This paper explains it pretty well:
http://www.open-mpi.org/papers/euro-pvmmpi-2006-hpc-protocols/
On Nov 2, 2006, at 1:37 PM, Brian Budge wrote:
Hi all -
I'm wondering how DMA is handled in OpenMPI when using the
infiniband protocol. In particular, will I get a speed gain if my
read/write buffers are already pinned via mlock?
Thanks,
Brian
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Jeff Squyres
Server Virtualization Business Unit
Cisco Systems
