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Subject: Re: [OMPI users] slowdown with infiniband and latest CentOS kernel
From: Ake Sandgren (ake.sandgren_at_[hidden])
Date: 2013-12-18 16:25:22


On Wed, 2013-12-18 at 11:47 -0500, Noam Bernstein wrote:
> Yes - I never characterized it fully, but we attached with gdb to every
> single vasp running process, and all were stuck in the same
> call to MPI_allreduce() every time. It's only happening on a rather large
> jobs, so it's not the easiest setup to debug.

That sounds like one of the bugs i found i VASP.
Could you send me the input data that triggers this (with info on how it
was run, i.e. #mpi-tasks etc) and i can check if our heavily fixed
version hits it.

/Ã…ke S.