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Date: Wed, 17 Apr 2002 01:18:42 -0400
From: Mark Mielke <mark@mark.mielke.cc>
To: Robert Love <rml@tech9.net>
Cc: davidm@hpl.hp.com, Davide Libenzi <davidel@xmailserver.org>,
        Linus Torvalds <torvalds@transmeta.com>, linux-kernel@vger.kernel.org
Subject: Re: Why HZ on i386 is 100 ?
Message-ID: <20020417011842.A12455@mark.mielke.cc>
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On Tue, Apr 16, 2002 at 08:57:09PM -0400, Robert Love wrote:
> On Tue, 2002-04-16 at 20:49, David Mosberger wrote:
> > But since it's popular, I did measure it quickly on a relatively
> > slow (old) Itanium box: with 100Hz, the kernel compile was about
> > 0.6% faster than with 1024Hz (2.4.18 UP kernel).
> One question I have always had is why 1024 and not 1000 ?
> 
> Because that is what Alpha does?  It seems to me there is no reason for
> a power-of-two timer value, and using 1024 vs 1000 just makes the math
> and rounding more difficult.

Only from the perspective of time displayed to a user... :-)

Of course, that may be one of the only factors...

mark

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