Date: Sun, 30 Nov 2003 14:34:37 +0000 From: Colin Percival <colin.percival@wadham.ox.ac.uk> To: "Poul-Henning Kamp" <phk@phk.freebsd.dk> Cc: freebsd-current@freebsd.org Subject: Re: user:sys time ratio Message-ID: <5.0.2.1.1.20031130143248.020dc740@popserver.sfu.ca> In-Reply-To: <26251.1070202656@critter.freebsd.dk> References: <Your message of "Sun, 30 Nov 2003 14:20:52 GMT." <5.0.2.1.1.20031130140203.031e8d08@popserver.sfu.ca>
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At 15:30 30/11/2003 +0100, Poul-Henning Kamp wrote: >In message <5.0.2.1.1.20031130140203.031e8d08@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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