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kokoko3k

Member

Registered: 2008-11-14

Posts: 2,464

atom n280 drains less power with performance governor idling?

kokonicki@netbook ~ $ while true ; do echo "------------------" ; echo "perf:" ; sudo cpufreq-set -c0 -g performance ; sudo cpufreq-set -c1 -g performance ; sleep 10 ; acpi ; echo save ; sudo cpufreq-set -c0 -g powersave ; sudo cpufreq-set -c1 -g powersave ; sleep 10 ; acpi ; echo "ondemand:" ; sudo cpufreq-set -c0 -g ondemand ; sudo cpufreq-set -c1 -g ondemand ; sleep 10 ; acpi ; done
------------------
perf:
Battery 0: Discharging, 95%, 12:42:46 remaining
save
Battery 0: Discharging, 95%, 10:45:55 remaining
ondemand:
Battery 0: Discharging, 95%, 10:33:51 remaining
------------------
perf:
Battery 0: Discharging, 95%, 11:21:32 remaining
save
Battery 0: Discharging, 95%, 11:05:47 remaining
ondemand:
Battery 0: Discharging, 95%, 11:33:40 remaining
------------------
perf:
Battery 0: Discharging, 95%, 11:37:16 remaining
save
Battery 0: Discharging, 95%, 10:53:53 remaining
ondemand:
Battery 0: Discharging, 95%, 11:07:30 remaining
------------------
perf:
Battery 0: Discharging, 95%, 12:11:41 remaining
save
Battery 0: Discharging, 95%, 11:47:00 remaining
ondemand:
Battery 0: Discharging, 95%, 10:22:10 remaining
------------------

Sorry if i still use cpufreq-*, i'm used to it.
Anyway, do you see what i'm seeing? the performance governor seems the most efficient.
And during the test the cpu was just idling!

Somebody has an explaination?

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