Statsd Checkpoint Atoms

Tracing

This diagram gives the atoms and the state transitions between when tracing/ All atoms above log the UUID of the trace; PERFETTO_TRACED_TRIGGER_STOP_TRACING is special as it also logs the trigger name which caused trace finalization.

NOTE: dotted lines indicate these transitions only happen in background configs; transitions with solid lines happen in both background and non-background cases.

NOTE: for background traces, either start triggers or stop triggers are supported; both cannot happen for the same trace.

PERFETTO_CMD_ON_CONNECT; PERFETTO_CMD_ON_CONNECT PERFETTO_TRACED_ENABLE_TRACING PERFETTO_TRACED_START_TRACING |start trigger background traces only|PERFETTO_TRACED_TRIGGER_START_TRACING PERFETTO_TRACED_START_TRACING |stop trigger background traces only|PERFETTO_TRACED_TRIGGER_STOP_TRACING PERFETTO_TRACED_DISABLE_TRACING PERFETTO_TRACED_DISABLE_TRACING PERFETTO_TRACED_NOTIFY_TRACING_DISABLED PERFETTO_CMD_ON_TRACING_DISABLED PERFETTO_CMD_FINALIZE_TRACE_AND_EXIT PERFETTO_CMD_UPLOAD_INCIDENT |only if no trigger happened|PERFETTO_CMD_NOT_UPLOADING_EMPTY_TRACE

Triggers

This diagram gives the atoms which can trigger finalization of a trace. These atoms will not be reported individually but instead aggregated by trigger name and reported as a count.

PERFETTO_CMD_TRIGGER PERFETTO_TRIGGER_PERFETTO_TRIGGER