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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/metrics/histogram_macros.h"
#include "base/test/metrics/histogram_tester.h"
#include "base/time/time.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace base {
TEST(ScopedHistogramTimer, ThreeTimersOneScope) {
SCOPED_UMA_HISTOGRAM_TIMER_MICROS("TestShortTimer0");
SCOPED_UMA_HISTOGRAM_TIMER_MICROS("TestShortTimer1");
SCOPED_UMA_HISTOGRAM_TIMER("TestTimer0");
SCOPED_UMA_HISTOGRAM_TIMER("TestTimer1");
SCOPED_UMA_HISTOGRAM_LONG_TIMER("TestLongTimer0");
SCOPED_UMA_HISTOGRAM_LONG_TIMER("TestLongTimer1");
}
// Compile tests for UMA_HISTOGRAM_ENUMERATION with the three different types it
// accepts:
// - integral types
// - unscoped enums
// - scoped enums
TEST(HistogramMacro, IntegralPseudoEnumeration) {
UMA_HISTOGRAM_ENUMERATION("Test.FauxEnumeration", 1, 1000);
}
TEST(HistogramMacro, UnscopedEnumeration) {
enum TestEnum : char {
FIRST_VALUE,
SECOND_VALUE,
THIRD_VALUE,
MAX_ENTRIES,
};
UMA_HISTOGRAM_ENUMERATION("Test.UnscopedEnumeration", SECOND_VALUE,
MAX_ENTRIES);
}
TEST(HistogramMacro, ScopedEnumeration) {
enum class TestEnum {
FIRST_VALUE,
SECOND_VALUE,
THIRD_VALUE,
kMaxValue = THIRD_VALUE,
};
UMA_HISTOGRAM_ENUMERATION("Test.ScopedEnumeration", TestEnum::FIRST_VALUE);
enum class TestEnum2 {
FIRST_VALUE,
SECOND_VALUE,
THIRD_VALUE,
MAX_ENTRIES,
};
UMA_HISTOGRAM_ENUMERATION("Test.ScopedEnumeration2", TestEnum2::SECOND_VALUE,
TestEnum2::MAX_ENTRIES);
}
// Compile tests for UMA_HISTOGRAM_ENUMERATION when the value type is:
// - a const reference to an enum
// - a non-const reference to an enum
TEST(HistogramMacro, EnumerationConstRef) {
enum class TestEnum { kValue, kMaxValue = kValue };
const TestEnum& value_ref = TestEnum::kValue;
UMA_HISTOGRAM_ENUMERATION("Test.ScopedEnumeration3", value_ref);
}
TEST(HistogramMacro, EnumerationNonConstRef) {
enum class TestEnum { kValue, kMaxValue = kValue };
TestEnum value = TestEnum::kValue;
TestEnum& value_ref = value;
UMA_HISTOGRAM_ENUMERATION("Test.ScopedEnumeration4", value_ref);
}
TEST(HistogramMacro, SplitByProcessPriorityMacro) {
TimeTicks mock_now = TimeTicks::Now();
constexpr TimeDelta kMockIntervalBetweenSamples = Seconds(1);
{
// No BestEffort suffix by default (SetSharedLastForegroundTimeForMetrics
// not invoked yet in this process).
HistogramTester tester;
UMA_HISTOGRAM_SPLIT_BY_PROCESS_PRIORITY(UMA_HISTOGRAM_COUNTS_1000, mock_now,
Microseconds(0), "Test.MyCount",
123);
tester.ExpectUniqueSample("Test.MyCount", 123, 1);
tester.ExpectUniqueSample("Test.MyCount.BestEffort", 123, 0);
}
mock_now += kMockIntervalBetweenSamples;
std::atomic<base::TimeTicks> shared_last_foreground_time = mock_now;
internal::SetSharedLastForegroundTimeForMetrics(&shared_last_foreground_time);
{
// No BestEffort suffix while foreground.
HistogramTester tester;
UMA_HISTOGRAM_SPLIT_BY_PROCESS_PRIORITY(UMA_HISTOGRAM_COUNTS_1000, mock_now,
Microseconds(0), "Test.MyCount",
123);
tester.ExpectUniqueSample("Test.MyCount", 123, 1);
tester.ExpectUniqueSample("Test.MyCount.BestEffort", 123, 0);
}
mock_now += kMockIntervalBetweenSamples;
shared_last_foreground_time.store(TimeTicks(), std::memory_order_relaxed);
{
// BestEffort suffix while in BestEffort.
HistogramTester tester;
UMA_HISTOGRAM_SPLIT_BY_PROCESS_PRIORITY(UMA_HISTOGRAM_COUNTS_1000, mock_now,
Microseconds(0), "Test.MyCount",
123);
tester.ExpectUniqueSample("Test.MyCount", 123, 0);
tester.ExpectUniqueSample("Test.MyCount.BestEffort", 123, 1);
}
mock_now += kMockIntervalBetweenSamples;
shared_last_foreground_time.store(mock_now, std::memory_order_relaxed);
{
// No BestEffort suffix once back to normal priority.
HistogramTester tester;
UMA_HISTOGRAM_SPLIT_BY_PROCESS_PRIORITY(UMA_HISTOGRAM_COUNTS_1000, mock_now,
Microseconds(0), "Test.MyCount",
123);
tester.ExpectUniqueSample("Test.MyCount", 123, 1);
tester.ExpectUniqueSample("Test.MyCount.BestEffort", 123, 0);
}
{
// BestEffort suffix while normal priority if the sample_interval overlaps
// into a BestEffort range.
HistogramTester tester;
UMA_HISTOGRAM_SPLIT_BY_PROCESS_PRIORITY(UMA_HISTOGRAM_COUNTS_1000, mock_now,
kMockIntervalBetweenSamples * 1.5,
"Test.MyCount", 123);
tester.ExpectUniqueSample("Test.MyCount", 123, 0);
tester.ExpectUniqueSample("Test.MyCount.BestEffort", 123, 1);
}
{
HistogramTester tester;
// ... and also if the sample was taken at a time before the last foreground
// time:
UMA_HISTOGRAM_SPLIT_BY_PROCESS_PRIORITY(
UMA_HISTOGRAM_COUNTS_1000, mock_now - kMockIntervalBetweenSamples * 1.5,
Microseconds(0), "Test.MyCount", 123);
tester.ExpectUniqueSample("Test.MyCount", 123, 0);
tester.ExpectUniqueSample("Test.MyCount.BestEffort", 123, 1);
}
// Reset the global state at the end of the test.
internal::SetSharedLastForegroundTimeForMetrics(nullptr);
{
// No BestEffort suffix by default, again.
HistogramTester tester;
UMA_HISTOGRAM_SPLIT_BY_PROCESS_PRIORITY(UMA_HISTOGRAM_COUNTS_1000, mock_now,
Microseconds(0), "Test.MyCount",
123);
tester.ExpectUniqueSample("Test.MyCount", 123, 1);
tester.ExpectUniqueSample("Test.MyCount.BestEffort", 123, 0);
}
}
TEST(HistogramMacro, TimerSubsamplingMacro) {
HistogramTester tester;
// Sampling the histogram should increase the total count.
{
SCOPED_UMA_HISTOGRAM_TIMER_MICROS_SUBSAMPLED("Test.SubsampledTimer", true);
}
tester.ExpectTotalCount("Test.SubsampledTimer", 1);
{
SCOPED_UMA_HISTOGRAM_TIMER_MICROS_SUBSAMPLED("Test.SubsampledTimer", false);
}
// Inversely, not sampling the histogram should not increase the total count.
tester.ExpectTotalCount("Test.SubsampledTimer", 1);
}
} // namespace base
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