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samples/trace_events/trace-events-sample.c
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#include <linux/module.h> #include <linux/kthread.h> /* * Any file that uses trace points, must include the header. * But only one file, must include the header by defining * CREATE_TRACE_POINTS first. This will make the C code that * creates the handles for the trace points. */ #define CREATE_TRACE_POINTS #include "trace-events-sample.h" static void simple_thread_func(int cnt) { set_current_state(TASK_INTERRUPTIBLE); schedule_timeout(HZ); trace_foo_bar("hello", cnt); |
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} static int simple_thread(void *arg) { int cnt = 0; while (!kthread_should_stop()) simple_thread_func(cnt++); return 0; } static struct task_struct *simple_tsk; static int __init trace_event_init(void) { simple_tsk = kthread_run(simple_thread, NULL, "event-sample"); if (IS_ERR(simple_tsk)) return -1; return 0; } static void __exit trace_event_exit(void) { kthread_stop(simple_tsk); } module_init(trace_event_init); module_exit(trace_event_exit); MODULE_AUTHOR("Steven Rostedt"); MODULE_DESCRIPTION("trace-events-sample"); MODULE_LICENSE("GPL"); |