测试CPU使用情况

for.go

package main

import (
	"runtime"
)

func main() {
	runtime.GOMAXPROCS(runtime.NumCPU())

	forfunc := func() {
		for {
			a := 6
			a = a | a
		}
	}

	for i := 0; i < 32; i++ {
		go forfunc()
	}

	forfunc()
}