[Computer-go] intel i5 760 vs amd Phenom II X6 1055T

Fuming Wang fumingw85 at gmail.com
Mon Nov 29 18:30:49 PST 2010

I am not doing any tree updates, just pure MC simulation. 1090T has 6 core
and i5 has 4 core, however i5 is better at level 3 caching (I've been told),
so don't know which factor dominates. i7 920 with 6 core should definitely
better than 1090T.


On Mon, Nov 29, 2010 at 8:45 PM, Petr Baudis <pasky at ucw.cz> wrote:

> On Sun, Nov 28, 2010 at 09:37:55PM +0800, Fuming Wang wrote:
> > These two has simular prices. Any one know which cpu is better for Go MC
> > simulation?
> FYI, at our department we will be shortly purchasing some Phenom 1090T
> and Opteron 6134 machines, and I will be comparing the MCTS performance
> between these and i7 920 (unfortunately, I don't have any newer i7 CPUs
> available). I hope to be able to post about it in four to six weeks when
> everything arrives and is put together.
> Not sure if you intended it while phrasing your question, but the
> classic MCTS is actually very diverse task - the MC simulation part you
> mentioned is heavy on integer arithmetic, branching and possibly bit
> operations.
> OTOH the tree search part is entirely different, very heavy on floating
> point arithmetics (IIRC, most of the time in this part is spent taking
> the square roots; overally, tree search is taking 1/4 to 1/3 of the
> runtime, a significant amount; of course the balances may be different
> in other programs with heavier/lighter playouts).
>                                Petr "Pasky" Baudis
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