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Subject: Re: what's this "SMP time-to-ply measurement" ? (NT)

Author: Roy Eassa

Date: 11:35:53 09/04/02

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On September 03, 2002 at 11:13:02, Robert Hyatt wrote:

>On September 02, 2002 at 02:11:54, Jouni Uski wrote:
>
>>.
>
>
>It is something written by Jason Deines a few years ago.  It is basically
>an estimate of SMP efficiency, although I am not sure it is really very
>meaningful.
>
>It is computed as follows:
>
>(640.0 / (total_time_used / 100))
>
>which means bigger numbers are better.  640 probably comes from some
>machine Jason used while modifying bench.c, and I would suspect it
>represents some "factor" of overall speedup compared to that machine,
>whatever it was...
>
>But as total-time-used shrinks, the above computation will produce larger
>and larger values...  I will probably change the computation to produce
>something more meaningful, such as "average speedup" or something similar...


Pardon my math, but isn't that just 64000/total_time_used?



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