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// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package net
import (
"runtime"
"testing"
"time"
)
func BenchmarkTCPOneShot(b *testing.B) {
benchmarkTCP(b, false, false)
}
func BenchmarkTCPOneShotTimeout(b *testing.B) {
benchmarkTCP(b, false, true)
}
func BenchmarkTCPPersistent(b *testing.B) {
benchmarkTCP(b, true, false)
}
func BenchmarkTCPPersistentTimeout(b *testing.B) {
benchmarkTCP(b, true, true)
}
func benchmarkTCP(b *testing.B, persistent, timeout bool) {
const msgLen = 512
conns := b.N
numConcurrent := runtime.GOMAXPROCS(-1) * 16
msgs := 1
if persistent {
conns = numConcurrent
msgs = b.N / conns
if msgs == 0 {
msgs = 1
}
if conns > b.N {
conns = b.N
}
}
sendMsg := func(c Conn, buf []byte) bool {
n, err := c.Write(buf)
if n != len(buf) || err != nil {
b.Logf("Write failed: %v", err)
return false
}
return true
}
recvMsg := func(c Conn, buf []byte) bool {
for read := 0; read != len(buf); {
n, err := c.Read(buf)
read += n
if err != nil {
b.Logf("Read failed: %v", err)
return false
}
}
return true
}
ln, err := Listen("tcp", "127.0.0.1:0")
if err != nil {
b.Fatalf("Listen failed: %v", err)
}
defer ln.Close()
// Acceptor.
go func() {
for {
c, err := ln.Accept()
if err != nil {
break
}
// Server connection.
go func(c Conn) {
defer c.Close()
if timeout {
c.SetDeadline(time.Now().Add(time.Hour)) // Not intended to fire.
}
var buf [msgLen]byte
for m := 0; m < msgs; m++ {
if !recvMsg(c, buf[:]) || !sendMsg(c, buf[:]) {
break
}
}
}(c)
}
}()
sem := make(chan bool, numConcurrent)
for i := 0; i < conns; i++ {
sem <- true
// Client connection.
go func() {
defer func() {
<-sem
}()
c, err := Dial("tcp", ln.Addr().String())
if err != nil {
b.Logf("Dial failed: %v", err)
return
}
defer c.Close()
if timeout {
c.SetDeadline(time.Now().Add(time.Hour)) // Not intended to fire.
}
var buf [msgLen]byte
for m := 0; m < msgs; m++ {
if !sendMsg(c, buf[:]) || !recvMsg(c, buf[:]) {
break
}
}
}()
}
for i := 0; i < cap(sem); i++ {
sem <- true
}
}
var tcpListenerNameTests = []struct {
net string
laddr *TCPAddr
}{
{"tcp4", &TCPAddr{IP: IPv4(127, 0, 0, 1)}},
{"tcp4", &TCPAddr{}},
{"tcp4", nil},
}
func TestTCPListenerName(t *testing.T) {
if testing.Short() || !*testExternal {
t.Logf("skipping test to avoid external network")
return
}
for _, tt := range tcpListenerNameTests {
ln, err := ListenTCP(tt.net, tt.laddr)
if err != nil {
t.Errorf("ListenTCP failed: %v", err)
return
}
defer ln.Close()
la := ln.Addr()
if a, ok := la.(*TCPAddr); !ok || a.Port == 0 {
t.Errorf("got %v; expected a proper address with non-zero port number", la)
return
}
}
}
|
