king
/
v811_spc009
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
Branches Tags
${ item.name }
Create tag ${ searchTerm }
Create branch ${ searchTerm }
from 'b394c2d4e7'
${ noResults }
v811_spc009/external/perfetto/docs/reference/checkpoint-atoms.md

1.9 KiB
Raw Blame History

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.

graph TD;
    PERFETTO_CMD_TRACE_BEGIN-->PERFETTO_CMD_ON_CONNECT;
    PERFETTO_CMD_BACKGROUND_TRACE_BEGIN-.->PERFETTO_CMD_ON_CONNECT
    PERFETTO_CMD_ON_CONNECT-->PERFETTO_TRACED_ENABLE_TRACING
    PERFETTO_TRACED_ENABLE_TRACING-->PERFETTO_TRACED_START_TRACING
    PERFETTO_TRACED_ENABLE_TRACING-.->|start trigger background traces only|PERFETTO_TRACED_TRIGGER_START_TRACING
    PERFETTO_TRACED_TRIGGER_START_TRACING-.->PERFETTO_TRACED_START_TRACING
    PERFETTO_TRACED_START_TRACING-.->|stop trigger background traces only|PERFETTO_TRACED_TRIGGER_STOP_TRACING
    PERFETTO_TRACED_TRIGGER_STOP_TRACING-.->PERFETTO_TRACED_DISABLE_TRACING
    PERFETTO_TRACED_START_TRACING-->PERFETTO_TRACED_DISABLE_TRACING
    PERFETTO_TRACED_DISABLE_TRACING-->PERFETTO_TRACED_NOTIFY_TRACING_DISABLED
    PERFETTO_TRACED_NOTIFY_TRACING_DISABLED-->PERFETTO_CMD_ON_TRACING_DISABLED
    PERFETTO_CMD_ON_TRACING_DISABLED-->PERFETTO_CMD_FINALIZE_TRACE_AND_EXIT
    PERFETTO_CMD_FINALIZE_TRACE_AND_EXIT-->PERFETTO_CMD_UPLOAD_INCIDENT
    PERFETTO_CMD_FINALIZE_TRACE_AND_EXIT-.->|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.

graph TD;
    PERFETTO_CMD_TRIGGER
    PERFETTO_TRIGGER_PERFETTO_TRIGGER