C++计算CPU/内存使用情况

Question

我有一个名为 ./blah 的 C++ 应用程序(我有它的源代码)

当我运行./blah

我可以运行“top”并查看“./blah”使用了多少内存和 cpu。

现在，“./blah”是否可以访问该信息本身？ IE。当我运行 ./blah 时，我希望它每秒转储它的 CPU 和内存使用情况。我应该使用哪个库来执行此操作？

我在 MacOSX 上；但我更喜欢也适用于 Linux 的解决方案。

谢谢!

Answer 1

您需要 getrusage()。来自man page :

int getrusage(int who, struct rusage *r_usage);

getrusage() returns information describing the resources utilized by the current process, or all its terminated child processes. The who parameter is eitherRUSAGE_SELF or RUSAGE_CHILDREN. The buffer to which r_usage points will be filled in with the following structure:

struct rusage {

         struct timeval ru_utime; /* user time used */
         struct timeval ru_stime; /* system time used */
         long ru_maxrss;          /* integral 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 */
 };