https://github.com/yaowenxu/Workplace/blob/master/timer/getrusagetimer.c
关键结构体：
代码语言：javascript复制struct rusage {
struct timeval ru_utime; /* user time used */
struct timeval ru_stime; /* system time used */
long ru_maxrss; /* max resident set size */
long ru_ixrss; /* integral shared text memory size */
long ru_idrss; /* integral unshared data size */
long ru_isrss; /* integral unshared stack size */
long ru_minflt; /* page reclaims */
long ru_majflt; /* page faults */
long ru_nswap; /* swaps */
long ru_inblock; /* block input operations */
long ru_oublock; /* block output operations */
long ru_msgsnd; /* messages sent */
long ru_msgrcv; /* messages received */
long ru_nsignals; /* signals received */
long ru_nvcsw; /* voluntary context switches */
long ru_nivcsw; /* involuntary context switches */
};程序：
代码语言：javascript复制/**
* Author: Yaowen Xu
* Github: https://github.com/yaowenxu
* Organization: 北航系统结构研究所
* Date: 2019-08-18 13:31:34
* LastEditTime: 2019-08-18 13:51:26
* Description: 使用系统 函数 getrusage 获取程序运行相关信息
* 此程序主要是关注与总时间和内核空间运行时间与用户
* 空间运行时间，使用此函数可大致对程序运行时间计算；
* 查看: 具体使用信息可以在控制台以 man getrusage 命令查看
*/
#include <stdio.h>
#include <math.h>
#include <sys/time.h>
#include <sys/resource.h>
int str2int(char* str){
char *p = str;
int sum = 0;
while (*p != ' ')
{
sum = sum*10 (*p-'0');
p ;
}
return sum;
}
int main(int argc, char* argv[]){
int def = 1000;
if (argc == 2)
{
def = str2int(argv[argc-1]);
}
for (int i = 0; i < def ; i )
{
float tmp = sqrt(i);
}
struct rusage usage;
getrusage(RUSAGE_SELF, &usage);
//getrusage(RUSAGE_CHILDREN, &usage);
long user = usage.ru_utime.tv_sec * 1000000 usage.ru_utime.tv_usec; // user time used
long sys = usage.ru_stime.tv_sec * 1e6 usage.ru_stime.tv_usec; // sys time used
printf("User: %ld usn", user); // 用户空间使用的时间
printf("Sys: %ld usn", sys); // 内核空间使用的时间
printf("Total: %ld usn", user sys); // 总共使用的时钟
return 0;
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