tools/lib/api/cpu.c

   1 #include <stdio.h>
   2
   3 #include "cpu.h"
   4 #include "fs/fs.h"
   5
   6 int cpu__get_max_freq(unsigned long long *freq)
   7 {
   8         char entry[PATH_MAX];
   9         int cpu;
  10
  11         if (sysfs__read_int("devices/system/cpu/online", &cpu) < 0)
  12                 return -1;
  13
  14         snprintf(entry, sizeof(entry),
  15                  "devices/system/cpu/cpu%d/cpufreq/cpuinfo_max_freq", cpu);
  16
  17         return sysfs__read_ull(entry, freq);
  18 }