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From: beyer@cbnewsh.ATT.COM (jean-david.beyer)
Newsgroups: comp.arch
Subject: Re: fad computing
Summary: I am not a UNIX Kernel Guru...
Message-ID: <6884@cbnewsh.ATT.COM>
Date: 26 Dec 89 13:46:16 GMT
References: <8840002@hpfcso.HP.COM> <76700096@p.cs.uiuc.edu>
Organization: AT&T Bell Laboratories
Lines: 16

In article <76700096@p.cs.uiuc.edu>, gillies@p.cs.uiuc.edu writes:
> reproduceable.  I don't believe this is possible under preemptive
> UNIX.  You must run a much longer benchmark on UNIX to wipe out the
> timing noise due to context switches.

... but I would imagine if you had enough IO buffer space, that you
could do all that without having the IO cost you anything in your timing.
The IO would happen eventually (say, by the next internal sync point),
but that could be after your work was done.


-- 
Jean-David Beyer
AT&T Bell Laboratories
Holmdel, New Jersey, 07733
attunix!beyer