Saliya,
OpenMPI uses btl for point to point communication, and automatically
selects the best one per pair.
Typically, the openib or tcp btl is used for inter node communication,
and the sm or vader btl for
intra node.
note the vader btl uses the knem kernel module when available for even
more optimized configurations.
Cheers,
Gilles
On 9/1/2015 5:59 AM, Saliya Ekanayake wrote:
Hi,
Just trying to see if there are any optimizations (or options) in
OpenMPI to improve communication between intra node processes. For
example do they use something like shared memory?
Thank you,
Saliya
--
Saliya Ekanayake
Ph.D. Candidate | Research Assistant
School of Informatics and Computing | Digital Science Center
Indiana University, Bloomington
Cell 812-391-4914
http://saliya.org
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