X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=doc%2Fman%2Flttng-add-context.1.txt;h=8e5c2bf6403385024d1c884bf3fefd8a53bcb605;hb=dca9929532e7e1c85475ca6cb4a74b8e599cc55f;hp=ad83445b5c97ca45af5239271ead76742fff0d06;hpb=f5511eeafdb40b9589306519633566c3be48756c;p=lttng-tools.git

diff --git a/doc/man/lttng-add-context.1.txt b/doc/man/lttng-add-context.1.txt
index ad83445b5..8e5c2bf64 100644
--- a/doc/man/lttng-add-context.1.txt
+++ b/doc/man/lttng-add-context.1.txt
@@ -1,6 +1,6 @@
 lttng-add-context(1)
 ====================
-:revdate: 3 May 2021
+:revdate: 6 May 2021
 
 
 NAME
@@ -31,7 +31,7 @@ The `lttng add-context` command can:
 
 Without the option:--list option::
     Add one or more context fields to be recorded by LTTng to the event
-    records of a given channel, or of all the channels of:
+    records of:
 +
 With the option:--session='SESSION' option:::
     The tracing session named 'SESSION'.
@@ -40,16 +40,18 @@ Without the option:--session option:::
     The current tracing session (see man:lttng-concepts(7) to learn more
     about the current tracing session).
 
+With the option:--channel='CHANNEL':::
+    The channel named 'CHANNEL'.
+
+Without the option:--channel option:::
+    *All* the channels of the selected tracing session.
+
 With the option:--list option::
     List the available context field types.
 
 See man:lttng-concepts(7) to learn more about tracing sessions and
 channels.
 
-Without the option:--channel option, LTTng adds context fields to be
-recorded to the event records of *all* the channels of the selected
-tracing session.
-
 Repeat the option:--type='TYPE' option to add more than one context
 field to be recorded. 'TYPE' is one of:
 
@@ -89,6 +91,7 @@ The possible values for this part are processor-specific.
 
 * An LTTng application-specific context field name:
 +
+--
 [verse]
 $app.'PROVIDER':__TYPE__
 +
@@ -97,6 +100,9 @@ $app.'PROVIDER':__TYPE__
 
 'TYPE'::
     Context type name.
+--
++
+Only available with the option:--jul and option:--log4j options.
 
 IMPORTANT: Make sure to **single-quote** 'TYPE' when you run the
 `add-context` command from a shell, as `$` is a special character for
@@ -106,6 +112,8 @@ NOTE: As of LTTng{nbsp}{lttng_version}, you may :not: add context fields
 to be recorded to the event records of a given channel once its tracing
 session has been started (see man:lttng-start(1)) at least once.
 
+See the <<examples,EXAMPLES>> section below for usage examples.
+
 
 include::common-lttng-cmd-options-head.txt[]
 
@@ -164,6 +172,59 @@ include::common-lttng-cmd-help-options.txt[]
 include::common-lttng-cmd-after-options.txt[]
 
 
+[[examples]]
+EXAMPLES
+--------
+.List the available context field types.
+====
+See the option:--list option.
+
+[role="term"]
+----
+$ lttng add-context --list
+----
+====
+
+.Add a single statically-known context field to be recorded to all the Linux kernel channels of the current tracing session.
+====
+[role="term"]
+----
+$ lttng add-context --kernel --type=pid
+----
+====
+
+.Add three statically-known context fields to be recorded to a specific user space channel of a specific tracing session.
+====
+See the option:--session and option:--channel options.
+
+[role="term"]
+----
+$ lttng add-context --userspace --session=my-session \
+                    --channel=my-channel \
+                    --type=vpid --type=procname --type=ip
+----
+====
+
+.Add a perf counter context field to be recorded to a specific Linux kernel channel of the current tracing session.
+====
+See the option:--channel option.
+
+[role="term"]
+----
+$ lttng add-context --kernel --channel=my-channel \
+                    --type=perf:cpu:cache-misses
+----
+====
+
+.Add an LTTng application-specific context field to be recorded to all the JUL channels of the current tracing session.
+====
+[role="term"]
+----
+$ lttng add-context --jul --type='$app.my_server:user_cnt'
+----
+====
+
+
 include::common-footer.txt[]