On (09/20/13 09:52), Christian Krause wrote:
Dear PowerTop Developers,
I have been wondering for a while and just found out:
tunables show:
Bad Using 'ondemand' cpufreq governor
but: I don't have a ondemand cpufreq governor -- that is what I just found out: since
some kernel
versions ago the intel_pstate driver is the default for my cpu:
Hello,
I'll take a look, thanks.
-ss
# zgrep PSTATE /proc/config.gz
CONFIG_X86_INTEL_PSTATE=y
# cat /sys/devices/system/cpu/cpu[0-9]*/cpufreq/scaling_driver
intel_pstate
intel_pstate
intel_pstate
intel_pstate
intel_pstate does not provide ondemand governor, just powersave and performance. It saves
power by
putting the cpu in sleep mode instead of decreasing the frequency, see idle stats: C7-SNB
98.7% ...
Please include a check in PowerTop so ondemand governor does not get suggested for
intel_pstate.
That was really confusing at first to have powertop suggest that but me not having
ondemand
governor.
--
Mit freundlichen Grüßen /
With kind regards
-------------------------------------------
Christian Krause
Wissenschaftliche und Kaufmännische Datenverarbeitung /
Scientific and Commercial Data Processing (WKDV)
Wissenschaftliches Rechnen und Wissenschaftliches Datenmanagement /
Scientific Computing and Scientific Data Management (WRWD)
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phone +49 341 235 1001 / fax +49 341 235 1468
<christian.krause(a)ufz.de> / <
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