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	Wed, 10 Apr 2002 01:57:16 -0400
Subject: Re: nanosleep
From: Robert Love <rml@tech9.net>
To: mark manning <mark.manning@fastermail.com>
Cc: linux-kernel@vger.kernel.org
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Date: 10 Apr 2002 01:57:16 -0400
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On Wed, 2002-04-10 at 00:41, mark manning wrote:

> thanx - how much of a difference should i expect - i know the syscall is
> asking for at least the required ammount but that the task switcher might
> not give me control back for a while after the requested delay but i was
> expecting to be a little closer to what i had asked for - this isnt critical
> of corse but i would like to know what to expect.

The minimum granularity of the timer is 1/HZ, which on a i386 is only
10ms.

If you want high-resolution timers, check out the high-res-timers
project at http://high-res-timers.sf.net/ - they implement POSIX timers
(which include a nanosleep call) with very high resolution (1/cpu
clock).

	Robert Love

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