diff options
Diffstat (limited to 'Documentation/trace/events.txt')
| -rw-r--r-- | Documentation/trace/events.txt | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/Documentation/trace/events.txt b/Documentation/trace/events.txt index 6e5f35ebb9c..78c45a87be5 100644 --- a/Documentation/trace/events.txt +++ b/Documentation/trace/events.txt @@ -22,12 +22,12 @@ tracing information should be printed. --------------------------------- The events which are available for tracing can be found in the file -/debug/tracing/available_events. +/sys/kernel/debug/tracing/available_events. To enable a particular event, such as 'sched_wakeup', simply echo it -to /debug/tracing/set_event. For example: +to /sys/kernel/debug/tracing/set_event. For example: - # echo sched_wakeup >> /debug/tracing/set_event + # echo sched_wakeup >> /sys/kernel/debug/tracing/set_event [ Note: '>>' is necessary, otherwise it will firstly disable all the events. ] @@ -35,15 +35,15 @@ to /debug/tracing/set_event. For example: To disable an event, echo the event name to the set_event file prefixed with an exclamation point: - # echo '!sched_wakeup' >> /debug/tracing/set_event + # echo '!sched_wakeup' >> /sys/kernel/debug/tracing/set_event To disable all events, echo an empty line to the set_event file: - # echo > /debug/tracing/set_event + # echo > /sys/kernel/debug/tracing/set_event To enable all events, echo '*:*' or '*:' to the set_event file: - # echo *:* > /debug/tracing/set_event + # echo *:* > /sys/kernel/debug/tracing/set_event The events are organized into subsystems, such as ext4, irq, sched, etc., and a full event name looks like this: <subsystem>:<event>. The @@ -52,29 +52,29 @@ file. All of the events in a subsystem can be specified via the syntax "<subsystem>:*"; for example, to enable all irq events, you can use the command: - # echo 'irq:*' > /debug/tracing/set_event + # echo 'irq:*' > /sys/kernel/debug/tracing/set_event 2.2 Via the 'enable' toggle --------------------------- -The events available are also listed in /debug/tracing/events/ hierarchy +The events available are also listed in /sys/kernel/debug/tracing/events/ hierarchy of directories. To enable event 'sched_wakeup': - # echo 1 > /debug/tracing/events/sched/sched_wakeup/enable + # echo 1 > /sys/kernel/debug/tracing/events/sched/sched_wakeup/enable To disable it: - # echo 0 > /debug/tracing/events/sched/sched_wakeup/enable + # echo 0 > /sys/kernel/debug/tracing/events/sched/sched_wakeup/enable To enable all events in sched subsystem: - # echo 1 > /debug/tracing/events/sched/enable + # echo 1 > /sys/kernel/debug/tracing/events/sched/enable To eanble all events: - # echo 1 > /debug/tracing/events/enable + # echo 1 > /sys/kernel/debug/tracing/events/enable When reading one of these enable files, there are four results: |