Author: Aaron Gordon
Date: 00:54:14 09/28/02
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On September 27, 2002 at 23:42:03, Robert Hyatt wrote: >On September 26, 2002 at 21:04:12, Aaron Gordon wrote: > >>Slate ran many tests, we managed to get the speedup with one CPU using the >>single-cpu binary vs dual cpu binary to 1.65x. Using one CPU in the dual cpu >>binary vs two cpus in the dual cpu binary was 1.69x. In the particular tests you >>are speaking of, was this the benchmark in crafty or some sort of test suite? >>Also, which binary did you use for the tests? If you didn't use one of >>mine or something very similar try going to http://speedycpu.dyndns.org/crafty/ >>and use one of the SMP binaries near the top. I'd like to see what sort of >>speedup you get. > > >I didn't run the SMP tests for AMD, I don't have a one here and have no plans >to get one. I posted a chart of data others provided. I don't even remember >which position we used now. All that was significant was that all the speedup >numbers (raw nps, not parallel search times) were in the 1.4-1.5 range with >AMD, and 1.8 and above for the intel boxes... > >I personally believe it highlights a memory bottleneck... Perhaps, but with my binaries the AMD systems get almost 1.7x & not 1.4-1.5. 1.7 to 1.8x speedup isn't a lot and with AMD cpus being faster I believe the dual systems will beat any dual P4. Even some results I saw on here placed a dual xeon 2.4 a little bit SLOWER than a single XP @ 2.52ghz. :)
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