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Date:      Mon, 20 Feb 2006 18:33:08 -0500
From:      Kris Kennaway <kris@obsecurity.org>
To:        Giorgos Keramidas <keramida@ceid.upatras.gr>
Cc:        current@freebsd.org
Subject:   Re: Lots of calcru: runtime went backwards, never saw it before
Message-ID:  <20060220233307.GA25429@xor.obsecurity.org>
In-Reply-To: <20060220232435.GA38768@flame.pc>
References:  <20060220231530.GA38930@nagual.pp.ru> <20060220232435.GA38768@flame.pc>

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On Tue, Feb 21, 2006 at 01:24:35AM +0200, Giorgos Keramidas wrote:
> On 2006-02-21 02:15, Andrey Chernov <ache@freebsd.org> wrote:
> > What I got with recent -current (below). What does it mean, what I
> > supposed to do and why I never saw it before?
> >
> > Feb 21 01:14:19 pobrecita kernel: calcru: runtime went backwards from
> > 42153 usec to 42152 usec for pid 613 (sshd)
> > Feb 21 01:14:19 pobrecita kernel: u 2:28102/28101 s 1:14051/14050 i 0:0=
/1
> > Feb 21 01:14:19 pobrecita kernel: calcru: runtime went backwards from 2=
979
> > usec to 2978 usec for pid 606 (getty)
> > Feb 21 01:14:19 pobrecita kernel: u 0:0/0 s 1:2979/2978 i 0:0/0
> > Feb 21 01:14:19 pobrecita kernel: calcru: runtime went backwards from 3=
148
> > usec to 3147 usec for pid 605 (getty)
> > Feb 21 01:14:19 pobrecita kernel: u 0:0/0 s 1:3148/3147 i 0:0/0
> > Feb 21 01:14:19 pobrecita kernel: calcru: runtime went backwards from 5=
011
> > usec to 5010 usec for pid 585 (inetd)
> > Feb 21 01:14:19 pobrecita kernel: u 1:5011/5010 s 0:0/0 i 0:0/0
> > Feb 21 01:14:19 pobrecita kernel: calcru: runtime went backwards from
> > 292891 usec to 292883 usec for pid 29 (pagezero)
> > Feb 21 01:14:19 pobrecita kernel: u 0:0/0 s 37:292891/292883 i 0:0/0
>=20
> Hi Andrey,
>=20
> Can you test with the following /etc/defaults/rc.conf vars set to "HIGH"?
>=20
> keramida@flame:/home/keramida$ grep _cx /etc/defaults/rc.conf /etc/rc.conf
> /etc/defaults/rc.conf:performance_cx_lowest=3D"LOW"      # Online CPU idl=
e state
> /etc/defaults/rc.conf:economy_cx_lowest=3D"LOW"          # Offline CPU id=
le state
> keramida@flame:/home/keramida$
>=20
> Without these set to "HIGH" in rc.conf, my laptop crawls to a halt very
> fast after it enters multiuser mode.

It's not related to this, but to phk's recent timekeeping commits.
Others have already reported it.

Kris

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