From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 86461] intel_pstate does not obey min/max frequencies set by
user
Date: Fri, 17 Oct 2014 16:43:39 +0000
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https://bugzilla.kernel.org/show_bug.cgi?id=86461
--- Comment #2 from Alexander E. Patrakov ---
aep-vaio turbostat # ./turbostat sleep 5
Core CPU Avg_MHz %Busy Bzy_MHz TSC_MHz SMI CPU%c1 CPU%c3
CPU%c6 CPU%c7 CoreTmp PkgTmp Pkg%pc2 Pkg%pc3 Pkg%pc6 Pkg%pc7 PkgWatt CorWatt
GFXWatt
- - 32 2.47 1298 2794 0 5.02 0.04
0.00 92.47 50 50 3.79 0.02 4.49 77.75 4.43 0.74
0.45
0 0 37 2.97 1253 2794 0 6.90 0.07
0.00 90.06 50 50 3.79 0.02 4.49 77.75 4.43 0.74
0.45
0 1 33 2.11 1558 2794 0 7.77
1 2 27 3.05 895 2794 0 2.06 0.00
0.00 94.89 50
1 3 31 1.76 1763 2794 0 3.35
5.004419 sec
aep-vaio turbostat # grep MH /proc/cpuinfo
cpu MHz : 951.781
cpu MHz : 835.625
cpu MHz : 852.468
cpu MHz : 822.500
aep-vaio turbostat # grep . /sys/devices/system/cpu/intel_pstate/*
/sys/devices/system/cpu/intel_pstate/max_perf_pct:100
/sys/devices/system/cpu/intel_pstate/min_perf_pct:22
/sys/devices/system/cpu/intel_pstate/no_turbo:0
aep-vaio turbostat # echo 2400000 | tee
/sys/devices/system/cpu/cpu*/cpufreq/scaling_min_freq
2400000
aep-vaio turbostat # ./turbostat sleep 5
Core CPU Avg_MHz %Busy Bzy_MHz TSC_MHz SMI CPU%c1 CPU%c3
CPU%c6 CPU%c7 CoreTmp PkgTmp Pkg%pc2 Pkg%pc3 Pkg%pc6 Pkg%pc7 PkgWatt CorWatt
GFXWatt
- - 39 1.74 2229 2794 0 4.47 0.51
0.00 93.27 53 53 4.40 0.23 5.35 77.63 4.48 0.87
0.37
0 0 48 2.42 1981 2794 0 2.50 0.61
0.00 94.47 53 53 4.40 0.23 5.35 77.63 4.48 0.87
0.37
0 1 13 0.78 1727 2794 0 4.14
1 2 45 1.84 2420 2794 0 5.66 0.42
0.00 92.08 53
1 3 50 1.93 2560 2794 0 5.57
5.001705 sec
aep-vaio turbostat # grep MH /proc/cpuinfo
cpu MHz : 1277.390
cpu MHz : 1711.718
cpu MHz : 1661.734
cpu MHz : 1932.875
aep-vaio turbostat # grep . /sys/devices/system/cpu/intel_pstate/*
/sys/devices/system/cpu/intel_pstate/max_perf_pct:100
/sys/devices/system/cpu/intel_pstate/min_perf_pct:68
/sys/devices/system/cpu/intel_pstate/no_turbo:0
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