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| author | Steven Rostedt <srostedt@redhat.com> | 2009-02-24 10:21:36 -0500 |
|---|---|---|
| committer | Steven Rostedt <srostedt@redhat.com> | 2009-02-24 21:54:05 -0500 |
| commit | b77e38aa240c3bd9c55c98b9f7c81541e042eae5 (patch) | |
| tree | bbb40993e76edc52d2cae1040b941ba4e4d2f965 /kernel/trace/Kconfig | |
| parent | 7c37730cd31ddb2d3a1da142af9b18c29b8c433b (diff) | |
| download | lwn-b77e38aa240c3bd9c55c98b9f7c81541e042eae5.tar.gz lwn-b77e38aa240c3bd9c55c98b9f7c81541e042eae5.zip | |
tracing: add event trace infrastructure
This patch creates the event tracing infrastructure of ftrace.
It will create the files:
/debug/tracing/available_events
/debug/tracing/set_event
The available_events will list the trace points that have been
registered with the event tracer.
set_events will allow the user to enable or disable an event hook.
example:
# echo sched_wakeup > /debug/tracing/set_event
Will enable the sched_wakeup event (if it is registered).
# echo "!sched_wakeup" >> /debug/tracing/set_event
Will disable the sched_wakeup event (and only that event).
# echo > /debug/tracing/set_event
Will disable all events (notice the '>')
# cat /debug/tracing/available_events > /debug/tracing/set_event
Will enable all registered event hooks.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Diffstat (limited to 'kernel/trace/Kconfig')
| -rw-r--r-- | kernel/trace/Kconfig | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig index 07877f4b5233..999c6a2485df 100644 --- a/kernel/trace/Kconfig +++ b/kernel/trace/Kconfig @@ -159,6 +159,15 @@ config CONTEXT_SWITCH_TRACER This tracer gets called from the context switch and records all switching of tasks. +config EVENT_TRACER + bool "Trace various events in the kernel" + depends on DEBUG_KERNEL + select TRACING + help + This tracer hooks to various trace points in the kernel + allowing the user to pick and choose which trace point they + want to trace. + config BOOT_TRACER bool "Trace boot initcalls" depends on DEBUG_KERNEL |