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How do I control affinity when using OpenMPI and OpenMP on Power systems?    Point your RSS reader here for a feed of the latest messages in this thread


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Permlink Replies: 2 - Pages: 1 - Last Post: Apr 12, 2009 12:57 PM Last Post By: Michael84
billburos

Posts: 26
Registered: Oct 06, 2008 11:48:38 AM
How do I control affinity when using OpenMPI and OpenMP on Power systems?
Posted: Nov 04, 2008 09:54:10 AM
 
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Got a question from a customer on how to mix and match processor affinity when using OpenMPI processes across several systems with OpenMP threads under those individual processes.

It was noted that Linux on Power provides controls via numerous mechanisms, including numactl, taskset, and the IBM compiler "XLSMPOPTS" environment variable.
jon.thomas

Posts: 5
Registered: Aug 26, 2008 10:20:15 AM
Re: How do I control affinity when using OpenMPI and OpenMP on Power system
Posted: Dec 01, 2008 10:26:50 AM   in response to: billburos in response to: billburosthread.responsepost
 
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I'm not sure what you mean by "mix and match", but general info and usage on processor affinity in OpenMPI can be found following these links.

http://www.open-mpi.org/faq/?category=tuning#paffinity-defs
http://www.open-mpi.org/faq/?category=tuning#using-paffinity
Michael84

Posts: 2
Registered: Apr 12, 2009 12:53:35 PM
Re: How do I control affinity when using OpenMPI and OpenMP on Power system
Posted: Apr 12, 2009 12:57:43 PM   in response to: jon.thomas in response to: jon.thomasthread.responsepost
 
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