43 lines
1.0 KiB
C
43 lines
1.0 KiB
C
#include "cpumonitor.h"
|
|
|
|
int _cpumonitor_proc_getusage(Instance *inst)
|
|
{
|
|
long total = 0, i = 0, idle = 0, use, total_change, idle_change;
|
|
int percent = 0;
|
|
char buf[4096], *line, *tok;
|
|
FILE *f;
|
|
|
|
f = fopen("/proc/stat", "r");
|
|
if (f)
|
|
{
|
|
if (fgets(buf, sizeof(buf), f) == NULL)
|
|
{
|
|
fclose(f);
|
|
return 0;
|
|
}
|
|
fclose(f);
|
|
|
|
line = strchr(buf, ' ')+1;
|
|
tok = strtok(line, " ");
|
|
while (tok)
|
|
{
|
|
use = atol(tok);
|
|
total += use;
|
|
i++;
|
|
if (i == 4)
|
|
idle = use;
|
|
tok = strtok(NULL, " ");
|
|
}
|
|
}
|
|
total_change = total - inst->cfg->cpumonitor.total;
|
|
idle_change = idle - inst->cfg->cpumonitor.idle;
|
|
if (total_change != 0)
|
|
percent = 100 * (1 - ((float)idle_change / (float)total_change));
|
|
if (percent > 100) percent = 100;
|
|
else if (percent < 0) percent = 0;
|
|
inst->cfg->cpumonitor.total = total;
|
|
inst->cfg->cpumonitor.idle = idle;
|
|
|
|
return percent;
|
|
}
|