Author: Vincent Diepeveen
Date: 14:39:42 03/04/03
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On March 04, 2003 at 16:32:33, Jay-R Delacruz wrote: >Do the deep versions of Fritz, Junior and Shredder support hyper-thread? Can >someone please tell me before upgrading my PC to try the deep versions? I just read email from Frans Morsch. DeepFritz7 gets 5-10% speedup by hyperthreading. Shredder gets more speedup in nodes a second than that, but it gets no speedup from it as it gets SMP already a far smaller speedup (1.5 or so), so it is smarter to turn SMT/HT off for it. perhaps shredder8 will fix this. For diep it speeds me up about 11% in NPS but i cannot garantuee that at a 4 processor it will give a positive speedup. When running 2 processes at a P4 at 3.06ghz it will give for sure some speedup because it goes from 100k nps to 120k nps. Nearly 20% speedup it gets with it (18.6 or something) which gives a positive speedup also in depth. For deepjunior we know that it already works bad at 8 processor Xeon 1.6Ghz versus 4 processor Xeon 1.9Ghz, so i *assume* for now that SMT/HT will not give it much benefit for it at all, but perhaps Amir or Shay wants to give a statement regarding this themselves. We talk of course about the SMT/HT from Xeon processors up to 2.8Ghz now for those which have it enabled. For the P4 3.06Ghz and also Xeons of that and above things are a different matter. Best regards, Vincent
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