linux获取进程执行时间方法示例

#define BUFFER_SIZE 4 * 1024

int main()
{
int sc_clk_tck;
sc_clk_tck=sysconf(_SC_CLK_TCK);

struct tms begin_tms, end_tms;
clock_t begin, end;
system("date");
begin=times(&begin_tms);
sleep(2);
end=times(&end_tms);

printf("real time: %lf\n", (end - begin) / (double)sc_clk_tck);
printf("user time: %lf\n",
(end_tms.tms_utime - begin_tms.tms_utime) / (double)sc_clk_tck);
printf("sys time: %lf\n",
(end_tms.tms_stime - begin_tms.tms_stime) / (double)sc_clk_tck);
printf("child user time: %lf\n",
(end_tms.tms_cutime - begin_tms.tms_cutime) / (double)sc_clk_tck);
printf("child sys time: %lf\n",
(end_tms.tms_cstime - begin_tms.tms_cstime) / (double)sc_clk_tck);
return 0;
}

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