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Diffstat (limited to 'Documentation/core-api')
| -rw-r--r-- | Documentation/core-api/index.rst | 3 | ||||
| -rw-r--r-- | Documentation/core-api/tracepoint.rst | 55 |
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: |