diff --git a/gold/link/listen.go b/gold/link/listen.go
index 412ab30..53a13e2 100644
--- a/gold/link/listen.go
+++ b/gold/link/listen.go
@@ -5,7 +5,6 @@ import (
 	"net"
 	"runtime"
 	"strconv"
-	"sync"
 	"sync/atomic"
 	"time"
 	"unsafe"
@@ -31,40 +30,10 @@ func (m *Me) listen() (conn p2p.Conn, err error) {
 	m.ep = conn.LocalAddr()
 	logrus.Infoln("[listen] at", m.ep)
 	go func() {
-		n := uint(runtime.NumCPU())
-		if n > 64 {
-			n = 64 // 只用最多 64 核
-		}
-		logrus.Infoln("[listen] use cpu num:", n)
-		listenbuf := make([]byte, lstnbufgragsz*n)
-		hasntfinished := make([]sync.Mutex, n)
 		for {
-			usenewbuf := false
-			i := uint(0)
-			for !hasntfinished[i].TryLock() {
-				i++
-				i %= n
-				if i == 0 { // looked up a full round, make a new buf
-					usenewbuf = true
-					if config.ShowDebugLog {
-						logrus.Debugln("[listen] use new buf")
-					}
-					break
-				}
-			}
-			if config.ShowDebugLog && !usenewbuf {
-				logrus.Debugln("[listen] lock index", i)
-			}
-			var lbf pbuf.Bytes
-			if usenewbuf {
-				lbf = pbuf.NewBytes(lstnbufgragsz)
-			} else {
-				if config.ShowDebugLog {
-					logrus.Debugln("[listen] take index", i, "slice", i*lstnbufgragsz, (i+1)*lstnbufgragsz, "cap", lstnbufgragsz)
-				}
-				lbf = pbuf.ParseBytes(listenbuf[i*lstnbufgragsz : (i+1)*lstnbufgragsz : (i+1)*lstnbufgragsz]...)
-			}
+			lbf := pbuf.NewBytes(lstnbufgragsz)
 			n, addr, err := conn.ReadFromPeer(lbf.Bytes())
+			lbf.KeepAlive()
 			if m.connections == nil || errors.Is(err, net.ErrClosed) {
 				logrus.Warnln("[listen] quit listening")
 				return
@@ -76,13 +45,6 @@ func (m *Me) listen() (conn p2p.Conn, err error) {
 					logrus.Errorln("[listen] reconnect udp err:", err)
 					return
 				}
-				if !usenewbuf {
-					if config.ShowDebugLog {
-						logrus.Debugln("[listen] unlock index", i)
-					}
-					hasntfinished[i].Unlock()
-					i--
-				}
 				continue
 			}
 			if n <= 0 {
@@ -91,17 +53,13 @@ func (m *Me) listen() (conn p2p.Conn, err error) {
 				}
 				continue
 			}
-			index := -1
-			if !usenewbuf {
-				index = int(i)
-			}
-			go m.waitordispatch(index, addr, lbf.Trans().SliceTo(n), hasntfinished)
+			go m.waitordispatch(addr, lbf, n)
 		}
 	}()
 	return
 }
 
-func (m *Me) waitordispatch(index int, addr p2p.EndPoint, buf pbuf.Bytes, hasntfinished []sync.Mutex) {
+func (m *Me) waitordispatch(addr p2p.EndPoint, buf pbuf.Bytes, n int) {
 	recvtotlcnt := atomic.AddUint64(&m.recvtotlcnt, uint64(buf.Len()))
 	recvloopcnt := atomic.AddUintptr(&m.recvloopcnt, 1)
 	recvlooptime := atomic.LoadInt64(&m.recvlooptime)
@@ -111,56 +69,41 @@ func (m *Me) waitordispatch(index int, addr p2p.EndPoint, buf pbuf.Bytes, hasntf
 		atomic.StoreUint64(&m.recvtotlcnt, 0)
 		atomic.StoreInt64(&m.recvlooptime, now)
 	}
-	packet := m.wait(buf.Trans().Bytes())
+	packet := m.wait(buf.SliceTo(n).Bytes())
+	buf.KeepAlive()
 	if packet == nil {
-		if index < 0 {
-			if config.ShowDebugLog {
-				logrus.Debugln("[listen] queue waiting")
-			}
-			return
-		}
 		if config.ShowDebugLog {
-			logrus.Debugln("[listen] queue waiting, unlock index", index)
+			logrus.Debugln("[listen] queue waiting")
 		}
-		hasntfinished[index].Unlock()
 		return
 	}
 	if config.ShowDebugLog {
-		logrus.Debugln("[listen] index", index, "dispatch", len(packet.Pointer().UnsafeBody()), "bytes packet")
+		logrus.Debugln("[listen] dispatch", len(packet.Pointer().UnsafeBody()), "bytes packet")
 	}
-	if index >= 0 {
-		defer hasntfinished[index].Unlock()
-		m.dispatch(packet, addr, index)
-		return
-	}
-	m.dispatch(packet, addr, index)
+	m.dispatch(packet, addr)
 }
 
-func (m *Me) dispatch(packet *orbyte.Item[head.Packet], addr p2p.EndPoint, index int) {
-	if config.ShowDebugLog {
-		defer logrus.Debugln("[listen] dispatched, unlock index", index)
-		logrus.Debugln("[listen] start dispatching index", index)
-	}
+func (m *Me) dispatch(packet *orbyte.Item[head.Packet], addr p2p.EndPoint) {
 	pp := packet.Pointer
 	r := pp().Len() - pp().BodyLen()
 	if r > 0 {
-		logrus.Warnln("[listen] @", index, "packet from endpoint", addr, "len", pp().BodyLen(), "is smaller than it declared len", pp().Len(), ", drop it")
+		logrus.Warnln("[listen] packet from endpoint", addr, "len", pp().BodyLen(), "is smaller than it declared len", pp().Len(), ", drop it")
 		return
 	}
 	p, ok := m.IsInPeer(pp().Src.String())
 	if config.ShowDebugLog {
-		logrus.Debugln("[listen] @", index, "recv from endpoint", addr, "src", pp().Src, "dst", pp().Dst)
+		logrus.Debugln("[listen] recv from endpoint", addr, "src", pp().Src, "dst", pp().Dst)
 	}
 	if !ok {
-		logrus.Warnln("[listen] @", index, "packet from", pp().Src, "to", pp().Dst, "is refused")
+		logrus.Warnln("[listen] packet from", pp().Src, "to", pp().Dst, "is refused")
 		return
 	}
 	if helper.IsNilInterface(p.endpoint) || !p.endpoint.Euqal(addr) {
 		if m.ep.Network() == "tcp" && !addr.Euqal(p.endpoint) {
-			logrus.Infoln("[listen] @", index, "set endpoint of peer", p.peerip, "to", addr.String())
+			logrus.Infoln("[listen] set endpoint of peer", p.peerip, "to", addr.String())
 			p.endpoint = addr
 		} else { // others are all no status link
-			logrus.Infoln("[listen] @", index, "set endpoint of peer", p.peerip, "to", addr.String())
+			logrus.Infoln("[listen] set endpoint of peer", p.peerip, "to", addr.String())
 			p.endpoint = addr
 		}
 	}
@@ -169,7 +112,7 @@ func (m *Me) dispatch(packet *orbyte.Item[head.Packet], addr p2p.EndPoint, index
 	switch {
 	case p.IsToMe(pp().Dst):
 		if !p.Accept(pp().Src) {
-			logrus.Warnln("[listen] @", index, "refused packet from", pp().Src.String()+":"+strconv.Itoa(int(pp().SrcPort)))
+			logrus.Warnln("[listen] refused packet from", pp().Src.String()+":"+strconv.Itoa(int(pp().SrcPort)))
 			return
 		}
 		addt := pp().AdditionalData()
@@ -177,7 +120,7 @@ func (m *Me) dispatch(packet *orbyte.Item[head.Packet], addr p2p.EndPoint, index
 		data, err := p.decode(pp().CipherIndex(), addt, pp().TransBody().Bytes())
 		if err != nil {
 			if config.ShowDebugLog {
-				logrus.Debugln("[listen] @", index, "drop invalid packet key idx:", pp().CipherIndex(), "addt:", addt, "err:", err)
+				logrus.Debugln("[listen] drop invalid packet key idx:", pp().CipherIndex(), "addt:", addt, "err:", err)
 			}
 			return
 		}
@@ -185,19 +128,19 @@ func (m *Me) dispatch(packet *orbyte.Item[head.Packet], addr p2p.EndPoint, index
 			dat, err := decodezstd(data.Trans().Bytes())
 			if err != nil {
 				if config.ShowDebugLog {
-					logrus.Debugln("[listen] @", index, "drop invalid zstd packet:", err)
+					logrus.Debugln("[listen] drop invalid zstd packet:", err)
 				}
 				return
 			}
 			if config.ShowDebugLog {
-				logrus.Debugln("[listen] @", index, "zstd decoded len:", dat.Len())
+				logrus.Debugln("[listen] zstd decoded len:", dat.Len())
 			}
 			data = dat
 		}
 		pp().SetBody(data)
 		if !pp().IsVaildHash() {
 			if config.ShowDebugLog {
-				logrus.Debugln("[listen] @", index, "drop invalid hash packet")
+				logrus.Debugln("[listen] drop invalid hash packet")
 			}
 			return
 		}
@@ -205,63 +148,63 @@ func (m *Me) dispatch(packet *orbyte.Item[head.Packet], addr p2p.EndPoint, index
 		case head.ProtoHello:
 			switch {
 			case len(pp().UnsafeBody()) == 0:
-				logrus.Warnln("[listen] @", index, "recv old hello packet, do nothing")
+				logrus.Warnln("[listen] recv old hello packet, do nothing")
 			case pp().UnsafeBody()[0] == byte(head.HelloPing):
 				n, err := p.WritePacket(head.NewPacketPartial(
 					head.ProtoHello, m.SrcPort(), p.peerip, m.DstPort(), pbuf.ParseBytes(byte(head.HelloPong))), false)
 				if err == nil {
-					logrus.Infoln("[listen] @", index, "recv hello, send", n, "bytes hello ack packet")
+					logrus.Infoln("[listen] recv hello, send", n, "bytes hello ack packet")
 				} else {
-					logrus.Errorln("[listen] @", index, "send hello ack packet error:", err)
+					logrus.Errorln("[listen] send hello ack packet error:", err)
 				}
 			default:
-				logrus.Infoln("[listen] @", index, "recv hello ack packet, do nothing")
+				logrus.Infoln("[listen] recv hello ack packet, do nothing")
 			}
 		case head.ProtoNotify:
-			logrus.Infoln("[listen] @", index, "recv notify from", pp().Src)
+			logrus.Infoln("[listen] recv notify from", pp().Src)
 			p.onNotify(pp().UnsafeBody())
 			runtime.KeepAlive(packet)
 		case head.ProtoQuery:
-			logrus.Infoln("[listen] @", index, "recv query from", pp().Src)
+			logrus.Infoln("[listen] recv query from", pp().Src)
 			p.onQuery(pp().UnsafeBody())
 			runtime.KeepAlive(packet)
 		case head.ProtoData:
 			if p.pipe != nil {
 				p.pipe <- packet.Copy()
 				if config.ShowDebugLog {
-					logrus.Debugln("[listen] @", index, "deliver to pipe of", p.peerip)
+					logrus.Debugln("[listen] deliver to pipe of", p.peerip)
 				}
 			} else {
 				_, err := m.nic.Write(pp().UnsafeBody())
 				if err != nil {
-					logrus.Errorln("[listen] @", index, "deliver", pp().BodyLen(), "bytes data to nic err:", err)
+					logrus.Errorln("[listen] deliver", pp().BodyLen(), "bytes data to nic err:", err)
 				} else if config.ShowDebugLog {
-					logrus.Debugln("[listen] @", index, "deliver", pp().BodyLen(), "bytes data to nic")
+					logrus.Debugln("[listen] deliver", pp().BodyLen(), "bytes data to nic")
 				}
 			}
 		default:
-			logrus.Warnln("[listen] @", index, "recv unknown proto:", pp().Proto)
+			logrus.Warnln("[listen] recv unknown proto:", pp().Proto)
 		}
 	case p.Accept(pp().Dst):
 		if !p.allowtrans {
-			logrus.Warnln("[listen] @", index, "refused to trans packet to", pp().Dst.String()+":"+strconv.Itoa(int(pp().DstPort)))
+			logrus.Warnln("[listen] refused to trans packet to", pp().Dst.String()+":"+strconv.Itoa(int(pp().DstPort)))
 			return
 		}
 		// 转发
 		lnk := m.router.NextHop(pp().Dst.String())
 		if lnk == nil {
-			logrus.Warnln("[listen] @", index, "transfer drop packet: nil nexthop")
+			logrus.Warnln("[listen] transfer drop packet: nil nexthop")
 			return
 		}
 		n, err := lnk.WritePacket(packet, true)
 		if err == nil {
 			if config.ShowDebugLog {
-				logrus.Debugln("[listen] @", index, "trans", n, "bytes packet to", pp().Dst.String()+":"+strconv.Itoa(int(pp().DstPort)))
+				logrus.Debugln("[listen] trans", n, "bytes packet to", pp().Dst.String()+":"+strconv.Itoa(int(pp().DstPort)))
 			}
 		} else {
-			logrus.Errorln("[listen] @", index, "trans packet to", pp().Dst.String()+":"+strconv.Itoa(int(pp().DstPort)), "err:", err)
+			logrus.Errorln("[listen] trans packet to", pp().Dst.String()+":"+strconv.Itoa(int(pp().DstPort)), "err:", err)
 		}
 	default:
-		logrus.Warnln("[listen] @", index, "packet dst", pp().Dst.String()+":"+strconv.Itoa(int(pp().DstPort)), "is not in peers")
+		logrus.Warnln("[listen] packet dst", pp().Dst.String()+":"+strconv.Itoa(int(pp().DstPort)), "is not in peers")
 	}
 }