ipc/ipc_perftest_support.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ipc/ipc_perftest_support.h"
   6
   7 #include <algorithm>
   8 #include <string>
   9
  10 #include "base/logging.h"
  11 #include "base/macros.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "base/pickle.h"
  14 #include "base/strings/stringprintf.h"
  15 #include "base/test/perf_time_logger.h"
  16 #include "base/test/test_io_thread.h"
  17 #include "base/threading/thread.h"
  18 #include "base/time/time.h"
  19 #include "build/build_config.h"
  20 #include "ipc/ipc_channel.h"
  21 #include "ipc/ipc_channel_proxy.h"
  22 #include "ipc/ipc_descriptors.h"
  23 #include "ipc/ipc_message_utils.h"
  24 #include "ipc/ipc_sender.h"
  25
  26 namespace IPC {
  27 namespace test {
  28
  29 // Avoid core 0 due to conflicts with Intel's Power Gadget.
  30 // Setting thread affinity will fail harmlessly on single/dual core machines.
  31 const int kSharedCore = 2;
  32
  33 // This class simply collects stats about abstract "events" (each of which has a
  34 // start time and an end time).
  35 class EventTimeTracker {
  36  public:
  37   explicit EventTimeTracker(const char* name)
  38       : name_(name),
  39         count_(0) {
  40   }
  41
  42   void AddEvent(const base::TimeTicks& start, const base::TimeTicks& end) {
  43     DCHECK(end >= start);
  44     count_++;
  45     base::TimeDelta duration = end - start;
  46     total_duration_ += duration;
  47     max_duration_ = std::max(max_duration_, duration);
  48   }
  49
  50   void ShowResults() const {
  51     VLOG(1) << name_ << " count: " << count_;
  52     VLOG(1) << name_ << " total duration: "
  53             << total_duration_.InMillisecondsF() << " ms";
  54     VLOG(1) << name_ << " average duration: "
  55             << (total_duration_.InMillisecondsF() / static_cast<double>(count_))
  56             << " ms";
  57     VLOG(1) << name_ << " maximum duration: "
  58             << max_duration_.InMillisecondsF() << " ms";
  59   }
  60
  61   void Reset() {
  62     count_ = 0;
  63     total_duration_ = base::TimeDelta();
  64     max_duration_ = base::TimeDelta();
  65   }
  66
  67  private:
  68   const std::string name_;
  69
  70   uint64_t count_;
  71   base::TimeDelta total_duration_;
  72   base::TimeDelta max_duration_;
  73
  74   DISALLOW_COPY_AND_ASSIGN(EventTimeTracker);
  75 };
  76
  77 // This channel listener just replies to all messages with the exact same
  78 // message. It assumes each message has one string parameter. When the string
  79 // "quit" is sent, it will exit.
  80 class ChannelReflectorListener : public Listener {
  81  public:
  82   ChannelReflectorListener()
  83       : channel_(NULL),
  84         latency_tracker_("Client messages") {
  85     VLOG(1) << "Client listener up";
  86   }
  87
  88   ~ChannelReflectorListener() override {
  89     VLOG(1) << "Client listener down";
  90     latency_tracker_.ShowResults();
  91   }
  92
  93   void Init(Channel* channel) {
  94     DCHECK(!channel_);
  95     channel_ = channel;
  96   }
  97
  98   bool OnMessageReceived(const Message& message) override {
  99     CHECK(channel_);
 100
 101     base::PickleIterator iter(message);
 102     int64_t time_internal;
 103     EXPECT_TRUE(iter.ReadInt64(&time_internal));
 104     int msgid;
 105     EXPECT_TRUE(iter.ReadInt(&msgid));
 106     base::StringPiece payload;
 107     EXPECT_TRUE(iter.ReadStringPiece(&payload));
 108
 109     // Include message deserialization in latency.
 110     base::TimeTicks now = base::TimeTicks::Now();
 111
 112     if (payload == "hello") {
 113       latency_tracker_.Reset();
 114     } else if (payload == "quit") {
 115       latency_tracker_.ShowResults();
 116       base::MessageLoop::current()->QuitWhenIdle();
 117       return true;
 118     } else {
 119       // Don't track hello and quit messages.
 120       latency_tracker_.AddEvent(
 121           base::TimeTicks::FromInternalValue(time_internal), now);
 122     }
 123
 124     Message* msg = new Message(0, 2, Message::PRIORITY_NORMAL);
 125     msg->WriteInt64(base::TimeTicks::Now().ToInternalValue());
 126     msg->WriteInt(msgid);
 127     msg->WriteString(payload);
 128     channel_->Send(msg);
 129     return true;
 130   }
 131
 132  private:
 133   Channel* channel_;
 134   EventTimeTracker latency_tracker_;
 135 };
 136
 137 class PerformanceChannelListener : public Listener {
 138  public:
 139   explicit PerformanceChannelListener(const std::string& label)
 140       : label_(label),
 141         sender_(NULL),
 142         msg_count_(0),
 143         msg_size_(0),
 144         count_down_(0),
 145         latency_tracker_("Server messages") {
 146     VLOG(1) << "Server listener up";
 147   }
 148
 149   ~PerformanceChannelListener() override {
 150     VLOG(1) << "Server listener down";
 151   }
 152
 153   void Init(Sender* sender) {
 154     DCHECK(!sender_);
 155     sender_ = sender;
 156   }
 157
 158   // Call this before running the message loop.
 159   void SetTestParams(int msg_count, size_t msg_size) {
 160     DCHECK_EQ(0, count_down_);
 161     msg_count_ = msg_count;
 162     msg_size_ = msg_size;
 163     count_down_ = msg_count_;
 164     payload_ = std::string(msg_size_, 'a');
 165   }
 166
 167   bool OnMessageReceived(const Message& message) override {
 168     CHECK(sender_);
 169
 170     base::PickleIterator iter(message);
 171     int64_t time_internal;
 172     EXPECT_TRUE(iter.ReadInt64(&time_internal));
 173     int msgid;
 174     EXPECT_TRUE(iter.ReadInt(&msgid));
 175     std::string reflected_payload;
 176     EXPECT_TRUE(iter.ReadString(&reflected_payload));
 177
 178     // Include message deserialization in latency.
 179     base::TimeTicks now = base::TimeTicks::Now();
 180
 181     if (reflected_payload == "hello") {
 182       // Start timing on hello.
 183       latency_tracker_.Reset();
 184       DCHECK(!perf_logger_.get());
 185       std::string test_name =
 186           base::StringPrintf("IPC_%s_Perf_%dx_%u",
 187                              label_.c_str(),
 188                              msg_count_,
 189                              static_cast<unsigned>(msg_size_));
 190       perf_logger_.reset(new base::PerfTimeLogger(test_name.c_str()));
 191     } else {
 192       DCHECK_EQ(payload_.size(), reflected_payload.size());
 193
 194       latency_tracker_.AddEvent(
 195           base::TimeTicks::FromInternalValue(time_internal), now);
 196
 197       CHECK(count_down_ > 0);
 198       count_down_--;
 199       if (count_down_ == 0) {
 200         perf_logger_.reset();  // Stop the perf timer now.
 201         latency_tracker_.ShowResults();
 202         base::MessageLoop::current()->QuitWhenIdle();
 203         return true;
 204       }
 205     }
 206
 207     Message* msg = new Message(0, 2, Message::PRIORITY_NORMAL);
 208     msg->WriteInt64(base::TimeTicks::Now().ToInternalValue());
 209     msg->WriteInt(count_down_);
 210     msg->WriteString(payload_);
 211     sender_->Send(msg);
 212     return true;
 213   }
 214
 215  private:
 216   std::string label_;
 217   Sender* sender_;
 218   int msg_count_;
 219   size_t msg_size_;
 220
 221   int count_down_;
 222   std::string payload_;
 223   EventTimeTracker latency_tracker_;
 224   scoped_ptr<base::PerfTimeLogger> perf_logger_;
 225 };
 226
 227 std::vector<PingPongTestParams>
 228 IPCChannelPerfTestBase::GetDefaultTestParams() {
 229   // Test several sizes. We use 12^N for message size, and limit the message
 230   // count to keep the test duration reasonable.
 231   std::vector<PingPongTestParams> list;
 232   list.push_back(PingPongTestParams(12, 50000));
 233   list.push_back(PingPongTestParams(144, 50000));
 234   list.push_back(PingPongTestParams(1728, 50000));
 235   list.push_back(PingPongTestParams(20736, 12000));
 236   list.push_back(PingPongTestParams(248832, 1000));
 237   return list;
 238 }
 239
 240 void IPCChannelPerfTestBase::RunTestChannelPingPong(
 241     const std::vector<PingPongTestParams>& params) {
 242   Init("PerformanceClient");
 243
 244   // Set up IPC channel and start client.
 245   PerformanceChannelListener listener("Channel");
 246   CreateChannel(&listener);
 247   listener.Init(channel());
 248   ASSERT_TRUE(ConnectChannel());
 249   ASSERT_TRUE(StartClient());
 250
 251   LockThreadAffinity thread_locker(kSharedCore);
 252   for (size_t i = 0; i < params.size(); i++) {
 253     listener.SetTestParams(params[i].message_count(),
 254                            params[i].message_size());
 255
 256     // This initial message will kick-start the ping-pong of messages.
 257     Message* message =
 258         new Message(0, 2, Message::PRIORITY_NORMAL);
 259     message->WriteInt64(base::TimeTicks::Now().ToInternalValue());
 260     message->WriteInt(-1);
 261     message->WriteString("hello");
 262     sender()->Send(message);
 263
 264     // Run message loop.
 265     base::MessageLoop::current()->Run();
 266   }
 267
 268   // Send quit message.
 269   Message* message = new Message(0, 2, Message::PRIORITY_NORMAL);
 270   message->WriteInt64(base::TimeTicks::Now().ToInternalValue());
 271   message->WriteInt(-1);
 272   message->WriteString("quit");
 273   sender()->Send(message);
 274
 275   EXPECT_TRUE(WaitForClientShutdown());
 276   DestroyChannel();
 277 }
 278
 279 void IPCChannelPerfTestBase::RunTestChannelProxyPingPong(
 280     const std::vector<PingPongTestParams>& params) {
 281   InitWithCustomMessageLoop("PerformanceClient",
 282                             make_scoped_ptr(new base::MessageLoop()));
 283
 284   base::TestIOThread io_thread(base::TestIOThread::kAutoStart);
 285
 286   // Set up IPC channel and start client.
 287   PerformanceChannelListener listener("ChannelProxy");
 288   CreateChannelProxy(&listener, io_thread.task_runner());
 289   listener.Init(channel_proxy());
 290   ASSERT_TRUE(StartClient());
 291
 292   LockThreadAffinity thread_locker(kSharedCore);
 293   for (size_t i = 0; i < params.size(); i++) {
 294     listener.SetTestParams(params[i].message_count(),
 295                            params[i].message_size());
 296
 297     // This initial message will kick-start the ping-pong of messages.
 298     Message* message =
 299         new Message(0, 2, Message::PRIORITY_NORMAL);
 300     message->WriteInt64(base::TimeTicks::Now().ToInternalValue());
 301     message->WriteInt(-1);
 302     message->WriteString("hello");
 303     sender()->Send(message);
 304
 305     // Run message loop.
 306     base::MessageLoop::current()->Run();
 307   }
 308
 309   // Send quit message.
 310   Message* message = new Message(0, 2, Message::PRIORITY_NORMAL);
 311   message->WriteInt64(base::TimeTicks::Now().ToInternalValue());
 312   message->WriteInt(-1);
 313   message->WriteString("quit");
 314   sender()->Send(message);
 315
 316   EXPECT_TRUE(WaitForClientShutdown());
 317   DestroyChannelProxy();
 318 }
 319
 320
 321 PingPongTestClient::PingPongTestClient()
 322     : listener_(new ChannelReflectorListener()) {
 323 }
 324
 325 PingPongTestClient::~PingPongTestClient() {
 326 }
 327
 328 scoped_ptr<Channel> PingPongTestClient::CreateChannel(
 329     Listener* listener) {
 330   return Channel::CreateClient(IPCTestBase::GetChannelName("PerformanceClient"),
 331                                listener, nullptr);
 332 }
 333
 334 int PingPongTestClient::RunMain() {
 335   LockThreadAffinity thread_locker(kSharedCore);
 336   scoped_ptr<Channel> channel = CreateChannel(listener_.get());
 337   listener_->Init(channel.get());
 338   CHECK(channel->Connect());
 339
 340   base::MessageLoop::current()->Run();
 341   return 0;
 342 }
 343
 344 scoped_refptr<base::TaskRunner> PingPongTestClient::task_runner() {
 345   return main_message_loop_.task_runner();
 346 }
 347
 348 LockThreadAffinity::LockThreadAffinity(int cpu_number)
 349     : affinity_set_ok_(false) {
 350 #if defined(OS_WIN)
 351   const DWORD_PTR thread_mask = 1 << cpu_number;
 352   old_affinity_ = SetThreadAffinityMask(GetCurrentThread(), thread_mask);
 353   affinity_set_ok_ = old_affinity_ != 0;
 354 #elif defined(OS_LINUX)
 355   cpu_set_t cpuset;
 356   CPU_ZERO(&cpuset);
 357   CPU_SET(cpu_number, &cpuset);
 358   auto get_result = sched_getaffinity(0, sizeof(old_cpuset_), &old_cpuset_);
 359   DCHECK_EQ(0, get_result);
 360   auto set_result = sched_setaffinity(0, sizeof(cpuset), &cpuset);
 361   // Check for get_result failure, even though it should always succeed.
 362   affinity_set_ok_ = (set_result == 0) && (get_result == 0);
 363 #endif
 364   if (!affinity_set_ok_)
 365     LOG(WARNING) << "Failed to set thread affinity to CPU " << cpu_number;
 366 }
 367
 368 LockThreadAffinity::~LockThreadAffinity() {
 369   if (!affinity_set_ok_)
 370     return;
 371 #if defined(OS_WIN)
 372   auto set_result = SetThreadAffinityMask(GetCurrentThread(), old_affinity_);
 373   DCHECK_NE(0u, set_result);
 374 #elif defined(OS_LINUX)
 375   auto set_result = sched_setaffinity(0, sizeof(old_cpuset_), &old_cpuset_);
 376   DCHECK_EQ(0, set_result);
 377 #endif
 378 }
 379
 380 }  // namespace test
 381 }  // namespace IPC