[mpich-discuss] valgrind warning in MPIR_Process_status

[Jeff Hammond]

I think this is the same issue reported on the devel list yesterday. If it
is, Daniel Ibanez provided a patch that I've merged into my (completely
unofficial fork on github) and will push to the official MPICH review repo
tonight.

If you want to try and/or verify Daniel's patch, see
github/jeffhammond/mpich. The branch you want should be obvious from the
name (I can't remember what it is off hand).

Best,

Jeff

On Sunday, January 10, 2016, VandeVondele Joost <
joost.vandevondele at mat.ethz.ch> wrote:

> Hi,
>
> 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):
>
> There are two slightly distinct traces (alltoall and alltoallv):
>
> ==30165== Conditional jump or move depends on uninitialised value(s)
> ==30165==    at 0x6E00056: MPIR_Process_status (mpiimpl.h:4394)
> ==30165==    by 0x6E00056: MPIC_Waitall (helper_fns.c:774)
> ==30165==    by 0x6D5A853: MPIR_Alltoall_intra (alltoall.c:369)
> ==30165==    by 0x6D5B63C: MPIR_Alltoall (alltoall.c:564)
> ==30165==    by 0x6D5B6EF: MPIR_Alltoall_impl (alltoall.c:599)
> ==30165==    by 0x6D5BF07: PMPI_Alltoall (alltoall.c:722)
> ==30165==    by 0x6AFF0DC: PMPI_ALLTOALL (alltoallf.c:276)
> ==30165==    by 0x1D04699: __message_passing_MOD_mp_alltoall_i22
>
> ==30201== Conditional jump or move depends on uninitialised value(s)
> ==30201==    at 0x6E00056: MPIR_Process_status (mpiimpl.h:4394)
> ==30201==    by 0x6E00056: MPIC_Waitall (helper_fns.c:774)
> ==30201==    by 0x6D5C4EA: MPIR_Alltoallv_intra (alltoallv.c:194)
> ==30201==    by 0x6D5CEC9: MPIR_Alltoallv (alltoallv.c:339)
> ==30201==    by 0x6D5CFAA: MPIR_Alltoallv_impl (alltoallv.c:376)
> ==30201==    by 0x6D5D8CA: PMPI_Alltoallv (alltoallv.c:527)
> ==30201==    by 0x6AFF13E: PMPI_ALLTOALLV (alltoallvf.c:276)
> ==30201==    by 0x1CCE180: __message_passing_MOD_mp_alltoall_z22v
> (message_passing_z.f90:223)
>
> Is this issue already known/fixed ?
>
> I saw there was a somewhat related change (which is part of 3.2):
>
>
> https://trac.mpich.org/projects/mpich/changeset/be7c17b3177ccb0ede49761b44a438952360b061
>
> but maybe that change was not fully complete ?
>
> Best regards,
>
> Joost VandeVondele
>
> ------------------------------
> Prof. Dr. Joost VandeVondele
> Nanoscale Simulations
>
> ETH Zurich
> HIT G 41.4
> Wolfgang-Pauli-Strasse 27
> 8093 Zurich, Switzerland
>
> Joost.VandeVondele at mat.ethz.ch
> <javascript:_e(%7B%7D,'cvml','Joost.VandeVondele at mat.ethz.ch');>
> http://www.nanosim.mat.ethz.ch/
> Tel.: +41 (0)44 6338451
> ------------------------------
>


-- 
Jeff Hammond
jeff.science at gmail.com
http://jeffhammond.github.io/
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