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Wow. I guess you aren't familiar with the history of large SGI Origin and Altix machines being mostly used as pure MPI machines because that's almost always fas
by greglindahl 9y ago
Wow. I guess you aren't familiar with the history of large SGI Origin and Altix machines being mostly used as pure MPI machines because that's almost always fastest? Also, Linpack doesn't involve much data motion. Also, moving data over a shared memory interconnect is as much of a copy as moving data over a message passing interconnect.
I was going to look up the current details for you, but I don't see an SGI Ultraviolet system in the current Top500. How large of a machine do you work with?
- openasocket 9y agoI was thinking about machines with a shared memory bus (I'm 90% sure that's the right term) so yeah not things in the Top500. I'm thinking about your standard 64-core servers. I know that in the large MPI is best because getting that many cores to use the same memory bus just isn't feasible. Sorry for the confusion, I didn't read your comment carefully.