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tracing: Move "display-graph" option to main options 

In order to facilitate making all tracer options visible even when the
tracer is not active, we need to get rid of duplicate options. Any option
that is shared between multiple tracers really should be a main option.

As the wakeup and irqsoff tracers both use the "display-graph" option, and
use it exactly the same way, move that option from the tracer options to the
main options and consolidate them.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt (Red Hat) 2015-09-28 15:37:49 -04:00 committed by Steven Rostedt
parent ef92480a58
commit 03905582fd
4 changed files with 30 additions and 64 deletions
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1
kernel/trace/trace.c
View File

@ -882,6 +882,7 @@ static const char *trace_options[] = {
"irq-info",
"markers",
"function-trace",
"display-graph",
NULL
};

1
kernel/trace/trace.h
View File

@ -913,6 +913,7 @@ enum trace_iterator_flags {
TRACE_ITER_IRQ_INFO = 0x800000,
TRACE_ITER_MARKERS = 0x1000000,
TRACE_ITER_FUNCTION = 0x2000000,
TRACE_ITER_DISPLAY_GRAPH = 0x4000000,
};
/*

46
kernel/trace/trace_irqsoff.c
View File

@ -57,22 +57,16 @@ irq_trace(void)
# define irq_trace() (0)
#endif
#define TRACE_DISPLAY_GRAPH 1
#define is_graph() (trace_flags & TRACE_ITER_DISPLAY_GRAPH)
static struct tracer_opt trace_opts[] = {
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
/* display latency trace as call graph */
{ TRACER_OPT(display-graph, TRACE_DISPLAY_GRAPH) },
static int irqsoff_display_graph(struct trace_array *tr, int set);
#else
static inline int irqsoff_display_graph(struct trace_array *tr, int set)
{
return -EINVAL;
}
#endif
{ } /* Empty entry */
};
static struct tracer_flags tracer_flags = {
.val = 0,
.opts = trace_opts,
};
#define is_graph() (tracer_flags.val & TRACE_DISPLAY_GRAPH)
/*
* Sequence count - we record it when starting a measurement and
@ -152,14 +146,10 @@ irqsoff_tracer_call(unsigned long ip, unsigned long parent_ip,
#endif /* CONFIG_FUNCTION_TRACER */
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
static int
irqsoff_set_flag(struct trace_array *tr, u32 old_flags, u32 bit, int set)
static int irqsoff_display_graph(struct trace_array *tr, int set)
{
int cpu;
if (!(bit & TRACE_DISPLAY_GRAPH))
return -EINVAL;
if (!(is_graph() ^ set))
return 0;
@ -259,12 +249,6 @@ __trace_function(struct trace_array *tr,
#else
#define __trace_function trace_function
static int
irqsoff_set_flag(struct trace_array *tr, u32 old_flags, u32 bit, int set)
{
return -EINVAL;
}
static int irqsoff_graph_entry(struct ftrace_graph_ent *trace)
{
return -1;
@ -556,12 +540,13 @@ static void unregister_irqsoff_function(struct trace_array *tr, int graph)
function_enabled = false;
}
static void irqsoff_function_set(struct trace_array *tr, int set)
static int irqsoff_function_set(struct trace_array *tr, int set)
{
if (set)
register_irqsoff_function(tr, is_graph(), 1);
else
unregister_irqsoff_function(tr, is_graph());
return 0;
}
static int irqsoff_flag_changed(struct trace_array *tr, u32 mask, int set)
@ -569,7 +554,10 @@ static int irqsoff_flag_changed(struct trace_array *tr, u32 mask, int set)
struct tracer *tracer = tr->current_trace;
if (mask & TRACE_ITER_FUNCTION)
irqsoff_function_set(tr, set);
return irqsoff_function_set(tr, set);
if (mask & TRACE_ITER_DISPLAY_GRAPH)
return irqsoff_display_graph(tr, set);
return trace_keep_overwrite(tracer, mask, set);
}
@ -666,8 +654,6 @@ static struct tracer irqsoff_tracer __read_mostly =
.print_max = true,
.print_header = irqsoff_print_header,
.print_line = irqsoff_print_line,
.flags = &tracer_flags,
.set_flag = irqsoff_set_flag,
.flag_changed = irqsoff_flag_changed,
#ifdef CONFIG_FTRACE_SELFTEST
.selftest = trace_selftest_startup_irqsoff,
@ -700,8 +686,6 @@ static struct tracer preemptoff_tracer __read_mostly =
.print_max = true,
.print_header = irqsoff_print_header,
.print_line = irqsoff_print_line,
.flags = &tracer_flags,
.set_flag = irqsoff_set_flag,
.flag_changed = irqsoff_flag_changed,
#ifdef CONFIG_FTRACE_SELFTEST
.selftest = trace_selftest_startup_preemptoff,
@ -736,8 +720,6 @@ static struct tracer preemptirqsoff_tracer __read_mostly =
.print_max = true,
.print_header = irqsoff_print_header,
.print_line = irqsoff_print_line,
.flags = &tracer_flags,
.set_flag = irqsoff_set_flag,
.flag_changed = irqsoff_flag_changed,
#ifdef CONFIG_FTRACE_SELFTEST
.selftest = trace_selftest_startup_preemptirqsoff,

46
kernel/trace/trace_sched_wakeup.c
View File

@ -40,22 +40,17 @@ static void wakeup_graph_return(struct ftrace_graph_ret *trace);
static int save_flags;
static bool function_enabled;
#define TRACE_DISPLAY_GRAPH 1
#define is_graph() (trace_flags & TRACE_ITER_DISPLAY_GRAPH)
static struct tracer_opt trace_opts[] = {
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
/* display latency trace as call graph */
{ TRACER_OPT(display-graph, TRACE_DISPLAY_GRAPH) },
static int wakeup_display_graph(struct trace_array *tr, int set);
#else
static inline int wakeup_display_graph(struct trace_array *tr, int set)
{
return -EINVAL;
}
#endif
{ } /* Empty entry */
};
static struct tracer_flags tracer_flags = {
.val = 0,
.opts = trace_opts,
};
#define is_graph() (tracer_flags.val & TRACE_DISPLAY_GRAPH)
#ifdef CONFIG_FUNCTION_TRACER
@ -163,12 +158,13 @@ static void unregister_wakeup_function(struct trace_array *tr, int graph)
function_enabled = false;
}
static void wakeup_function_set(struct trace_array *tr, int set)
static int wakeup_function_set(struct trace_array *tr, int set)
{
if (set)
register_wakeup_function(tr, is_graph(), 1);
else
unregister_wakeup_function(tr, is_graph());
return 0;
}
static int wakeup_flag_changed(struct trace_array *tr, u32 mask, int set)
@ -176,7 +172,10 @@ static int wakeup_flag_changed(struct trace_array *tr, u32 mask, int set)
struct tracer *tracer = tr->current_trace;
if (mask & TRACE_ITER_FUNCTION)
wakeup_function_set(tr, set);
return wakeup_function_set(tr, set);
if (mask & TRACE_ITER_DISPLAY_GRAPH)
return wakeup_display_graph(tr, set);
return trace_keep_overwrite(tracer, mask, set);
}
@ -203,13 +202,8 @@ static void stop_func_tracer(struct trace_array *tr, int graph)
}
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
static int
wakeup_set_flag(struct trace_array *tr, u32 old_flags, u32 bit, int set)
static int wakeup_display_graph(struct trace_array *tr, int set)
{
if (!(bit & TRACE_DISPLAY_GRAPH))
return -EINVAL;
if (!(is_graph() ^ set))
return 0;
@ -306,12 +300,6 @@ __trace_function(struct trace_array *tr,
#else
#define __trace_function trace_function
static int
wakeup_set_flag(struct trace_array *tr, u32 old_flags, u32 bit, int set)
{
return -EINVAL;
}
static int wakeup_graph_entry(struct ftrace_graph_ent *trace)
{
return -1;
@ -740,8 +728,6 @@ static struct tracer wakeup_tracer __read_mostly =
.print_max = true,
.print_header = wakeup_print_header,
.print_line = wakeup_print_line,
.flags = &tracer_flags,
.set_flag = wakeup_set_flag,
.flag_changed = wakeup_flag_changed,
#ifdef CONFIG_FTRACE_SELFTEST
.selftest = trace_selftest_startup_wakeup,
@ -762,8 +748,6 @@ static struct tracer wakeup_rt_tracer __read_mostly =
.print_max = true,
.print_header = wakeup_print_header,
.print_line = wakeup_print_line,
.flags = &tracer_flags,
.set_flag = wakeup_set_flag,
.flag_changed = wakeup_flag_changed,
#ifdef CONFIG_FTRACE_SELFTEST
.selftest = trace_selftest_startup_wakeup,
@ -784,8 +768,6 @@ static struct tracer wakeup_dl_tracer __read_mostly =
.print_max = true,
.print_header = wakeup_print_header,
.print_line = wakeup_print_line,
.flags = &tracer_flags,
.set_flag = wakeup_set_flag,
.flag_changed = wakeup_flag_changed,
#ifdef CONFIG_FTRACE_SELFTEST
.selftest = trace_selftest_startup_wakeup,