sysdevicessystemcpucpucpufreq

sysdevicessystemcpucpucpufreq refers to a specific path within the sysfs filesystem on Linux-based operating systems. This path provides access to information and control mechanisms related to the CPU frequency scaling of the system's processors.

The sysfs filesystem, also known as the virtual filesystem, presents kernel objects and their attributes to user-space applications. Navigating through sysfs allows administrators and programs to inspect and sometimes modify the behavior of hardware and software components. The structure sysdevicessystemcpucpucpufreq is a hierarchical representation of these components.

Breaking down the path, "sys" indicates the root of the sysfs filesystem. "devices" is a general directory within sysfs. "system" typically points to system-wide devices. "cpu" indicates the CPU subsystem. The subsequent "cpu" entries, often numbered (e.g., cpu0, cpu1), refer to individual CPU cores. Finally, "cpufreq" is the directory containing files that manage the CPU frequency for that specific core.

Within the cpufreq directory, users can find files like "scaling_governor" to set the CPU frequency scaling policy (e.g., 'performance', 'powersave'), "scaling_max_freq" to set the maximum allowed frequency, and "scaling_min_freq" to set the minimum allowed frequency. Other files may provide information about the available frequencies and the current operating frequency. This mechanism is crucial for power management and performance tuning.