Interesting, MPI_Brecv is not in the standard (MPI_Bsend is). I don't
understand why a recv could not implemented with an external buffer.
Anyway, my bad, I was assuming MPI_Brecv was on. Thanks George for
pointing this out.
On Aug 27, 2008, at 7:14 AM, George Bosilca wrote:
What is the definition of a buffered receive ?
george.
On Aug 26, 2008, at 10:17 PM, Robert Kubrick wrote:
From a performance point of view, which one is better:
MPI_Battach(10*sizeof(MSG))
MPI_Brecv()
or
MPI_recv_init()
MPI_recv_init()
MPI_recv_init()
... /* 10 recv handlers */
MPI_Start(all recv)
MPI_Waitany()
I understand MPI_Brecv will require an extra message copy, from
the attached buffer to the MPI_Brecv() buffer. I'd like to know if
there other differences between the two methods.
Thanks,
Rob
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