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Date: Tue, 16 Apr 2002 13:12:09 -0400
From: Mark Mielke <mark@mark.mielke.cc>
To: Rik van Riel <riel@conectiva.com.br>
Cc: Terje Eggestad <terje.eggestad@scali.com>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        Liam Girdwood <l_girdwood@bitwise.co.uk>,
        BALBIR SINGH <balbir.singh@wipro.com>,
        William Olaf Fraczyk <olaf@navi.pl>,
        Lee Irwin III <wli@holomorphy.com>
Subject: Re: Why HZ on i386 is 100 ?
Message-ID: <20020416131209.A5531@mark.mielke.cc>
In-Reply-To: <20020416093824.A4025@mark.mielke.cc> <Pine.LNX.4.44L.0204161231440.16531-100000@duckman.distro.conectiva>
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On Tue, Apr 16, 2002 at 12:32:25PM -0300, Rik van Riel wrote:
> On Tue, 16 Apr 2002, Mark Mielke wrote:
> > Increasing the HZ can only improve responsiveness, however, there is a
> > cost (mentioned by others). The cost is that the scheduler is executed
> > more often per second. If the scheduler does the same amount of work
> > per tick, but there are more ticks per second, the scheduler does more
> > work overall, and the CPU is free for use by the processes less.
> Why are you discussing Linux 1.2 ?
> Linux is not running the scheduler each cpu tick and hasn't
> done this for years.

Hmm... sorry... :-) Too early in the morning...

mark

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