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Subject: Re: Engine testing: Memory Speed vs NPS at 400 & 32mb hash settings

Author: Aaron Gordon

Date: 15:26:18 08/08/02

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On August 08, 2002 at 16:40:14, Gian-Carlo Pascutto wrote:
>
>The latency will be important, yes, because you will spend the time waiting for
>the data to come from the main memory. But bandwidth? Each probe will be exactly
> the size of one cacheline or a small multiple thereof.
>
>You're not moving huge continous chunks of RAM back and forth in hashing, but
>randomly distributed tiny amounts of data. What will determine your speed is not
>the bandwith but the latency.
>
>--
>GCP

Thats odd.. because when I tested with Cachemem the latencies between the two
settings were basically identical.. yet I get this boost from a 57% memory
increase. If you'd like you can do similar tests yourself and I can provide you
with cachemem to test your latencies (and it does a mem bandwidth test).



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