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Implement scaling for cpu_freq

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This commit is contained in:
Aaron Marcher 2018-05-19 23:58:14 +02:00
parent 46c4540dd2
commit 0bc6855741
1 changed files with 13 additions and 5 deletions
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18
components/cpu.c
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@ -6,14 +6,21 @@
#include "../util.h" #include "../util.h"
#if defined(__linux__) #if defined(__linux__)
#include <inttypes.h>
#include <stdint.h>
const char * const char *
cpu_freq(void) cpu_freq(void)
{ {
int freq; uint64_t freq;
return (pscanf("/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq", /* in kHz */
"%d", &freq) == 1) ? if (pscanf("/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq",
bprintf("%d", (freq + 500) / 1000) : NULL; "%"SCNu64, &freq) != 1) {
return NULL;
}
return fmt_human_10(freq * 1000, "Hz");
} }
const char * const char *
@ -56,12 +63,13 @@
size = sizeof(freq); size = sizeof(freq);
/* in MHz */
if (sysctl(mib, 2, &freq, &size, NULL, 0) < 0) { if (sysctl(mib, 2, &freq, &size, NULL, 0) < 0) {
warn("sysctl 'HW_CPUSPEED':"); warn("sysctl 'HW_CPUSPEED':");
return NULL; return NULL;
} }
return bprintf("%d", freq); return fmt_human_10((size_t)freq * 1000 * 1000, "Hz");
} }
const char * const char *