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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/system_cpu/core_times.h"
#include <vector>
#include "testing/gtest/include/gtest/gtest.h"
namespace system_cpu {
using CoreTimesTest = testing::Test;
TEST_F(CoreTimesTest, TimeUtilizationBalanced) {
CoreTimes baseline({105, 205, 305, 405, 505, 605, 705, 805, 905, 1005});
std::vector<CoreTimes> test_cases = {
// Individual components get summed up correctly.
CoreTimes({115, 205, 305, 415, 505, 605, 705, 805, 905, 1005}),
CoreTimes({105, 215, 305, 415, 505, 605, 705, 805, 905, 1005}),
CoreTimes({105, 205, 315, 415, 505, 605, 705, 805, 905, 1005}),
CoreTimes({105, 205, 305, 415, 505, 615, 705, 805, 905, 1005}),
CoreTimes({105, 205, 305, 415, 505, 605, 715, 805, 905, 1005}),
CoreTimes({105, 205, 305, 415, 505, 605, 705, 815, 905, 1005}),
// Ignored components are not added to the sum.
CoreTimes({115, 205, 305, 415, 595, 605, 705, 805, 905, 1005}),
CoreTimes({115, 205, 305, 415, 505, 605, 705, 805, 995, 1005}),
CoreTimes({115, 205, 305, 415, 505, 605, 705, 805, 905, 1095}),
// Negative changes in ignored components are not flagged.
CoreTimes({115, 205, 305, 415, 500, 605, 705, 805, 905, 1005}),
CoreTimes({115, 205, 305, 415, 505, 605, 705, 805, 900, 1005}),
CoreTimes({115, 205, 305, 415, 505, 605, 705, 805, 905, 1000}),
};
for (const CoreTimes& times : test_cases) {
SCOPED_TRACE(times.times_.data());
EXPECT_EQ(0.5, times.TimeUtilization(baseline));
}
}
TEST_F(CoreTimesTest, TimeUtilizationEmptyRange) {
CoreTimes baseline({105, 205, 305, 405, 505, 605, 705, 805, 905, 1005});
std::vector<CoreTimes> test_cases = {
// Identical times.
CoreTimes({105, 205, 305, 405, 505, 605, 705, 805, 905, 1005}),
// Changes in ignored components.
CoreTimes({105, 205, 305, 405, 515, 605, 705, 805, 905, 1005}),
CoreTimes({105, 205, 305, 405, 505, 605, 705, 805, 915, 1005}),
CoreTimes({105, 205, 305, 405, 505, 605, 705, 805, 905, 1015}),
};
for (const CoreTimes& times : test_cases) {
SCOPED_TRACE(times.times_.data());
EXPECT_EQ(-1, times.TimeUtilization(baseline));
}
}
TEST_F(CoreTimesTest, TimeUtilizationNegativeRange) {
CoreTimes baseline({105, 205, 305, 405, 505, 605, 705, 805, 905, 1005});
std::vector<CoreTimes> test_cases = {
CoreTimes({100, 205, 305, 415, 505, 605, 705, 805, 905, 1005}),
CoreTimes({105, 200, 305, 415, 505, 605, 705, 805, 905, 1005}),
CoreTimes({105, 205, 300, 415, 505, 605, 705, 805, 905, 1005}),
CoreTimes({115, 205, 305, 400, 505, 605, 705, 805, 905, 1005}),
CoreTimes({105, 205, 305, 415, 505, 600, 705, 805, 905, 1005}),
CoreTimes({105, 205, 305, 415, 505, 605, 700, 805, 905, 1005}),
CoreTimes({105, 205, 305, 415, 505, 605, 705, 800, 905, 1005}),
};
for (const CoreTimes& times : test_cases) {
SCOPED_TRACE(times.times_.data());
EXPECT_EQ(-1, times.TimeUtilization(baseline));
}
}
TEST_F(CoreTimesTest, TimeUtilizationComputation) {
CoreTimes baseline({105, 205, 305, 405, 505, 605, 705, 805, 905, 1005});
struct TestCase {
CoreTimes times;
double utilization;
};
std::vector<TestCase> test_cases = {
// No idling.
{CoreTimes({115, 205, 305, 405, 505, 605, 705, 805, 905, 1005}), 1.0},
{CoreTimes({115, 215, 305, 405, 505, 605, 705, 805, 905, 1005}), 1.0},
{CoreTimes({115, 215, 315, 405, 505, 605, 705, 805, 905, 1005}), 1.0},
{CoreTimes({115, 215, 315, 405, 505, 615, 705, 805, 905, 1005}), 1.0},
{CoreTimes({115, 215, 315, 405, 505, 615, 715, 805, 905, 1005}), 1.0},
{CoreTimes({115, 215, 315, 405, 505, 615, 715, 815, 905, 1005}), 1.0},
// All idling.
{CoreTimes({105, 205, 305, 415, 505, 605, 705, 805, 905, 1005}), 0.0},
// Fractions
{CoreTimes({115, 225, 305, 415, 505, 605, 705, 805, 905, 1005}), 0.75},
{CoreTimes({115, 225, 345, 415, 505, 605, 705, 805, 905, 1005}), 0.875},
{CoreTimes({115, 205, 305, 435, 505, 605, 705, 805, 905, 1005}), 0.25},
{CoreTimes({115, 205, 305, 475, 505, 605, 705, 805, 905, 1005}), 0.125},
};
for (const TestCase& test_case : test_cases) {
SCOPED_TRACE(test_case.times.times_.data());
EXPECT_EQ(test_case.utilization, test_case.times.TimeUtilization(baseline));
}
}
} // namespace system_cpu
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