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Subject: Re: Perft benchmark

Author: Anthony Cozzie

Date: 16:03:27 12/12/03

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On December 12, 2003 at 11:23:06, Slater Wold wrote:

>On December 12, 2003 at 06:52:15, Albert Bertilsson wrote:
>
>>I've collected some info posted in the distributed perft thread.
>>
>>Using Sharper 0.17p to do perft calculations with hash table has given the
>>following results:
>>
>><PRE>
>>Hardware					Hash	CS	Nodes		MNPS
>>Athlon XP (Barton) at real 2400MHz		256	51254	84998978956	165
>>P4 3.06Ghz					256	49801	84998978956	170
>>Athlon XP (Barton) at real 2400MHz		512	45422	84998978956	187
>>Athlon XP 2.5GHz, 200fsb(400DDR) with 3-4-4-10	512	43848	84998978956	193
>>Athlon XP (Barton) at real 2400MHz		1024	42027	84998978956	202
>></pre>
>>
>>Single cpu machines counting 202 million nodes per second is really impressive.
>>
>>If you have a machine that you'd like to bench, download the distributed perft
>>client (Sharper 0.17p is included with it). Set the hash size with "hashsize
>>XXX" (XXX = number of megabytes of ram) and run "perfthash 8" and report the
>>time it took to finnish the calculation.
>>
>>I'm going to add some lower spec. machines later.
>>
>>/Regards Albert
>
>Albert...you made a program that is faster on a P4 3.06Ghz than on the fastest
>(XP) AMDs.
>
>People aren't going to like you.  :D
>
>P4 3.06Ghz - 512MB HT:
>
>perfthash 8 = 43134cs

not too surprising - the P4 has a lot fewer branches to mispredict than with a
real chess program . . .

anthony



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