user:sys time ratio

Colin Percival colin.percival at wadham.ox.ac.uk
Sun Nov 30 06:34:45 PST 2003


At 15:30 30/11/2003 +0100, Poul-Henning Kamp wrote:
>In message <5.0.2.1.1.20031130140203.031e8d08 at popserver.sfu.ca>, Colin 
>Percival
>  writes:
> >   When running `make buildworld`, I see large amounts of sys time; eg, 27
> >minutes user & 14 minutes sys for building 5.2, or 14 minutes user & 10
> >minutes sys for building 4.9.  I expected the ratio of user:sys to be much
> >larger than this, and mailing list traffic indicates that a 4:1 ratio is
> >typical.
 >I've seen UNIX systems have "typical" system/user splits from 1/9 to 9/1
>it all depends on what you're doing.

   Sure, but buildworld is a fairly well-defined benchmark; I wouldn't 
expect to see such a large difference when running exactly the same code on 
different systems.

Colin Percival




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