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)? /Peter
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