Subject: Re: lazy mlock?
To: None <email@example.com>
From: M. Warner Losh <firstname.lastname@example.org>
Date: 04/17/2002 22:58:45
In message: <20020416161327.S9863@dr-evil.shagadelic.org>
Jason R Thorpe <email@example.com> writes:
: On Tue, Apr 16, 2002 at 11:48:32PM +0100, David Laight wrote:
: > If it isn't a silly question, why should ntpd 'lock down' any code at all?
: Because it is very sensitve to being able to react to a message. Making
: it wait to page in something will skew its results.
It isn't so much that it needs to react quickly to a message, but it
needs to react in a time period that has a low standard deviation from
packet to packet. Having to swap in first increases the standard
deviation of response time quite a bit, which lowers the performance