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Fix flaky complex_layout_scroll_perf__memory test (#150287)

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Initial tap is missing sometimes; either its never delivered or it is delivered before gesture controller is hooked up.

1: Update the two perf tests to output when TAPPED is received
2: Update the MemoryTest to keep tapping while waiting for TAPPED

Tested on devicelab:
* setting iterations=1
* removing the timeout before READY
* running tests in a while loop

Before this change, you could get the test to hang often. After this change you'll see "tapping device... [x]" where x is the counter.

Fixes #150096
This commit is contained in:
John McDole 2024-06-14 17:55:05 -07:00 committed by GitHub
parent 1c77696615
commit 499c84cbf8
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GPG Key ID: B5690EEEBB952194
3 changed files with 35 additions and 10 deletions
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10
dev/benchmarks/complex_layout/test_memory/scroll_perf.dart
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@ -23,7 +23,7 @@ Future<void> main() async {
final Completer<void> ready = Completer<void>();
runApp(GestureDetector(
onTap: () {
debugPrint('Received tap.');
debugPrint('==== MEMORY BENCHMARK ==== TAPPED ====');
ready.complete();
},
behavior: HitTestBehavior.opaque,
@ -32,16 +32,14 @@ Future<void> main() async {
),
));
await SchedulerBinding.instance.endOfFrame;
/// Wait 50ms to allow the raster thread to actually put up the frame. (The
/// endOfFrame future ends when we send the data to the engine, before
/// the raster thread has had a chance to rasterize, etc.)
await Future<void>.delayed(const Duration(milliseconds: 50));
debugPrint('==== MEMORY BENCHMARK ==== READY ====');
await ready.future; // waits for tap sent by devicelab task
debugPrint('Continuing...');
// Wait out any errant taps due to synchronization
await Future<void>.delayed(const Duration(milliseconds: 200));
// remove onTap handler, enable pointer events for app
runApp(GestureDetector(
child: const IgnorePointer(

29
dev/devicelab/lib/tasks/perf_tests.dart
View File

@ -2071,9 +2071,34 @@ class MemoryTest {
await launchApp();
await recordStart();
// Keep "tapping" the device till it responds with the string we expect,
// or throw an error instead of tying up the infrastructure for 30 minutes.
prepareForNextMessage('TAPPED');
bool tapped = false;
int tapCount = 0;
await Future.any(<Future<void>>[
() async {
while (true) {
if (tapped) {
break;
}
tapCount += 1;
print('tapping device... [$tapCount]');
await device!.tap(100, 100);
await Future<void>.delayed(const Duration(milliseconds: 100));
}
}(),
() async {
print('awaiting "tapped" message... (timeout: 10 seconds)');
try {
await receivedNextMessage?.timeout(const Duration(seconds: 10));
} finally {
tapped = true;
}
}(),
]);
prepareForNextMessage('DONE');
print('tapping device...');
await device!.tap(100, 100);
print('awaiting "done" message...');
await receivedNextMessage;

6
dev/integration_tests/flutter_gallery/test_memory/memory_nav.dart
View File

@ -26,7 +26,7 @@ Future<void> main() async {
final Completer<void> ready = Completer<void>();
runApp(GestureDetector(
onTap: () {
debugPrint('Received tap.');
debugPrint('==== MEMORY BENCHMARK ==== TAPPED ====');
ready.complete();
},
behavior: HitTestBehavior.opaque,
@ -35,12 +35,14 @@ Future<void> main() async {
),
));
await SchedulerBinding.instance.endOfFrame;
await Future<void>.delayed(const Duration(milliseconds: 50));
debugPrint('==== MEMORY BENCHMARK ==== READY ====');
await ready.future;
debugPrint('Continuing...');
// Wait out any errant taps due to synchronization
await Future<void>.delayed(const Duration(milliseconds: 200));
// remove onTap handler, enable pointer events for app
runApp(GestureDetector(
child: const IgnorePointer(