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path: root/kernel/trace/trace_sched_wakeup.c
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Diffstat (limited to 'kernel/trace/trace_sched_wakeup.c')
-rw-r--r--kernel/trace/trace_sched_wakeup.c122
1 files changed, 60 insertions, 62 deletions
diff --git a/kernel/trace/trace_sched_wakeup.c b/kernel/trace/trace_sched_wakeup.c
index 12cbe77b4..9d4399b55 100644
--- a/kernel/trace/trace_sched_wakeup.c
+++ b/kernel/trace/trace_sched_wakeup.c
@@ -34,31 +34,28 @@ static arch_spinlock_t wakeup_lock =
static void wakeup_reset(struct trace_array *tr);
static void __wakeup_reset(struct trace_array *tr);
-static int wakeup_graph_entry(struct ftrace_graph_ent *trace);
-static void wakeup_graph_return(struct ftrace_graph_ret *trace);
static int save_flags;
-static bool function_enabled;
-
-#define TRACE_DISPLAY_GRAPH 1
-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);
+# define is_graph(tr) ((tr)->trace_flags & TRACE_ITER_DISPLAY_GRAPH)
+#else
+static inline int wakeup_display_graph(struct trace_array *tr, int set)
+{
+ return 0;
+}
+# define is_graph(tr) false
#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
+static int wakeup_graph_entry(struct ftrace_graph_ent *trace);
+static void wakeup_graph_return(struct ftrace_graph_ret *trace);
+
+static bool function_enabled;
+
/*
* Prologue for the wakeup function tracers.
*
@@ -128,14 +125,13 @@ wakeup_tracer_call(unsigned long ip, unsigned long parent_ip,
atomic_dec(&data->disabled);
preempt_enable_notrace();
}
-#endif /* CONFIG_FUNCTION_TRACER */
static int register_wakeup_function(struct trace_array *tr, int graph, int set)
{
int ret;
/* 'set' is set if TRACE_ITER_FUNCTION is about to be set */
- if (function_enabled || (!set && !(trace_flags & TRACE_ITER_FUNCTION)))
+ if (function_enabled || (!set && !(tr->trace_flags & TRACE_ITER_FUNCTION)))
return 0;
if (graph)
@@ -163,20 +159,40 @@ 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, u32 mask, int set)
{
+ if (!(mask & TRACE_ITER_FUNCTION))
+ return 0;
+
if (set)
- register_wakeup_function(tr, is_graph(), 1);
+ register_wakeup_function(tr, is_graph(tr), 1);
else
- unregister_wakeup_function(tr, is_graph());
+ unregister_wakeup_function(tr, is_graph(tr));
+ return 1;
+}
+#else
+static int register_wakeup_function(struct trace_array *tr, int graph, int set)
+{
+ return 0;
+}
+static void unregister_wakeup_function(struct trace_array *tr, int graph) { }
+static int wakeup_function_set(struct trace_array *tr, u32 mask, int set)
+{
+ return 0;
}
+#endif /* CONFIG_FUNCTION_TRACER */
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);
+ if (wakeup_function_set(tr, mask, set))
+ return 0;
+
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+ if (mask & TRACE_ITER_DISPLAY_GRAPH)
+ return wakeup_display_graph(tr, set);
+#endif
return trace_keep_overwrite(tracer, mask, set);
}
@@ -203,14 +219,9 @@ 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))
+ if (!(is_graph(tr) ^ set))
return 0;
stop_func_tracer(tr, !set);
@@ -259,7 +270,7 @@ static void wakeup_graph_return(struct ftrace_graph_ret *trace)
static void wakeup_trace_open(struct trace_iterator *iter)
{
- if (is_graph())
+ if (is_graph(iter->tr))
graph_trace_open(iter);
}
@@ -279,7 +290,7 @@ static enum print_line_t wakeup_print_line(struct trace_iterator *iter)
* In graph mode call the graph tracer output function,
* otherwise go with the TRACE_FN event handler
*/
- if (is_graph())
+ if (is_graph(iter->tr))
return print_graph_function_flags(iter, GRAPH_TRACER_FLAGS);
return TRACE_TYPE_UNHANDLED;
@@ -287,7 +298,7 @@ static enum print_line_t wakeup_print_line(struct trace_iterator *iter)
static void wakeup_print_header(struct seq_file *s)
{
- if (is_graph())
+ if (is_graph(wakeup_trace))
print_graph_headers_flags(s, GRAPH_TRACER_FLAGS);
else
trace_default_header(s);
@@ -298,7 +309,7 @@ __trace_function(struct trace_array *tr,
unsigned long ip, unsigned long parent_ip,
unsigned long flags, int pc)
{
- if (is_graph())
+ if (is_graph(tr))
trace_graph_function(tr, ip, parent_ip, flags, pc);
else
trace_function(tr, ip, parent_ip, flags, pc);
@@ -306,27 +317,20 @@ __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;
-}
-
static enum print_line_t wakeup_print_line(struct trace_iterator *iter)
{
return TRACE_TYPE_UNHANDLED;
}
-static void wakeup_graph_return(struct ftrace_graph_ret *trace) { }
static void wakeup_trace_open(struct trace_iterator *iter) { }
static void wakeup_trace_close(struct trace_iterator *iter) { }
#ifdef CONFIG_FUNCTION_TRACER
+static int wakeup_graph_entry(struct ftrace_graph_ent *trace)
+{
+ return -1;
+}
+static void wakeup_graph_return(struct ftrace_graph_ret *trace) { }
static void wakeup_print_header(struct seq_file *s)
{
trace_default_header(s);
@@ -342,16 +346,16 @@ static void wakeup_print_header(struct seq_file *s)
/*
* Should this new latency be reported/recorded?
*/
-static int report_latency(struct trace_array *tr, cycle_t delta)
+static bool report_latency(struct trace_array *tr, cycle_t delta)
{
if (tracing_thresh) {
if (delta < tracing_thresh)
- return 0;
+ return false;
} else {
if (delta <= tr->max_latency)
- return 0;
+ return false;
}
- return 1;
+ return true;
}
static void
@@ -388,7 +392,7 @@ tracing_sched_switch_trace(struct trace_array *tr,
entry->next_cpu = task_cpu(next);
if (!call_filter_check_discard(call, entry, buffer, event))
- trace_buffer_unlock_commit(buffer, event, flags, pc);
+ trace_buffer_unlock_commit(tr, buffer, event, flags, pc);
}
static void
@@ -416,11 +420,11 @@ tracing_sched_wakeup_trace(struct trace_array *tr,
entry->next_cpu = task_cpu(wakee);
if (!call_filter_check_discard(call, entry, buffer, event))
- trace_buffer_unlock_commit(buffer, event, flags, pc);
+ trace_buffer_unlock_commit(tr, buffer, event, flags, pc);
}
static void notrace
-probe_wakeup_sched_switch(void *ignore,
+probe_wakeup_sched_switch(void *ignore, bool preempt,
struct task_struct *prev, struct task_struct *next)
{
struct trace_array_cpu *data;
@@ -635,7 +639,7 @@ static void start_wakeup_tracer(struct trace_array *tr)
*/
smp_wmb();
- if (start_func_tracer(tr, is_graph()))
+ if (start_func_tracer(tr, is_graph(tr)))
printk(KERN_ERR "failed to start wakeup tracer\n");
return;
@@ -648,7 +652,7 @@ fail_deprobe:
static void stop_wakeup_tracer(struct trace_array *tr)
{
tracer_enabled = 0;
- stop_func_tracer(tr, is_graph());
+ stop_func_tracer(tr, is_graph(tr));
unregister_trace_sched_switch(probe_wakeup_sched_switch, NULL);
unregister_trace_sched_wakeup_new(probe_wakeup, NULL);
unregister_trace_sched_wakeup(probe_wakeup, NULL);
@@ -659,7 +663,7 @@ static bool wakeup_busy;
static int __wakeup_tracer_init(struct trace_array *tr)
{
- save_flags = trace_flags;
+ save_flags = tr->trace_flags;
/* non overwrite screws up the latency tracers */
set_tracer_flag(tr, TRACE_ITER_OVERWRITE, 1);
@@ -740,8 +744,6 @@ 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 +764,6 @@ 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 +784,6 @@ 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,
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-10 18:24:52 +0000