Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1 | // Copyright 2014 the V8 project 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 "src/base/platform/time.h" |
| 6 | |
| 7 | #if V8_OS_MACOSX |
| 8 | #include <mach/mach_time.h> |
| 9 | #endif |
| 10 | #if V8_OS_POSIX |
| 11 | #include <sys/time.h> |
| 12 | #endif |
| 13 | |
| 14 | #if V8_OS_WIN |
| 15 | #include "src/base/win32-headers.h" |
| 16 | #endif |
| 17 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 18 | #include <vector> |
| 19 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 20 | #include "src/base/platform/elapsed-timer.h" |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 21 | #include "src/base/platform/platform.h" |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 22 | #include "testing/gtest/include/gtest/gtest.h" |
| 23 | |
| 24 | namespace v8 { |
| 25 | namespace base { |
| 26 | |
| 27 | TEST(TimeDelta, FromAndIn) { |
| 28 | EXPECT_EQ(TimeDelta::FromDays(2), TimeDelta::FromHours(48)); |
| 29 | EXPECT_EQ(TimeDelta::FromHours(3), TimeDelta::FromMinutes(180)); |
| 30 | EXPECT_EQ(TimeDelta::FromMinutes(2), TimeDelta::FromSeconds(120)); |
| 31 | EXPECT_EQ(TimeDelta::FromSeconds(2), TimeDelta::FromMilliseconds(2000)); |
| 32 | EXPECT_EQ(TimeDelta::FromMilliseconds(2), TimeDelta::FromMicroseconds(2000)); |
| 33 | EXPECT_EQ(static_cast<int>(13), TimeDelta::FromDays(13).InDays()); |
| 34 | EXPECT_EQ(static_cast<int>(13), TimeDelta::FromHours(13).InHours()); |
| 35 | EXPECT_EQ(static_cast<int>(13), TimeDelta::FromMinutes(13).InMinutes()); |
| 36 | EXPECT_EQ(static_cast<int64_t>(13), TimeDelta::FromSeconds(13).InSeconds()); |
| 37 | EXPECT_DOUBLE_EQ(13.0, TimeDelta::FromSeconds(13).InSecondsF()); |
| 38 | EXPECT_EQ(static_cast<int64_t>(13), |
| 39 | TimeDelta::FromMilliseconds(13).InMilliseconds()); |
| 40 | EXPECT_DOUBLE_EQ(13.0, TimeDelta::FromMilliseconds(13).InMillisecondsF()); |
| 41 | EXPECT_EQ(static_cast<int64_t>(13), |
| 42 | TimeDelta::FromMicroseconds(13).InMicroseconds()); |
| 43 | } |
| 44 | |
| 45 | |
| 46 | #if V8_OS_MACOSX |
| 47 | TEST(TimeDelta, MachTimespec) { |
| 48 | TimeDelta null = TimeDelta(); |
| 49 | EXPECT_EQ(null, TimeDelta::FromMachTimespec(null.ToMachTimespec())); |
| 50 | TimeDelta delta1 = TimeDelta::FromMilliseconds(42); |
| 51 | EXPECT_EQ(delta1, TimeDelta::FromMachTimespec(delta1.ToMachTimespec())); |
| 52 | TimeDelta delta2 = TimeDelta::FromDays(42); |
| 53 | EXPECT_EQ(delta2, TimeDelta::FromMachTimespec(delta2.ToMachTimespec())); |
| 54 | } |
| 55 | #endif |
| 56 | |
| 57 | |
| 58 | TEST(Time, JsTime) { |
| 59 | Time t = Time::FromJsTime(700000.3); |
| 60 | EXPECT_DOUBLE_EQ(700000.3, t.ToJsTime()); |
| 61 | } |
| 62 | |
| 63 | |
| 64 | #if V8_OS_POSIX |
| 65 | TEST(Time, Timespec) { |
| 66 | Time null; |
| 67 | EXPECT_TRUE(null.IsNull()); |
| 68 | EXPECT_EQ(null, Time::FromTimespec(null.ToTimespec())); |
| 69 | Time now = Time::Now(); |
| 70 | EXPECT_EQ(now, Time::FromTimespec(now.ToTimespec())); |
| 71 | Time now_sys = Time::NowFromSystemTime(); |
| 72 | EXPECT_EQ(now_sys, Time::FromTimespec(now_sys.ToTimespec())); |
| 73 | Time unix_epoch = Time::UnixEpoch(); |
| 74 | EXPECT_EQ(unix_epoch, Time::FromTimespec(unix_epoch.ToTimespec())); |
| 75 | Time max = Time::Max(); |
| 76 | EXPECT_TRUE(max.IsMax()); |
| 77 | EXPECT_EQ(max, Time::FromTimespec(max.ToTimespec())); |
| 78 | } |
| 79 | |
| 80 | |
| 81 | TEST(Time, Timeval) { |
| 82 | Time null; |
| 83 | EXPECT_TRUE(null.IsNull()); |
| 84 | EXPECT_EQ(null, Time::FromTimeval(null.ToTimeval())); |
| 85 | Time now = Time::Now(); |
| 86 | EXPECT_EQ(now, Time::FromTimeval(now.ToTimeval())); |
| 87 | Time now_sys = Time::NowFromSystemTime(); |
| 88 | EXPECT_EQ(now_sys, Time::FromTimeval(now_sys.ToTimeval())); |
| 89 | Time unix_epoch = Time::UnixEpoch(); |
| 90 | EXPECT_EQ(unix_epoch, Time::FromTimeval(unix_epoch.ToTimeval())); |
| 91 | Time max = Time::Max(); |
| 92 | EXPECT_TRUE(max.IsMax()); |
| 93 | EXPECT_EQ(max, Time::FromTimeval(max.ToTimeval())); |
| 94 | } |
| 95 | #endif |
| 96 | |
| 97 | |
| 98 | #if V8_OS_WIN |
| 99 | TEST(Time, Filetime) { |
| 100 | Time null; |
| 101 | EXPECT_TRUE(null.IsNull()); |
| 102 | EXPECT_EQ(null, Time::FromFiletime(null.ToFiletime())); |
| 103 | Time now = Time::Now(); |
| 104 | EXPECT_EQ(now, Time::FromFiletime(now.ToFiletime())); |
| 105 | Time now_sys = Time::NowFromSystemTime(); |
| 106 | EXPECT_EQ(now_sys, Time::FromFiletime(now_sys.ToFiletime())); |
| 107 | Time unix_epoch = Time::UnixEpoch(); |
| 108 | EXPECT_EQ(unix_epoch, Time::FromFiletime(unix_epoch.ToFiletime())); |
| 109 | Time max = Time::Max(); |
| 110 | EXPECT_TRUE(max.IsMax()); |
| 111 | EXPECT_EQ(max, Time::FromFiletime(max.ToFiletime())); |
| 112 | } |
| 113 | #endif |
| 114 | |
| 115 | |
| 116 | namespace { |
| 117 | |
| 118 | template <typename T> |
| 119 | static void ResolutionTest(T (*Now)(), TimeDelta target_granularity) { |
| 120 | // We're trying to measure that intervals increment in a VERY small amount |
| 121 | // of time -- according to the specified target granularity. Unfortunately, |
| 122 | // if we happen to have a context switch in the middle of our test, the |
| 123 | // context switch could easily exceed our limit. So, we iterate on this |
| 124 | // several times. As long as we're able to detect the fine-granularity |
| 125 | // timers at least once, then the test has succeeded. |
| 126 | static const TimeDelta kExpirationTimeout = TimeDelta::FromSeconds(1); |
| 127 | ElapsedTimer timer; |
| 128 | timer.Start(); |
| 129 | TimeDelta delta; |
| 130 | do { |
| 131 | T start = Now(); |
| 132 | T now = start; |
| 133 | // Loop until we can detect that the clock has changed. Non-HighRes timers |
| 134 | // will increment in chunks, i.e. 15ms. By spinning until we see a clock |
| 135 | // change, we detect the minimum time between measurements. |
| 136 | do { |
| 137 | now = Now(); |
| 138 | delta = now - start; |
| 139 | } while (now <= start); |
| 140 | EXPECT_NE(static_cast<int64_t>(0), delta.InMicroseconds()); |
| 141 | } while (delta > target_granularity && !timer.HasExpired(kExpirationTimeout)); |
| 142 | EXPECT_LE(delta, target_granularity); |
| 143 | } |
| 144 | |
| 145 | } // namespace |
| 146 | |
| 147 | |
| 148 | TEST(Time, NowResolution) { |
| 149 | // We assume that Time::Now() has at least 16ms resolution. |
| 150 | static const TimeDelta kTargetGranularity = TimeDelta::FromMilliseconds(16); |
| 151 | ResolutionTest<Time>(&Time::Now, kTargetGranularity); |
| 152 | } |
| 153 | |
| 154 | |
| 155 | TEST(TimeTicks, NowResolution) { |
| 156 | // We assume that TimeTicks::Now() has at least 16ms resolution. |
| 157 | static const TimeDelta kTargetGranularity = TimeDelta::FromMilliseconds(16); |
| 158 | ResolutionTest<TimeTicks>(&TimeTicks::Now, kTargetGranularity); |
| 159 | } |
| 160 | |
| 161 | |
| 162 | TEST(TimeTicks, HighResolutionNowResolution) { |
| 163 | if (!TimeTicks::IsHighResolutionClockWorking()) return; |
| 164 | |
| 165 | // We assume that TimeTicks::HighResolutionNow() has sub-ms resolution. |
| 166 | static const TimeDelta kTargetGranularity = TimeDelta::FromMilliseconds(1); |
| 167 | ResolutionTest<TimeTicks>(&TimeTicks::HighResolutionNow, kTargetGranularity); |
| 168 | } |
| 169 | |
| 170 | |
| 171 | TEST(TimeTicks, IsMonotonic) { |
| 172 | TimeTicks previous_normal_ticks; |
| 173 | TimeTicks previous_highres_ticks; |
| 174 | ElapsedTimer timer; |
| 175 | timer.Start(); |
| 176 | while (!timer.HasExpired(TimeDelta::FromMilliseconds(100))) { |
| 177 | TimeTicks normal_ticks = TimeTicks::Now(); |
| 178 | TimeTicks highres_ticks = TimeTicks::HighResolutionNow(); |
| 179 | EXPECT_GE(normal_ticks, previous_normal_ticks); |
| 180 | EXPECT_GE((normal_ticks - previous_normal_ticks).InMicroseconds(), 0); |
| 181 | EXPECT_GE(highres_ticks, previous_highres_ticks); |
| 182 | EXPECT_GE((highres_ticks - previous_highres_ticks).InMicroseconds(), 0); |
| 183 | previous_normal_ticks = normal_ticks; |
| 184 | previous_highres_ticks = highres_ticks; |
| 185 | } |
| 186 | } |
| 187 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 188 | |
| 189 | // Disable on windows until it is implemented. |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 190 | #if V8_OS_ANDROID |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 191 | #define MAYBE_ThreadNow DISABLED_ThreadNow |
| 192 | #else |
| 193 | #define MAYBE_ThreadNow ThreadNow |
| 194 | #endif |
| 195 | TEST(ThreadTicks, MAYBE_ThreadNow) { |
| 196 | if (ThreadTicks::IsSupported()) { |
| 197 | TimeTicks begin = TimeTicks::Now(); |
| 198 | ThreadTicks begin_thread = ThreadTicks::Now(); |
| 199 | // Make sure that ThreadNow value is non-zero. |
| 200 | EXPECT_GT(begin_thread, ThreadTicks()); |
| 201 | // Sleep for 10 milliseconds to get the thread de-scheduled. |
| 202 | OS::Sleep(base::TimeDelta::FromMilliseconds(10)); |
| 203 | ThreadTicks end_thread = ThreadTicks::Now(); |
| 204 | TimeTicks end = TimeTicks::Now(); |
| 205 | TimeDelta delta = end - begin; |
| 206 | TimeDelta delta_thread = end_thread - begin_thread; |
| 207 | // Make sure that some thread time have elapsed. |
| 208 | EXPECT_GT(delta_thread.InMicroseconds(), 0); |
| 209 | // But the thread time is at least 9ms less than clock time. |
| 210 | TimeDelta difference = delta - delta_thread; |
| 211 | EXPECT_GE(difference.InMicroseconds(), 9000); |
| 212 | } |
| 213 | } |
| 214 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 215 | |
| 216 | #if V8_OS_WIN |
| 217 | TEST(TimeTicks, TimerPerformance) { |
| 218 | // Verify that various timer mechanisms can always complete quickly. |
| 219 | // Note: This is a somewhat arbitrary test. |
| 220 | const int kLoops = 10000; |
| 221 | |
| 222 | typedef TimeTicks (*TestFunc)(); |
| 223 | struct TestCase { |
| 224 | TestFunc func; |
| 225 | const char *description; |
| 226 | }; |
| 227 | // Cheating a bit here: assumes sizeof(TimeTicks) == sizeof(Time) |
| 228 | // in order to create a single test case list. |
| 229 | static_assert(sizeof(TimeTicks) == sizeof(Time), |
| 230 | "TimeTicks and Time must be the same size"); |
| 231 | std::vector<TestCase> cases; |
| 232 | cases.push_back({reinterpret_cast<TestFunc>(&Time::Now), "Time::Now"}); |
| 233 | cases.push_back({&TimeTicks::Now, "TimeTicks::Now"}); |
| 234 | |
| 235 | if (ThreadTicks::IsSupported()) { |
| 236 | ThreadTicks::WaitUntilInitialized(); |
| 237 | cases.push_back( |
| 238 | {reinterpret_cast<TestFunc>(&ThreadTicks::Now), "ThreadTicks::Now"}); |
| 239 | } |
| 240 | |
| 241 | for (const auto& test_case : cases) { |
| 242 | TimeTicks start = TimeTicks::Now(); |
| 243 | for (int index = 0; index < kLoops; index++) |
| 244 | test_case.func(); |
| 245 | TimeTicks stop = TimeTicks::Now(); |
| 246 | // Turning off the check for acceptible delays. Without this check, |
| 247 | // the test really doesn't do much other than measure. But the |
| 248 | // measurements are still useful for testing timers on various platforms. |
| 249 | // The reason to remove the check is because the tests run on many |
| 250 | // buildbots, some of which are VMs. These machines can run horribly |
| 251 | // slow, and there is really no value for checking against a max timer. |
| 252 | // const int kMaxTime = 35; // Maximum acceptible milliseconds for test. |
| 253 | // EXPECT_LT((stop - start).InMilliseconds(), kMaxTime); |
| 254 | printf("%s: %1.2fus per call\n", test_case.description, |
| 255 | (stop - start).InMillisecondsF() * 1000 / kLoops); |
| 256 | } |
| 257 | } |
| 258 | #endif // V8_OS_WIN |
| 259 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 260 | } // namespace base |
| 261 | } // namespace v8 |