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Subject: Re: [OMPI users] MPI_Allreduce on local machine
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2010-07-28 07:50:35

On Jul 27, 2010, at 11:21 AM, Hugo Gagnon wrote:

> I appreciate your replies but my question has to do with the function
> MPI_Allreduce of OpenMPI built on a Mac OSX 10.6 with ifort (intel
> fortran compiler).

The implication I was going for was that if you were using MPI_DOUBLE_PRECISION with a data buffer that wasn't actually double precision, Bad Things would happen inside the allreduce because OMPI would likely read/write beyond the end of your buffer.

Jeff Squyres
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