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| en:multiasm:paarm:chapter_5_15 [2025/12/08 12:33] – eriks.klavins | en:multiasm:paarm:chapter_5_15 [2026/05/27 09:55] (current) – ktokarz | ||
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| On a Raspberry Pi 5 running Linux, it is not observable whether the CPU enters these modes, because the OS generates many events between CPU cores and also handles many interrupts from communication interfaces and other Raspberry Pi components. | On a Raspberry Pi 5 running Linux, it is not observable whether the CPU enters these modes, because the OS generates many events between CPU cores and also handles many interrupts from communication interfaces and other Raspberry Pi components. | ||
| - | Another way to save more energy while running the OS on the Raspberry Pi is to reduce the CPU clock frequency. There is a scheme called dynamic voltage and frequency scaling (DVFS), the same technique used in laptops, that reduces power consumption and thereby increases battery life. On the internet, there is a paper named “Cooling a Raspberry Pi Device ”. The paper includes one chapter explaining how to reduce the CPU clock frequency. The Linux OS exposes CPU frequency scaling through sysfs, e.g.: | + | Another way to save more energy while running the OS on the Raspberry Pi is to reduce the CPU clock frequency. There is a scheme called dynamic voltage and frequency scaling (DVFS), the same technique used in laptops, that reduces power consumption and thereby increases battery life. On the internet, there is a paper named “Cooling a Raspberry Pi Device”. The paper includes one chapter explaining how to reduce the CPU clock frequency. The Linux exposes CPU frequency scaling through sysfs, e.g.: |
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