Author: Vincent Diepeveen
Date: 17:29:11 12/30/02
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On December 30, 2002 at 19:39:23, Frank Koenig wrote: >Two questions. > >One) Will Intel's HT technology be able to help chess programs above and beyond >just allowing one CPU to appear as two? > >Second) If you are running XP, will HT require XP Pro instead of XP Home to take >advantage of it? > >Thanks, > >Frank For dual machines you need even newer releases of OSes to still get released. However you can profit from it in a very limited way. It's a speedup of 18% for DIEP at the latest P4 (3.06Ghz), at older P4s the profit is less (like P4 Xeon 2.8Ghz) and even older P4s the profit is zero or negative. So it's progressing but the P4 is a processor not really mature enough: too little trace cache and too little datacache: just 1024 quadwords; compare with the 64KB L1 data cache of a K7 which is i guess 16384 doublewords. It's already having a very small L1 cache and trace cache compared to the L1 of the K7 (128KB) and now you have to divide that by 2 again. So that isn't very positive yet. Let's wait for the future if we can see bigger profits. In which case it gets very interesting of course.
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