How to get CPU usage

Question

My Go program needs to know the current cpu usage percentage of all system and user processes.

How can I obtain that?

Answer 1

Check out this package http://github.com/c9s/goprocinfo, goprocinfo package does the parsing stuff for you.

stat, err := linuxproc.ReadStat("/proc/stat")
if err != nil {
    t.Fatal("stat read fail")
}

for _, s := range stat.CPUStats {
    // s.User
    // s.Nice
    // s.System
    // s.Idle
    // s.IOWait
}