Function cpu_util

src/iperf_util.c:189–224

}

void
cpu_util(double pcpu[3])
{
    static struct iperf_time last;
    static clock_t clast;
    static struct rusage rlast;
    struct iperf_time now, temp_time;
    clock_t ctemp;
    struct rusage rtemp;
    double timediff;
    double userdiff;
    double systemdiff;

    if (pcpu == NULL) {
        iperf_time_now(&last);
        clast = clock();
	getrusage(RUSAGE_SELF, &rlast);
        return;
    }

    iperf_time_now(&now);
    ctemp = clock();
    getrusage(RUSAGE_SELF, &rtemp);

    iperf_time_diff(&now, &last, &temp_time);
    timediff = iperf_time_in_usecs(&temp_time);

    userdiff = ((rtemp.ru_utime.tv_sec * 1000000.0 + rtemp.ru_utime.tv_usec) -
                (rlast.ru_utime.tv_sec * 1000000.0 + rlast.ru_utime.tv_usec));
    systemdiff = ((rtemp.ru_stime.tv_sec * 1000000.0 + rtemp.ru_stime.tv_usec) -
                  (rlast.ru_stime.tv_sec * 1000000.0 + rlast.ru_stime.tv_usec));

    pcpu[0] = (((ctemp - clast) * 1000000.0 / CLOCKS_PER_SEC) / timediff) * 100;
    pcpu[1] = (userdiff / timediff) * 100;
    pcpu[2] = (systemdiff / timediff) * 100;
}

const char *
get_system_info(void)