From 981cdb79fdbf75ff755c80297d6d0e893d076555 Mon Sep 17 00:00:00 2001
From: "Steinar H. Gunderson" <sgunderson@bigfoot.com>
Date: Mon, 22 Apr 2013 23:24:59 +0200
Subject: [PATCH] Enable TCP_CORK if available.

---
 acceptor.cpp | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/acceptor.cpp b/acceptor.cpp
index 2abfa52..32a89fa 100644
--- a/acceptor.cpp
+++ b/acceptor.cpp
@@ -1,11 +1,13 @@
 #include <assert.h>
 #include <errno.h>
 #include <netinet/in.h>
+#include <netinet/tcp.h>
 #include <poll.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/ioctl.h>
 #include <sys/socket.h>
+#include <sys/types.h>
 #include <unistd.h>
 
 #include "acceptor.h"
@@ -120,10 +122,18 @@ void Acceptor::do_work()
 		// Set the socket as nonblocking.
 		int one = 1;
 		if (ioctl(sock, FIONBIO, &one) == -1) {
-			log_perror("FIONBIO");
+			log_perror("ioctl(FIONBIO)");
 			exit(1);
 		}
 
+		// Enable TCP_CORK for maximum throughput. In the rare case that the
+		// stream stops entirely, this will cause a small delay (~200 ms)
+		// before the last part is sent out, but that should be fine.
+		if (setsockopt(sock, SOL_TCP, TCP_CORK, &one, sizeof(one)) == -1) {
+			log_perror("setsockopt(TCP_CORK)");
+			// Can still continue.
+		}
+
 		// Pick a server, round-robin, and hand over the socket to it.
 		servers->add_client(sock);
 	}
-- 
2.39.2