Enable TCP_CORK if available.
authorSteinar H. Gunderson <sgunderson@bigfoot.com>
Mon, 22 Apr 2013 21:24:59 +0000 (23:24 +0200)
committerSteinar H. Gunderson <sgunderson@bigfoot.com>
Mon, 22 Apr 2013 21:24:59 +0000 (23:24 +0200)
acceptor.cpp

index 2abfa52..32a89fa 100644 (file)
@@ -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);
        }