什么函数能知道CPU和内存的占用率？

问号

1. void
   
2. Pr_cpu_time (void)
   
3. {
   
4.   double user, sys;
   
5.   struct rusage myusage, childusage;
   
6. 
   
7.   if (getrusage (RUSAGE_SELF, &myusage) < 0)
   
8.     Err_sys ("getusage error");
   
9.   if (getrusage (RUSAGE_CHILDREN, &childusage) < 0)
   
10.     Err_sys ("getusage error");
    
11. 
    
12.   user = (double) myusage.ru_utime.tv_sec +
    
13.     myusage.ru_utime.tv_usec / 1000000.0;
    
14.   user += (double) childusage.ru_utime.tv_sec +
    
15.     childusage.ru_utime.tv_usec / 1000000.0;
    
16.   sys = (double) myusage.ru_utime.tv_sec +
    
17.     myusage.ru_utime.tv_usec / 1000000.0;
    
18.   sys += (double) childusage.ru_utime.tv_sec +
    
19.     childusage.ru_utime.tv_usec / 1000000.0;
    
20. 
    
21.   printf ("\nuser time = %g, sys time = %g\n", user, sys);
    
22. }

复制代码

U can use these code to get CPU usage, for memory, i dunno by now