进程资源信息 struct rusage
进程资源信息 struct rusage
include
利用getrusage可以得到进程的相关资源信息。如:用户开销时间,系统开销时间,接收的信号量等等;
下面是rusage的结构:
struct rusage {
struct timeval ru_utime; /* user time used */
struct timeval ru_stime; /* system time used */
long ru_maxrss;
#define ru_first ru_ixrss
long ru_ixrss; /* XXX: 0 */
long ru_idrss; /* XXX: sum of rm_asrss */
long ru_isrss; /* XXX: 0 */
long ru_minflt; /* any page faults not requiring I/O */
long ru_majflt; /* any page faults requiring I/O */
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 ” */
#define ru_last ru_nivcsw
};
如果参数RUSAGE_SELF,则得到的是当前进程的资源信息。如果是RUSAGE_CHILDREN,则将返回当进程的终止掉的子进程和等待子进程的资源信息。当调用成功后,返回0,否则-1;
下面是一个例子:
istruct rusage usage;
igetrusage(RUSAGE_SELF, &usage);
这样你就可以用usage获取你想要的东西了;
同样wait3()和wait4()两个函数也可以得到进程资源信息