From owner-freebsd-stable@FreeBSD.ORG  Thu Jul 21 16:07:50 2011
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: freebsd-stable@FreeBSD.org
Received: from [127.0.0.1] (freefall.freebsd.org [IPv6:2001:4f8:fff6::28])
	by hub.freebsd.org (Postfix) with ESMTP id E4594106564A;
	Thu, 21 Jul 2011 16:07:49 +0000 (UTC)
	(envelope-from jkim@FreeBSD.org)
From: Jung-uk Kim <jkim@FreeBSD.org>
To: freebsd-stable@FreeBSD.org
Date: Thu, 21 Jul 2011 12:07:38 -0400
User-Agent: KMail/1.6.2
References: <20110719112033.GA51765@omma.gibson.athome>
	<201107201928.54079.jkim@FreeBSD.org>
	<20110721022818.GA17771@omma.gibson.athome>
In-Reply-To: <20110721022818.GA17771@omma.gibson.athome>
MIME-Version: 1.0
Content-Disposition: inline
Content-Type: text/plain;
  charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Message-Id: <201107211207.41663.jkim@FreeBSD.org>
Cc: Callum Gibson <callumgibson@optusnet.com.au>, freebsd-amd64@freebsd.org
Subject: Re: powernow regression in 8-STABLE
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, 
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 21 Jul 2011 16:07:50 -0000

On Wednesday 20 July 2011 10:28 pm, Callum Gibson wrote:
> On 20Jul11 19:28, Jung-uk Kim wrote:
> }From your dmesg output, I see that the processor speed was not
> }calibrated properly.  ML-40's max. core freq. is 2,200 MHz
> according }to its specification but it was probed at 2,282 MHz,
> which is too }high.  I think that's the problem.  Can you please
> try the attached }patch?
>
> Yes, I have seen core freq wobble around for most of the time I've
> owned it, but usually close to 2200. This morning (with my reverted
> powernow.c) I had: dev.cpu.0.freq_levels: 3080/35000 2800/29000
> 2520/24000 2240/20000 1120/9000 which I don't believe I've seen
> before. Anyway...
>
> With your new patch applied (and powernow.c changed back to
> r222148) I get exact freq levels:
>
> dev.cpu.0.freq_levels: 2200/35000 2000/29000 1800/24000 1600/20000
> 800/9000

That's better. :-)

> However, dev.cpu.0.freq OID is still missing from sysctl output.
>
> As another data point, with your new patch applied, but the old
> powernow.c, (which I booted into mistakenly first time), I did have
> dev.cpu.0.freq, but the freq levels weren't exact.
>
> Here is a new verbose boot output with a cleaned and built kernel,
> 8-STABLE as at time=1311028656 and your patch applied:
>
> http://members.optusnet.com.au/callumgibson/verboseboot2.out

Can you please do "set debug.cpufreq.verbose=1" from loader prompt and 
show me the dmesg output?  I want to see intial settings.  You can 
reset it from command line with "sysctl debug.cpufreq.verbose=0" 
later.

Thanks,

Jung-uk Kim