chromium/ipc/ipc_perftest_util.h

// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef IPC_IPC_PERFTEST_UTIL_H_
#define IPC_IPC_PERFTEST_UTIL_H_

#include <string>

#include "base/memory/raw_ptr.h"
#include "base/task/single_thread_task_runner.h"
#include "build/build_config.h"

#if BUILDFLAG(IS_WIN)
#include <windows.h>
#endif

#include "base/functional/callback.h"
#include "base/memory/ref_counted.h"
#include "base/process/process_metrics.h"
#include "base/task/single_thread_task_executor.h"
#include "base/task/single_thread_task_runner.h"
#include "build/build_config.h"
#include "ipc/ipc_channel.h"
#include "ipc/ipc_listener.h"
#include "ipc/ipc_message.h"
#include "ipc/ipc_sender.h"
#include "ipc/ipc_test.mojom.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "mojo/public/cpp/system/message_pipe.h"

#if BUILDFLAG(IS_WIN)
#include <windows.h>
#endif

namespace IPC {

scoped_refptr<base::SingleThreadTaskRunner> GetIOThreadTaskRunner();

// 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 Listener { … };

// This class locks the current thread to a particular CPU core. This is
// important because otherwise the different threads and processes of these
// tests end up on different CPU cores which means that all of the cores are
// lightly loaded so the OS (Windows and Linux) fails to ramp up the CPU
// frequency, leading to unpredictable and often poor performance.
class LockThreadAffinity { … };

// Avoid core 0 due to conflicts with Intel's Power Gadget.
// Setting thread affinity will fail harmlessly on single/dual core machines.
const int kSharedCore = …;

class MojoPerfTestClient { … };

class ReflectorImpl : public IPC::mojom::Reflector { … };

}  // namespace IPC

#endif  // IPC_IPC_PERFTEST_UTIL_H_