From b79bb082abca3703d8dbcfebfc1049d04b1ba1f7 Mon Sep 17 00:00:00 2001
From: nnbcccscdscdsc <2709767634@qq.com>
Date: Tue, 24 Mar 2026 13:35:40 +0800
Subject: [PATCH] =?UTF-8?q?fix:=E8=AE=BE=E7=BD=AE=E7=BC=93=E5=86=B2?=
 =?UTF-8?q?=E5=8C=BAbuffer=EF=BC=8C=E8=AE=BE=E7=BD=AE=E8=B6=B3=E5=A4=9F?=
 =?UTF-8?q?=E5=A4=A7=E7=9A=84=20oob=20buffer=20=E6=9D=A5=E6=8E=A5=E6=94=B6?=
 =?UTF-8?q?=E6=8E=A7=E5=88=B6=E6=B6=88=E6=81=AF=EF=BC=8C=E8=B0=83=E7=94=A8?=
 =?UTF-8?q?=20recvmsg=20=E4=BB=8E=20errqueue=20=E8=AF=BB=E4=B8=80=E6=9D=A1?=
 =?UTF-8?q?=E6=B6=88=E6=81=AF?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 cmd/internal/transport/tcp_linux.go      | 21 ++++++++++++++++++++-
 cmd/internal/transport/tcp_linux_test.go |  2 +-
 2 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/cmd/internal/transport/tcp_linux.go b/cmd/internal/transport/tcp_linux.go
index e753791..6578bf1 100644
--- a/cmd/internal/transport/tcp_linux.go
+++ b/cmd/internal/transport/tcp_linux.go
@@ -15,7 +15,8 @@ import (
 )
 
 const (
-	linuxTimestampControlBufferSize = 256                    // 控制消息缓冲区。
+	linuxTimestampControlBufferSize = 2560                   // 控制消息缓冲区。
+	linuxSocketWriteBufferSize      = 10 * 1024 * 1024       // 请求把 socket 发送缓冲区调到 10 MiB。
 	linuxTXTimestampWaitTimeout     = 250 * time.Millisecond // 等待 TX 时间戳的上限。
 	linuxTXTimestampPollInterval    = time.Millisecond       // 轮询 errqueue 的间隔。
 	linuxDataPollInterval           = time.Millisecond       // 轮询普通收发的间隔。
@@ -88,6 +89,10 @@ func (c *TCPConn) initLinuxTimestamping() error {
 		return fmt.Errorf("transport: missing syscall conn")
 	}
 
+	if err := configureLinuxSocketWriteBuffer(rawConn); err != nil {
+		return fmt.Errorf("transport: configure socket write buffer: %w", err)
+	}
+
 	//socket是否可以成功打开 timestamping 取决于内核版本和配置，尝试多个 flag 组合直到成功或遇到非 EINVAL 错误。
 	if err := enableLinuxTimestamping(rawConn); err != nil {
 		return fmt.Errorf("transport: enable linux timestamping: %w", err)
@@ -97,6 +102,20 @@ func (c *TCPConn) initLinuxTimestamping() error {
 	return nil
 }
 
+// 设置 TCP缓冲区buffer size
+func configureLinuxSocketWriteBuffer(rawConn syscall.RawConn) error {
+	var lastErr error
+
+	err := rawConn.Control(func(fd uintptr) {
+		lastErr = syscall.SetsockoptInt(int(fd), syscall.SOL_SOCKET, syscall.SO_SNDBUF, linuxSocketWriteBufferSize)
+	})
+	if err != nil {
+		return err
+	}
+
+	return lastErr
+}
+
 // 给 socket开权限打开TX software timestamping。
 func enableLinuxTimestamping(rawConn syscall.RawConn) error {
 	flagCandidates := []int{ //不同linux版本可能支持不同的 flag 组合，尝试多个组合直到成功。
diff --git a/cmd/internal/transport/tcp_linux_test.go b/cmd/internal/transport/tcp_linux_test.go
index ac1e46e..114f685 100644
--- a/cmd/internal/transport/tcp_linux_test.go
+++ b/cmd/internal/transport/tcp_linux_test.go
@@ -182,7 +182,7 @@ func TestSelectTXTimestampEventsFallsBackToHighestObservedID(t *testing.T) {
 
 func TestLinuxTimestampingDebugLoggerCapturesChunkAndErrqueueEvents(t *testing.T) {
 	clientConn, serverConn := newTCPPair(t)
-	setTCPWriteBuffer(t, clientConn, 4096)
+	setTCPWriteBuffer(t, clientConn, 10*1024*1024)
 
 	debugLogger := &recordingTXTimestampDebugLogger{}
 	senderLogger := &recordingLogger{}