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tracing: Move sleep-time and graph-time options out of the core trace_flags 

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@goodmis.org>
This commit is contained in:
Steven Rostedt (Red Hat) 2015-09-29 19:06:50 -04:00 committed by Steven Rostedt
parent b9f9108cad
commit 5557720415
4 changed files with 35 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
kernel/trace/ftrace.c
View File

@ -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();

2
kernel/trace/trace.c
View File

@ -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 |

11
kernel/trace/trace.h
View File

@ -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

13
kernel/trace/trace_functions_graph.c
View File

@ -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;
}