[Beowulf] Intel Quad-Core or AMD Opteron

Greg Lindahl lindahl at pbm.com
Thu Aug 23 12:14:21 EDT 2007


On Thu, Aug 23, 2007 at 09:09:57AM -0400, Douglas Eadline wrote:

>    Naturally, if you have four processes running
>    it is best if each one gets its own woodcrest. To the OS
>    the all look the same. Other than Intel MPI, I don't
>    know of any other MPI that attempts to optimize this.

InfiniPath MPI has always optimized this. Of course, there's no way it
can read your mind and know if you are going to run a second 4-core
job on the same node, so there is no perfect default. But it has
switches to give you either behavior, tightly packed or spread out.

-- greg

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