tools/lib/api/cpu.c

Source file repositories/reference/linux-study-clean/tools/lib/api/cpu.c

File Facts

System
Linux kernel
Corpus path
tools/lib/api/cpu.c
Extension
.c
Size
387 bytes
Lines
20
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
#include <stdio.h>

#include "cpu.h"
#include "fs/fs.h"

int cpu__get_max_freq(unsigned long long *freq)
{
	char entry[PATH_MAX];
	int cpu;

	if (sysfs__read_int("devices/system/cpu/online", &cpu) < 0)
		return -1;

	snprintf(entry, sizeof(entry),
		 "devices/system/cpu/cpu%d/cpufreq/cpuinfo_max_freq", cpu);

	return sysfs__read_ull(entry, freq);
}

Annotation

Implementation Notes