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/*
* Copyright 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#undef LOG_TAG
#define LOG_TAG "LayerInfoTest"
#include <gtest/gtest.h>
#include "Fps.h"
#include "Scheduler/LayerHistory.h"
#include "Scheduler/LayerInfo.h"
namespace android::scheduler {
class LayerInfoTest : public testing::Test {
protected:
using FrameTimeData = LayerInfo::FrameTimeData;
void setFrameTimes(const std::deque<FrameTimeData>& frameTimes) {
layerInfo.mFrameTimes = frameTimes;
}
void setLastRefreshRate(Fps fps) {
layerInfo.mLastRefreshRate.reported = fps;
layerInfo.mLastRefreshRate.calculated = fps;
}
auto calculateAverageFrameTime() { return layerInfo.calculateAverageFrameTime(); }
LayerInfo layerInfo{"TestLayerInfo", 0, LayerHistory::LayerVoteType::Heuristic};
};
namespace {
TEST_F(LayerInfoTest, prefersPresentTime) {
std::deque<FrameTimeData> frameTimes;
constexpr auto kExpectedFps = Fps(50.0f);
constexpr auto kPeriod = kExpectedFps.getPeriodNsecs();
constexpr int kNumFrames = 10;
for (int i = 1; i <= kNumFrames; i++) {
frameTimes.push_back(FrameTimeData{.presentTime = kPeriod * i,
.queueTime = 0,
.pendingModeChange = false});
}
setFrameTimes(frameTimes);
const auto averageFrameTime = calculateAverageFrameTime();
ASSERT_TRUE(averageFrameTime.has_value());
const auto averageFps = Fps::fromPeriodNsecs(*averageFrameTime);
ASSERT_TRUE(kExpectedFps.equalsWithMargin(averageFps))
<< "Expected " << averageFps << " to be equal to " << kExpectedFps;
}
TEST_F(LayerInfoTest, fallbacksToQueueTimeIfNoPresentTime) {
std::deque<FrameTimeData> frameTimes;
constexpr auto kExpectedFps = Fps(50.0f);
constexpr auto kPeriod = kExpectedFps.getPeriodNsecs();
constexpr int kNumFrames = 10;
for (int i = 1; i <= kNumFrames; i++) {
frameTimes.push_back(FrameTimeData{.presentTime = 0,
.queueTime = kPeriod * i,
.pendingModeChange = false});
}
setFrameTimes(frameTimes);
setLastRefreshRate(Fps(20.0f)); // Set to some valid value
const auto averageFrameTime = calculateAverageFrameTime();
ASSERT_TRUE(averageFrameTime.has_value());
const auto averageFps = Fps::fromPeriodNsecs(*averageFrameTime);
ASSERT_TRUE(kExpectedFps.equalsWithMargin(averageFps))
<< "Expected " << averageFps << " to be equal to " << kExpectedFps;
}
TEST_F(LayerInfoTest, returnsNulloptIfThereWasConfigChange) {
std::deque<FrameTimeData> frameTimesWithoutConfigChange;
const auto period = Fps(50.0f).getPeriodNsecs();
constexpr int kNumFrames = 10;
for (int i = 1; i <= kNumFrames; i++) {
frameTimesWithoutConfigChange.push_back(FrameTimeData{.presentTime = period * i,
.queueTime = period * i,
.pendingModeChange = false});
}
setFrameTimes(frameTimesWithoutConfigChange);
ASSERT_TRUE(calculateAverageFrameTime().has_value());
{
// Config change in the first record
auto frameTimes = frameTimesWithoutConfigChange;
frameTimes[0].pendingModeChange = true;
setFrameTimes(frameTimes);
ASSERT_FALSE(calculateAverageFrameTime().has_value());
}
{
// Config change in the last record
auto frameTimes = frameTimesWithoutConfigChange;
frameTimes[frameTimes.size() - 1].pendingModeChange = true;
setFrameTimes(frameTimes);
ASSERT_FALSE(calculateAverageFrameTime().has_value());
}
{
// Config change in the middle
auto frameTimes = frameTimesWithoutConfigChange;
frameTimes[frameTimes.size() / 2].pendingModeChange = true;
setFrameTimes(frameTimes);
ASSERT_FALSE(calculateAverageFrameTime().has_value());
}
}
// A frame can be recorded twice with very close presentation or queue times.
// Make sure that this doesn't influence the calculated average FPS.
TEST_F(LayerInfoTest, ignoresSmallPeriods) {
std::deque<FrameTimeData> frameTimes;
constexpr auto kExpectedFps = Fps(50.0f);
constexpr auto kExpectedPeriod = kExpectedFps.getPeriodNsecs();
constexpr auto kSmallPeriod = Fps(250.0f).getPeriodNsecs();
constexpr int kNumIterations = 10;
for (int i = 1; i <= kNumIterations; i++) {
frameTimes.push_back(FrameTimeData{.presentTime = kExpectedPeriod * i,
.queueTime = 0,
.pendingModeChange = false});
// A duplicate frame
frameTimes.push_back(FrameTimeData{.presentTime = kExpectedPeriod * i + kSmallPeriod,
.queueTime = 0,
.pendingModeChange = false});
}
setFrameTimes(frameTimes);
const auto averageFrameTime = calculateAverageFrameTime();
ASSERT_TRUE(averageFrameTime.has_value());
const auto averageFps = Fps::fromPeriodNsecs(*averageFrameTime);
ASSERT_TRUE(kExpectedFps.equalsWithMargin(averageFps))
<< "Expected " << averageFps << " to be equal to " << kExpectedFps;
}
// There may be a big period of time between two frames. Make sure that
// this doesn't influence the calculated average FPS.
TEST_F(LayerInfoTest, ignoresLargePeriods) {
std::deque<FrameTimeData> frameTimes;
constexpr auto kExpectedFps = Fps(50.0f);
constexpr auto kExpectedPeriod = kExpectedFps.getPeriodNsecs();
constexpr auto kLargePeriod = Fps(9.0f).getPeriodNsecs();
auto record = [&](nsecs_t time) {
frameTimes.push_back(
FrameTimeData{.presentTime = time, .queueTime = 0, .pendingModeChange = false});
};
auto time = kExpectedPeriod; // Start with non-zero time.
record(time);
time += kLargePeriod;
record(time);
constexpr int kNumIterations = 10;
for (int i = 1; i <= kNumIterations; i++) {
time += kExpectedPeriod;
record(time);
}
setFrameTimes(frameTimes);
const auto averageFrameTime = calculateAverageFrameTime();
ASSERT_TRUE(averageFrameTime.has_value());
const auto averageFps = Fps::fromPeriodNsecs(*averageFrameTime);
ASSERT_TRUE(kExpectedFps.equalsWithMargin(averageFps))
<< "Expected " << averageFps << " to be equal to " << kExpectedFps;
}
} // namespace
} // namespace android::scheduler
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