On Wednesday, May 25, 2011 01:16:04 PM Andrew Senin wrote:
> Hello list,
> I have an application which uses MPI_Allgather with derived types. It works
> correctly with mpich2 and mvapich2. However it crashes periodically with
> openmpi2. After investigation I found that the crash takes place when I use
> derived datatypes with MPI_AllGather and number of ranks greater than 8.
Would 8 happen to be the number of cores you have per node so what we're
seeing is: single node OK, multi node FAIL?
If so what kind of inter node network are you (trying to) use(ing)?