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Subject: Re: Intel 8 vs MSVC 6 /w Crafty

Author: Bryan Hofmann

Date: 07:54:20 02/16/04

Go up one level in this thread


On February 16, 2004 at 10:34:54, Peter Skinner wrote:

>On February 16, 2004 at 10:27:24, Ingo Bauer wrote:
>
>>Hi
>>
>>>If you didn't change hashing sizes, something is broken in the compiler
>>>options...  apparently a bad optimization somewhere.
>>>
>>>node counts can not vary...
>>
>>Something is broken! I have post one below Bryan's and my nummbers differ in
>>node counts as well. It seems the MSVC6_non-SMP is broken.
>>
>>Ingo
>
>MSVC 6.0 /w sp5 /wo /dfast
>
>EPD Kit revision date: 1996.04.21
>unable to open book file [./book.bin].
>book is disabled
>unable to open book file [./books.bin].
>
>Crafty v19.10
>
>White(1): bench
>Running benchmark. . .
>......
>Total nodes: 89942714
>Raw nodes per second: 708210
>Total elapsed time: 127
>SMP time-to-ply measurement: 5.039370
>White(1):
>
>MSVC 6.0 /w sp5 /w /dfast
>
>EPD Kit revision date: 1996.04.21
>unable to open book file [./book.bin].
>book is disabled
>unable to open book file [./books.bin].
>
>Crafty v19.10
>
>White(1): bench
>Running benchmark. . .
>......
>Total nodes: 89942714
>Raw nodes per second: 686585
>Total elapsed time: 131
>SMP time-to-ply measurement: 4.885496
>White(1):
>
>I get exactly the same node code on two different "versions" of the non-smp
>build of the MSVC compile.
>
>In fact I get the exact same node count on all of the versions.
>
>What I do notice is if the /DFUTILITY option is not set the nodes are different.
>I compile all of mine with it _enabled_.
>
>Peter.

It would appear then that something is optimized/changed that does not jive with
AMD processors as mine and Ingo's have the same node count both on AMDs.

Mine
*wcrafty-MSVC6-nonsmp.exe
Total nodes: 90002615
Raw nodes per second: 1071459
Total elapsed time: 84
SMP time-to-ply measurement: 7.619048

Ingo's
wcrafty-MSVC6-nonsmp
EPD Kit revision date: 1996.04.21
unable to open book file [./book.bin].
book is disabled
unable to open book file [./books.bin].
Crafty v19.10
White(1): bench
Running benchmark. . .
......
Total nodes: 90002615
Raw nodes per second: 900026
Total elapsed time: 100
SMP time-to-ply measurement: 6.400000



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