kern/140361: [cpufreq] speed-stepping broken on PhenomII (acpi?)

[Hannes]

The following reply was made to PR kern/140361; it has been noted by GNATS.

From: Hannes <freebsd at soulrebel.in-berlin.de>
To: bug-followup at freebsd.org
Cc: Alexander Best <alexbestms at wwu.de>, brucec at freebsd.org
Subject: Re: kern/140361: [cpufreq] speed-stepping broken on PhenomII (acpi?)
Date: Thu, 25 Mar 2010 13:12:59 +0000

 Thanks for your replies!
 
 > i don't think you're looking at the right sysctl values. you should
 > be checking `sysctl dev.cpu.0.freq dev.cpu.0.freq_levels`.
 >
 
 I checked those, they looked fine, so i didnt mention it:
 
 dev.cpu.0.freq: 3000
 dev.cpu.0.freq_levels: 3000/23530 2300/17400 1800/14520 800/7315
 
 (freq just never goes down [unlike my intel laptop])
 
 > 'dev.cpu.0.freq_levels' tells you what steppings are available and
 > 'dev.cpu.0.freq' which current stepping your cpu is using.
 
 They look right, or not?
 
 > also be
 > sure you're running powerd (`/etc/rc.d/powerd onestart`).
 
 hannes at fbsdmain /c/h/hannes> ps ax | grep powerd
   925  ??  Ss     0:05,09 /usr/sbin/powerd -a adaptive -i adaptive
 
 
 > i'm not an expert on est though. `dmesg -a|egrep '^est[0-9]*'`
 > reports:
 > 
 > est0: <Enhanced SpeedStep Frequency Control> on cpu0
 > est: CPU supports Enhanced Speedstep, but is not recognized.
 > est: cpu_vendor GenuineIntel, msr 925092506000925
 > est1: <Enhanced SpeedStep Frequency Control> on cpu1
 > est: CPU supports Enhanced Speedstep, but is not recognized.
 > est: cpu_vendor GenuineIntel, msr 925092506000925
 > 
 > on my machine so i'm not sure how much powersaving is really being
 > performed. your cpu might report the same.
 
 fbsdmain# dmesg -a | egrep '^est[0-9]*'
 fbsdmain#
 
 Hm, whats this? Never saw it before, and it isnt mentioned in the 
 freebsd-wiki and has no man-page, also i can't load it as module and 
 dont have it built-in. Are you on current maybe?
 
 
 Concerning  bruce's input:
 hannes at fbsdmain /c/h/hannes> sysctl dev.cpu | grep cx
 dev.cpu.0.cx_supported: C1/0
 dev.cpu.0.cx_lowest: C1
 dev.cpu.0.cx_usage: 100.00% last 500us
 dev.cpu.1.cx_supported: C1/0
 dev.cpu.1.cx_lowest: C1
 dev.cpu.1.cx_usage: 100.00% last 500us
 dev.cpu.2.cx_supported: C1/0
 dev.cpu.2.cx_lowest: C1
 dev.cpu.2.cx_usage: 100.00% last 500us
 dev.cpu.3.cx_supported: C1/0
 dev.cpu.3.cx_lowest: C1
 dev.cpu.3.cx_usage: 100.00% last 500us
 
 -> FreeBSD doesnt recognize any other states. Thats probably the issue, 
 or not?
 
 > anyway it's probably better to send a message to stable at .
 
 So this is not a Bug?
 
 Thanks for your help!