source: benchmark/ctxswitch/goroutine.go

package main

import (
        "fmt"
        "time"
        "os"
        "strconv"
        "runtime"
)

//=======================================
// time context switch
//=======================================

var shake chan bool = make( chan bool )

func ContextSwitch(N int) {
        start := time.Now()
        for i := 1; i <= N; i += 1 {
                runtime.Gosched()
        }
        end := time.Now()
        fmt.Printf("%d\n", end.Sub(start) / time.Duration(N))
        shake <- true   // indicate completion
}

//=======================================
// benchmark driver
//=======================================

func main() {
        var times int = 10000000
        if len( os.Args ) > 2 { os.Exit( 1 ) }
        if len( os.Args ) == 2 { times, _ = strconv.Atoi(os.Args[1]) }
        go ContextSwitch( times )               // context switch
        <- shake
}

// Local Variables: //
// tab-width: 4 //
// End: //