Author: Matt Taylor
Date: 23:09:03 12/08/02
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On December 08, 2002 at 23:58:36, Robert Hyatt wrote: >On December 08, 2002 at 22:14:44, Jeremiah Penery wrote: > >>On December 08, 2002 at 21:24:52, Robert Hyatt wrote: >> >>>I also think that the numbers for the HT-enabled stuff might be wrong. The >>>node counts should vary, because to use HT, it is necessary to run the SMP >>>version of crafty and use mt=2 to use both logical processors. That will >>>produce variability in the total nodes searched that I didn't see in any of >>>the numbers displayed... >> >>All of Aaron's numbers were single-threaded Crafties. But Steffen posted a >>result with HT that used LESS total nodes than the single-threaded program, but >>only had a 13% speedup in terms of raw NPS. > > >OK. The only data I have to go on at the moment is my dual 2.8 xeon with >HT. I will try to run the benchmark tomorrow and post results. I have to be >at the office to do this as the only way I can turn SMT off is to reboot, >go into the BIOS setup and turn "logical cpu" off (Dell's syntax, not mine). > >I got a clean 33% faster in NPS. I didn't check the actual search times >very carefully but I will try to do so. > >I can run 1/2 cpus with SMT off, and 3/4 with SMT on, and compare both NPS >and raw time-to-solution times... Please post detailed results from as many permutations as you can. I'm interested in seeing how it changes. -Matt
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