Commit-ID: 9106b69382912ddc403a307b69bf894a6f3004e4
Gitweb: http://git.kernel.org/tip/9106b69382912ddc403a307b69bf894a6f3004e4
Author: Jiri Olsa <jolsa@xxxxxxxxxx>
AuthorDate: Fri, 2 Apr 2010 19:01:20 +0200
Committer: Steven Rostedt <rostedt@xxxxxxxxxxx>
CommitDate: Mon, 26 Apr 2010 16:55:08 -0400
tracing: Add ftrace events for graph tracer
Add ftrace events for graph tracer, so the graph output could be shared
with other tracers.
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
LKML-Reference: <1270227683-14631-2-git-send-email-jolsa@xxxxxxxxxx>
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
---
kernel/trace/trace_functions_graph.c | 28 +++++++++++++++++++++++++++-
1 files changed, 27 insertions(+), 1 deletions(-)
diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c
index 669b9c3..db9e06b 100644
--- a/kernel/trace/trace_functions_graph.c
+++ b/kernel/trace/trace_functions_graph.c
@@ -40,7 +40,7 @@ struct fgraph_data {
#define TRACE_GRAPH_PRINT_OVERHEAD 0x4
#define TRACE_GRAPH_PRINT_PROC 0x8
#define TRACE_GRAPH_PRINT_DURATION 0x10
-#define TRACE_GRAPH_PRINT_ABS_TIME 0X20
+#define TRACE_GRAPH_PRINT_ABS_TIME 0x20
static struct tracer_opt trace_opts[] = {
/* Display overruns? (for self-debug purpose) */
@@ -1096,6 +1096,12 @@ print_graph_function(struct trace_iterator *iter)
return TRACE_TYPE_HANDLED;
}
+static enum print_line_t
+print_graph_function_event(struct trace_iterator *iter, int flags)
+{
+ return print_graph_function(iter);
+}
+
static void print_lat_header(struct seq_file *s)
{
static const char spaces[] = " " /* 16 spaces */
@@ -1199,6 +1205,16 @@ static void graph_trace_close(struct trace_iterator *iter)
}
}
+static struct trace_event graph_trace_entry_event = {
+ .type = TRACE_GRAPH_ENT,
+ .trace = print_graph_function_event,
+};
+
+static struct trace_event graph_trace_ret_event = {
+ .type = TRACE_GRAPH_RET,
+ .trace = print_graph_function_event,
+};
+
static struct tracer graph_trace __read_mostly = {
.name = "function_graph",
.open = graph_trace_open,
@@ -1220,6 +1236,16 @@ static __init int init_graph_trace(void)
{
max_bytes_for_cpu = snprintf(NULL, 0, "%d", nr_cpu_ids - 1);
+ if (!register_ftrace_event(&graph_trace_entry_event)) {
+ pr_warning("Warning: could not register graph trace events\n");
+ return 1;
+ }
+
+ if (!register_ftrace_event(&graph_trace_ret_event)) {
+ pr_warning("Warning: could not register graph trace events\n");
+ return 1;
+ }
+
return register_tracer(&graph_trace);
}
--
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