From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 12:05:51 +0200 Subject: Adding upstream version 5.10.209. Signed-off-by: Daniel Baumann --- Documentation/core-api/tracepoint.rst | 55 +++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 Documentation/core-api/tracepoint.rst (limited to 'Documentation/core-api/tracepoint.rst') diff --git a/Documentation/core-api/tracepoint.rst b/Documentation/core-api/tracepoint.rst new file mode 100644 index 000000000..6b44bec0d --- /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: -- cgit v1.2.3