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Subject: Re: 64 bits

Author: Eugene Nalimov

Date: 09:46:02 06/21/02

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On June 21, 2002 at 02:02:58, Dann Corbit wrote:

>On June 21, 2002 at 01:39:11, Eugene Nalimov wrote:
>[snip]
>>And each hash table probe (main memory access) costs several hundred CPU cycles
>>on both 32-bit and 64-bit system.
>
>This is an interesting statement.  What if the CPU has 4 megs of on-die cache
>and the hash table is 2 megs?
>Will it make a difference if the ram is 500 MHz DDR?  Rambus?
>Does the CPU always wait that long period?
>
>Been a long time since I delved into timings, though I do know a memory fetch
>and a missed branch prediction are heavy blows.



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