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Subject: Re: How are dual cores going to affect chess?

Author: Matthew Hull

Date: 21:28:47 01/29/05

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On January 30, 2005 at 00:02:42, Robert Hyatt wrote:

>On January 29, 2005 at 14:03:00, Vincent Diepeveen wrote:
>
>>On January 29, 2005 at 11:35:54, Robert Hyatt wrote:
>>
>>>On January 29, 2005 at 08:20:07, Jason Kent wrote:
>>>
>>>>It looks like by the third quarter of this year, both intel and amd will be
>>>>selling dual cores.  Are they basically handled as two processors under task
>>>>manager, and software?  I'm guessing this is going mean that to get the most out
>>>>of your cpu, you will have to buy all the Deep versions.  Maybe that is why SMK
>>>>decided to seperate the programs?
>>>>
>>>>Jason
>>>
>>>Dual cores will be two cpus with shared cache.  This means your old dual-cpu MB
>>>will have four real processors, or your old quad-cpu MB will now have 8 cpus.
>>
>>Actually each cpu will have for each core its own L2 cache. So at a single dual
>>core cpu you will have 2 L2 caches. One for each core.
>>
>>That's both the case for intel and for AMD.
>>
>>Vincent
>
>
>Yep.  Each pair of cores will have a shared local memory.  Was thinking of this
>new NUMA issue when I wrote that.  I'll be able to post some performance numbers
>before too long, but I can't at present...


I was curious if you would treat a group of MCMs (multi-chip modules - IBM
terminology) as all NUMA or if it would be more efficient to design it as some
kind of mix of NUMA and SMP.




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