Messages in this thread | | | Date | Fri, 18 Sep 1998 11:08:29 -0700 (PDT) | From | Linus Torvalds <> | Subject | Re: Interesting scheduling times |
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On Fri, 18 Sep 1998, Richard Gooch wrote: > > Actually, after some further testing, I get the same result! The first > time it's faster, then subsequent runs are slower (when using RT > processes). For non-RT processes, the times are stable. Strange.
I haven't even looked at the benchmark you seem to be talking about - I use "lmbench" myself which I trust to be reasonably realistic. It certainly showed an effect of my FPU screwup, although it's not all that large on any reasonable system (it's probably horrible on a i386/i387 combination where FP operations are slower).
lmbench uses a set of pipes and passes a token around to force scheduling, and that should work fine. I'd be nervous about any other kind of scheduling benchmark.
Linus
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