Hi Mark,
At 17:25 23.06.2008, Mark Hahn wrote:
5) In which cases is it reasonable to switch on
"Node memory interleaving" (in BIOS) for the
application which uses more memory than is presented on the node ?
I leave it off, since numactl --interleave lets
you get the same effect from user-space. I'm
not sure I've ever seen it be a win.
numactl --interleave will for sure use (at least)
page resolution performing the interleave. In my
fantasy, I imagine the hardware interleave to be
on a cache-line boundary. If that is the case,
you might see differences though, for example if
the threads/processes tend to generate cache
misses to a single page, but different lines
within that page. Probably an unlikely scenario for real applications...
Håkon
_______________________________________________
Beowulf mailing list, Beowulf@beowulf.org
To change your subscription (digest mode or unsubscribe) visit
http://www.beowulf.org/mailman/listinfo/beowulf
