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Subject: Re: [OMPI users] Does MPI_Bsend always use the buffer?
From: Gleb Natapov (glebn_at_[hidden])
Date: 2007-12-11 10:33:38

On Tue, Dec 11, 2007 at 10:27:32AM -0500, Bradley, Peter C. (MIS/CFD) wrote:
> In OpenMPI, does MPI_Bsend always copy the message to the user-specified
> buffer, or will it avoid the copy in situations where it knows the send can
> complete?
If the message size if smaller than eager limit Open MPI will not use
user-specified buffer for it.