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Reland "fix duration event of timeline summary (#47742)" (#47889)

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This reverts commit 50d421224d.
This commit is contained in:
Francisco Magdaleno 2019-12-27 11:15:48 -08:00 committed by GitHub
parent 50d421224d
commit bc0d35c34e
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 78 additions and 54 deletions
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47
packages/flutter_driver/lib/src/driver/timeline_summary.dart
View File

@ -57,27 +57,27 @@ class TimelineSummary {
///
/// Returns null if no frames were recorded.
double computeAverageFrameRasterizerTimeMillis() {
return _averageInMillis(_extractDuration(_extractGpuRasterizerDrawEvents()));
return _averageInMillis(_extractGpuRasterizerDrawDurations());
}
/// The longest frame rasterization time in milliseconds.
///
/// Returns null if no frames were recorded.
double computeWorstFrameRasterizerTimeMillis() {
return _maxInMillis(_extractDuration(_extractGpuRasterizerDrawEvents()));
return _maxInMillis(_extractGpuRasterizerDrawDurations());
}
/// The [p]-th percentile frame rasterization time in milliseconds.
///
/// Returns null if no frames were recorded.
double computePercentileFrameRasterizerTimeMillis(double p) {
return _percentileInMillis(_extractDuration(_extractGpuRasterizerDrawEvents()), p);
return _percentileInMillis(_extractGpuRasterizerDrawDurations(), p);
}
/// The number of frames that missed the [kBuildBudget] on the GPU and
/// therefore are in the danger of missing frames.
int computeMissedFrameRasterizerBudgetCount([ Duration frameBuildBudget = kBuildBudget ]) => _extractGpuRasterizerDrawEvents()
.where((TimedEvent event) => event.duration > kBuildBudget)
int computeMissedFrameRasterizerBudgetCount([ Duration frameBuildBudget = kBuildBudget ]) => _extractGpuRasterizerDrawDurations()
.where((Duration duration) => duration > kBuildBudget)
.length;
/// The total number of frames recorded in the timeline.
@ -100,8 +100,8 @@ class TimelineSummary {
'frame_build_times': _extractFrameDurations()
.map<int>((Duration duration) => duration.inMicroseconds)
.toList(),
'frame_rasterizer_times': _extractGpuRasterizerDrawEvents()
.map<int>((TimedEvent event) => event.duration.inMicroseconds)
'frame_rasterizer_times': _extractGpuRasterizerDrawDurations()
.map<int>((Duration duration) => duration.inMicroseconds)
.toList(),
};
}
@ -142,15 +142,11 @@ class TimelineSummary {
.toList();
}
List<Duration> _extractDurations(String name) {
return _extractNamedEvents(name).map<Duration>((TimelineEvent event) => event.duration).toList();
}
/// Extracts timed events that are reported as a pair of begin/end events.
/// Extracts Duration list that are reported as a pair of begin/end events.
///
/// See: https://docs.google.com/document/d/1CvAClvFfyA5R-PhYUmn5OOQtYMH4h6I0nSsKchNAySU
List<TimedEvent> _extractBeginEndEvents(String name) {
final List<TimedEvent> result = <TimedEvent>[];
List<Duration> _extractBeginEndEvents(String name) {
final List<Duration> result = <Duration>[];
// Timeline does not guarantee that the first event is the "begin" event.
final Iterator<TimelineEvent> events = _extractNamedEvents(name)
@ -159,10 +155,7 @@ class TimelineSummary {
final TimelineEvent beginEvent = events.current;
if (events.moveNext()) {
final TimelineEvent endEvent = events.current;
result.add(TimedEvent(
beginEvent.timestampMicros,
endEvent.timestampMicros,
));
result.add(Duration(microseconds: endEvent.timestampMicros - beginEvent.timestampMicros));
}
}
@ -194,21 +187,7 @@ class TimelineSummary {
.reduce(math.max);
}
List<TimedEvent> _extractGpuRasterizerDrawEvents() => _extractBeginEndEvents('GPURasterizer::Draw');
List<Duration> _extractGpuRasterizerDrawDurations() => _extractBeginEndEvents('GPURasterizer::Draw');
List<Duration> _extractFrameDurations() => _extractDurations('Frame');
Iterable<Duration> _extractDuration(Iterable<TimedEvent> events) {
return events.map<Duration>((TimedEvent e) => e.duration);
}
}
/// Timing information about an event that happened in the event loop.
class TimedEvent {
/// Creates a timed event given begin and end timestamps in microseconds.
TimedEvent(int beginTimeMicros, int endTimeMicros)
: duration = Duration(microseconds: endTimeMicros - beginTimeMicros);
/// The duration of the event.
final Duration duration;
List<Duration> _extractFrameDurations() => _extractBeginEndEvents('Frame');
}

85
packages/flutter_driver/test/src/timeline_summary_test.dart
View File

@ -20,11 +20,16 @@ void main() {
}));
}
Map<String, dynamic> build(int timeStamp, int duration) => <String, dynamic>{
Map<String, dynamic> frameBegin(int timeStamp) => <String, dynamic>{
'name': 'Frame',
'ph': 'X',
'ph': 'B',
'ts': timeStamp,
};
Map<String, dynamic> frameEnd(int timeStamp) => <String, dynamic>{
'name': 'Frame',
'ph': 'E',
'ts': timeStamp,
'dur': duration,
};
Map<String, dynamic> begin(int timeStamp) => <String, dynamic>{
@ -54,8 +59,8 @@ void main() {
test('counts frames', () {
expect(
summarize(<Map<String, dynamic>>[
build(1000, 1000),
build(3000, 2000),
frameBegin(1000), frameEnd(2000),
frameBegin(3000), frameEnd(5000),
]).countFrames(),
2,
);
@ -73,12 +78,32 @@ void main() {
test('computes average frame build time in milliseconds', () {
expect(
summarize(<Map<String, dynamic>>[
build(1000, 1000),
build(3000, 2000),
frameBegin(1000), frameEnd(2000),
frameBegin(3000), frameEnd(5000),
]).computeAverageFrameBuildTimeMillis(),
1.5,
);
});
test('skips leading "end" events', () {
expect(
summarize(<Map<String, dynamic>>[
frameEnd(1000),
frameBegin(2000), frameEnd(4000),
]).computeAverageFrameBuildTimeMillis(),
2.0,
);
});
test('skips trailing "begin" events', () {
expect(
summarize(<Map<String, dynamic>>[
frameBegin(2000), frameEnd(4000),
frameBegin(5000),
]).computeAverageFrameBuildTimeMillis(),
2.0,
);
});
});
group('worst_frame_build_time_millis', () {
@ -92,15 +117,35 @@ void main() {
test('computes worst frame build time in milliseconds', () {
expect(
summarize(<Map<String, dynamic>>[
build(1000, 1000),
build(3000, 2000),
frameBegin(1000), frameEnd(2000),
frameBegin(3000), frameEnd(5000),
]).computeWorstFrameBuildTimeMillis(),
2.0,
);
expect(
summarize(<Map<String, dynamic>>[
build(3000, 2000),
build(1000, 1000),
frameBegin(3000), frameEnd(5000),
frameBegin(1000), frameEnd(2000),
]).computeWorstFrameBuildTimeMillis(),
2.0,
);
});
test('skips leading "end" events', () {
expect(
summarize(<Map<String, dynamic>>[
frameEnd(1000),
frameBegin(2000), frameEnd(4000),
]).computeWorstFrameBuildTimeMillis(),
2.0,
);
});
test('skips trailing "begin" events', () {
expect(
summarize(<Map<String, dynamic>>[
frameBegin(2000), frameEnd(4000),
frameBegin(5000),
]).computeWorstFrameBuildTimeMillis(),
2.0,
);
@ -110,9 +155,9 @@ void main() {
group('computeMissedFrameBuildBudgetCount', () {
test('computes the number of missed build budgets', () {
final TimelineSummary summary = summarize(<Map<String, dynamic>>[
build(1000, 17000),
build(19000, 9000),
build(29000, 18000),
frameBegin(1000), frameEnd(18000),
frameBegin(19000), frameEnd(28000),
frameBegin(29000), frameEnd(47000),
]);
expect(summary.countFrames(), 3);
@ -267,9 +312,9 @@ void main() {
begin(1000), end(19000),
begin(19000), end(29000),
begin(29000), end(49000),
build(1000, 17000),
build(19000, 9000),
build(29000, 19000),
frameBegin(1000), frameEnd(18000),
frameBegin(19000), frameEnd(28000),
frameBegin(29000), frameEnd(48000),
]).summaryJson,
<String, dynamic>{
'average_frame_build_time_millis': 15.0,
@ -317,9 +362,9 @@ void main() {
begin(1000), end(19000),
begin(19000), end(29000),
begin(29000), end(49000),
build(1000, 17000),
build(19000, 9000),
build(29000, 19000),
frameBegin(1000), frameEnd(18000),
frameBegin(19000), frameEnd(28000),
frameBegin(29000), frameEnd(48000),
]).writeSummaryToFile('test', destinationDirectory: tempDir.path);
final String written =
await fs.file(path.join(tempDir.path, 'test.timeline_summary.json')).readAsString();