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

Author: Robert Hyatt

Date: 08:13:02 09/03/02

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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...



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