Author: Eugene Nalimov
Date: 12:31:46 08/09/03
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For your program, probably. But if you'll look at the official submitted SPEC2k results you can see that Opteron is not the fastest one. Official result for 2.0GHz Opteron is not there, but my (wild) guess is that it will be comparable with best submitted results, something like ~1300 SpecInt2k. So result should be comparable with *current* results for Itanium2 (http://www.spec.org/cpu2000/results/res2003q3/cpu2000-20030711-02389.html) and Intel Xeon (http://www.spec.org/cpu2000/results/res2003q3/cpu2000-20030630-02332.html). Good, but not spectacular. Thanks, Eugene On August 09, 2003 at 13:28:16, Gian-Carlo Pascutto wrote: >On August 07, 2003 at 15:08:29, Eugene Nalimov wrote: > >>Unfortunately, "clock per clock" rating methodology is wrong. > >It's only 'wrong' when you don't understand what is being talked >about. I don't have access to the latest and greatest of both the >Athlon, P4 and Opteron. I can do a clock for clock measurement on >the ones I _do_ have AND look at the fastest available clockspeed >for each CPU and base my conclusion on that. Which is exactly what >I have done. > >My conclusion is that the Opteron 2.0Ghz is faster than anything >else, even though the Pentium 4 runs at 3.2Ghz in its fastest >incarnation. > >The only problem with this measurement is that performance may >not scale linarly. For the things discussed here, it scales >linarly enough. > >>PS. I believe you did not provide another interesting data: speed of your >>program running *on the same CPU* when compiled with 32- and 64-bit compilers. >>AMD64 runs 32-bit applications natively with high speed (unlike Itaniums), so >>this way you can measure just effect of 64- vs. 32-bit data and 16 vs. 8 >>registers. > >As I already said, I didn't measure it because it is irrelevant for me. I >can run natively at 64 bits, no need for outdated 32 bit support. > >-- >GCP
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