CPUTimeDiff returns the differences of user CPU time and system CPU time used between two Rusage structs.

GetCPUTime returns the how much CPU time has passed since the start of this process.

GetRusage returns the resource usage of current process.

GetTCPUserTimeout gets the TCP user timeout on a connection's socket.

SetTCPUserTimeout sets the TCP user timeout on a connection's socket.

Rusage is an alias for syscall.Rusage under linux environment.