mpiexec and # of prcoessors

[Bryan Putnam]

Dear mpiexec team,

I have a quick question regarding mpiexec-8.0 which we're using to run 
some benchmarks (HPL).

We've found that mpiexec works fine until we get to about 512+ nodes, and 
then the parallel job fails for various reasons. Is there an adjustable 
parameter in the mpiexec code that limits parallel jobs to 512 processors, 
or do you think the problem is likely not mpiexec related?

Thanks!
Bryan



Bryan Putnam                
Rosen Center for Advanced Computing, Purdue University
Young Hall (Rm. 519)
302 Wood Street
West Lafayette, IN 47907-2108     
Ph 765-496-8225 Fax 765-494-0566
bfp at purdue.edu