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Date:      Mon, 20 Feb 2006 15:16:56 -0500
From:      Kris Kennaway <kris@obsecurity.org>
To:        Yar Tikhiy <yar@comp.chem.msu.su>
Cc:        freebsd-current@freebsd.org
Subject:   Re: -current is sluggish
Message-ID:  <20060220201656.GA20356@xor.obsecurity.org>
In-Reply-To: <20060220165019.GF55136@comp.chem.msu.su>
References:  <43ED294A.2050505@savvis.net> <43F6C577.5020901@savvis.net> <20060220165019.GF55136@comp.chem.msu.su>

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[-- Attachment #1 --]
On Mon, Feb 20, 2006 at 07:50:19PM +0300, Yar Tikhiy wrote:
> On Fri, Feb 17, 2006 at 10:57:59PM -0800, Maksim Yevmenkin wrote:
> > Maksim Yevmenkin wrote:
> > >Dear Hackers,
> > >
> > >after upgrading to today's current my laptop is very sluggish
> [snip]
> > and just to close this thread, all i had to do is put
> > 
> > performance_cx_lowest="HIGH"
> > 
> > into my /etc/rc.conf and then
> > 
> > # /etc/rc.d/power_profile 0x01
> > 
> > this fixes things for me.
> > 
> > i find it strange that /etc/defaults/rc.cond has 
> > performance_cx_lowest="LOW", but someone must have had a good reason for 
> > this.
> 
> I'm about to run CURRENT on a rather modern laptop with all the
> fancy power-control stuff, which I've never done before, so this
> thread is rather interesting to me.  According to rc.conf(5),
> performance_cx_lowest specifies a CPU power state when idle.
> Shouldn't it have no effect on the CPU speed when it has some real
> work to do?  Looks like there is significant latency in the CPU's
> transition from idle state to active state -- at least in your case.

Talk to njl@, who recently made this change.

Kris

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