Make ipc_tests file structure a little saner and add an ipc_perftests target.

ipc/ipc_perftests.cc

Index: ipc/ipc_perftests.cc
diff --git a/ipc/ipc_perftests.cc b/ipc/ipc_perftests.cc
new file mode 100644
index 0000000000000000000000000000000000000000..b290c1676fff1066052e37d81e3864246db6c2db
--- /dev/null
+++ b/ipc/ipc_perftests.cc
@@ -0,0 +1,205 @@
+// 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 "build/build_config.h"
+
+#if defined(OS_WIN)
+#include <windows.h>
+#elif defined(OS_POSIX)
+#include <sys/types.h>
+#include <unistd.h>
+#endif
+
+#include <stdio.h>
+#include <string>
+#include <utility>
+
+#include "ipc/ipc_test_base.h"
+
+#include "base/base_switches.h"
+#include "base/command_line.h"
+#include "base/debug/debug_on_start_win.h"
+#include "base/perftimer.h"
+#include "base/pickle.h"
+#include "base/test/perf_test_suite.h"
+#include "base/threading/thread.h"
+#include "base/time.h"
+#include "ipc/ipc_descriptors.h"
+#include "ipc/ipc_channel.h"
+#include "ipc/ipc_channel_proxy.h"
+#include "ipc/ipc_message_utils.h"
+#include "ipc/ipc_multiprocess_test.h"
+#include "ipc/ipc_sender.h"
+#include "ipc/ipc_switches.h"
+#include "testing/multiprocess_func_list.h"
+
+// This test times the roundtrip IPC message cycle. It is enabled with a
+// special preprocessor define to enable it instead of the standard IPC
+// unit tests. This works around some funny termination conditions in the
+// regular unit tests.
+//
+// This test is not automated. To test, you will want to vary the message
+// count and message size in TEST to get the numbers you want.
+//
+// FIXME(brettw): Automate this test and have it run by default.
+
+class IPCChannelPerfTest : public IPCTestBase {
+};
+
+// This channel listener just replies to all messages with the exact same
+// message. It assumes each message has one string parameter. When the string
+// "quit" is sent, it will exit.
+class ChannelReflectorListener : public IPC::Listener {
+ public:
+  explicit ChannelReflectorListener(IPC::Channel *channel) :
+    channel_(channel),
+    count_messages_(0) {
+    std::cout << "Reflector up" << std::endl;
+  }
+
+  ~ChannelReflectorListener() {
+    std::cout << "Client Messages: " << count_messages_ << std::endl;
+    std::cout << "Client Latency: " << latency_messages_.InMilliseconds()
+              << std::endl;
+  }
+
+  virtual bool OnMessageReceived(const IPC::Message& message) {
+    count_messages_++;
+    PickleIterator iter(message);
+    int64 time_internal;
+    EXPECT_TRUE(iter.ReadInt64(&time_internal));
+    int msgid;
+    EXPECT_TRUE(iter.ReadInt(&msgid));
+    std::string payload;
+    EXPECT_TRUE(iter.ReadString(&payload));
+    // TODO(vtl): Should we use |HighResNow()| instead of |Now()|?
+    latency_messages_ += base::TimeTicks::Now() -
+                         base::TimeTicks::FromInternalValue(time_internal);
+
+    // cout << "reflector msg received: " << msgid << endl;
+    if (payload == "quit")
+      MessageLoop::current()->Quit();
+
+    IPC::Message* msg = new IPC::Message(0,
+                                         2,
+                                         IPC::Message::PRIORITY_NORMAL);
+    msg->WriteInt64(base::TimeTicks::Now().ToInternalValue());
+    msg->WriteInt(msgid);
+    msg->WriteString(payload);
+    channel_->Send(msg);
+    return true;
+  }
+
+ private:
+  IPC::Channel *channel_;
+  int count_messages_;
+  base::TimeDelta latency_messages_;
+};
+
+class ChannelPerfListener : public IPC::Listener {
+ public:
+  ChannelPerfListener(IPC::Channel* channel, int msg_count, int msg_size) :
+       count_down_(msg_count),
+       channel_(channel),
+       count_messages_(0) {
+    payload_.resize(msg_size);
+    for (int i = 0; i < static_cast<int>(payload_.size()); i++)
+      payload_[i] = 'a';
+    std::cout << "perflistener up" << std::endl;
+  }
+
+  ~ChannelPerfListener() {
+    std::cout << "Server Messages: " << count_messages_ << std::endl;
+    std::cout << "Server Latency: " << latency_messages_.InMilliseconds()
+              << std::endl;
+  }
+
+  virtual bool OnMessageReceived(const IPC::Message& message) {
+    count_messages_++;
+    // Decode the string so this gets counted in the total time.
+    PickleIterator iter(message);
+    int64 time_internal;
+    EXPECT_TRUE(iter.ReadInt64(&time_internal));
+    int msgid;
+    EXPECT_TRUE(iter.ReadInt(&msgid));
+    std::string cur;
+    EXPECT_TRUE(iter.ReadString(&cur));
+    latency_messages_ += base::TimeTicks::Now() -
+                         base::TimeTicks::FromInternalValue(time_internal);
+
+    count_down_--;
+    if (count_down_ == 0) {
+      IPC::Message* msg = new IPC::Message(0,
+                                           2,
+                                           IPC::Message::PRIORITY_NORMAL);
+      msg->WriteInt64(base::TimeTicks::Now().ToInternalValue());
+      msg->WriteInt(count_down_);
+      msg->WriteString("quit");
+      channel_->Send(msg);
+
+      MessageLoop::current()->QuitWhenIdle();
+      return true;
+    }
+
+    IPC::Message* msg = new IPC::Message(0,
+                                         2,
+                                         IPC::Message::PRIORITY_NORMAL);
+    msg->WriteInt64(base::TimeTicks::Now().ToInternalValue());
+    msg->WriteInt(count_down_);
+    msg->WriteString(payload_);
+    channel_->Send(msg);
+    return true;
+  }
+
+ private:
+  int count_down_;
+  std::string payload_;
+  IPC::Channel *channel_;
+  int count_messages_;
+  base::TimeDelta latency_messages_;
+};
+
+TEST_F(IPCChannelPerfTest, Performance) {
+  // setup IPC channel
+  IPC::Channel chan(kReflectorChannel, IPC::Channel::MODE_SERVER, NULL);
+  ChannelPerfListener perf_listener(&chan, 10000, 100000);
+  chan.set_listener(&perf_listener);
+  ASSERT_TRUE(chan.Connect());
+
+  base::ProcessHandle process_handle = SpawnChild(TEST_REFLECTOR, &chan);
+  ASSERT_TRUE(process_handle);
+
+  base::PlatformThread::Sleep(base::TimeDelta::FromSeconds(1));
+
+  PerfTimeLogger logger("IPC_Perf");
+
+  // this initial message will kick-start the ping-pong of messages
+  IPC::Message* message = new IPC::Message(0,
+                                           2,
+                                           IPC::Message::PRIORITY_NORMAL);
+  message->WriteInt64(base::TimeTicks::Now().ToInternalValue());
+  message->WriteInt(-1);
+  message->WriteString("Hello");
+  chan.Send(message);
+
+  // run message loop
+  MessageLoop::current()->Run();
+
+  // Clean up child process.
+  EXPECT_TRUE(base::WaitForSingleProcess(
+      process_handle, base::TimeDelta::FromSeconds(5)));
+  base::CloseProcessHandle(process_handle);
+}
+
+// This message loop bounces all messages back to the sender
+MULTIPROCESS_IPC_TEST_MAIN(RunReflector) {
+  MessageLoopForIO main_message_loop;
+  IPC::Channel chan(kReflectorChannel, IPC::Channel::MODE_CLIENT, NULL);
+  ChannelReflectorListener channel_reflector_listener(&chan);
+  chan.set_listener(&channel_reflector_listener);
+  CHECK(chan.Connect());
+
+  MessageLoop::current()->Run();
+  return 0;
+}