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authorJonathan Corbet <corbet@lwn.net>2016-11-19 03:21:32 +0300
committerJonathan Corbet <corbet@lwn.net>2016-11-30 00:44:23 +0300
commitd6ba7a9c8b5a6a42e8f7a7efd8345122611b535c (patch)
tree1f7cb969d644c15d58f43a024be5c8eb609ab4c7 /Documentation/core-api
parent8da3dc53347205b0d32ded4ab9c96dcf336061d8 (diff)
downloadlinux-d6ba7a9c8b5a6a42e8f7a7efd8345122611b535c.tar.xz
doc: Sphinxify the tracepoint docbook
Convert the tracepoint docbook template to RST and add it to the core-api manual. No changes to the actual text beyond the mechanical formatting conversion. Cc: Jason Baron <jbaron@redhat.com> Cc: William Cohen <wcohen@redhat.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'Documentation/core-api')
-rw-r--r--Documentation/core-api/index.rst3
-rw-r--r--Documentation/core-api/tracepoint.rst55
2 files changed, 57 insertions, 1 deletions
diff --git a/Documentation/core-api/index.rst b/Documentation/core-api/index.rst
index c3a1402da0cd..91b3a010817a 100644
--- a/Documentation/core-api/index.rst
+++ b/Documentation/core-api/index.rst
@@ -19,7 +19,8 @@ Interfaces for kernel debugging
.. toctree::
:maxdepth: 1
- debug-objects
+ debug-objects
+ tracepoint
.. only:: subproject
diff --git a/Documentation/core-api/tracepoint.rst b/Documentation/core-api/tracepoint.rst
new file mode 100644
index 000000000000..6b44bec0de43
--- /dev/null
+++ b/Documentation/core-api/tracepoint.rst
@@ -0,0 +1,55 @@
+===============================
+The Linux Kernel Tracepoint API
+===============================
+
+:Author: Jason Baron
+:Author: William Cohen
+
+Introduction
+============
+
+Tracepoints are static probe points that are located in strategic points
+throughout the kernel. 'Probes' register/unregister with tracepoints via
+a callback mechanism. The 'probes' are strictly typed functions that are
+passed a unique set of parameters defined by each tracepoint.
+
+From this simple callback mechanism, 'probes' can be used to profile,
+debug, and understand kernel behavior. There are a number of tools that
+provide a framework for using 'probes'. These tools include Systemtap,
+ftrace, and LTTng.
+
+Tracepoints are defined in a number of header files via various macros.
+Thus, the purpose of this document is to provide a clear accounting of
+the available tracepoints. The intention is to understand not only what
+tracepoints are available but also to understand where future
+tracepoints might be added.
+
+The API presented has functions of the form:
+``trace_tracepointname(function parameters)``. These are the tracepoints
+callbacks that are found throughout the code. Registering and
+unregistering probes with these callback sites is covered in the
+``Documentation/trace/*`` directory.
+
+IRQ
+===
+
+.. kernel-doc:: include/trace/events/irq.h
+ :internal:
+
+SIGNAL
+======
+
+.. kernel-doc:: include/trace/events/signal.h
+ :internal:
+
+Block IO
+========
+
+.. kernel-doc:: include/trace/events/block.h
+ :internal:
+
+Workqueue
+=========
+
+.. kernel-doc:: include/trace/events/workqueue.h
+ :internal: