UDP: Windows implementation using non-blocking IO

net/udp/udp_socket_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/udp/udp_socket.h"
 
 #include "net/udp/udp_client_socket.h"
 #include "net/udp/udp_server_socket.h"
 
 #include "base/basictypes.h"
 #include "base/bind.h"
+#include "base/memory/weak_ptr.h"
 #include "base/metrics/histogram.h"
+#include "base/run_loop.h"
 #include "base/stl_util.h"
 #include "net/base/io_buffer.h"
 #include "net/base/ip_endpoint.h"
 #include "net/base/net_errors.h"
 #include "net/base/net_log_unittest.h"
 #include "net/base/net_util.h"
 #include "net/base/test_completion_callback.h"
 #include "net/test/net_test_suite.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 
 namespace net {
 
 namespace {
 
 class UDPSocketTest : public PlatformTest {
  public:
   UDPSocketTest()
-      : buffer_(new IOBufferWithSize(kMaxRead)) {
-  }
+      : buffer_(new IOBufferWithSize(kMaxRead)), weak_factory_(this) {}
 
   // Blocks until data is read from the socket.
   std::string RecvFromSocket(UDPServerSocket* socket) {
     TestCompletionCallback callback;
 
     int rv = socket->RecvFrom(
         buffer_.get(), kMaxRead, &recv_from_address_, callback.callback());
     if (rv == ERR_IO_PENDING)
       rv = callback.WaitForResult();
     if (rv < 0)
       return std::string();  // error!
     return std::string(buffer_->data(), rv);
   }
 
+  void DoneWritePacketsToSocket(UDPClientSocket* socket,
+                                int num_of_packets,
+                                base::Closure done_callback,
+                                int error) {
+    WritePacketsToSocket(socket, num_of_packets, done_callback);
+  }
+
+  // Send |num_of_packets| to |socket|. Invoke |done_callback| when done.
+  void WritePacketsToSocket(UDPClientSocket* socket,
+                            int num_of_packets,
+                            base::Closure done_callback) {
+    std::string msg(kMaxRead, 'G');
+    scoped_refptr<StringIOBuffer> io_buffer(new StringIOBuffer(msg));
+
+    while (num_of_packets) {
+      int rv =
+          socket->Write(io_buffer.get(), io_buffer->size(),
+                        base::Bind(&UDPSocketTest::DoneWritePacketsToSocket,
+                                   weak_factory_.GetWeakPtr(), socket,
+                                   num_of_packets - 1, done_callback));
+      if (rv == ERR_IO_PENDING)
+        break;
+      --num_of_packets;
+    }
+    if (!num_of_packets) {
+      done_callback.Run();
+      return;
+    }
+  }
+
   // Loop until |msg| has been written to the socket or until an
   // error occurs.
   // If |address| is specified, then it is used for the destination
   // to send to. Otherwise, will send to the last socket this server
   // received from.
   int SendToSocket(UDPServerSocket* socket, std::string msg) {
     return SendToSocket(socket, msg, recv_from_address_);
   }
 
   int SendToSocket(UDPServerSocket* socket,
@@ skipping 52 matching lines @@
       bytes_sent += rv;
       buffer->DidConsume(rv);
     }
     return bytes_sent;
   }
 
  protected:
   static const int kMaxRead = 1024;
   scoped_refptr<IOBufferWithSize> buffer_;
   IPEndPoint recv_from_address_;
+  base::WeakPtrFactory<UDPSocketTest> weak_factory_;
 };
 
 // Creates and address from an ip/port and returns it in |address|.
 void CreateUDPAddress(std::string ip_str, uint16 port, IPEndPoint* address) {
   IPAddressNumber ip_number;
   bool rv = ParseIPLiteralToNumber(ip_str, &ip_number);
   if (!rv)
     return;
   *address = IPEndPoint(ip_number, port);
 }
@@ skipping 486 matching lines @@
 
   client.SetDiffServCodePoint(DSCP_NO_CHANGE);
   client.SetDiffServCodePoint(DSCP_AF41);
   client.SetDiffServCodePoint(DSCP_DEFAULT);
   client.SetDiffServCodePoint(DSCP_CS2);
   client.SetDiffServCodePoint(DSCP_NO_CHANGE);
   client.SetDiffServCodePoint(DSCP_DEFAULT);
   client.Close();
 }
 
+TEST_F(UDPSocketTest, DISABLED_WriteBenchmark) {

[rvargas (doing something else), 2015/01/21 22:10:09]

benchmarks belong to net_perftests

[Alpha Left Google, 2015/01/22 01:01:25]

Doing this in a later patchset.

+  const uint16 kPort = 9999;
+  std::string simple_message("hello world!");
+
+  // Setup the server to listen.
+  IPEndPoint bind_address;
+  CreateUDPAddress("127.0.0.1", kPort, &bind_address);
+  CapturingNetLog server_log;
+  scoped_ptr<UDPServerSocket> server(
+      new UDPServerSocket(&server_log, NetLog::Source()));
+  server->AllowAddressReuse();
+  int rv = server->Listen(bind_address);
+  ASSERT_EQ(OK, rv);
+
+  // Setup the client.
+  IPEndPoint server_address;
+  CreateUDPAddress("127.0.0.1", kPort, &server_address);
+  CapturingNetLog client_log;
+  scoped_ptr<UDPClientSocket> client(
+      new UDPClientSocket(DatagramSocket::DEFAULT_BIND, RandIntCallback(),
+                          &client_log, NetLog::Source()));
+  rv = client->Connect(server_address);
+  EXPECT_EQ(OK, rv);
+
+  base::RunLoop run_loop;
+  base::TimeTicks start_ticks = base::TimeTicks::Now();
+  int packets = 100000;
+  client->SetSendBufferSize(1024 * 128);
+  WritePacketsToSocket(client.get(), packets, run_loop.QuitClosure());
+  run_loop.Run();
+
+  double elapsed = (base::TimeTicks::Now() - start_ticks).InSecondsF();
+  LOG(INFO) << "Write speed: " << packets / 1024 / elapsed << " MB/s";
+  server.reset();
+  client.reset();
+}
+
 }  // namespace
 
 #if defined(OS_WIN)
 
 namespace {
 
 const HANDLE kFakeHandle = (HANDLE)19;
 const QOS_FLOWID kFakeFlowId = (QOS_FLOWID)27;
 
 BOOL WINAPI FakeQOSCreateHandleFAIL(PQOS_VERSION version, PHANDLE handle) {
@@ skipping 108 matching lines @@
   g_expected_traffic_type = QOSTrafficTypeExcellentEffort;
   EXPECT_EQ(OK, client.SetDiffServCodePoint(DSCP_NO_CHANGE));
   g_expected_dscp = DSCP_DEFAULT;
   g_expected_traffic_type = QOSTrafficTypeBestEffort;
   EXPECT_EQ(OK, client.SetDiffServCodePoint(DSCP_DEFAULT));
   client.Close();
 }
 #endif
 
 }  // namespace net