lttng-disable-channel(1)

1LTTNG-DISABLE-CHAN(1)            LTTng Manual            LTTNG-DISABLE-CHAN(1)
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NAME

6       lttng-disable-channel - Disable LTTng channels
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SYNOPSIS

9       lttng [GENERAL OPTIONS] disable-channel (--kernel | --userspace)
10             [--session=SESSION] CHANNEL[,CHANNEL]...
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DESCRIPTION

13       The lttng disable-channel command disables one or more channels
14       previously enabled by the lttng-enable-channel(1) command.
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16       A channel is always contained in a tracing session (see lttng-create(1)
17       for creating a tracing session). The session in which a channel is
18       disabled using lttng disable-channel can be specified using the
19       --session option. If the --session option is omitted, the current
20       tracing session is targeted.
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22       Note that re-enabling a disabled channel once its tracing session has
23       been active at least once is currently not supported.
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OPTIONS

26       General options are described in lttng(1).
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28   Domain
29       One of:
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31       -k, --kernel
32           Disable channel in the Linux kernel domain.
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34       -u, --userspace
35           Disable channel in the user space domain.
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37   Target
38       -s SESSION, --session=SESSION
39           Disable channels in the tracing session named SESSION instead of
40           the current tracing session.
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42   Program information
43       -h, --help
44           Show command help.
45
46           This option, like lttng-help(1), attempts to launch /usr/bin/man to
47           view the command’s man page. The path to the man pager can be
48           overridden by the LTTNG_MAN_BIN_PATH environment variable.
49
50       --list-options
51           List available command options.
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ENVIRONMENT VARIABLES

54       LTTNG_ABORT_ON_ERROR
55           Set to 1 to abort the process after the first error is encountered.
56
57       LTTNG_HOME
58           Overrides the $HOME environment variable. Useful when the user
59           running the commands has a non-writable home directory.
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61       LTTNG_MAN_BIN_PATH
62           Absolute path to the man pager to use for viewing help information
63           about LTTng commands (using lttng-help(1) or lttng COMMAND --help).
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65       LTTNG_SESSION_CONFIG_XSD_PATH
66           Path in which the session.xsd session configuration XML schema may
67           be found.
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69       LTTNG_SESSIOND_PATH
70           Full session daemon binary path.
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72           The --sessiond-path option has precedence over this environment
73           variable.
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75       Note that the lttng-create(1) command can spawn an LTTng session daemon
76       automatically if none is running. See lttng-sessiond(8) for the
77       environment variables influencing the execution of the session daemon.
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FILES

80       $LTTNG_HOME/.lttngrc
81           User LTTng runtime configuration.
82
83           This is where the per-user current tracing session is stored
84           between executions of lttng(1). The current tracing session can be
85           set with lttng-set-session(1). See lttng-create(1) for more
86           information about tracing sessions.
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88       $LTTNG_HOME/lttng-traces
89           Default output directory of LTTng traces. This can be overridden
90           with the --output option of the lttng-create(1) command.
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92       $LTTNG_HOME/.lttng
93           User LTTng runtime and configuration directory.
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95       $LTTNG_HOME/.lttng/sessions
96           Default location of saved user tracing sessions (see lttng-save(1)
97           and lttng-load(1)).
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99       /usr/local/etc/lttng/sessions
100           System-wide location of saved tracing sessions (see lttng-save(1)
101           and lttng-load(1)).
102
103           Note
104           $LTTNG_HOME defaults to $HOME when not explicitly set.
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EXIT STATUS

107       0
108           Success
109
110       1
111           Command error
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113       2
114           Undefined command
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116       3
117           Fatal error
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119       4
120           Command warning (something went wrong during the command)
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BUGS

123       If you encounter any issue or usability problem, please report it on
124       the LTTng bug tracker <https://bugs.lttng.org/projects/lttng-tools>.
125

RESOURCES

127       •   LTTng project website <https://lttng.org>
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129       •   LTTng documentation <https://lttng.org/docs>
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131       •   Git repositories <http://git.lttng.org>
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133       •   GitHub organization <http://github.com/lttng>
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135       •   Continuous integration <http://ci.lttng.org/>
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137       •   Mailing list <http://lists.lttng.org> for support and development:
138           lttng-dev@lists.lttng.org
139
140       •   IRC channel <irc://irc.oftc.net/lttng>: #lttng on irc.oftc.net
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COPYRIGHTS

143       This program is part of the LTTng-tools project.
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145       LTTng-tools is distributed under the GNU General Public License version
146       2 <http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html>. See the
147       LICENSE <https://github.com/lttng/lttng-tools/blob/master/LICENSE> file
148       for details.
149

THANKS

151       Special thanks to Michel Dagenais and the DORSAL laboratory
152       <http://www.dorsal.polymtl.ca/> at École Polytechnique de Montréal for
153       the LTTng journey.
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155       Also thanks to the Ericsson teams working on tracing which helped us
156       greatly with detailed bug reports and unusual test cases.
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