How to Get Detailed CPU Usage in Go?

Determining CPU Usage: A Go Language Perspective

Obtaining the current CPU usage percentage of both system and user processes is a common requirement in Go programming. To address this need, we can leverage the goprocinfo package, which provides a robust and convenient solution.

The goprocinfo package handles the intricate parsing of system parameters, making it easier to retrieve CPU usage information. Here's how to use it:

package main

import (
    "fmt"

    "github.com/c9s/goprocinfo/linuxproc"
)

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

    for _, s := range stat.CPUStats {
        fmt.Println("CPU usage:")
        fmt.Printf("User:    %.2f%%\n", s.User)
        fmt.Printf("Nice:    %.2f%%\n", s.Nice)
        fmt.Printf("System:  %.2f%%\n", s.System)
        fmt.Printf("Idle:    %.2f%%\n", s.Idle)
        fmt.Printf("IOWait:  %.2f%%\n", s.IOWait)
    }
}

This code retrieves and prints the CPU usage percentages for various categories, including user, nice, system, idle, and IOWait. By leveraging the goprocinfo package, we have simplified the process of obtaining comprehensive CPU usage data in Go.

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