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
r...@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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