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Subject: Re: Multiple processors on one chip...

Author: Robert Hyatt

Date: 06:34:13 03/04/00

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On March 04, 2000 at 00:01:35, Tom Kerrigan wrote:

>On March 03, 2000 at 22:28:55, Robert Hyatt wrote:
>
>>I wasn't thinking carefully earlier, but should have suggested that maybe
>>TSCP is much smaller and more 'cache-friendly' than a larger program like
>>crafty.  The AMD processors had historically had a good cache/cpu interface,
>
>Yes, I know that TSCP runs entirely out of the original Pentium's 16k (?) L1
>cache.
>
>A much larger program like Crafty uses the L2 cache. The PII's L2 cache has
>always been _much_ better than the Pentium's.
>
>So it makes me wonder... if you made the Pentium's L2 cache as fast as the
>PII's, would it achieve parity again? Seems likely to me.
>
>-Tom


It would help...  but without register renaming, it becomes difficult to feed
two pipes for long sequences of instructions.  I think the p6 would still keep
a significant edge, but better cache would narrow the gap...



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