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-rw-r--r--Documentation/trace/events.txt24
1 files changed, 12 insertions, 12 deletions
diff --git a/Documentation/trace/events.txt b/Documentation/trace/events.txt
index 6e5f35ebb9c1..78c45a87be57 100644
--- a/Documentation/trace/events.txt
+++ b/Documentation/trace/events.txt
@@ -22,12 +22,12 @@ tracing information should be printed.
22--------------------------------- 22---------------------------------
23 23
24The events which are available for tracing can be found in the file 24The events which are available for tracing can be found in the file
25/debug/tracing/available_events. 25/sys/kernel/debug/tracing/available_events.
26 26
27To enable a particular event, such as 'sched_wakeup', simply echo it 27To enable a particular event, such as 'sched_wakeup', simply echo it
28to /debug/tracing/set_event. For example: 28to /sys/kernel/debug/tracing/set_event. For example:
29 29
30 # echo sched_wakeup >> /debug/tracing/set_event 30 # echo sched_wakeup >> /sys/kernel/debug/tracing/set_event
31 31
32[ Note: '>>' is necessary, otherwise it will firstly disable 32[ Note: '>>' is necessary, otherwise it will firstly disable
33 all the events. ] 33 all the events. ]
@@ -35,15 +35,15 @@ to /debug/tracing/set_event. For example:
35To disable an event, echo the event name to the set_event file prefixed 35To disable an event, echo the event name to the set_event file prefixed
36with an exclamation point: 36with an exclamation point:
37 37
38 # echo '!sched_wakeup' >> /debug/tracing/set_event 38 # echo '!sched_wakeup' >> /sys/kernel/debug/tracing/set_event
39 39
40To disable all events, echo an empty line to the set_event file: 40To disable all events, echo an empty line to the set_event file:
41 41
42 # echo > /debug/tracing/set_event 42 # echo > /sys/kernel/debug/tracing/set_event
43 43
44To enable all events, echo '*:*' or '*:' to the set_event file: 44To enable all events, echo '*:*' or '*:' to the set_event file:
45 45
46 # echo *:* > /debug/tracing/set_event 46 # echo *:* > /sys/kernel/debug/tracing/set_event
47 47
48The events are organized into subsystems, such as ext4, irq, sched, 48The events are organized into subsystems, such as ext4, irq, sched,
49etc., and a full event name looks like this: <subsystem>:<event>. The 49etc., 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
52"<subsystem>:*"; for example, to enable all irq events, you can use the 52"<subsystem>:*"; for example, to enable all irq events, you can use the
53command: 53command:
54 54
55 # echo 'irq:*' > /debug/tracing/set_event 55 # echo 'irq:*' > /sys/kernel/debug/tracing/set_event
56 56
572.2 Via the 'enable' toggle 572.2 Via the 'enable' toggle
58--------------------------- 58---------------------------
59 59
60The events available are also listed in /debug/tracing/events/ hierarchy 60The events available are also listed in /sys/kernel/debug/tracing/events/ hierarchy
61of directories. 61of directories.
62 62
63To enable event 'sched_wakeup': 63To enable event 'sched_wakeup':
64 64
65 # echo 1 > /debug/tracing/events/sched/sched_wakeup/enable 65 # echo 1 > /sys/kernel/debug/tracing/events/sched/sched_wakeup/enable
66 66
67To disable it: 67To disable it:
68 68
69 # echo 0 > /debug/tracing/events/sched/sched_wakeup/enable 69 # echo 0 > /sys/kernel/debug/tracing/events/sched/sched_wakeup/enable
70 70
71To enable all events in sched subsystem: 71To enable all events in sched subsystem:
72 72
73 # echo 1 > /debug/tracing/events/sched/enable 73 # echo 1 > /sys/kernel/debug/tracing/events/sched/enable
74 74
75To eanble all events: 75To eanble all events:
76 76
77 # echo 1 > /debug/tracing/events/enable 77 # echo 1 > /sys/kernel/debug/tracing/events/enable
78 78
79When reading one of these enable files, there are four results: 79When reading one of these enable files, there are four results:
80 80