I am using a laptop with Intel Ivy bridge core i7 3610QM. I updated my
kernel to 3.10 and started to use intel_pstate as scaling driver:
#cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver
intel_pstate
However I find that one of my four cores is always in C0 state even when
there is no activities. I monitored it using i7z:
Core [core-id] :Actual Freq (Mult.) C0% Halt(C1)% C3 % C6 %
C7 % Temp
Core 1 [0]: 3288.24 (32.97x) 99.7 0 0
0 0 83
Core 2 [1]: 3138.62 (31.47x) 1 0 0
0 99.7 74
Core 3 [2]: 3175.46 (31.84x) 1 0.891 0
0 99 76
Core 4 [3]: 3177.34 (31.86x) 1 0.21 0
0 99.3 71
Also cpu frequencies never scale down, resulting in very high temp.
#cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
powersave
It does say powersave, and my cpu is capable of 1.20Ghz to 3.30Ghz
I don't know if I misconfigured or misunderstood something. Can someone
tell me why?
Thanks!
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