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Subject: [OMPI users] valgrind problems
From: Justin (luitjens_at_[hidden])
Date: 2009-02-26 19:03:38


Hi,

I'm trying to use valgrind to check if we have any memory problems in
our code when running with parallel processors. However, when I run
using mpi and valgrind I crashes in various places. For example some of
the times it will crash with a segfault within MPI_Allgatherv despite
the fact that all the arguments to the all gather on all processors is
completely valid. If we don't use valgrind the program runs just fine.

This is on a Debian(lenny) 64 bit machine using the stock mpi package.
The command used to launch the job is: mpirun -np 8 valgrind -v
--log-file=valgrind.%p executable. Are valgrind and openmpi
compatible? Is there any special tricks to getting them to work together?

Thanks,
Justin