Hi Rafael, Sorry for the delay, but I didn't notice until today that this commit causes a regression, at least in my computer.
I have not figured out exactly what is wrong, as I must admit I am finding these policy interactions difficult to follow. On 2017.03.02 14:29 Rafael J. Wysocki wrote: >From: Rafael J. Wysocki <rafael.j.wyso...@intel.com> > > If the current P-state selection algorithm is set to "performance" > in intel_pstate_set_policy(), the limits may be initialized from ... [cut] ... Going back to kernel 4.11-rc1 I get this after boot**: $ uname -a Linux s15 4.11.0-rc1-stock #217 SMP Sun Mar 5 15:34:38 PST 2017 x86_64 x86_64 x86_64 GNU/Linux $ grep . /sys/devices/system/cpu/intel_pstate/* /sys/devices/system/cpu/intel_pstate/max_perf_pct:100 <<< Correct /sys/devices/system/cpu/intel_pstate/min_perf_pct:43 <<< Correct /sys/devices/system/cpu/intel_pstate/no_turbo:0 /sys/devices/system/cpu/intel_pstate/num_pstates:23 /sys/devices/system/cpu/intel_pstate/status:active /sys/devices/system/cpu/intel_pstate/turbo_pct:18 $ grep . /sys/devices/system/cpu/cpu0/cpufreq/* /sys/devices/system/cpu/cpu0/cpufreq/affected_cpus:0 grep: /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq: Permission denied /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq:3800000 <<< Correct /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq:1600000 <<< Correct /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_transition_latency:4294967295 /sys/devices/system/cpu/cpu0/cpufreq/related_cpus:0 /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors:performance powersave /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq:1600805 /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver:intel_pstate /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor:powersave <<< Notice /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq:3800000 <<< Correct /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq:1600000 <<< Correct /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed:<unsupported> $ sudo rdmsr --bitfield 15:8 -d -a 0x199 <<< Requested P-States 16 16 17 17 16 16 16 16 Going back to kernel 4.11-rc2 I get this after boot**: ~$ uname -a Linux s15 4.11.0-rc2-stock #218 SMP Sun Mar 12 23:57:44 PDT 2017 x86_64 x86_64 x86_64 GNU/Linux $ grep . /sys/devices/system/cpu/intel_pstate/* /sys/devices/system/cpu/intel_pstate/max_perf_pct:100 <<< Correct /sys/devices/system/cpu/intel_pstate/min_perf_pct:100 <<< Incorrect /sys/devices/system/cpu/intel_pstate/no_turbo:0 /sys/devices/system/cpu/intel_pstate/num_pstates:23 /sys/devices/system/cpu/intel_pstate/status:active /sys/devices/system/cpu/intel_pstate/turbo_pct:18 $ grep . /sys/devices/system/cpu/cpu0/cpufreq/* /sys/devices/system/cpu/cpu0/cpufreq/affected_cpus:0 grep: /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq: Permission denied /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq:3800000 <<< Correct /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq:1600000 <<< Correct /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_transition_latency:4294967295 /sys/devices/system/cpu/cpu0/cpufreq/related_cpus:0 /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors:performance powersave /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq:1600805 /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver:intel_pstate /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor:powersave <<< Notice /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq:3800000 <<< Correct /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq:3800000 <<< Incorrect /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed:<unsupported> $ sudo rdmsr --bitfield 15:8 -d -a 0x199 <<< Requested P-States 38 <<<< All are pinned, system is idle 38 38 38 38 38 38 38 **: After boot means > 1 minute after boot, because my distro (Ubtunu) starts up using the performance governor and then changes to powersave after 1 minute. ... Doug
