Go协程

package main
import (
	"fmt"
	"strconv"
	"time"
)

func test() {

	for i := 1; i <= 10; i++ {
		fmt.Println("tesst,hello,world " + strconv.Itoa(i))
		time.Sleep(time.Second)
	}
}

func main() {
	go test() // 开启了一个协程
	for i := 1; i <= 10; i++ {
		fmt.Println(" main,hello,golang" + strconv.Itoa(i))
		time.Sleep(time.Second)
	}
}

package main
import (
	"runtime"
	"fmt"
)

func main() {
	cpuNum := runtime.NumCPU()
	fmt.Println("cpuNum=", cpuNum)

	//可以自己设置使用多个cpu
	runtime.GOMAXPROCS(cpuNum - 1)
	fmt.Println("ok")
}