Author: Dann Corbit
Date: 12:27:32 09/11/02
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On September 11, 2002 at 15:10:49, Gian-Carlo Pascutto wrote: [snip] >>2. That there is definitely a linear improvement in new CPUs and 64 CPUs is >>almost exactly twice as good as 32 CPUs. I think that is pretty astonishing, >>and so however it is that communication happens between nodes should be tried >>in other systems. > >It's a natural consequence of the fact that they have (almost) no >synchronisation costs. Well, that's pretty interesting, isn't it? Can the same model be copied to other algorithms? Surely they have to coordinate the information from the entire set of processors somehow. The processors cannot be purely independent of one another or no resolution would be reached. If a similar speedup could be obtained with another scheme, it might be very valuable. Also, since they have done a test with 64 CPUs, I assume that they are using some sort of NUMA architecture, since there are not many 64 CPU SMP systems around. Hence, it might scale to stupendous CPU counts like the DoD supercomputers with thousands of CPUs. If if the efficiency is 1%, if you have 10000 CPUs you will be at 100x the speed of a single CPU system. Maybe no other system can match that.
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