Date: Thu, 21 Jul 2011 12:07:38 -0400 From: Jung-uk Kim <jkim@FreeBSD.org> To: freebsd-stable@FreeBSD.org Cc: Callum Gibson <callumgibson@optusnet.com.au>, freebsd-amd64@freebsd.org Subject: Re: powernow regression in 8-STABLE Message-ID: <201107211207.41663.jkim@FreeBSD.org> In-Reply-To: <20110721022818.GA17771@omma.gibson.athome> References: <20110719112033.GA51765@omma.gibson.athome> <201107201928.54079.jkim@FreeBSD.org> <20110721022818.GA17771@omma.gibson.athome>
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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
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