From 981d081ec8b958b7d962ee40d433581a55d40fc5 Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Mon, 2 Mar 2009 13:53:59 -0500 Subject: tracing: add format file to describe event struct fields This patch adds the "format" file to the trace point event directory. This is based off of work by Tom Zanussi, in which a file is exported to be tread from user land such that a user space app may read the binary record stored in the ring buffer. # cat /debug/tracing/events/sched/sched_switch/format field:pid_t prev_pid; offset:12; size:4; field:int prev_prio; offset:16; size:4; field special:char next_comm[TASK_COMM_LEN]; offset:20; size:16; field:pid_t next_pid; offset:36; size:4; field:int next_prio; offset:40; size:4; Idea-from: Tom Zanussi Signed-off-by: Steven Rostedt --- kernel/trace/trace_events_stage_3.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'kernel/trace/trace_events_stage_3.h') diff --git a/kernel/trace/trace_events_stage_3.h b/kernel/trace/trace_events_stage_3.h index 2ab65e95822..c62a4d2a528 100644 --- a/kernel/trace/trace_events_stage_3.h +++ b/kernel/trace/trace_events_stage_3.h @@ -101,6 +101,7 @@ * .raw_init = ftrace_raw_init_event_, * .raw_reg = ftrace_raw_reg_event_, * .raw_unreg = ftrace_raw_unreg_event_, + * .show_format = ftrace_format_, * } * */ @@ -230,4 +231,5 @@ __attribute__((section("_ftrace_events"))) event_##call = { \ .raw_init = ftrace_raw_init_event_##call, \ .raw_reg = ftrace_raw_reg_event_##call, \ .raw_unreg = ftrace_raw_unreg_event_##call, \ + .show_format = ftrace_format_##call, \ } -- cgit v1.2.3