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NAME | DESCRIPTION | INITIALIZATION PARAMETERS | PORTS | QUERY OBJECTS | ENVIRONMENT VARIABLES | BUGS | RESOURCES | AUTHORS | COPYRIGHT | SEE ALSO | COLOPHON |
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BABELTRACE-SOURCE(7) Babeltrace manual BABELTRACE-SOURCE(7)
babeltrace-source.text.dmesg - Babeltrace's Linux kernel ring buffer
source component class
The Babeltrace source.text.dmesg component class, provided by the
babeltrace-plugin-text(7) plugin, once instantiated, reads the lines
of a Linux kernel ring buffer, as printed by the dmesg(1) tool, and
emits corresponding event notifications on its output port.
The events created by a source.text.dmesg component are named string
and contain a single payload string field named str which contains
the corresponding ring buffer line.
By default, a source.text.dmesg component reads the lines of the
standard input stream. You can make the component read the lines of a
text file instead with the path parameter.
By default, the component tries to extract the timestamps of the
kernel ring buffer lines and use them as the created events’s
timestamps. A typical dmesg(1) line looks like this:
[87166.510937] PM: Finishing wakeup.
In the last example, the [87166.510937] part is the timestamp to
extract. You can make the component not extract timestamps from lines
with the no-extract-timestamp parameter.
The following parameters are optional.
no-extract-timestamp=yes (boolean)
Do NOT extract timestamps from the kernel ring buffer lines: set
the created event’s payload’s str field to the whole line,
including any timestamp prefix.
path=PATH (string)
Read the kernel ring buffer lines from the file PATH instead of
the standard input stream.
Output
out
Single output port to which the component sends the created
notifications.
This component class has no objects to query.
BABELTRACE_COMMON_LOG_LEVEL
Common functions’s log level. The available values are the same
as for the --log-level option of babeltrace(1).
BABELTRACE_COMPAT_LOG_LEVEL
Compatibility functions’s log level. The available values are the
same as for the --log-level option of babeltrace(1).
BABELTRACE_TERM_COLOR
Force the terminal color support. The available values are:
AUTO
Only emit terminal color codes when the standard output and
error streams are connected to a color-capable terminal.
NEVER
Never emit terminal color codes.
ALWAYS
Always emit terminal color codes.
If you encounter any issue or usability problem, please report it on
the Babeltrace bug tracker (see
<https://bugs.linuxfoundation.org/buglist.cgi?product=Diamon&component=Babeltrace>).
The Babeltrace project shares some communication channels with the
LTTng project (see <http://lttng.org/>).
· Babeltrace website (see <http://diamon.org/babeltrace>)
· Git repository (see
<http://git.linuxfoundation.org/?p=diamon/babeltrace.git>)
· EfficiOS GitHub organization (see <http://github.com/efficios/>)
· Continuous integration (see
<https://ci.lttng.org/job/babeltrace_master_build/>)
· Mailing list (see <http://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
The Babeltrace project is the result of efforts by many regular
developers and occasional contributors.
The current project maintainer is Jérémie Galarneau
<mailto:jeremie.galarneau@efficios.com>.
This component class is part of the Babeltrace project.
Babeltrace is distributed under the MIT license (see
<https://opensource.org/licenses/MIT>).
babeltrace-plugin-text(7), babeltrace-intro(7)
This page is part of the babeltrace (trace read and write libraries
and a trace converter) project. Information about the project can be
found at ⟨http://www.efficios.com/babeltrace⟩. If you have a bug
report for this manual page, send it to lttng-dev@lists.lttng.org.
This page was obtained from the project's upstream Git repository
⟨git://git.efficios.com/babeltrace.git⟩ on 2018-02-02. (At that
time, the date of the most recent commit that was found in the repos‐
itory was 2018-01-30.) If you discover any rendering problems in
this HTML version of the page, or you believe there is a better or
more up-to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not part
of the original manual page), send a mail to man-pages@man7.org
Babeltrace 2.0.0-pre4 5 October 2017 BABELTRACE-SOURCE(7)
Pages that refer to this page: babeltrace(1), babeltrace-log(1), babeltrace-plugin-text(7)
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