loop.go

package main

import (
	"fmt"
	"runtime"
	"time"
)

func main() {
	// THIS is totally required; without it, you're blocking the CPU regardless
	// of whether you use LockOSThread or not.
	runtime.GOMAXPROCS(4)

	// arbitrary CPU-blocking function
	go func() {
		// THIS appears to be optional; I'm not really sure how this works.
		// runtime.LockOSThread()
		x := 0
		for {
			x += 1
		}
	}()

	for {
		fmt.Println("hey")
		time.Sleep(time.Second)
	}
}