babeltrace2-query-babeltrace.trace-infos

Babeltrace 2's trace infos query object

Description

The babeltrace.trace-infos Babeltrace 2 query object indicates time range information about specific traces and their streams, and which output ports of an eventual source component will serve the messages for a given stream.

The babeltrace2-convert(1) command queries this object from all the source component classes to support the --stream-intersection feature.

Parameters

The parameters for this query operation are exactly the same as you would pass as the initialization parameters of a component created from the queried component class.

Result Object

The result object is an array of trace info maps (see “Trace info map”).

Trace info map

A trace info map contains:

stream-infos=STREAM-INFOS [array of stream info maps]

Stream info maps (see “Stream info map”) for this trace.

Stream info map

A stream info map contains:

range-ns=RANGE [range map]

The time range of this stream, a map containing:

begin=NS [signed integer]

Beginning time of this stream (nanoseconds since the stream class’s default clock class’s origin).

end=NS [signed integer]

End time of this stream (nanoseconds since the stream class’s default clock class’s origin).

port-name=PORT-NAME [string]

For an eventual source component initialized with the same parameters: name of the output port which serves the messages of this stream.

Examples

Result object

Example 1. Two trace infos: one with three stream infos, one with two stream infos.

- stream-infos:
  - range-ns:
      begin: 1509556764975082000
      end: 1509557102181554400
    port-name: trace0-cpu0
  - range-ns:
      begin: 1509556764947050800
      end: 1509557102182771000
    port-name: trace0-cpu1
  - range-ns:
      begin: 1509556764956409300
      end: 1509557102182770400
    port-name: trace0-cpu2
- stream-infos:
  - range-ns:
      begin: 1509556764918082000
      end: 1509557103849928400
    port-name: trace1-cpu0
  - range-ns:
      begin: 1509556761888820000
      end: 1509557109928100400
    port-name: trace1-cpu1

Bugs

If you encounter any issue or usability problem, please report it on the Babeltrace bug tracker (see <https://bugs.lttng.org/projects/babeltrace>).

Resources

The Babeltrace project shares some communication channels with the LTTng project (see <https://lttng.org/>).

Babeltrace website (see <https://babeltrace.org/>)
Mailing list (see <https://lists.lttng.org>) for support and development: lttng-dev@lists.lttng.org
IRC channel (see <irc://irc.oftc.net/lttng>): #lttng on irc.oftc.net
Bug tracker (see <https://bugs.lttng.org/projects/babeltrace>)
Git repository (see <https://git.efficios.com/?p=babeltrace.git>)
GitHub project (see <https://github.com/efficios/babeltrace>)
Continuous integration (see <https://ci.lttng.org/view/Babeltrace/>)
Code review (see <https://review.lttng.org/q/project:babeltrace>)