henrike@webrtc.org | f7795df | 2014-05-13 18:00:26 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2010 The WebRTC Project Authors. All rights reserved. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license |
| 5 | * that can be found in the LICENSE file in the root of the source |
| 6 | * tree. An additional intellectual property rights grant can be found |
| 7 | * in the file PATENTS. All contributing project authors may |
| 8 | * be found in the AUTHORS file in the root of the source tree. |
| 9 | */ |
| 10 | |
| 11 | #include <iomanip> |
| 12 | #include <iostream> |
| 13 | #include <vector> |
| 14 | |
| 15 | #if defined(WEBRTC_WIN) |
| 16 | #include "webrtc/base/win32.h" |
| 17 | #endif |
| 18 | |
| 19 | #include "webrtc/base/cpumonitor.h" |
| 20 | #include "webrtc/base/flags.h" |
| 21 | #include "webrtc/base/gunit.h" |
| 22 | #include "webrtc/base/scoped_ptr.h" |
| 23 | #include "webrtc/base/thread.h" |
| 24 | #include "webrtc/base/timeutils.h" |
| 25 | #include "webrtc/base/timing.h" |
| 26 | |
| 27 | namespace rtc { |
| 28 | |
| 29 | static const int kMaxCpus = 1024; |
| 30 | static const int kSettleTime = 100; // Amount of time to between tests. |
| 31 | static const int kIdleTime = 500; // Amount of time to be idle in ms. |
| 32 | static const int kBusyTime = 1000; // Amount of time to be busy in ms. |
| 33 | static const int kLongInterval = 2000; // Interval longer than busy times |
| 34 | |
| 35 | class BusyThread : public rtc::Thread { |
| 36 | public: |
| 37 | BusyThread(double load, double duration, double interval) : |
| 38 | load_(load), duration_(duration), interval_(interval) { |
| 39 | } |
| 40 | virtual ~BusyThread() { |
| 41 | Stop(); |
| 42 | } |
| 43 | void Run() { |
| 44 | Timing time; |
| 45 | double busy_time = interval_ * load_ / 100.0; |
| 46 | for (;;) { |
| 47 | time.BusyWait(busy_time); |
| 48 | time.IdleWait(interval_ - busy_time); |
| 49 | if (duration_) { |
| 50 | duration_ -= interval_; |
| 51 | if (duration_ <= 0) { |
| 52 | break; |
| 53 | } |
| 54 | } |
| 55 | } |
| 56 | } |
| 57 | private: |
| 58 | double load_; |
| 59 | double duration_; |
| 60 | double interval_; |
| 61 | }; |
| 62 | |
| 63 | class CpuLoadListener : public sigslot::has_slots<> { |
| 64 | public: |
| 65 | CpuLoadListener() |
| 66 | : current_cpus_(0), |
| 67 | cpus_(0), |
| 68 | process_load_(.0f), |
| 69 | system_load_(.0f), |
| 70 | count_(0) { |
| 71 | } |
| 72 | |
| 73 | void OnCpuLoad(int current_cpus, int cpus, float proc_load, float sys_load) { |
| 74 | current_cpus_ = current_cpus; |
| 75 | cpus_ = cpus; |
| 76 | process_load_ = proc_load; |
| 77 | system_load_ = sys_load; |
| 78 | ++count_; |
| 79 | } |
| 80 | |
| 81 | int current_cpus() const { return current_cpus_; } |
| 82 | int cpus() const { return cpus_; } |
| 83 | float process_load() const { return process_load_; } |
| 84 | float system_load() const { return system_load_; } |
| 85 | int count() const { return count_; } |
| 86 | |
| 87 | private: |
| 88 | int current_cpus_; |
| 89 | int cpus_; |
| 90 | float process_load_; |
| 91 | float system_load_; |
| 92 | int count_; |
| 93 | }; |
| 94 | |
| 95 | // Set affinity (which cpu to run on), but respecting FLAG_affinity: |
| 96 | // -1 means no affinity - run on whatever cpu is available. |
| 97 | // 0 .. N means run on specific cpu. The tool will create N threads and call |
| 98 | // SetThreadAffinity on 0 to N - 1 as cpu. FLAG_affinity sets the first cpu |
| 99 | // so the range becomes affinity to affinity + N - 1 |
| 100 | // Note that this function affects Windows scheduling, effectively giving |
| 101 | // the thread with affinity for a specified CPU more priority on that CPU. |
| 102 | bool SetThreadAffinity(BusyThread* t, int cpu, int affinity) { |
| 103 | #if defined(WEBRTC_WIN) |
| 104 | if (affinity >= 0) { |
| 105 | return ::SetThreadAffinityMask(t->GetHandle(), |
| 106 | 1 << (cpu + affinity)) != FALSE; |
| 107 | } |
| 108 | #endif |
| 109 | return true; |
| 110 | } |
| 111 | |
| 112 | bool SetThreadPriority(BusyThread* t, int prio) { |
| 113 | if (!prio) { |
| 114 | return true; |
| 115 | } |
| 116 | bool ok = t->SetPriority(static_cast<rtc::ThreadPriority>(prio)); |
| 117 | if (!ok) { |
| 118 | std::cout << "Error setting thread priority." << std::endl; |
| 119 | } |
| 120 | return ok; |
| 121 | } |
| 122 | |
| 123 | int CpuLoad(double cpuload, double duration, int numthreads, |
| 124 | int priority, double interval, int affinity) { |
| 125 | int ret = 0; |
| 126 | std::vector<BusyThread*> threads; |
| 127 | for (int i = 0; i < numthreads; ++i) { |
| 128 | threads.push_back(new BusyThread(cpuload, duration, interval)); |
| 129 | // NOTE(fbarchard): Priority must be done before Start. |
| 130 | if (!SetThreadPriority(threads[i], priority) || |
| 131 | !threads[i]->Start() || |
| 132 | !SetThreadAffinity(threads[i], i, affinity)) { |
| 133 | ret = 1; |
| 134 | break; |
| 135 | } |
| 136 | } |
| 137 | // Wait on each thread |
| 138 | if (ret == 0) { |
| 139 | for (int i = 0; i < numthreads; ++i) { |
| 140 | threads[i]->Stop(); |
| 141 | } |
| 142 | } |
| 143 | |
| 144 | for (int i = 0; i < numthreads; ++i) { |
| 145 | delete threads[i]; |
| 146 | } |
| 147 | return ret; |
| 148 | } |
| 149 | |
| 150 | // Make 2 CPUs busy |
| 151 | static void CpuTwoBusyLoop(int busytime) { |
| 152 | CpuLoad(100.0, busytime / 1000.0, 2, 1, 0.050, -1); |
| 153 | } |
| 154 | |
| 155 | // Make 1 CPUs busy |
| 156 | static void CpuBusyLoop(int busytime) { |
| 157 | CpuLoad(100.0, busytime / 1000.0, 1, 1, 0.050, -1); |
| 158 | } |
| 159 | |
| 160 | // Make 1 use half CPU time. |
| 161 | static void CpuHalfBusyLoop(int busytime) { |
| 162 | CpuLoad(50.0, busytime / 1000.0, 1, 1, 0.050, -1); |
| 163 | } |
| 164 | |
| 165 | void TestCpuSampler(bool test_proc, bool test_sys, bool force_fallback) { |
| 166 | CpuSampler sampler; |
| 167 | sampler.set_force_fallback(force_fallback); |
| 168 | EXPECT_TRUE(sampler.Init()); |
| 169 | sampler.set_load_interval(100); |
| 170 | int cpus = sampler.GetMaxCpus(); |
| 171 | |
| 172 | // Test1: CpuSampler under idle situation. |
| 173 | Thread::SleepMs(kSettleTime); |
| 174 | sampler.GetProcessLoad(); |
| 175 | sampler.GetSystemLoad(); |
| 176 | |
| 177 | Thread::SleepMs(kIdleTime); |
| 178 | |
| 179 | float proc_idle = 0.f, sys_idle = 0.f; |
| 180 | if (test_proc) { |
| 181 | proc_idle = sampler.GetProcessLoad(); |
| 182 | } |
| 183 | if (test_sys) { |
| 184 | sys_idle = sampler.GetSystemLoad(); |
| 185 | } |
| 186 | if (test_proc) { |
| 187 | LOG(LS_INFO) << "ProcessLoad Idle: " |
| 188 | << std::setiosflags(std::ios_base::fixed) |
| 189 | << std::setprecision(2) << std::setw(6) << proc_idle; |
| 190 | EXPECT_GE(proc_idle, 0.f); |
| 191 | EXPECT_LE(proc_idle, static_cast<float>(cpus)); |
| 192 | } |
| 193 | if (test_sys) { |
| 194 | LOG(LS_INFO) << "SystemLoad Idle: " |
| 195 | << std::setiosflags(std::ios_base::fixed) |
| 196 | << std::setprecision(2) << std::setw(6) << sys_idle; |
| 197 | EXPECT_GE(sys_idle, 0.f); |
| 198 | EXPECT_LE(sys_idle, static_cast<float>(cpus)); |
| 199 | } |
| 200 | |
| 201 | // Test2: CpuSampler with main process at 50% busy. |
| 202 | Thread::SleepMs(kSettleTime); |
| 203 | sampler.GetProcessLoad(); |
| 204 | sampler.GetSystemLoad(); |
| 205 | |
| 206 | CpuHalfBusyLoop(kBusyTime); |
| 207 | |
| 208 | float proc_halfbusy = 0.f, sys_halfbusy = 0.f; |
| 209 | if (test_proc) { |
| 210 | proc_halfbusy = sampler.GetProcessLoad(); |
| 211 | } |
| 212 | if (test_sys) { |
| 213 | sys_halfbusy = sampler.GetSystemLoad(); |
| 214 | } |
| 215 | if (test_proc) { |
| 216 | LOG(LS_INFO) << "ProcessLoad Halfbusy: " |
| 217 | << std::setiosflags(std::ios_base::fixed) |
| 218 | << std::setprecision(2) << std::setw(6) << proc_halfbusy; |
| 219 | EXPECT_GE(proc_halfbusy, 0.f); |
| 220 | EXPECT_LE(proc_halfbusy, static_cast<float>(cpus)); |
| 221 | } |
| 222 | if (test_sys) { |
| 223 | LOG(LS_INFO) << "SystemLoad Halfbusy: " |
| 224 | << std::setiosflags(std::ios_base::fixed) |
| 225 | << std::setprecision(2) << std::setw(6) << sys_halfbusy; |
| 226 | EXPECT_GE(sys_halfbusy, 0.f); |
| 227 | EXPECT_LE(sys_halfbusy, static_cast<float>(cpus)); |
| 228 | } |
| 229 | |
| 230 | // Test3: CpuSampler with main process busy. |
| 231 | Thread::SleepMs(kSettleTime); |
| 232 | sampler.GetProcessLoad(); |
| 233 | sampler.GetSystemLoad(); |
| 234 | |
| 235 | CpuBusyLoop(kBusyTime); |
| 236 | |
| 237 | float proc_busy = 0.f, sys_busy = 0.f; |
| 238 | if (test_proc) { |
| 239 | proc_busy = sampler.GetProcessLoad(); |
| 240 | } |
| 241 | if (test_sys) { |
| 242 | sys_busy = sampler.GetSystemLoad(); |
| 243 | } |
| 244 | if (test_proc) { |
| 245 | LOG(LS_INFO) << "ProcessLoad Busy: " |
| 246 | << std::setiosflags(std::ios_base::fixed) |
| 247 | << std::setprecision(2) << std::setw(6) << proc_busy; |
| 248 | EXPECT_GE(proc_busy, 0.f); |
| 249 | EXPECT_LE(proc_busy, static_cast<float>(cpus)); |
| 250 | } |
| 251 | if (test_sys) { |
| 252 | LOG(LS_INFO) << "SystemLoad Busy: " |
| 253 | << std::setiosflags(std::ios_base::fixed) |
| 254 | << std::setprecision(2) << std::setw(6) << sys_busy; |
| 255 | EXPECT_GE(sys_busy, 0.f); |
| 256 | EXPECT_LE(sys_busy, static_cast<float>(cpus)); |
| 257 | } |
| 258 | |
| 259 | // Test4: CpuSampler with 2 cpus process busy. |
| 260 | if (cpus >= 2) { |
| 261 | Thread::SleepMs(kSettleTime); |
| 262 | sampler.GetProcessLoad(); |
| 263 | sampler.GetSystemLoad(); |
| 264 | |
| 265 | CpuTwoBusyLoop(kBusyTime); |
| 266 | |
| 267 | float proc_twobusy = 0.f, sys_twobusy = 0.f; |
| 268 | if (test_proc) { |
| 269 | proc_twobusy = sampler.GetProcessLoad(); |
| 270 | } |
| 271 | if (test_sys) { |
| 272 | sys_twobusy = sampler.GetSystemLoad(); |
| 273 | } |
| 274 | if (test_proc) { |
| 275 | LOG(LS_INFO) << "ProcessLoad 2 CPU Busy:" |
| 276 | << std::setiosflags(std::ios_base::fixed) |
| 277 | << std::setprecision(2) << std::setw(6) << proc_twobusy; |
| 278 | EXPECT_GE(proc_twobusy, 0.f); |
| 279 | EXPECT_LE(proc_twobusy, static_cast<float>(cpus)); |
| 280 | } |
| 281 | if (test_sys) { |
| 282 | LOG(LS_INFO) << "SystemLoad 2 CPU Busy: " |
| 283 | << std::setiosflags(std::ios_base::fixed) |
| 284 | << std::setprecision(2) << std::setw(6) << sys_twobusy; |
| 285 | EXPECT_GE(sys_twobusy, 0.f); |
| 286 | EXPECT_LE(sys_twobusy, static_cast<float>(cpus)); |
| 287 | } |
| 288 | } |
| 289 | |
| 290 | // Test5: CpuSampler with idle process after being busy. |
| 291 | Thread::SleepMs(kSettleTime); |
| 292 | sampler.GetProcessLoad(); |
| 293 | sampler.GetSystemLoad(); |
| 294 | |
| 295 | Thread::SleepMs(kIdleTime); |
| 296 | |
| 297 | if (test_proc) { |
| 298 | proc_idle = sampler.GetProcessLoad(); |
| 299 | } |
| 300 | if (test_sys) { |
| 301 | sys_idle = sampler.GetSystemLoad(); |
| 302 | } |
| 303 | if (test_proc) { |
| 304 | LOG(LS_INFO) << "ProcessLoad Idle: " |
| 305 | << std::setiosflags(std::ios_base::fixed) |
| 306 | << std::setprecision(2) << std::setw(6) << proc_idle; |
| 307 | EXPECT_GE(proc_idle, 0.f); |
| 308 | EXPECT_LE(proc_idle, proc_busy); |
| 309 | } |
| 310 | if (test_sys) { |
| 311 | LOG(LS_INFO) << "SystemLoad Idle: " |
| 312 | << std::setiosflags(std::ios_base::fixed) |
| 313 | << std::setprecision(2) << std::setw(6) << sys_idle; |
| 314 | EXPECT_GE(sys_idle, 0.f); |
| 315 | EXPECT_LE(sys_idle, static_cast<float>(cpus)); |
| 316 | } |
| 317 | } |
| 318 | |
| 319 | TEST(CpuMonitorTest, TestCpus) { |
| 320 | CpuSampler sampler; |
| 321 | EXPECT_TRUE(sampler.Init()); |
| 322 | int current_cpus = sampler.GetCurrentCpus(); |
| 323 | int cpus = sampler.GetMaxCpus(); |
| 324 | LOG(LS_INFO) << "Current Cpus: " << std::setw(9) << current_cpus; |
| 325 | LOG(LS_INFO) << "Maximum Cpus: " << std::setw(9) << cpus; |
| 326 | EXPECT_GT(cpus, 0); |
| 327 | EXPECT_LE(cpus, kMaxCpus); |
| 328 | EXPECT_GT(current_cpus, 0); |
| 329 | EXPECT_LE(current_cpus, cpus); |
| 330 | } |
| 331 | |
| 332 | #if defined(WEBRTC_WIN) |
| 333 | // Tests overall system CpuSampler using legacy OS fallback code if applicable. |
| 334 | TEST(CpuMonitorTest, TestGetSystemLoadForceFallback) { |
| 335 | TestCpuSampler(false, true, true); |
| 336 | } |
| 337 | #endif |
| 338 | |
| 339 | // Tests both process and system functions in use at same time. |
| 340 | TEST(CpuMonitorTest, TestGetBothLoad) { |
| 341 | TestCpuSampler(true, true, false); |
| 342 | } |
| 343 | |
| 344 | // Tests a query less than the interval produces the same value. |
| 345 | TEST(CpuMonitorTest, TestInterval) { |
| 346 | CpuSampler sampler; |
| 347 | EXPECT_TRUE(sampler.Init()); |
| 348 | |
| 349 | // Test1: Set interval to large value so sampler will not update. |
| 350 | sampler.set_load_interval(kLongInterval); |
| 351 | |
| 352 | sampler.GetProcessLoad(); |
| 353 | sampler.GetSystemLoad(); |
| 354 | |
| 355 | float proc_orig = sampler.GetProcessLoad(); |
| 356 | float sys_orig = sampler.GetSystemLoad(); |
| 357 | |
| 358 | Thread::SleepMs(kIdleTime); |
| 359 | |
| 360 | float proc_halftime = sampler.GetProcessLoad(); |
| 361 | float sys_halftime = sampler.GetSystemLoad(); |
| 362 | |
| 363 | EXPECT_EQ(proc_orig, proc_halftime); |
| 364 | EXPECT_EQ(sys_orig, sys_halftime); |
| 365 | } |
| 366 | |
| 367 | TEST(CpuMonitorTest, TestCpuMonitor) { |
| 368 | CpuMonitor monitor(Thread::Current()); |
| 369 | CpuLoadListener listener; |
| 370 | monitor.SignalUpdate.connect(&listener, &CpuLoadListener::OnCpuLoad); |
| 371 | EXPECT_TRUE(monitor.Start(10)); |
| 372 | // We have checked cpu load more than twice. |
| 373 | EXPECT_TRUE_WAIT(listener.count() > 2, 1000); |
| 374 | EXPECT_GT(listener.current_cpus(), 0); |
| 375 | EXPECT_GT(listener.cpus(), 0); |
| 376 | EXPECT_GE(listener.process_load(), .0f); |
| 377 | EXPECT_GE(listener.system_load(), .0f); |
| 378 | |
| 379 | monitor.Stop(); |
| 380 | // Wait 20 ms to ake sure all signals are delivered. |
| 381 | Thread::Current()->ProcessMessages(20); |
| 382 | int old_count = listener.count(); |
| 383 | Thread::Current()->ProcessMessages(20); |
| 384 | // Verfy no more siganls. |
| 385 | EXPECT_EQ(old_count, listener.count()); |
| 386 | } |
| 387 | |
| 388 | } // namespace rtc |