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Date: Tue, 10 Apr 2001 14:45:54 +0200
From: Andi Kleen <ak@suse.de>
To: Mark Salisbury <mbs@mc.com>
Cc: Andi Kleen <ak@suse.de>, linux-kernel@vger.kernel.org
Subject: Re: No 100 HZ timer !
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On Tue, Apr 10, 2001 at 08:07:04AM -0400, Mark Salisbury wrote:
> which kind of U/K accaounting are you referring to?
> 
> are you referring to global changes in world time? are you referring to time
> used by a process? 

The later.

> 
> I think the reduction of clock interrupts by a factor of 10 would buy us some
> performance margin that could be traded for a slightly more complex handler.

It depends on your workload if you can trade that in. e.g. when a few hundred TCP
sockets are active a lot of timer ticks will run some timer handler. Also generally
the kernel has quite a lot of timers. There is some reduction on a idle system. That
is no doubt useful for VM/UML/VMware where you can have idle sessions hanging around, 
but otherwise it's not very interesting to optimize idle systems (except maybe for 
power saving purposes)


-Andi
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