times函数的问题哦

CanuxCheng

int main(int argc, char **argv)
{
        clock_t stime, etime;
        struct tms sbuf, ebuf;
        int status;
        static long clktck = 0;

        if ((stime = times(&sbuf)) == -1)
                err_sys("times error");
        if ((status = system("sleep 1; pwd")) < 0)
                err_sys("system error");
        if ((etime = times(&ebuf)) == -1)
                err_sys("times error");
       
        clktck = sysconf(_SC_CLK_TCK);
        printf("rtime: %7.2f\n", (etime-stime)/(double)clktck);
        printf("utime: %7.2f\n", (ebuf.tms_utime - sbuf.tms_utime)/(double)clktck);
        printf("stime: %7.2f\n", (ebuf.tms_stime - sbuf.tms_stime)/(double)clktck);
        printf("cutime: %7.2f\n", (ebuf.tms_cutime - sbuf.tms_cutime)/(double)clktck);
        printf("cstime: %7.2f\n", (ebuf.tms_cstime - sbuf.tms_cstime)/(double)clktck);

        exit(0);
}



平安夜一点不平安，呵呵，为啥只有rtime是对的，stime和utime都是0呢？？？

CrazyBoy_P

utime的意思是进程消耗cpu的时间；stime是消耗系统的时间。详细例子见：
blog.sina.com.cn/s/blog_590be5290100nctf.html