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Subject: Re: [OMPI users] Performance: MPICH2 vs OpenMPI
From: Eugene Loh (Eugene.Loh_at_[hidden])
Date: 2008-10-24 13:56:24

Sangamesh B wrote:

> I reinstalled all softwares with -O3 optimization. Following are the
> performance numbers for a 4 process job on a single node:
> MPICH2: 26 m 54 s
> OpenMPI: 24 m 39 s

I'm not sure I'm following. OMPI is faster here, but is that a result
of MPICH2 slowing down? The original post at had:

OpenMPI - 25 m 39 s.
MPICH2 - 15 m 53 s.

So, did MPICH2 slow down, or can one not compare these timings?