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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <string>
#include <vector>
#include "base/files/file.h"
#include "base/files/file_util.h"
#include "base/files/scoped_temp_dir.h"
#include "base/time/time.h"
#include "chrome/browser/ash/power/cpu_data_collector.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace ash {
namespace {
// The suffix path of fake CPU frequency file for cpu0.
constexpr char kTimeInStateSuffixPathCpu0[] = "cpu0/time_in_state";
// The suffix path of fake CPU frequency file for cpu1.
constexpr char kTimeInStateSuffixPathCpu1[] = "cpu1/time_in_state";
// The suffix path of fake CPU frequency file for all cpus.
constexpr char kAllTimeInStateSuffixPath[] = "all_time_in_state";
// The string content of the fake CPU frequency file for cpu0.
constexpr char kTimeInStateContentCpu0[] =
"20000 30000000\n"
"60000 90000\n"
"100000 50000\n";
// The string content of the fake CPU frequency file for cpu1.
constexpr char kTimeInStateContentCpu1[] =
"20000 31000000\n"
"60000 91000\n"
"100000 51000\n";
// The string content of the fake CPU frequency file for all CPUs.
constexpr char kAllTimeInStateContent[] =
"freq\t\tcpu0\t\tcpu1\t\t\n"
"20000\t\t30000000\t\t31000000\t\t\n"
"60000\t\t90000\t\t91000\t\t\n"
"100000\t\t50000\t\t51000\t\t\n";
// The string content of the fake CPU frequency file for all CPUs except one
// that reports "N/A" as the CPU/freq combinations that are invalid.
constexpr char kAllTimeInStateContentNA[] =
"freq\t\tcpu0\t\tcpu1\t\tcpu2\t\t\n"
"20000\t\t30000000\t\t31000000\t\tN/A\t\t\n"
"60000\t\t90000\t\t91000\t\tN/A\t\t\n"
"100000\t\t50000\t\t51000\t\tN/A\t\t\n";
// The string content of the fake CPU frequency file for all CPUs except one
// that does not report freq as the CPU is turned off.
constexpr char kAllTimeInStateContentOff[] =
"freq\t\tcpu0\t\tcpu1\t\tcpu2\t\t\n"
"20000\t\t30000000\t\t31000000\t\t\n"
"60000\t\t90000\t\t91000\t\t\n"
"100000\t\t50000\t\t51000\t\t\n";
} // namespace
class CpuDataCollectorTest : public testing::Test {
public:
CpuDataCollectorTest()
: kExpectedCpuFreqStateNames({"20", "60", "100"}),
kExpectedTimeInStateCpu0({base::Milliseconds(300000000),
base::Milliseconds(900000),
base::Milliseconds(500000)}),
kExpectedTimeInStateCpu1({base::Milliseconds(310000000),
base::Milliseconds(910000),
base::Milliseconds(510000)}) {}
CpuDataCollectorTest(const CpuDataCollectorTest&) = delete;
CpuDataCollectorTest& operator=(const CpuDataCollectorTest&) = delete;
// testing::Test:
void SetUp() override {
ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
time_in_state_path_cpu0_ =
temp_dir_.GetPath().AppendASCII(kTimeInStateSuffixPathCpu0);
time_in_state_path_cpu1_ =
temp_dir_.GetPath().AppendASCII(kTimeInStateSuffixPathCpu1);
all_time_in_state_path_ =
temp_dir_.GetPath().AppendASCII(kAllTimeInStateSuffixPath);
}
protected:
// Expected CPU frequency state names after calling |ReadCpuFreqTimeInState|
// or |ReadCpuFreqAllTimeInState|
const std::vector<std::string> kExpectedCpuFreqStateNames;
// Expected time_in_state of sample for cpu0.
const std::vector<base::TimeDelta> kExpectedTimeInStateCpu0;
// Expected time_in_state of sample for cpu1.
const std::vector<base::TimeDelta> kExpectedTimeInStateCpu1;
base::ScopedTempDir temp_dir_;
base::FilePath time_in_state_path_cpu0_;
base::FilePath time_in_state_path_cpu1_;
base::FilePath all_time_in_state_path_;
};
TEST_F(CpuDataCollectorTest, ReadCpuFreqTimeInState) {
ASSERT_TRUE(base::CreateTemporaryFile(&time_in_state_path_cpu0_));
ASSERT_TRUE(base::CreateTemporaryFile(&time_in_state_path_cpu1_));
ASSERT_TRUE(
base::WriteFile(time_in_state_path_cpu0_, kTimeInStateContentCpu0));
ASSERT_TRUE(
base::WriteFile(time_in_state_path_cpu1_, kTimeInStateContentCpu1));
std::vector<std::string> cpu_freq_state_names;
CpuDataCollector::StateOccupancySample freq_sample_cpu0;
CpuDataCollector::StateOccupancySample freq_sample_cpu1;
CpuDataCollector::ReadCpuFreqTimeInState(
time_in_state_path_cpu0_, &cpu_freq_state_names, &freq_sample_cpu0);
EXPECT_EQ(kExpectedCpuFreqStateNames, cpu_freq_state_names);
EXPECT_EQ(kExpectedTimeInStateCpu0, freq_sample_cpu0.time_in_state);
cpu_freq_state_names.clear();
CpuDataCollector::ReadCpuFreqTimeInState(
time_in_state_path_cpu1_, &cpu_freq_state_names, &freq_sample_cpu1);
EXPECT_EQ(kExpectedCpuFreqStateNames, cpu_freq_state_names);
EXPECT_EQ(kExpectedTimeInStateCpu1, freq_sample_cpu1.time_in_state);
}
TEST_F(CpuDataCollectorTest, ReadCpuFreqAllTimeInState) {
ASSERT_TRUE(base::CreateTemporaryFile(&all_time_in_state_path_));
ASSERT_TRUE(base::WriteFile(all_time_in_state_path_, kAllTimeInStateContent));
std::vector<std::string> cpu_freq_state_names;
std::vector<CpuDataCollector::StateOccupancySample> freq_samples;
CpuDataCollector::StateOccupancySample freq_sample_cpu0;
CpuDataCollector::StateOccupancySample freq_sample_cpu1;
// |ReadCpuFreqAllTimeInState| only collects samples for CPUs that are online.
freq_sample_cpu0.cpu_online = true;
freq_sample_cpu1.cpu_online = true;
freq_samples.push_back(freq_sample_cpu0);
freq_samples.push_back(freq_sample_cpu1);
CpuDataCollector::ReadCpuFreqAllTimeInState(
2, all_time_in_state_path_, &cpu_freq_state_names, &freq_samples);
EXPECT_EQ(kExpectedCpuFreqStateNames, cpu_freq_state_names);
EXPECT_EQ(kExpectedTimeInStateCpu0, freq_samples[0].time_in_state);
EXPECT_EQ(kExpectedTimeInStateCpu1, freq_samples[1].time_in_state);
}
TEST_F(CpuDataCollectorTest, ReadCpuFreqAllTimeInStateNA) {
ASSERT_TRUE(base::CreateTemporaryFile(&all_time_in_state_path_));
ASSERT_TRUE(
base::WriteFile(all_time_in_state_path_, kAllTimeInStateContentNA));
std::vector<std::string> cpu_freq_state_names;
std::vector<CpuDataCollector::StateOccupancySample> freq_samples;
CpuDataCollector::StateOccupancySample freq_sample_cpu0;
CpuDataCollector::StateOccupancySample freq_sample_cpu1;
CpuDataCollector::StateOccupancySample freq_sample_cpu2;
// |ReadCpuFreqAllTimeInState| only collects samples for CPUs that are online.
freq_sample_cpu0.cpu_online = true;
freq_sample_cpu1.cpu_online = true;
freq_sample_cpu2.cpu_online = true;
freq_samples.push_back(freq_sample_cpu0);
freq_samples.push_back(freq_sample_cpu1);
freq_samples.push_back(freq_sample_cpu2);
CpuDataCollector::ReadCpuFreqAllTimeInState(
3, all_time_in_state_path_, &cpu_freq_state_names, &freq_samples);
EXPECT_EQ(kExpectedCpuFreqStateNames, cpu_freq_state_names);
EXPECT_EQ(kExpectedTimeInStateCpu0, freq_samples[0].time_in_state);
EXPECT_EQ(kExpectedTimeInStateCpu1, freq_samples[1].time_in_state);
EXPECT_TRUE(freq_samples[2].time_in_state.empty());
}
TEST_F(CpuDataCollectorTest, ReadCpuFreqAllTimeInStateOff) {
ASSERT_TRUE(base::CreateTemporaryFile(&all_time_in_state_path_));
ASSERT_TRUE(
base::WriteFile(all_time_in_state_path_, kAllTimeInStateContentOff));
std::vector<std::string> cpu_freq_state_names;
std::vector<CpuDataCollector::StateOccupancySample> freq_samples;
CpuDataCollector::StateOccupancySample freq_sample_cpu0;
CpuDataCollector::StateOccupancySample freq_sample_cpu1;
CpuDataCollector::StateOccupancySample freq_sample_cpu2;
// |ReadCpuFreqAllTimeInState| only collects samples for CPUs that are online.
freq_sample_cpu0.cpu_online = true;
freq_sample_cpu1.cpu_online = true;
freq_sample_cpu2.cpu_online = false;
freq_samples.push_back(freq_sample_cpu0);
freq_samples.push_back(freq_sample_cpu1);
freq_samples.push_back(freq_sample_cpu2);
CpuDataCollector::ReadCpuFreqAllTimeInState(
2, all_time_in_state_path_, &cpu_freq_state_names, &freq_samples);
EXPECT_EQ(kExpectedCpuFreqStateNames, cpu_freq_state_names);
EXPECT_EQ(kExpectedTimeInStateCpu0, freq_samples[0].time_in_state);
EXPECT_EQ(kExpectedTimeInStateCpu1, freq_samples[1].time_in_state);
EXPECT_TRUE(freq_samples[2].time_in_state.empty());
}
} // namespace ash
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