Author: Robert Hyatt
Date: 19:47:04 03/04/03
Go up one level in this thread
On March 04, 2003 at 17:39:42, Vincent Diepeveen wrote: >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. You keep saying that. It continues to be _wrong_. The 2.8 xeon has the _exact_ same cpu core (and SMT) that the 3.06 xeon and PIV has. And when I say _exactly_ I mean _exactly_. This is _directly_ from Intel... for the record. > >Best regards, >Vincent
This page took 0.01 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.