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Diffstat (limited to 'src/pkg/net/tcp_test.go')
-rw-r--r--src/pkg/net/tcp_test.go310
1 files changed, 302 insertions, 8 deletions
diff --git a/src/pkg/net/tcp_test.go b/src/pkg/net/tcp_test.go
index a71b02b47..62fd99f5c 100644
--- a/src/pkg/net/tcp_test.go
+++ b/src/pkg/net/tcp_test.go
@@ -6,8 +6,10 @@ package net
import (
"fmt"
+ "io"
"reflect"
"runtime"
+ "sync"
"testing"
"time"
)
@@ -59,7 +61,7 @@ func BenchmarkTCP6PersistentTimeout(b *testing.B) {
func benchmarkTCP(b *testing.B, persistent, timeout bool, laddr string) {
const msgLen = 512
conns := b.N
- numConcurrent := runtime.GOMAXPROCS(-1) * 16
+ numConcurrent := runtime.GOMAXPROCS(-1) * 2
msgs := 1
if persistent {
conns = numConcurrent
@@ -147,11 +149,134 @@ func benchmarkTCP(b *testing.B, persistent, timeout bool, laddr string) {
}
}
+func BenchmarkTCP4ConcurrentReadWrite(b *testing.B) {
+ benchmarkTCPConcurrentReadWrite(b, "127.0.0.1:0")
+}
+
+func BenchmarkTCP6ConcurrentReadWrite(b *testing.B) {
+ if !supportsIPv6 {
+ b.Skip("ipv6 is not supported")
+ }
+ benchmarkTCPConcurrentReadWrite(b, "[::1]:0")
+}
+
+func benchmarkTCPConcurrentReadWrite(b *testing.B, laddr string) {
+ // The benchmark creates GOMAXPROCS client/server pairs.
+ // Each pair creates 4 goroutines: client reader/writer and server reader/writer.
+ // The benchmark stresses concurrent reading and writing to the same connection.
+ // Such pattern is used in net/http and net/rpc.
+
+ b.StopTimer()
+
+ P := runtime.GOMAXPROCS(0)
+ N := b.N / P
+ W := 1000
+
+ // Setup P client/server connections.
+ clients := make([]Conn, P)
+ servers := make([]Conn, P)
+ ln, err := Listen("tcp", laddr)
+ if err != nil {
+ b.Fatalf("Listen failed: %v", err)
+ }
+ defer ln.Close()
+ done := make(chan bool)
+ go func() {
+ for p := 0; p < P; p++ {
+ s, err := ln.Accept()
+ if err != nil {
+ b.Fatalf("Accept failed: %v", err)
+ }
+ servers[p] = s
+ }
+ done <- true
+ }()
+ for p := 0; p < P; p++ {
+ c, err := Dial("tcp", ln.Addr().String())
+ if err != nil {
+ b.Fatalf("Dial failed: %v", err)
+ }
+ clients[p] = c
+ }
+ <-done
+
+ b.StartTimer()
+
+ var wg sync.WaitGroup
+ wg.Add(4 * P)
+ for p := 0; p < P; p++ {
+ // Client writer.
+ go func(c Conn) {
+ defer wg.Done()
+ var buf [1]byte
+ for i := 0; i < N; i++ {
+ v := byte(i)
+ for w := 0; w < W; w++ {
+ v *= v
+ }
+ buf[0] = v
+ _, err := c.Write(buf[:])
+ if err != nil {
+ b.Fatalf("Write failed: %v", err)
+ }
+ }
+ }(clients[p])
+
+ // Pipe between server reader and server writer.
+ pipe := make(chan byte, 128)
+
+ // Server reader.
+ go func(s Conn) {
+ defer wg.Done()
+ var buf [1]byte
+ for i := 0; i < N; i++ {
+ _, err := s.Read(buf[:])
+ if err != nil {
+ b.Fatalf("Read failed: %v", err)
+ }
+ pipe <- buf[0]
+ }
+ }(servers[p])
+
+ // Server writer.
+ go func(s Conn) {
+ defer wg.Done()
+ var buf [1]byte
+ for i := 0; i < N; i++ {
+ v := <-pipe
+ for w := 0; w < W; w++ {
+ v *= v
+ }
+ buf[0] = v
+ _, err := s.Write(buf[:])
+ if err != nil {
+ b.Fatalf("Write failed: %v", err)
+ }
+ }
+ s.Close()
+ }(servers[p])
+
+ // Client reader.
+ go func(c Conn) {
+ defer wg.Done()
+ var buf [1]byte
+ for i := 0; i < N; i++ {
+ _, err := c.Read(buf[:])
+ if err != nil {
+ b.Fatalf("Read failed: %v", err)
+ }
+ }
+ c.Close()
+ }(clients[p])
+ }
+ wg.Wait()
+}
+
type resolveTCPAddrTest struct {
- net string
- litAddr string
- addr *TCPAddr
- err error
+ net string
+ litAddrOrName string
+ addr *TCPAddr
+ err error
}
var resolveTCPAddrTests = []resolveTCPAddrTest{
@@ -167,6 +292,8 @@ var resolveTCPAddrTests = []resolveTCPAddrTest{
{"", "127.0.0.1:0", &TCPAddr{IP: IPv4(127, 0, 0, 1), Port: 0}, nil}, // Go 1.0 behavior
{"", "[::1]:0", &TCPAddr{IP: ParseIP("::1"), Port: 0}, nil}, // Go 1.0 behavior
+ {"tcp", ":12345", &TCPAddr{Port: 12345}, nil},
+
{"http", "127.0.0.1:0", nil, UnknownNetworkError("http")},
}
@@ -178,16 +305,33 @@ func init() {
{"tcp6", "[fe80::1%" + index + "]:4", &TCPAddr{IP: ParseIP("fe80::1"), Port: 4, Zone: index}, nil},
}...)
}
+ if ips, err := LookupIP("localhost"); err == nil && len(ips) > 1 && supportsIPv4 && supportsIPv6 {
+ resolveTCPAddrTests = append(resolveTCPAddrTests, []resolveTCPAddrTest{
+ {"tcp", "localhost:5", &TCPAddr{IP: IPv4(127, 0, 0, 1), Port: 5}, nil},
+ {"tcp4", "localhost:6", &TCPAddr{IP: IPv4(127, 0, 0, 1), Port: 6}, nil},
+ {"tcp6", "localhost:7", &TCPAddr{IP: IPv6loopback, Port: 7}, nil},
+ }...)
+ }
}
func TestResolveTCPAddr(t *testing.T) {
for _, tt := range resolveTCPAddrTests {
- addr, err := ResolveTCPAddr(tt.net, tt.litAddr)
+ addr, err := ResolveTCPAddr(tt.net, tt.litAddrOrName)
if err != tt.err {
- t.Fatalf("ResolveTCPAddr(%v, %v) failed: %v", tt.net, tt.litAddr, err)
+ t.Fatalf("ResolveTCPAddr(%q, %q) failed: %v", tt.net, tt.litAddrOrName, err)
}
if !reflect.DeepEqual(addr, tt.addr) {
- t.Fatalf("got %#v; expected %#v", addr, tt.addr)
+ t.Fatalf("ResolveTCPAddr(%q, %q) = %#v, want %#v", tt.net, tt.litAddrOrName, addr, tt.addr)
+ }
+ if err == nil {
+ str := addr.String()
+ addr1, err := ResolveTCPAddr(tt.net, str)
+ if err != nil {
+ t.Fatalf("ResolveTCPAddr(%q, %q) [from %q]: %v", tt.net, str, tt.litAddrOrName, err)
+ }
+ if !reflect.DeepEqual(addr1, addr) {
+ t.Fatalf("ResolveTCPAddr(%q, %q) [from %q] = %#v, want %#v", tt.net, str, tt.litAddrOrName, addr1, addr)
+ }
}
}
}
@@ -294,3 +438,153 @@ func TestIPv6LinkLocalUnicastTCP(t *testing.T) {
<-done
}
}
+
+func TestTCPConcurrentAccept(t *testing.T) {
+ defer runtime.GOMAXPROCS(runtime.GOMAXPROCS(4))
+ ln, err := Listen("tcp", "127.0.0.1:0")
+ if err != nil {
+ t.Fatalf("Listen failed: %v", err)
+ }
+ const N = 10
+ var wg sync.WaitGroup
+ wg.Add(N)
+ for i := 0; i < N; i++ {
+ go func() {
+ for {
+ c, err := ln.Accept()
+ if err != nil {
+ break
+ }
+ c.Close()
+ }
+ wg.Done()
+ }()
+ }
+ for i := 0; i < 10*N; i++ {
+ c, err := Dial("tcp", ln.Addr().String())
+ if err != nil {
+ t.Fatalf("Dial failed: %v", err)
+ }
+ c.Close()
+ }
+ ln.Close()
+ wg.Wait()
+}
+
+func TestTCPReadWriteMallocs(t *testing.T) {
+ if testing.Short() {
+ t.Skip("skipping malloc count in short mode")
+ }
+ ln, err := Listen("tcp", "127.0.0.1:0")
+ if err != nil {
+ t.Fatalf("Listen failed: %v", err)
+ }
+ defer ln.Close()
+ var server Conn
+ errc := make(chan error)
+ go func() {
+ var err error
+ server, err = ln.Accept()
+ errc <- err
+ }()
+ client, err := Dial("tcp", ln.Addr().String())
+ if err != nil {
+ t.Fatalf("Dial failed: %v", err)
+ }
+ if err := <-errc; err != nil {
+ t.Fatalf("Accept failed: %v", err)
+ }
+ defer server.Close()
+ var buf [128]byte
+ mallocs := testing.AllocsPerRun(1000, func() {
+ _, err := server.Write(buf[:])
+ if err != nil {
+ t.Fatalf("Write failed: %v", err)
+ }
+ _, err = io.ReadFull(client, buf[:])
+ if err != nil {
+ t.Fatalf("Read failed: %v", err)
+ }
+ })
+ if mallocs > 0 {
+ t.Fatalf("Got %v allocs, want 0", mallocs)
+ }
+}
+
+func TestTCPStress(t *testing.T) {
+ const conns = 2
+ const msgLen = 512
+ msgs := int(1e4)
+ if testing.Short() {
+ msgs = 1e2
+ }
+
+ sendMsg := func(c Conn, buf []byte) bool {
+ n, err := c.Write(buf)
+ if n != len(buf) || err != nil {
+ t.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 {
+ t.Logf("Read failed: %v", err)
+ return false
+ }
+ }
+ return true
+ }
+
+ ln, err := Listen("tcp", "127.0.0.1:0")
+ if err != nil {
+ t.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()
+ var buf [msgLen]byte
+ for m := 0; m < msgs; m++ {
+ if !recvMsg(c, buf[:]) || !sendMsg(c, buf[:]) {
+ break
+ }
+ }
+ }(c)
+ }
+ }()
+ done := make(chan bool)
+ for i := 0; i < conns; i++ {
+ // Client connection.
+ go func() {
+ defer func() {
+ done <- true
+ }()
+ c, err := Dial("tcp", ln.Addr().String())
+ if err != nil {
+ t.Logf("Dial failed: %v", err)
+ return
+ }
+ defer c.Close()
+ var buf [msgLen]byte
+ for m := 0; m < msgs; m++ {
+ if !sendMsg(c, buf[:]) || !recvMsg(c, buf[:]) {
+ break
+ }
+ }
+ }()
+ }
+ for i := 0; i < conns; i++ {
+ <-done
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-08 04:22:01 +0000