Re: PIT, TSC and power management [was: Re: 2.6.0-test3 "loosing ticks"]

From: Jamie Lokier
Date: Fri Aug 15 2003 - 18:13:49 EST


john stultz wrote:
> Well, depending on how ntp is compiled, it could use stime, rather then
> settimeofday. This causes ntp to set the time on average .5 seconds off
> the desired time. Since .5 is outside the .128 sec slew boundary, ntp
> will do another step adjustment which has the same poor accuracy. This
> results in ntp just hopping back and forth around the desired time.

On my more-or-less Red Hat 9 system, it would be quite surprising if
the ntpd which works with 2.4 suddenly stopped working...

Though it would be less of a surprise if ntpd had always had this
problem in this box, and I just didn't notice with 2.4.

-- Jamie
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