redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

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@redhat.com>
LKML-Reference: <1270227683-14631-2-git-send-email-jolsa@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
hifive-unleashed-5.1
Jiri Olsa 2010-04-02 19:01:20 +02:00 committed by Steven Rostedt
parent 77a7f2e94e
commit 9106b69382
1 changed files with 27 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
kernel/trace/trace_functions_graph.c
View File

@ -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);
}