opengles qemu-pipe perforance on windows

Set the socket send buffer size to 128k on windows
to allow higher throuput when sending large blocks
over the pipe. On Linux the default value is already
128k. Might want to enable this for all 'tcp" pipes,
currently it is only for the opengles pipe.

Change-Id: I0c6868b6af54b4df1a0257bfe591baab6f76e14a

1 files changed, 20 insertions, 2 deletions

diff --git a/android/hw-pipe-net.c b/android/hw-pipe-net.c
index 951b4d3..dade446 100644
--- a/android/hw-pipe-net.c
+++ b/android/hw-pipe-net.c
@@ -68,7 +68,7 @@ typedef struct {
     int             wakeWanted;
     LoopIo          io[1];
     AsyncConnector  connector[1];
-
+    int             shouldSetSocketOpt;
 } NetPipe;
 
 static void
@@ -192,6 +192,7 @@ netPipe_initFromAddress( void* hwpipe, const SockAddress*  address, Looper* loop
 
     pipe->hwpipe = hwpipe;
     pipe->state  = STATE_INIT;
+    pipe->shouldSetSocketOpt = 0;
 
     {
         AsyncStatus  status;
@@ -245,6 +246,19 @@ netPipe_sendBuffers( void* opaque, const GoldfishPipeBuffer* buffers, int numBuf
     const GoldfishPipeBuffer* buff = buffers;
     const GoldfishPipeBuffer* buffEnd = buff + numBuffers;
 
+#ifdef _WIN32
+    if (pipe->shouldSetSocketOpt == 1) {
+        int sndbuf = 128 * 1024;
+        int len = sizeof(sndbuf);
+        if (setsockopt(pipe->io->fd, SOL_SOCKET, SO_SNDBUF,
+                       (char*)&sndbuf, len) == SOCKET_ERROR) {
+            D("Failed to set SO_SNDBUF to %d error=0x%x\n",
+               sndbuf, WSAGetLastError());
+        }
+        pipe->shouldSetSocketOpt = 0;
+    }
+#endif
+
     for (; buff < buffEnd; buff++)
         count += buff->size;
 
@@ -461,10 +475,14 @@ static void*
 openglesPipe_init( void* hwpipe, void* _looper, const char* args )
 {
     char temp[32];
+    NetPipe *pipe;
 
     /* For now, simply connect through tcp */
     snprintf(temp, sizeof temp, "%d", DEFAULT_OPENGLES_PORT);
-    return netPipe_initTcp(hwpipe, _looper, temp);
+    pipe = (NetPipe *)netPipe_initTcp(hwpipe, _looper, temp);
+    pipe->shouldSetSocketOpt = 1;
+
+    return pipe;
 }
 
 static const GoldfishPipeFuncs  openglesPipe_funcs = {