Date: Sun, 29 Mar 2009 13:34:33 +0300 From: Alexander Motin <mav@FreeBSD.org> To: Dominic Fandrey <kamikaze@bsdforen.de> Cc: freebsd-stable@freebsd.org Subject: Re: powerd broken Message-ID: <49CF4EB9.60108@FreeBSD.org> In-Reply-To: <49CF2F8D.6000905@bsdforen.de> References: <1238293386.00093672.1238281804@10.7.7.3> <49CF0803.1070505@FreeBSD.org> <49CF2F8D.6000905@bsdforen.de>
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Dominic Fandrey wrote: > Alexander Motin wrote: >> Dominic Fandrey wrote: >>> Since I updated to the 7.2 prerelease, powerd is broken. >>> >>>> uname -a >>> FreeBSD mobileKamikaze.norad 7.2-PRERELEASE FreeBSD 7.2-PRERELEASE #0: >>> Tue Mar 24 07:57:30 CET 2009 >>> root@mobileKamikaze.norad:/usr/obj/HP6510b/amd64/usr/src/sys/HP6510b >>> amd64 >>> >>> It increases the CPU frequency very aggressively in adaptive mode. >>> That means full speed with a system load below 1%. I have to use the >>> following nonsensical powerd_flags to make it work sensibly: >>> -a adaptive -b minimum -i 95 -r 99 >>> >>> The system is a Core2 Duo, if that is of any help. >> Run powerd in foreground with -v option to get it's work trace. If it >> reaches full speed, there must be some reason to do it. >> >> Updated powerd indeed may behave a bit more aggressively (especially in >> new hiadaptive mode, default for AC power). But it was made several >> months ago and nobody have complained yet. I am personally using it on >> 8-CURRENT on my Core2Duo laptop every day. >> > > # grep powerd /etc/rc.conf > powerd_enable="YES" > #powerd_flags="-a adaptive -b minimum -i 95 -r 99" > powerd_flags="-a adaptive -b minimum -v" > # rcrestart powerd > powerd not running? > Starting powerd. > powerd: using sysctl for AC line status > powerd: using devd for AC line status > load 77%, current freq 2400 MHz ( 0), wanted freq 2400 MHz > load 74%, current freq 2400 MHz ( 0), wanted freq 2400 MHz > load 78%, current freq 2400 MHz ( 0), wanted freq 2400 MHz > load 79%, current freq 2400 MHz ( 0), wanted freq 2400 MHz > load 65%, current freq 2400 MHz ( 0), wanted freq 2400 MHz > load 72%, current freq 2400 MHz ( 0), wanted freq 2400 MHz > load 76%, current freq 2400 MHz ( 0), wanted freq 2400 MHz > ... > > The real load was between 3 and 7 % while these were recorded. > > Note that I use the normal/old adaptive mode. Reason is not in algorithm. Reason is in reporting so high load (65-79%). Run this test please at the same conditions to understand what's going on there: sysctl kern.cp_times && sleep 1 && \ sysctl kern.cp_times && sleep 1 && \ sysctl kern.cp_times && sleep 1 && \ sysctl kern.cp_times -- Alexander Motin
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