mirror of
https://github.com/irungentoo/toxcore.git
synced 2024-03-22 13:30:51 +08:00
39 lines
757 B
C
39 lines
757 B
C
|
#include <time.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <sys/time.h>
|
||
|
|
#include <sys/types.h>
|
||
|
|
#include <sys/sysctl.h>
|
||
|
|
|
||
|
|
static double cpufrequency = 0;
|
||
|
|
|
||
|
|
static void init(void)
|
||
|
|
{
|
||
|
|
FILE *f;
|
||
|
|
|
||
|
|
f = popen("hinv -c processor | awk '{if ($3==\"MHZ\") print $2*1000000}'","r");
|
||
|
|
if (!f) return;
|
||
|
|
if (fscanf(f,"%lf",&cpufrequency) < 1) cpufrequency = 0;
|
||
|
|
pclose(f);
|
||
|
|
if (!cpufrequency) return;
|
||
|
|
}
|
||
|
|
|
||
|
|
long long cpucycles_sgi(void)
|
||
|
|
{
|
||
|
|
double result;
|
||
|
|
struct timespec t;
|
||
|
|
if (!cpufrequency) init();
|
||
|
|
clock_gettime(CLOCK_SGI_CYCLE,&t);
|
||
|
|
result = t.tv_nsec;
|
||
|
|
result *= 0.000000001;
|
||
|
|
result += (double) t.tv_sec;
|
||
|
|
result *= cpufrequency;
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
long long cpucycles_sgi_persecond(void)
|
||
|
|
{
|
||
|
|
if (!cpufrequency) init();
|
||
|
|
return cpufrequency;
|
||
|
|
}
|