Date: Mon, 05 Nov 2007 11:10:51 -0800 From: Russell Jackson <raj@csub.edu> To: freebsd-current@freebsd.org Subject: Re: powerd adaptive mode latching Message-ID: <472F6ABB.3040807@csub.edu> In-Reply-To: <472E9D0B.5080409@csub.edu> References: <472E9D0B.5080409@csub.edu>
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[-- Attachment #1 --] Russell Jackson wrote: > Powerd seems to latch at the maximum - 1 cpufreq setting while in > adaptive mode. This is 100% reproducible for me. It never un-wedges from > this state no matter how long I wait. > > $ powerd -a adaptive -b adaptive -v > powerd: using sysctl for AC line status > powerd: using devd for AC line status > idle time > 90%, decreasing clock speed from 1289 MHz to 966 MHz > idle time > 90%, decreasing clock speed from 966 MHz to 644 MHz > idle time > 90%, decreasing clock speed from 644 MHz to 322 MHz > idle time < 65%, increasing clock speed from 322 MHz to 966 MHz > idle time > 90%, decreasing clock speed from 966 MHz to 644 MHz > idle time > 90%, decreasing clock speed from 644 MHz to 322 MHz > idle time < 65%, increasing clock speed from 322 MHz to 966 MHz > idle time < 65%, increasing clock speed from 966 MHz to 1611 MHz > idle time < 65%, increasing clock speed from 1611 MHz to 2255 MHz > idle time < 65%, increasing clock speed from 2255 MHz to 2579 MHz > idle time > 90%, decreasing clock speed from 2579 MHz to 2578 MHz > idle time > 90%, decreasing clock speed from 2579 MHz to 2578 MHz > idle time > 90%, decreasing clock speed from 2579 MHz to 2578 MHz > . > . > . > > $ sysctl dev.cpu > dev.cpu.0.%desc: ACPI CPU > dev.cpu.0.%driver: cpu > dev.cpu.0.%location: handle=\_PR_.CPU0 > dev.cpu.0.%pnpinfo: _HID=none _UID=0 > dev.cpu.0.%parent: acpi0 > dev.cpu.0.freq: 1289 > dev.cpu.0.freq_levels: 2579/-1 2578/-1 2255/-1 1933/-1 1611/-1 1289/-1 > 966/-1 644/-1 322/-1 > dev.cpu.0.cx_supported: C1/1 C2/1 C3/85 C4/185 > dev.cpu.0.cx_lowest: C3 > dev.cpu.0.cx_usage: 0.00% 100.00% 0.00% 0.00% > > $ sysctl dev.ichss > dev.ichss.0.%desc: SpeedStep ICH > dev.ichss.0.%driver: ichss > dev.ichss.0.%parent: cpu0 > dev.ichss.0.freq_settings: 2579/-1 2578/-1 > > The ichss levels looked odd to me, and trying to set cpufreq=2578 is a NOOP. > > $ sysctl dev.cpu.0.freq=2578 > dev.cpu.0.freq: 2579 -> 2579 > > I'm running 7_RELENG from about a week ago. dmesg.boot attached. > I disabled ichss with hint.ichss.0.disabled=1, and the broken freq setting is gone, and powerd operates without wedging. So, I guess the real culprit is a broken ichss on my box; however, powerd might want to check the value of freq after trying to set it instead of getting stuck. -- Russell A. Jackson <raj@csub.edu> Network Analyst California State University, Bakersfield If the meanings of "true" and "false" were switched, then this sentence would not be false. [-- Attachment #2 --] 0 *H 01 0 + 0 *H 00Р Ɋ;0 *H 01 0 UUS10U California10U Bakersfield110/U (California State University, Bakersfield10U Network Services1/0-U&CSU, Bakersfield Certificate Authority10 *H noc@csub.edu0 071012020640Z 081011020640Z01 0 UUS10U California10U Bakersfield110/U (California State University, Bakersfield10U Network Services10URussell A. 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