Author: Georg v. Zimmermann
Date: 13:23:17 12/03/03
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Very impressive (but I must say I find the # solutions even more impressive than the n/s). What clock speed are those Opterons running at ? What effective speedup do you get from those 4CPUs over 1 ? Thanks, Georg On December 03, 2003 at 14:59:03, Robert Hyatt wrote: >The other day, someone was discussing WAC. As I have been working on the >quad-opteron machine at AMD, I took some time to run WAC three times, one >for 1 second per position, one for 5 and one for 10. The results: > >===================== 1 seconds per position======================== >test results summary: > >total positions searched.......... 300 >number right...................... 297 >number wrong...................... 3 >percentage right.................. 99 >percentage wrong.................. 1 >total nodes searched.............. 111851199 >average search depth.............. 4.5 >nodes per second.................. 6072269 > >===================== 5 seconds per position======================== >test results summary: > >total positions searched.......... 300 >number right...................... 298 >number wrong...................... 2 >percentage right.................. 99 >percentage wrong.................. 0 >total nodes searched.............. 320786849 >average search depth.............. 5.6 >nodes per second.................. 6299702 > >=====================10 seconds per position======================== >test results summary: > >total positions searched.......... 300 >number right...................... 299 >number wrong...................... 1 >percentage right.................. 99 >percentage wrong.................. 0 >total nodes searched.............. 259379471 >average search depth.............. 4.6 >nodes per second.................. 6369720 > >Benchmark: > >Crafty v19.7 (4 cpus) > >White(1): mt=4 >max threads set to 4 >White(1): bench >Running benchmark. . . >...... >Total nodes: 109241860 >Raw nodes per second: 6068992 >Total elapsed time: 18 >SMP time-to-ply measurement: 35.555556 >White(1): > >That now includes the inline FirstOne()/LastOne()/PopCnt() 64 bit code I >wrote. It is about 4-5% faster. I have not written the attack stuff yet >but I suppose I might bite the bullet to see what happens...
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