Crash with relatively small size

vatai / mpk

Matrix powers kernel

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Crash with relatively small size #23

Closed vatai closed 5 years ago

vatai commented 5 years ago

Crashes with these parameters

SIZE=200
NPART=16
NLEVEL=100
NPHASE=40

vatai commented 5 years ago

It's probably a memory issue. malloc (and MPI_Alloc_mem()) works well if there is only one process on one node, but MPI launches multiple processes. Made some small program here: https://github.com/vatai/thebench/tree/master/membreak

vatai commented 5 years ago

The problem was the use of too much memory.