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To: linux-kernel@vger.kernel.org
From: "H. Peter Anvin" <hpa@zytor.com>
Subject: Re: Why HZ on i386 is 100 ?
Date: 16 Apr 2002 17:22:28 -0700
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Copyright: Copyright 2002 H. Peter Anvin - All Rights Reserved
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Followup to:  <E16xTTd-0008Va-00@the-village.bc.nu>
By author:    Alan Cox <alan@lxorguk.ukuu.org.uk>
In newsgroup: linux.dev.kernel
>
> > I seem to recall from theory that the 100HZ is human dependent. Any
> > higher and you would begin to notice delays from you input until
> > whatever program you're talking to responds. 
> 
> Ultimately its because Linus pulled that number out of a hat about ten years
> ago. For some workloads 1KHz is much better, for others like giant number
> crunching people actually drop it down to about 5..
> 

Hardly so.  100 Hz was standard on most commercial Unices around the
time the first Linux was done...

	-hpa
-- 
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt	<amsp@zytor.com>
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