tracing.bconf

 1ftrace {
 2	tracer = function_graph;
 3	options = event-fork, sym-addr, stacktrace;
 4	buffer_size = 1M;
 5	alloc_snapshot;
 6	trace_clock = global;
 7	events = "task:task_newtask", "initcall:*";
 8	event.sched.sched_process_exec {
 9		filter = "pid < 128";
10	}
11	instance.bar {
12		event.kprobes {
13			myevent {
14				probes = "vfs_read $arg2 $arg3";
15			}
16			myevent2 {
17				probes = "vfs_write $arg2 +0($arg2):ustring $arg3";
18			}
19			myevent3 {
20				probes = "initrd_load";
21			}
22			enable
23		}
24	}
25	instance.foo {
26		tracer = function;
27		tracing_on = false;
28	};
29}
30kernel {
31	ftrace_dump_on_oops = "orig_cpu"
32	traceoff_on_warning
33}