Update from https://crrev.com/315085

net/udp/udp_socket_perftest.cc

Index: net/udp/udp_socket_perftest.cc
diff --git a/net/udp/udp_socket_perftest.cc b/net/udp/udp_socket_perftest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..86f072988f9660769aa8d787ce85181a5428120c
--- /dev/null
+++ b/net/udp/udp_socket_perftest.cc
@@ -0,0 +1,141 @@
+// Copyright 2015 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 "base/basictypes.h"
+#include "base/bind.h"
+#include "base/memory/weak_ptr.h"
+#include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
+#include "base/test/perf_time_logger.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 "net/udp/udp_client_socket.h"
+#include "net/udp/udp_server_socket.h"
+#include "net/udp/udp_socket.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/platform_test.h"
+
+namespace {
+
+class UDPSocketPerfTest : public PlatformTest {
+ public:
+  UDPSocketPerfTest()
+      : buffer_(new net::IOBufferWithSize(kPacketSize)), weak_factory_(this) {}
+
+  void DoneWritePacketsToSocket(net::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(net::UDPClientSocket* socket,
+                            int num_of_packets,
+                            base::Closure done_callback);
+
+  // Use non-blocking IO if |use_nonblocking_io| is true. This variable only
+  // has effect on Windows.
+  void WriteBenchmark(bool use_nonblocking_io);
+
+ protected:
+  static const int kPacketSize = 1024;
+  scoped_refptr<net::IOBufferWithSize> buffer_;
+  base::WeakPtrFactory<UDPSocketPerfTest> weak_factory_;
+};
+
+// Creates and address from an ip/port and returns it in |address|.
+void CreateUDPAddress(std::string ip_str,
+                      uint16 port,
+                      net::IPEndPoint* address) {
+  net::IPAddressNumber ip_number;
+  bool rv = net::ParseIPLiteralToNumber(ip_str, &ip_number);
+  if (!rv)
+    return;
+  *address = net::IPEndPoint(ip_number, port);
+}
+
+void UDPSocketPerfTest::WritePacketsToSocket(net::UDPClientSocket* socket,
+                                             int num_of_packets,
+                                             base::Closure done_callback) {
+  scoped_refptr<net::IOBufferWithSize> io_buffer(
+      new net::IOBufferWithSize(kPacketSize));
+  memset(io_buffer->data(), 'G', kPacketSize);
+
+  while (num_of_packets) {
+    int rv =
+        socket->Write(io_buffer.get(), io_buffer->size(),
+                      base::Bind(&UDPSocketPerfTest::DoneWritePacketsToSocket,
+                                 weak_factory_.GetWeakPtr(), socket,
+                                 num_of_packets - 1, done_callback));
+    if (rv == net::ERR_IO_PENDING)
+      break;
+    --num_of_packets;
+  }
+  if (!num_of_packets) {
+    done_callback.Run();
+    return;
+  }
+}
+
+void UDPSocketPerfTest::WriteBenchmark(bool use_nonblocking_io) {
+  base::MessageLoopForIO message_loop;
+  const uint16 kPort = 9999;
+
+  // Setup the server to listen.
+  net::IPEndPoint bind_address;
+  CreateUDPAddress("127.0.0.1", kPort, &bind_address);
+  net::CapturingNetLog server_log;
+  scoped_ptr<net::UDPServerSocket> server(
+      new net::UDPServerSocket(&server_log, net::NetLog::Source()));
+#if defined(OS_WIN)
+  if (use_nonblocking_io)
+    server->UseNonBlockingIO();
+#endif
+  int rv = server->Listen(bind_address);
+  ASSERT_EQ(net::OK, rv);
+
+  // Setup the client.
+  net::IPEndPoint server_address;
+  CreateUDPAddress("127.0.0.1", kPort, &server_address);
+  net::CapturingNetLog client_log;
+  scoped_ptr<net::UDPClientSocket> client(new net::UDPClientSocket(
+      net::DatagramSocket::DEFAULT_BIND, net::RandIntCallback(), &client_log,
+      net::NetLog::Source()));
+#if defined(OS_WIN)
+  if (use_nonblocking_io)
+    client->UseNonBlockingIO();
+#endif
+  rv = client->Connect(server_address);
+  EXPECT_EQ(net::OK, rv);
+
+  base::RunLoop run_loop;
+  base::TimeTicks start_ticks = base::TimeTicks::Now();
+  int packets = 100000;
+  client->SetSendBufferSize(1024);
+  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";
+}
+
+TEST_F(UDPSocketPerfTest, Write) {
+  base::PerfTimeLogger timer("UDP_socket_write");
+  WriteBenchmark(false);
+}
+
+#if defined(OS_WIN)
+TEST_F(UDPSocketPerfTest, WriteNonBlocking) {
+  base::PerfTimeLogger timer("UDP_socket_write_nonblocking");
+  WriteBenchmark(true);
+}
+#endif
+
+}  // namespace