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InvisibleShadowGhost
Asked: 2018-08-11 11:45:43 +0800 CST

cpufrequtils 可用频率

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/etc/init.d/cpufrequtils 有以下注释

 and which limits to set. Both MIN_SPEED and MAX_SPEED must be values
 listed in:
   cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies
 a value of 0 for any of the two variables will disabling the use of 
 that limit variable.

但是文件 /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies 对我来说不存在吗？你有吗？我在哪里可以获得合适的频率？

此致

cpu

1 个回答

  1. Best Answer

    英特尔已停止发布可用频率，但您可以大致了解它们：

    使用这些命令查看可用步数和最小/最大：

    $ cd /sys/devices/system/cpu/intel_pstate
$ paste <(ls *) <(cat *) | column -s $'\t' -t
max_perf_pct  100
min_perf_pct  22
no_turbo      0
num_pstates   28
status        active
turbo_pct     33

$ cd /sys/devices/system/cpu/cpu0/cpufreq
$ paste <(ls *) <(cat *) | column -s $'\t' -t
affected_cpus                             0
cpuinfo_max_freq                          3500000
cpuinfo_min_freq                          800000
cpuinfo_transition_latency                4294967295
energy_performance_available_preferences  default performance balance_performance balance_power power 
energy_performance_preference             balance_performance
related_cpus                              0
scaling_available_governors               performance powersave
scaling_cur_freq                          1939478
scaling_driver                            intel_pstate
scaling_governor                          powersave
scaling_max_freq                          3500000
scaling_min_freq                          800000
scaling_setspeed                          <unsupported>

    根据我刚刚在 Stack Exchange 上发布的答案：获取所有可用的频率步长，将此功能复制并粘贴到您的终端中：

    ApproximateFrequencies () {
    NumSteps=$(cat /sys/devices/system/cpu/intel_pstate/num_pstates)
    MinFreq=$(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq)
    MaxFreq=$(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq)
    LastFreq=$MinFreq
    StepRate=$((( $MaxFreq - $MinFreq ) / $NumSteps))
    for ((n=0;n<=$NumSteps;n++)); do
        echo $LastFreq
        LastFreq=$(( $LastFreq + $StepRate))
    done
}

    然后用它来显示频率：

    $ ApproximateFrequencies | column
800000  1089284 1378568 1667852 1957136 2246420 2535704 2824988 3114272 3403556
896428  1185712 1474996 1764280 2053564 2342848 2632132 2921416 3210700 3499984
992856  1282140 1571424 1860708 2149992 2439276 2728560 3017844 3307128

    如果您尚未column安装，则省略| column部分命令。

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