Author: Eugene Nalimov
Date: 13:12:25 01/20/01
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On January 20, 2001 at 16:01:46, Robert Hyatt wrote: >On January 20, 2001 at 15:39:02, Joshua Lee wrote: > >>How fast is crafty on a 800Mhz PIII? AMD Athlon at 800Mhz? I don't know about >>the Alpha too much which CPU speeds do they offer for comparison? Would a Dual >>or Quad Xenon or Athlon compare with a Single Alpha ? Thanks > >Here is the output for running WAC at 60 seconds per move on a single xeon cpu, >700mhz, 1M L2 cache: >test results summary: > >total positions searched.......... 300 >number right...................... 299 >number wrong...................... 1 >percentage right.................. 99 >percentage wrong.................. 0 >total nodes searched.............. 132559227.0 >average search depth.............. 4.7 >nodes per second.................. 412161 > > > >Here is the same test run on a 21264 alpha at 600mhz: > >test results summary: > >total positions searched.......... 300 >number right...................... 300 >number wrong...................... 0 >percentage right.................. 100 >percentage wrong.................. 0 >total nodes searched.............. 236973211.0 >average search depth.............. 4.5 >nodes per second.................. 783641 > >As you can see, the alpha has a 16% slower clock speed, but is nearly 2x >faster... > >Bob I believe that part of the explanation is the compiler. You are using obsolete GNU compiler on the x86, but state-of-the-art compiler on Alpha. Good x86 C compiler will give you at least additional 20%. Eugene
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