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Subject: Re: Using a dual processor system

Author: Robert Hyatt

Date: 12:33:12 09/20/00

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On September 20, 2000 at 14:20:09, Gordon Rattray wrote:

>I'm considering buying a dual processor system (dual PIIIs).  What sort of
>things should I be aware of?  Here's my thoughts...
>
>- I presume that at the moment I can only run Deep Junior in order to use both
>CPUs for the one engine simultaneously.  Does DJ achieve 1.8 efficiency while
>using a dual system?  Are there other distributed engines available?

There are several, including Crafty.  Diep.  Etc.



>
>- within the Fritz interface, I expect to be able to use multiple kibitzers and
>benefit from the dual CPUs.  Assuming there is enough memory, is this equivalent
>to having two separate machines each with one of the CPUs?
>
>- for the "compare analysis" functionality, and selecting Fritz, Junior, Nimzo,
>etc., will I benefit?  Or do I need to run two instances of the interface?

I doubt the interface knows beans about threads.  This means you will have to
run two instances to get two programs running at the same time.




>
>- I should be able to support engine matches/tournaments with pondering on.
>

yes.

>
>These are some of the things I've been thinking about while considering a dual
>processor system.  Although I have other motives, e.g. running a multi-threaded
>compiler, I'd like to know more about using it for chess programs.  I'd
>appreciate any comments/advice on this.
>
>Gordon


I know of no multi-threaded compilers (ie a compiler that will use two cpus
to compile a single source module).  The usual "make" under linux will use
multiple cpus to compile different source modules at the same time.



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