Re: kern/53016: Clock not stable

[Joerg Sonnenberger <joerg%bec.de@localhost>]

The following reply was made to PR kern/53016; it has been noted by GNATS.

From: Joerg Sonnenberger <joerg%bec.de@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
	netbsd-bugs%netbsd.org@localhost, kivinen%iki.fi@localhost
Subject: Re: kern/53016: Clock not stable
Date: Wed, 4 Apr 2018 10:10:22 +0200

 On Wed, Apr 04, 2018 at 05:50:01AM +0000, Michael van Elst wrote:
 >  He already mentioned the deviations for all clock sources. 'lapic' and
 >  also 'clockinterrupt' were bad. The rest looked like an average PC that
 >  is not kept in sync by ntpd.
 
 ...this makes me suspect that the system goes into deep sleep states
 occassionally, where the lapic is stopped. That would also explain time
 keeping problems of ntpd, since the ntp frequency adjustments are done
 in the time interrupt, not by fudging the time counter frequencies.
 
 Joerg