[Computer-go] Big Iron for Orego
drake at lclark.edu
Mon Mar 1 09:10:23 PST 2010
FWIW, the proposed single machine has four 6-core AMD chips.
On Mar 1, 2010, at 9:07 AM, Petr Baudis wrote:
> I don't know if Java can adapt to i7 well, but here are few random
> observations of mine based on Pachi:
> Intel(R) Core(TM)2 Quad CPU Q9300 @ 2.50GHz
> Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz
> i7 can play 30% more games per second with 4 threads. With
> hyperthreading, games/thread goes down but when using all 8 threads,
> total games per second increase vs total 4-thread Core2 is 50% - so
> per-thread performance goes down with hyperthreading (unsurprising)
> per-core performance goes somewhat up (at least for our MCTS
> implementation; good, often not the case with past Intel processors
> supporting HT).
> Thus, I'd recommend really going for i7/Nehalem if possible - it's
> ;-) It's probably worth buing more of 920 rather than fewer of the
> ones, but I don't have experience there.
> The Mac Mini cluser has 48 cores, but 5x4-core i7 with HT is 40 and
> will be *probably* more energy-efficient. If the 24-core machine is
> that means 48 threads, I'd go for that. If you were willing to buy
> separate machines, you could probably afford more cores for the
> buck; but
> that way also has plenty disadvantages, obviously.
> Petr "Pasky" Baudis
> http://pasky.or.cz/ | "Ars longa, vita brevis." -- Hippocrates
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