diff options
Diffstat (limited to 'Documentation/trace')
-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. | |||
22 | --------------------------------- | 22 | --------------------------------- |
23 | 23 | ||
24 | The events which are available for tracing can be found in the file | 24 | The 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 | ||
27 | To enable a particular event, such as 'sched_wakeup', simply echo it | 27 | To enable a particular event, such as 'sched_wakeup', simply echo it |
28 | to /debug/tracing/set_event. For example: | 28 | to /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: | |||
35 | To disable an event, echo the event name to the set_event file prefixed | 35 | To disable an event, echo the event name to the set_event file prefixed |
36 | with an exclamation point: | 36 | with 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 | ||
40 | To disable all events, echo an empty line to the set_event file: | 40 | To 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 | ||
44 | To enable all events, echo '*:*' or '*:' to the set_event file: | 44 | To 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 | ||
48 | The events are organized into subsystems, such as ext4, irq, sched, | 48 | The events are organized into subsystems, such as ext4, irq, sched, |
49 | etc., and a full event name looks like this: <subsystem>:<event>. The | 49 | 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 | |||
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 |
53 | command: | 53 | command: |
54 | 54 | ||
55 | # echo 'irq:*' > /debug/tracing/set_event | 55 | # echo 'irq:*' > /sys/kernel/debug/tracing/set_event |
56 | 56 | ||
57 | 2.2 Via the 'enable' toggle | 57 | 2.2 Via the 'enable' toggle |
58 | --------------------------- | 58 | --------------------------- |
59 | 59 | ||
60 | The events available are also listed in /debug/tracing/events/ hierarchy | 60 | The events available are also listed in /sys/kernel/debug/tracing/events/ hierarchy |
61 | of directories. | 61 | of directories. |
62 | 62 | ||
63 | To enable event 'sched_wakeup': | 63 | To 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 | ||
67 | To disable it: | 67 | To 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 | ||
71 | To enable all events in sched subsystem: | 71 | To 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 | ||
75 | To eanble all events: | 75 | To eanble all events: |
76 | 76 | ||
77 | # echo 1 > /debug/tracing/events/enable | 77 | # echo 1 > /sys/kernel/debug/tracing/events/enable |
78 | 78 | ||
79 | When reading one of these enable files, there are four results: | 79 | When reading one of these enable files, there are four results: |
80 | 80 | ||