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Subject: Re: Processor's circles - How to measure?

Author: Tom Kerrigan

Date: 12:48:23 12/06/01

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On December 05, 2001 at 19:19:35, Dann Corbit wrote:

>On December 05, 2001 at 18:54:35, Pham Minh Tri wrote:
>
>>Hi all,
>>Someone could know exactly how many processor's cirlces for some functions (e.g,
>>eval). I am curious how to measure?
>
>By circles, I assume you mean cycles.
>
>You can get an approximation by having your compiler emit assembly for the
>function you are interested in.  Then count the cycles for each operation.

Man, if you thought counting cycles on a 486 was hard, I can't wait to see
somebody try for a chip that has 20 pipeline stages, a trace cache, n-many
variables determining memory latency, etc. ;)

-Tom



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