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blog:2022:2022-01-13 [2022-01-13 21:36] Decomo 作成 |
blog:2022:2022-01-13 [2022-03-23 11:51] Decomo |
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強制的にアクティブモードにすることもできそうだが、どっちがいいんだろうねぇ?更にHWPM (Hardware Power Management)を使って、完全にハードウェア任せにするという選択肢もあるし悩ましいところ。 | 強制的にアクティブモードにすることもできそうだが、どっちがいいんだろうねぇ?更にHWPM (Hardware Power Management)を使って、完全にハードウェア任せにするという選択肢もあるし悩ましいところ。 | ||
+ | |||
+ | ---- | ||
+ | **(2022-02-21 追記)** | ||
+ | |||
+ | うちのマシンの場合アイドル時の消費電力は、やはりアクティブモードの方が気持ち低いようだ。 | ||
+ | |||
+ | アクティブモードとパッシブモードの切り替えは''/ | ||
+ | |||
+ | < | ||
+ | # cpupower frequency-info | ||
+ | analyzing CPU 0: | ||
+ | driver: intel_cpufreq | ||
+ | CPUs which run at the same hardware frequency: 0 | ||
+ | CPUs which need to have their frequency coordinated by software: 0 | ||
+ | maximum transition latency: 20.0 us | ||
+ | hardware limits: 1.20 GHz - 3.30 GHz | ||
+ | available cpufreq governors: conservative ondemand userspace powersave performance schedutil | ||
+ | current policy: frequency should be within 1.20 GHz and 3.30 GHz. | ||
+ | The governor " | ||
+ | within this range. | ||
+ | current CPU frequency: Unable to call hardware | ||
+ | current CPU frequency: 1.30 GHz (asserted by call to kernel) | ||
+ | boost state support: | ||
+ | Supported: yes | ||
+ | Active: yes | ||
+ | |||
+ | # echo active > / | ||
+ | |||
+ | # cpupower frequency-info | ||
+ | analyzing CPU 0: | ||
+ | driver: intel_pstate | ||
+ | CPUs which run at the same hardware frequency: 0 | ||
+ | CPUs which need to have their frequency coordinated by software: 0 | ||
+ | maximum transition latency: | ||
+ | hardware limits: 1.20 GHz - 3.30 GHz | ||
+ | available cpufreq governors: performance powersave | ||
+ | current policy: frequency should be within 1.20 GHz and 3.30 GHz. | ||
+ | The governor " | ||
+ | within this range. | ||
+ | current CPU frequency: Unable to call hardware | ||
+ | current CPU frequency: 1.20 GHz (asserted by call to kernel) | ||
+ | boost state support: | ||
+ | Supported: yes | ||
+ | Active: yes | ||
+ | </ | ||
====== 参考サイト ====== | ====== 参考サイト ====== | ||
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* [[https:// | * [[https:// | ||
* [[https:// | * [[https:// | ||
+ | * [[https:// |