babeltrace - Man Page

Babeltrace Trace Viewer and Converter


babeltrace [OPTIONS] FILE...


Babeltrace is a trace viewer and converter reading and writing the Common Trace Format (CTF). Its main use is to pretty-print CTF traces into a human-readable text output ordered by time.

This program follows the usual GNU command line syntax with long options starting with two dashes. Below is a summary of the available options.


Input trace FILE(s) or directory(ies)

-w, --output OUTPUT

Output trace path (default: stdout)

-i, --input-format FORMAT

Input trace format (default: ctf). CTF is currently the only supported input format.

-o, --output-format FORMAT

Output trace format (default: text)

-h, --help

This help message

-l, --list

List available formats

-v, --verbose

Verbose mode (or set BABELTRACE_VERBOSE environment variable)

-d, --debug

Debug mode (or set BABELTRACE_DEBUG environment variable)


Do not print time delta between consecutive events

-n, --names name1<,name2,...>

Print field names: (payload OR args OR arg), none, all, scope, header, (context OR ctx), (default: payload,context).

-f, --fields name1<,name2,...>

Print additional fields: all, trace, trace:hostname, trace:domain, trace:procname, trace:vpid, loglevel.


Disregard internal clock offset (use raw value)

--clock-offset seconds

Clock offset in seconds


Print the timestamps as [sec.ns] (default is: [hh:mm:ss.ns])


Print clock date


Print clock in GMT time zone (default: local time zone)


Only print events when all streams are active


Directory in which to look for debugging information files (default: /usr/lib/debug/)


Directory to use as a prefix for executable lookup


Show full debug info source and binary paths (if available)

Formats available: ctf, dummy, text.

Environment Variables

Note that all command line options will override environmenal variables.


Activate verbose Babeltrace output.


Activate debug Babeltrace output.

See Also

babeltrace-log(1), lttng(1), lttng-ust(3), lttng-sessiond(8)


The lttng-live plugin does not honor the the "--output" command line option.

If you encounter any issues or usability problem, please report it on our mailing list <> to help improve this project.


Babeltrace and the babeltrace library are distributed under the MIT license. See the files LICENSE and mit-license.txt for details.

A Web site is available at for more information on Babeltrace and the Common Trace Format. See for more information on the LTTng project.

Mailing list for support and development: <>.

You can find us on IRC server (OFTC) in #lttng.


Thanks to the Linux Foundation and Ericsson for funding part of this work. Thanks to the Multicore Association Tool Infrastructure Working Group for their active role in the creation of the Common Trace Format.


Babeltrace was originally written by Mathieu Desnoyers, with additional contributions from various other people. It is currently maintained by Mathieu Desnoyers <>.

Referenced By

babeltrace2(1), babeltrace2-convert(1), babeltrace2-intro(7), babeltrace2-plugin-text(7), babeltrace2-sink.text.pretty(7), babeltrace-log(1), lttng-crash(1), lttng-ust(3), lttng-view(1).

February 6, 2012