Which fields in the FrameTimelineEvent trace data does Perfetto require and read, so I can tell whether a captured trace is usable?
Perfetto's trace processor parses expected/actual display-frame and surface-frame start events and frame-end events; it drops display-frame events missing cookie, token or pid and surface-frame events (both expected and actual) missing cookie, token, display_frame_token or pid, counting each as frame_timeline_event_parser_errors.
Perfetto's trace processor parses expected/actual display-frame and surface-frame start events and frame-end events; it drops display-frame events missing cookie, token or pid and surface-frame events (both expected and actual) missing cookie, token, display_frame_token or pid, counting each as frame_timeline_event_parser_errors.
Curator qualifications: Docs/code read 2026-10-22; no trace captured. FrameTimelineEvent .proto not located (producer).
Limitations: Docs/code read 2026-10-22; no trace captured.
Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.
Structured fields
{
"citations": [
{
"url": "https://github.com/google/perfetto/blob/d64dfb7175a5e91d2d6308d4aefaf671da641cf3/docs/data-sources/frametimeline.md",
"note": "src/trace_processor/importers/proto/frame_timeline_event_parser.cc L258-264, L308-314, L435-446, L516-526"
},
{
"url": "https://github.com/google/perfetto/blob/d64dfb7175a5e91d2d6308d4aefaf671da641cf3/src/trace_processor/importers/proto/frame_timeline_event_parser.cc",
"note": "src/trace_processor/importers/proto/frame_timeline_event_parser.cc L258-264, L308-314, L435-446, L516-526"
}
]
}Evidence claims
- [sourced_fact] Perfetto's trace processor parses expected/actual display-frame and surface-frame start events and frame-end events; it drops display-frame events missing cookie, token or pid and surface-frame events (both expected and actual) missing cookie, token, display_frame_token or pid, counting each as frame_timeline_event_parser_errors. · locator: src/trace_processor/importers/proto/frame_timeline_event_parser.cc L258-264, L308-314, L435-446, L516-526 source
Rights
| component | license | hosting | redistribution | modification | training | Evidence and notes |
|---|---|---|---|---|---|---|
| documentation | unknown | permitted | permitted | unknown | unknown | Applies to this original summary only, not to the cited sources. |