xyproto/gionice

Port of ionice to Go

gionice

This is an port of the core parts of the ionice utility from util-linux, to a Go module, without using cgo.

The command line utility easy (a drop-in replacement for ionice), uses this module.

This package can be used by any Go program that wishes to run without taking up the I/O capabilities of the current system.

Example use

To make your own Go program run as "idle" and not hog the I/O capabilities of the system, simply call ionice.Idle():

package main

import (
	"io/ioutil"
	"os"

	"github.com/xyproto/gionice"
)

func main() {
	// Make the current process group priority to be "idle" (level 7)
	gionice.Idle()

	// Generate I/O activity
	for {
		_ = ioutil.WriteFile("frenetic.dat", []byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, 0644)
		_ = os.Remove("frenetic.dat")
	}
}

By using iotop it's easy to check that the process PRIO is now idle.

See the cmd/supernice example for how to make a Go program have a lower priority both when it comes to I/O and CPU.

General info

• Version: 1.3.0
• License: GPL2
• Author: Alexander F. Rødseth <[email protected]>