Re: Interesting scheduling times - NOT

Oliver Xymoron (oxymoron@waste.org)
Thu, 24 Sep 1998 10:53:10 -0500 (CDT)


On Thu, 24 Sep 1998, Peter T. Breuer wrote:

> > Not that you would really expect most of events you'd benchmark on a
> > computer to have a very bell-shaped distribution.
>
> It doesn't matter. The result you quote is true for any distribution
> with bounded mean and variance. It's one of the basic theorems in
> probability. I.e. Larry's argument is wrong here. Well spotted.

I only mentioned that because Larry mentioned normal distributions of
results in a previous message and it struck me as strange to expect a
normal distribution of scheduler latencies. He was arguing against using
the minimum time from a benchmark, as I recall. There are a number of
places this is useful number, for instance, the round trip times from
ping. The minimum rtt is a rather hard limit and tells you what the best
latency you can expect is.

--
 "Love the dolphins," she advised him. "Write by W.A.S.T.E.." 

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