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tracing: Add graph output support for irqsoff tracer

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Add function graph output to irqsoff tracer.

The graph output is enabled by setting new 'display-graph' trace option.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
LKML-Reference: <1270227683-14631-4-git-send-email-jolsa@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Jiri Olsa 2010-04-02 19:01:22 +02:00 • committed by Steven Rostedt
parent d7a8d9e907
commit 62b915f106
5 changed files with 324 additions and 33 deletions
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15
kernel/trace/trace_functions_graph.c
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@ -179,7 +179,7 @@ unsigned long ftrace_return_to_handler(unsigned long frame_pointer)
return ret;
}
static int __trace_graph_entry(struct trace_array *tr,
int __trace_graph_entry(struct trace_array *tr,
struct ftrace_graph_ent *trace,
unsigned long flags,
int pc)
@ -246,7 +246,7 @@ int trace_graph_thresh_entry(struct ftrace_graph_ent *trace)
return trace_graph_entry(trace);
}
static void __trace_graph_return(struct trace_array *tr,
void __trace_graph_return(struct trace_array *tr,
struct ftrace_graph_ret *trace,
unsigned long flags,
int pc)
@ -1093,6 +1093,11 @@ print_graph_function_flags(struct trace_iterator *iter, u32 flags)
trace_assign_type(field, entry);
return print_graph_return(&field->ret, s, entry, iter, flags);
}
case TRACE_STACK:
case TRACE_FN:
/* dont trace stack and functions as comments */
return TRACE_TYPE_UNHANDLED;
default:
return print_graph_comment(s, entry, iter, flags);
}
@ -1170,12 +1175,12 @@ void print_graph_headers_flags(struct seq_file *s, u32 flags)
seq_printf(s, " | | | |\n");
}
static void print_graph_headers(struct seq_file *s)
void print_graph_headers(struct seq_file *s)
{
print_graph_headers_flags(s, tracer_flags.val);
}
static void graph_trace_open(struct trace_iterator *iter)
void graph_trace_open(struct trace_iterator *iter)
{
/* pid and depth on the last trace processed */
struct fgraph_data *data;
@ -1210,7 +1215,7 @@ static void graph_trace_open(struct trace_iterator *iter)
pr_warning("function graph tracer: not enough memory\n");
}
static void graph_trace_close(struct trace_iterator *iter)
void graph_trace_close(struct trace_iterator *iter)
{
struct fgraph_data *data = iter->private;