[Darshan-users] LD_PRELOAD fails with OpenMPI

Rob Latham robl at mcs.anl.gov
Thu Jan 3 14:15:20 CST 2013

On Thu, Jan 03, 2013 at 03:12:25PM -0500, Phil Carns wrote:
> Our best bet might be to provide a patch to the Open MPI team that
> converts those stat() calls into access() calls.  Darshan does not
> intercept access() calls, and the Open MPI code doesn't really need
> the results of the stat operation.  They are just checking for the
> existence of particular files.

ooh, easy pitch: access() is probably lighter weight and more scalable
than stat()

Rob Latham
Mathematics and Computer Science Division
Argonne National Lab, IL USA

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