diff options
Diffstat (limited to 'samples/trace_events/trace-events-sample.c')
-rw-r--r-- | samples/trace_events/trace-events-sample.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/samples/trace_events/trace-events-sample.c b/samples/trace_events/trace-events-sample.c new file mode 100644 index 000000000000..aabc4e970911 --- /dev/null +++ b/samples/trace_events/trace-events-sample.c | |||
@@ -0,0 +1,52 @@ | |||
1 | #include <linux/module.h> | ||
2 | #include <linux/kthread.h> | ||
3 | |||
4 | /* | ||
5 | * Any file that uses trace points, must include the header. | ||
6 | * But only one file, must include the header by defining | ||
7 | * CREATE_TRACE_POINTS first. This will make the C code that | ||
8 | * creates the handles for the trace points. | ||
9 | */ | ||
10 | #define CREATE_TRACE_POINTS | ||
11 | #include "trace-events-sample.h" | ||
12 | |||
13 | |||
14 | static void simple_thread_func(int cnt) | ||
15 | { | ||
16 | set_current_state(TASK_INTERRUPTIBLE); | ||
17 | schedule_timeout(HZ); | ||
18 | trace_foo_bar("hello", cnt); | ||
19 | } | ||
20 | |||
21 | static int simple_thread(void *arg) | ||
22 | { | ||
23 | int cnt = 0; | ||
24 | |||
25 | while (!kthread_should_stop()) | ||
26 | simple_thread_func(cnt++); | ||
27 | |||
28 | return 0; | ||
29 | } | ||
30 | |||
31 | static struct task_struct *simple_tsk; | ||
32 | |||
33 | static int __init trace_event_init(void) | ||
34 | { | ||
35 | simple_tsk = kthread_run(simple_thread, NULL, "event-sample"); | ||
36 | if (IS_ERR(simple_tsk)) | ||
37 | return -1; | ||
38 | |||
39 | return 0; | ||
40 | } | ||
41 | |||
42 | static void __exit trace_event_exit(void) | ||
43 | { | ||
44 | kthread_stop(simple_tsk); | ||
45 | } | ||
46 | |||
47 | module_init(trace_event_init); | ||
48 | module_exit(trace_event_exit); | ||
49 | |||
50 | MODULE_AUTHOR("Steven Rostedt"); | ||
51 | MODULE_DESCRIPTION("trace-events-sample"); | ||
52 | MODULE_LICENSE("GPL"); | ||