[Beowulf] rhel page_size

Joe Landman landman at scalableinformatics.com
Fri Jan 22 14:49:13 EST 2010


Michael Di Domenico wrote:
> We'd like to run an experiment and see if MAGMA will run any
> faster/better/different with a larger page size.

Larger pages will reduce TLB thrashing/pressure.  The best way to tell 
if you need it is to run performance counter tools during your program 
run.  If you haven't, you might be optimizing something which provides 
minimal if any benefit.

Have you profiled the code (using any of the various tools) to see where 
it is spending its time?


-- 
Joseph Landman, Ph.D
Founder and CEO
Scalable Informatics Inc.
email: landman at scalableinformatics.com
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