[mpich-discuss] Merging stdout from multiple ranks

[Rob Latham]

On Tue, Apr 09, 2013 at 09:57:12AM -0500, Pavan Balaji wrote:
> Not when everything is dumped to the same output from mpiexec (e.g.,
> stdout), since that'll require an arbitrary amount of buffering at
> mpiexec to do that.  You could redirect the output to separate per-rank
> files.  mpiexec -help should give you information on that.

Oh man how did I not know that?  What is the correct
'-outfile-pattern' to use?    the -help doesn't tell you anything
about the "pattern language"

==rob

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