[for-next][PATCH 20/25] tracing: Move sleep-time and graph-time options out of the core trace_flags

[Steven Rostedt]

From: "Steven Rostedt (Red Hat)" <rostedt@xxxxxxxxxxx>

The sleep-time and graph-time options are only for the function graph tracer
and are not used by anything else. As tracer options are now visible when
the tracer is not activated, its better to move the function graph specific
tracer options into the function graph tracer.

Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
---
 kernel/trace/ftrace.c                | 19 +++++++++++++++++--
 kernel/trace/trace.c                 |  2 +-
 kernel/trace/trace.h                 | 11 +++++------
 kernel/trace/trace_functions_graph.c | 13 ++++++++++++-
 4 files changed, 35 insertions(+), 10 deletions(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index b0623ac785a2..e76384894147 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -243,6 +243,11 @@ static void ftrace_sync_ipi(void *data)
 
 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
 static void update_function_graph_func(void);
+
+/* Both enabled by default (can be cleared by function_graph tracer flags */
+static bool fgraph_sleep_time = true;
+static bool fgraph_graph_time = true;
+
 #else
 static inline void update_function_graph_func(void) { }
 #endif
@@ -917,7 +922,7 @@ static void profile_graph_return(struct ftrace_graph_ret *trace)
 
 	calltime = trace->rettime - trace->calltime;
 
-	if (!(trace_flags & TRACE_ITER_GRAPH_TIME)) {
+	if (!fgraph_graph_time) {
 		int index;
 
 		index = trace->depth;
@@ -5639,6 +5644,16 @@ static struct ftrace_ops graph_ops = {
 	ASSIGN_OPS_HASH(graph_ops, &global_ops.local_hash)
 };
 
+void ftrace_graph_sleep_time_control(bool enable)
+{
+	fgraph_sleep_time = enable;
+}
+
+void ftrace_graph_graph_time_control(bool enable)
+{
+	fgraph_graph_time = enable;
+}
+
 int ftrace_graph_entry_stub(struct ftrace_graph_ent *trace)
 {
 	return 0;
@@ -5707,7 +5722,7 @@ ftrace_graph_probe_sched_switch(void *ignore,
 	 * Does the user want to count the time a function was asleep.
 	 * If so, do not update the time stamps.
 	 */
-	if (trace_flags & TRACE_ITER_SLEEP_TIME)
+	if (fgraph_sleep_time)
 		return;
 
 	timestamp = trace_clock_local();
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index d98789b112c6..e26933c2edaa 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -492,7 +492,7 @@ static inline void ftrace_trace_stack(struct ring_buffer *buffer,
 
 /* trace_flags holds trace_options default values */
 unsigned long trace_flags =
-	FUNCTION_DEFAULT_FLAGS | FUNCTION_GRAPH_DEFAULT_FLAGS |
+	FUNCTION_DEFAULT_FLAGS |
 	TRACE_ITER_PRINT_PARENT | TRACE_ITER_PRINTK |
 	TRACE_ITER_ANNOTATE | TRACE_ITER_CONTEXT_INFO |
 	TRACE_ITER_RECORD_CMD | TRACE_ITER_OVERWRITE |
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 33d1e5384481..5219bf5f708a 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -714,9 +714,14 @@ extern char trace_find_mark(unsigned long long duration);
 #define TRACE_GRAPH_PRINT_ABS_TIME      0x20
 #define TRACE_GRAPH_PRINT_IRQS          0x40
 #define TRACE_GRAPH_PRINT_TAIL          0x80
+#define TRACE_GRAPH_SLEEP_TIME		0x100
+#define TRACE_GRAPH_GRAPH_TIME		0x200
 #define TRACE_GRAPH_PRINT_FILL_SHIFT	28
 #define TRACE_GRAPH_PRINT_FILL_MASK	(0x3 << TRACE_GRAPH_PRINT_FILL_SHIFT)
 
+extern void ftrace_graph_sleep_time_control(bool enable);
+extern void ftrace_graph_graph_time_control(bool enable);
+
 extern enum print_line_t
 print_graph_function_flags(struct trace_iterator *iter, u32 flags);
 extern void print_graph_headers_flags(struct seq_file *s, u32 flags);
@@ -892,15 +897,9 @@ extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf,
  */
 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
 # define FGRAPH_FLAGS						\
-		C(SLEEP_TIME,		"sleep-time"),		\
-		C(GRAPH_TIME,		"graph-time"),		\
 		C(DISPLAY_GRAPH,	"display-graph"),
-/* Initially set for trace_flags */
-# define FUNCTION_GRAPH_DEFAULT_FLAGS \
-	(TRACE_ITER_SLEEP_TIME | TRACE_ITER_GRAPH_TIME)
 #else
 # define FGRAPH_FLAGS
-# define FUNCTION_GRAPH_DEFAULT_FLAGS  0UL
 #endif
 
 #ifdef CONFIG_BRANCH_TRACER
diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c
index ca98445782ac..86e45c2658e4 100644
--- a/kernel/trace/trace_functions_graph.c
+++ b/kernel/trace/trace_functions_graph.c
@@ -83,13 +83,18 @@ static struct tracer_opt trace_opts[] = {
 	{ TRACER_OPT(funcgraph-irqs, TRACE_GRAPH_PRINT_IRQS) },
 	/* Display function name after trailing } */
 	{ TRACER_OPT(funcgraph-tail, TRACE_GRAPH_PRINT_TAIL) },
+	/* Include sleep time (scheduled out) between entry and return */
+	{ TRACER_OPT(sleep-time, TRACE_GRAPH_SLEEP_TIME) },
+	/* Include time within nested functions */
+	{ TRACER_OPT(graph-time, TRACE_GRAPH_GRAPH_TIME) },
 	{ } /* Empty entry */
 };
 
 static struct tracer_flags tracer_flags = {
 	/* Don't display overruns, proc, or tail by default */
 	.val = TRACE_GRAPH_PRINT_CPU | TRACE_GRAPH_PRINT_OVERHEAD |
-	       TRACE_GRAPH_PRINT_DURATION | TRACE_GRAPH_PRINT_IRQS,
+	       TRACE_GRAPH_PRINT_DURATION | TRACE_GRAPH_PRINT_IRQS |
+	       TRACE_GRAPH_SLEEP_TIME | TRACE_GRAPH_GRAPH_TIME,
 	.opts = trace_opts
 };
 
@@ -1362,6 +1367,12 @@ func_graph_set_flag(struct trace_array *tr, u32 old_flags, u32 bit, int set)
 	if (bit == TRACE_GRAPH_PRINT_IRQS)
 		ftrace_graph_skip_irqs = !set;
 
+	if (bit == TRACE_GRAPH_SLEEP_TIME)
+		ftrace_graph_sleep_time_control(set);
+
+	if (bit == TRACE_GRAPH_GRAPH_TIME)
+		ftrace_graph_graph_time_control(set);
+
 	return 0;
 }
 
-- 
2.5.1


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/