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Date: Tue, 10 Apr 2001 00:31:08 +0200 (CEST)
From: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
cc: Mark Salisbury <mbs@mc.com>, Jeff Dike <jdike@karaya.com>,
        schwidefsky@de.ibm.com, linux-kernel@vger.kernel.org
Subject: Re: No 100 HZ timer !
In-Reply-To: <E14mi1M-0002pU-00@the-village.bc.nu>
Message-ID: <Pine.LNX.3.96.1010410002852.4212A-100000@artax.karlin.mff.cuni.cz>
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> > this is one of linux biggest weaknesses.  the fixed interval timer is a
> > throwback.  it should be replaced with a variable interval timer with interrupts
> > on demand for any system with a cpu sane/modern enough to have an on-chip
> > interrupting decrementer.  (i.e just about any modern chip)
> 
> Its worth doing even on the ancient x86 boards with the PIT.

Note that programming the PIT is sloooooooow and doing it on every timer
add_timer/del_timer would be a pain.

Mikulas

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