man: update disable-event section

[lttng-tools.git] / doc / man / lttng.1

diff --git a/doc/man/lttng.1 b/doc/man/lttng.1
index 25e16d934af1de8489903f791c01f799f53695c1..db5a7c9255a5df045e22796b2d3779e65962cf82 100644 (file)
--- a/doc/man/lttng.1
+++ b/doc/man/lttng.1
@@ -590,11 +590,7 @@ Dynamic function entry/return probe. Addr and offset can be octal
 (0NNN...), decimal (NNN...) or hexadecimal (0xNNN...)
 .TP
 .BR "\-\-syscall"
-System call event. Enabling syscalls tracing (kernel tracer), you will
-not be able to disable them with disable-event. This is a known
-limitation. You can disable the entire channel to do the trick. Also note
-that per-syscall selection is not supported yet. Use with "-a" to enable
-all syscalls.
+System call event.
 .TP
 .BR "\-\-filter 'expression'"
 Set a filter on a newly enabled event. Filter expression on event
@@ -681,7 +677,7 @@ Apply for the user-space tracer
 .PP
 
 .PP
-\fBdisable-event\fP NAME[,NAME2,...] (\-k | \-u) [OPTIONS]
+\fBdisable-event\fP NAME[,NAME2,...] (\-k | \-u | \-j | \-l | \-p) [TYPE] [OPTIONS]
 .RS
 Disable tracing event
 
@@ -711,8 +707,8 @@ Apply on session name
 Apply on channel name
 .TP
 .BR "\-a, \-\-all-events"
-Disable all events. This does NOT disable "*" but rather every known
-events of the session.
+Disable all events. This does NOT ONLY disable "*" but rather every known
+events of the session
 .TP
 .BR "\-k, \-\-kernel"
 Apply for the kernel tracer
@@ -727,7 +723,26 @@ Apply for Java application using Java Util Logging interface (JUL)
 Apply for Java application using LOG4J
 .TP
 .BR "\-p, \-\-python"
-Apply for Python application using the logging module.
+Apply for Python application using the logging module
+
+.TP
+.B TYPE (kernel domain only):
+
+.TP
+.BR "\-\-all"
+Disable event of all type
+.TP
+.BR "\-\-tracepoint"
+Disable event of type tracepoint
+.TP
+.BR "\-\-syscall"
+Disable event of type syscall
+.TP
+.BR "\-\-probe"
+Disable event of type probe
+.TP
+.BR "\-\-function"
+Disable event of type function
 .RE
 .PP
 
@@ -1088,6 +1103,82 @@ Simple listing of options
 .RE
 .PP
 
+.PP
+\fBuntrack\fP (-k | -u) --pid [PID1[,PID2[,...]]] [OPTIONS]
+.RS
+Removes one or more entries from a tracker
+
+See the \fBtrack\fP command's documentation to learn more about LTTng
+trackers.
+
+The \fBuntrack\fP command removes specific resources from a tracker. The
+resources to remove must have been precedently added by the
+\fBtrack\fP command. It is also possible to remove all the resources
+from the whitelist using the \fB\-\-all\fR option.
+
+As of this version, the only available tracker is the \fBPID tracker\fP.
+
+One common operation is to create a tracing session, remove all the entries
+from the PID tracker whitelist, start tracing, and then manually track PIDs
+while tracing is active.
+
+Assume the maximum PID is 7 for the following examples:
+
+.nf
+    $ lttng create
+
+    Initial whitelist: [0] [1] [2] [3] [4] [5] [6] [7]
+
+    $ lttng untrack --userspace --pid --all
+
+            Whitelist: [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ]
+
+    $ lttng enable-event --userspace ...
+    $ lttng start
+    ...
+    $ lttng track --userspace --pid 3,5
+
+            Whitelist: [ ] [ ] [ ] [3] [ ] [5] [ ] [ ]
+
+    $ lttng track --userspace --pid 2
+
+            Whitelist: [ ] [ ] [2] [3] [ ] [5] [ ] [ ]
+.fi
+
+See the \fBtrack\fR command's documentation for more details about
+adding entries.
+
+.B OPTIONS:
+
+.TP
+.BR "\-s, \-\-session NAME"
+Apply to session name.
+.TP
+.BR "\-k, \-\-kernel"
+Apply to the kernel tracer.
+.TP
+.BR "\-u, \-\-userspace"
+Apply to the user space tracer.
+.TP
+.BR "\-p, \-\-pid [PIDS]"
+Stop tracking process IDs PIDS (remove from whitelist).
+
+PIDS is a comma-separated list of PIDs to remove from the PID tracker.
+
+The PIDS argument must be omitted when also using the \fB\-\-all\fP option.
+.TP
+.BR "\-a, \-\-all"
+Used in conjunction with an empty \fB\-\-pid\fP option: stop tracking all
+process IDs (remove all entries from whitelist).
+.TP
+.BR "\-h, \-\-help"
+Show summary of possible options and commands.
+.TP
+.BR "\-\-list-options"
+Simple listing of options
+.RE
+.PP
+
 .PP
 \fBversion\fP
 .RS