add missing backoffs

examples/berkeley-listener/berkeley_server.go

@@ -347,6 +347,7 @@ func mockClient(stack *xnet.StackAsync, port uint16, subnet netip.Prefix) {
 		TxBuf:             make([]byte, 2048),
 		TxPacketQueueSize: 4,
 		Logger:            slog.Default(),
+		RWBackoff:         tcpBackoff,
 	})
 	if err != nil {
 		panic(err.Error())

x/xnet/stack-go.go

@@ -99,6 +99,7 @@ func (s StackGo) SocketNetip(ctx context.Context, network string, family, sotype
 				RxBuf:       make([]byte, s.plcfg.RxBufSize),
 				TxQueueSize: s.plcfg.QueueSize,
 				RxQueueSize: s.plcfg.QueueSize,
+				RWBackoff:   s.plcfg.NewBackoff(),
 			})
 			if err != nil {
 				return nil, err
@@ -120,6 +121,7 @@ func (s StackGo) SocketNetip(ctx context.Context, network string, family, sotype
 			RxBuf:       make([]byte, s.plcfg.RxBufSize),
 			TxQueueSize: s.plcfg.QueueSize,
 			RxQueueSize: s.plcfg.QueueSize,
+			RWBackoff:   s.plcfg.NewBackoff(),
 		})
 		if err != nil {
 			return nil, err

x/xnet/xnet_bench_test.go

@@ -112,6 +112,7 @@ func BenchmarkTCPHandshake(b *testing.B) {
 		RxBuf:             buf[:MTU],
 		TxBuf:             buf[MTU : MTU*2],
 		TxPacketQueueSize: 4,
+		RWBackoff:         backoffYield,
 	})
 	if err != nil {
 		b.Fatal(err)
@@ -120,6 +121,7 @@ func BenchmarkTCPHandshake(b *testing.B) {
 		RxBuf:             buf[2*MTU : 3*MTU],
 		TxBuf:             buf[3*MTU : 4*MTU],
 		TxPacketQueueSize: 4,
+		RWBackoff:         backoffYield,
 	})
 	if err != nil {
 		b.Fatal(err)