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[VM/Timeline] Add Microtask stream

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TEST=runtime/vm/dart_api_impl_test.cc

Change-Id: Icb078489f3600ac0fb8b314ca3bf748f482a687e
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/422860
Reviewed-by: Ben Konyi <bkonyi@google.com>
This commit is contained in:
Derek Xu
2025-04-22 07:42:27 -07:00
committed by Commit Queue
parent cdab11ca77
commit 75311aefa8
13 changed files with 22 additions and 14 deletions
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runtime/docs/timeline.md
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@@ -33,6 +33,7 @@ Streams, also called categories, are sets of events whose recordering can be ena
| `Embedder` | Events created by `Dart_RecordTimelineEvent`. |
| `GC` | Events related to garbage collection or heap iteration. |
| `Isolate` | Isolate or isolate group lifecycle events such as startup or shutdown. |
| `Microtask` | Events representing `dart:async` microtasks. This stream only contains events when the VM is started with the `--profile-microtasks` flag. |
| `VM` | VM lifecycle events such a startup or shutdown. |
The set of enabled streams can be selected with the `timeline_streams` flag. E.g., `--timeline_stream=VM,Isolate,GC,Dart` or `--timeline_streams=All`.
@@ -45,7 +46,7 @@ There are also some convenience flags:
| Flag | Expansion |
| ---- | --------- |
|`--timeline_streams=All` | `--timeline_streams=API,Compiler,CompilerVerbose,Dart,Debugger,Embedder,GC,Isolate,VM` |
|`--timeline_streams=All` | `--timeline_streams=API,Compiler,CompilerVerbose,Dart,Debugger,Embedder,GC,Isolate,Microtask,VM` |
| `--complete_timeline` | `--timeline_recorder=endless --timeline_streams=All` |
| `--startup_timeline` | `--timeline_recorder=startup --timeline_streams=All` |