat.ethz.ch/</a><br>
Tel.: +41 (0)44 6338451<br>
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