On Wed, Jun 13, 2007 at 07:02:10PM -0400, Douglas Eadline wrote: > So this begs the question, if we are "core rich and packet small" > do we care about packet size and overhead?
That's not quite the question. In many programs, there is no possible overlap between communication and computation, so they don't care how high the overhead is, although for smaller messages lower overhead can mean higher bandwidth (that "message rate" thing, again.) If you can overlap, then you do care about overhead, especially for Ethernet, where the cpu overhead is often unequally distributed over your cores. -- greg _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf