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From: Tom Zanussi <tom.zanussi@linux.intel.com>
To: rostedt@goodmis.org
Cc: tglx@linutronix.de, mhiramat@kernel.org, namhyung@kernel.org,
	linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org,
	Tom Zanussi <tom.zanussi@linux.intel.com>
Subject: [RFC][PATCH 04/21] tracing: Give event triggers access to ring_buffer_event
Date: Wed,  8 Feb 2017 11:25:00 -0600	[thread overview]
Message-ID: <a8fe827ba23b8cac627dae3c69d8e0b81c8e87c1.1486569306.git.tom.zanussi@linux.intel.com> (raw)
In-Reply-To: <cover.1486569306.git.tom.zanussi@linux.intel.com>
In-Reply-To: <cover.1486569306.git.tom.zanussi@linux.intel.com>

The ring_buffer event can provide a timestamp that may be useful to
various triggers - pass it into the handlers for that purpose.

Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
---
 include/linux/trace_events.h        | 14 ++++++-----
 kernel/trace/trace.h                |  9 +++----
 kernel/trace/trace_events_hist.c    | 11 +++++----
 kernel/trace/trace_events_trigger.c | 47 +++++++++++++++++++++++--------------
 4 files changed, 49 insertions(+), 32 deletions(-)

diff --git a/include/linux/trace_events.h b/include/linux/trace_events.h
index be00761..06a5d2d 100644
--- a/include/linux/trace_events.h
+++ b/include/linux/trace_events.h
@@ -395,11 +395,13 @@ enum event_trigger_type {
 
 extern int filter_match_preds(struct event_filter *filter, void *rec);
 
-extern enum event_trigger_type event_triggers_call(struct trace_event_file *file,
-						   void *rec);
-extern void event_triggers_post_call(struct trace_event_file *file,
-				     enum event_trigger_type tt,
-				     void *rec);
+extern enum event_trigger_type
+event_triggers_call(struct trace_event_file *file, void *rec,
+		    struct ring_buffer_event *event);
+extern void
+event_triggers_post_call(struct trace_event_file *file,
+			 enum event_trigger_type tt,
+			 void *rec, struct ring_buffer_event *event);
 
 bool trace_event_ignore_this_pid(struct trace_event_file *trace_file);
 
@@ -419,7 +421,7 @@ extern void event_triggers_post_call(struct trace_event_file *file,
 
 	if (!(eflags & EVENT_FILE_FL_TRIGGER_COND)) {
 		if (eflags & EVENT_FILE_FL_TRIGGER_MODE)
-			event_triggers_call(file, NULL);
+			event_triggers_call(file, NULL, NULL);
 		if (eflags & EVENT_FILE_FL_SOFT_DISABLED)
 			return true;
 		if (eflags & EVENT_FILE_FL_PID_FILTER)
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 12bc7fa..ac55fa1 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -1187,7 +1187,7 @@ static inline void trace_buffer_unlock_commit(struct trace_array *tr,
 	unsigned long eflags = file->flags;
 
 	if (eflags & EVENT_FILE_FL_TRIGGER_COND)
-		*tt = event_triggers_call(file, entry);
+		*tt = event_triggers_call(file, entry, event);
 
 	if (test_bit(EVENT_FILE_FL_SOFT_DISABLED_BIT, &file->flags) ||
 	    (unlikely(file->flags & EVENT_FILE_FL_FILTERED) &&
@@ -1224,7 +1224,7 @@ static inline void trace_buffer_unlock_commit(struct trace_array *tr,
 		trace_buffer_unlock_commit(file->tr, buffer, event, irq_flags, pc);
 
 	if (tt)
-		event_triggers_post_call(file, tt, entry);
+		event_triggers_post_call(file, tt, entry, event);
 }
 
 /**
@@ -1257,7 +1257,7 @@ static inline void trace_buffer_unlock_commit(struct trace_array *tr,
 						irq_flags, pc, regs);
 
 	if (tt)
-		event_triggers_post_call(file, tt, entry);
+		event_triggers_post_call(file, tt, entry, event);
 }
 
 #define FILTER_PRED_INVALID	((unsigned short)-1)
@@ -1479,7 +1479,8 @@ extern void set_named_trigger_data(struct event_trigger_data *data,
  */
 struct event_trigger_ops {
 	void			(*func)(struct event_trigger_data *data,
-					void *rec);
+					void *rec,
+					struct ring_buffer_event *rbe);
 	int			(*init)(struct event_trigger_ops *ops,
 					struct event_trigger_data *data);
 	void			(*free)(struct event_trigger_ops *ops,
diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index afd766a..902df2c 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -907,7 +907,8 @@ static inline void add_to_key(char *compound_key, void *key,
 	memcpy(compound_key + key_field->offset, key, size);
 }
 
-static void event_hist_trigger(struct event_trigger_data *data, void *rec)
+static void event_hist_trigger(struct event_trigger_data *data, void *rec,
+			       struct ring_buffer_event *event)
 {
 	struct hist_trigger_data *hist_data = data->private_data;
 	bool use_compound_key = (hist_data->n_keys > 1);
@@ -1658,7 +1659,8 @@ __init int register_trigger_hist_cmd(void)
 }
 
 static void
-hist_enable_trigger(struct event_trigger_data *data, void *rec)
+hist_enable_trigger(struct event_trigger_data *data, void *rec,
+		    struct ring_buffer_event *event)
 {
 	struct enable_trigger_data *enable_data = data->private_data;
 	struct event_trigger_data *test;
@@ -1674,7 +1676,8 @@ __init int register_trigger_hist_cmd(void)
 }
 
 static void
-hist_enable_count_trigger(struct event_trigger_data *data, void *rec)
+hist_enable_count_trigger(struct event_trigger_data *data, void *rec,
+			  struct ring_buffer_event *event)
 {
 	if (!data->count)
 		return;
@@ -1682,7 +1685,7 @@ __init int register_trigger_hist_cmd(void)
 	if (data->count != -1)
 		(data->count)--;
 
-	hist_enable_trigger(data, rec);
+	hist_enable_trigger(data, rec, event);
 }
 
 static struct event_trigger_ops hist_enable_trigger_ops = {
diff --git a/kernel/trace/trace_events_trigger.c b/kernel/trace/trace_events_trigger.c
index 6721a1e8..152548f 100644
--- a/kernel/trace/trace_events_trigger.c
+++ b/kernel/trace/trace_events_trigger.c
@@ -62,7 +62,8 @@ void trigger_data_free(struct event_trigger_data *data)
  * any trigger that should be deferred, ETT_NONE if nothing to defer.
  */
 enum event_trigger_type
-event_triggers_call(struct trace_event_file *file, void *rec)
+event_triggers_call(struct trace_event_file *file, void *rec,
+		    struct ring_buffer_event *event)
 {
 	struct event_trigger_data *data;
 	enum event_trigger_type tt = ETT_NONE;
@@ -75,7 +76,7 @@ enum event_trigger_type
 		if (data->paused)
 			continue;
 		if (!rec) {
-			data->ops->func(data, rec);
+			data->ops->func(data, rec, event);
 			continue;
 		}
 		filter = rcu_dereference_sched(data->filter);
@@ -85,7 +86,7 @@ enum event_trigger_type
 			tt |= data->cmd_ops->trigger_type;
 			continue;
 		}
-		data->ops->func(data, rec);
+		data->ops->func(data, rec, event);
 	}
 	return tt;
 }
@@ -107,7 +108,7 @@ enum event_trigger_type
 void
 event_triggers_post_call(struct trace_event_file *file,
 			 enum event_trigger_type tt,
-			 void *rec)
+			 void *rec, struct ring_buffer_event *event)
 {
 	struct event_trigger_data *data;
 
@@ -115,7 +116,7 @@ enum event_trigger_type
 		if (data->paused)
 			continue;
 		if (data->cmd_ops->trigger_type & tt)
-			data->ops->func(data, rec);
+			data->ops->func(data, rec, event);
 	}
 }
 EXPORT_SYMBOL_GPL(event_triggers_post_call);
@@ -908,7 +909,8 @@ void set_named_trigger_data(struct event_trigger_data *data,
 }
 
 static void
-traceon_trigger(struct event_trigger_data *data, void *rec)
+traceon_trigger(struct event_trigger_data *data, void *rec,
+		struct ring_buffer_event *event)
 {
 	if (tracing_is_on())
 		return;
@@ -917,7 +919,8 @@ void set_named_trigger_data(struct event_trigger_data *data,
 }
 
 static void
-traceon_count_trigger(struct event_trigger_data *data, void *rec)
+traceon_count_trigger(struct event_trigger_data *data, void *rec,
+		      struct ring_buffer_event *event)
 {
 	if (tracing_is_on())
 		return;
@@ -932,7 +935,8 @@ void set_named_trigger_data(struct event_trigger_data *data,
 }
 
 static void
-traceoff_trigger(struct event_trigger_data *data, void *rec)
+traceoff_trigger(struct event_trigger_data *data, void *rec,
+		 struct ring_buffer_event *event)
 {
 	if (!tracing_is_on())
 		return;
@@ -941,7 +945,8 @@ void set_named_trigger_data(struct event_trigger_data *data,
 }
 
 static void
-traceoff_count_trigger(struct event_trigger_data *data, void *rec)
+traceoff_count_trigger(struct event_trigger_data *data, void *rec,
+		       struct ring_buffer_event *event)
 {
 	if (!tracing_is_on())
 		return;
@@ -1038,13 +1043,15 @@ void set_named_trigger_data(struct event_trigger_data *data,
 
 #ifdef CONFIG_TRACER_SNAPSHOT
 static void
-snapshot_trigger(struct event_trigger_data *data, void *rec)
+snapshot_trigger(struct event_trigger_data *data, void *rec,
+		 struct ring_buffer_event *event)
 {
 	tracing_snapshot();
 }
 
 static void
-snapshot_count_trigger(struct event_trigger_data *data, void *rec)
+snapshot_count_trigger(struct event_trigger_data *data, void *rec,
+		       struct ring_buffer_event *event)
 {
 	if (!data->count)
 		return;
@@ -1052,7 +1059,7 @@ void set_named_trigger_data(struct event_trigger_data *data,
 	if (data->count != -1)
 		(data->count)--;
 
-	snapshot_trigger(data, rec);
+	snapshot_trigger(data, rec, event);
 }
 
 static int
@@ -1131,13 +1138,15 @@ static __init int register_trigger_snapshot_cmd(void)
 #define STACK_SKIP 3
 
 static void
-stacktrace_trigger(struct event_trigger_data *data, void *rec)
+stacktrace_trigger(struct event_trigger_data *data, void *rec,
+		   struct ring_buffer_event *event)
 {
 	trace_dump_stack(STACK_SKIP);
 }
 
 static void
-stacktrace_count_trigger(struct event_trigger_data *data, void *rec)
+stacktrace_count_trigger(struct event_trigger_data *data, void *rec,
+			 struct ring_buffer_event *event)
 {
 	if (!data->count)
 		return;
@@ -1145,7 +1154,7 @@ static __init int register_trigger_snapshot_cmd(void)
 	if (data->count != -1)
 		(data->count)--;
 
-	stacktrace_trigger(data, rec);
+	stacktrace_trigger(data, rec, event);
 }
 
 static int
@@ -1207,7 +1216,8 @@ static __init void unregister_trigger_traceon_traceoff_cmds(void)
 }
 
 static void
-event_enable_trigger(struct event_trigger_data *data, void *rec)
+event_enable_trigger(struct event_trigger_data *data, void *rec,
+		     struct ring_buffer_event *event)
 {
 	struct enable_trigger_data *enable_data = data->private_data;
 
@@ -1218,7 +1228,8 @@ static __init void unregister_trigger_traceon_traceoff_cmds(void)
 }
 
 static void
-event_enable_count_trigger(struct event_trigger_data *data, void *rec)
+event_enable_count_trigger(struct event_trigger_data *data, void *rec,
+			   struct ring_buffer_event *event)
 {
 	struct enable_trigger_data *enable_data = data->private_data;
 
@@ -1232,7 +1243,7 @@ static __init void unregister_trigger_traceon_traceoff_cmds(void)
 	if (data->count != -1)
 		(data->count)--;
 
-	event_enable_trigger(data, rec);
+	event_enable_trigger(data, rec, event);
 }
 
 int event_enable_trigger_print(struct seq_file *m,
-- 
1.9.3

  parent reply	other threads:[~2017-02-08 17:44 UTC|newest]

Thread overview: 56+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-02-08 17:24 [RFC][PATCH 00/21] tracing: Inter-event (e.g. latency) support Tom Zanussi
2017-02-08 17:24 ` [RFC][PATCH 01/21] tracing: Add hist_field_name() accessor Tom Zanussi
2017-02-08 20:09   ` Steven Rostedt
2017-02-08 17:24 ` [RFC][PATCH 02/21] tracing: Reimplement log2 Tom Zanussi
2017-02-08 20:13   ` Steven Rostedt
2017-02-08 20:25     ` Tom Zanussi
2017-02-08 17:24 ` [RFC][PATCH 03/21] ring-buffer: Add TIME_EXTEND_ABS ring buffer type Tom Zanussi
2017-02-08 20:32   ` Steven Rostedt
2017-02-08 20:55     ` Tom Zanussi
2017-02-09 14:54       ` Steven Rostedt
2017-02-10  6:04     ` Namhyung Kim
2017-02-10 14:28       ` Steven Rostedt
2017-02-08 17:25 ` Tom Zanussi [this message]
2017-02-08 17:25 ` [RFC][PATCH 05/21] tracing: Add ring buffer event param to hist field functions Tom Zanussi
2017-02-08 17:25 ` [RFC][PATCH 06/21] tracing: Increase tracing map KEYS_MAX size Tom Zanussi
2017-02-08 17:25 ` [RFC][PATCH 07/21] tracing: Break out hist trigger assignment parsing Tom Zanussi
2017-02-08 17:25 ` [RFC][PATCH 08/21] tracing: Make traceprobe parsing code reusable Tom Zanussi
2017-02-09 20:40   ` Steven Rostedt
2017-02-08 17:25 ` [RFC][PATCH 09/21] tracing: Add hist trigger timestamp support Tom Zanussi
2017-02-10  6:14   ` Namhyung Kim
2017-02-08 17:25 ` [RFC][PATCH 10/21] tracing: Add per-element variable support to tracing_map Tom Zanussi
2017-02-08 17:25 ` [RFC][PATCH 11/21] tracing: Add variable support to hist triggers Tom Zanussi
2017-02-13  6:03   ` Namhyung Kim
2017-02-14 15:25     ` Tom Zanussi
2017-02-08 17:25 ` [RFC][PATCH 12/21] tracing: Account for variables in named trigger compatibility Tom Zanussi
2017-02-13  6:04   ` Namhyung Kim
2017-02-14 15:26     ` Tom Zanussi
2017-02-08 17:25 ` [RFC][PATCH 13/21] tracing: Add simple expression support to hist triggers Tom Zanussi
2017-02-14  2:37   ` Namhyung Kim
2017-02-14 15:29     ` Tom Zanussi
2017-02-08 17:25 ` [RFC][PATCH 14/21] tracing: Add variable reference handling " Tom Zanussi
2017-02-08 17:25 ` [RFC][PATCH 15/21] tracing: Add usecs modifier for hist trigger timestamps Tom Zanussi
2017-02-08 17:25 ` [RFC][PATCH 16/21] tracing: Add support for dynamic tracepoints Tom Zanussi
2017-02-08 17:25 ` [RFC][PATCH 17/21] tracing: Add hist trigger action hook Tom Zanussi
2017-02-08 17:25 ` [RFC][PATCH 18/21] tracing: Add support for 'synthetic' events Tom Zanussi
2017-02-08 17:25 ` [RFC][PATCH 19/21] tracing: Add 'onmatch' hist trigger action support Tom Zanussi
2017-02-08 17:25 ` [RFC][PATCH 20/21] tracing: Add 'onmax' " Tom Zanussi
2017-02-08 17:25 ` [RFC][PATCH 21/21] tracing: Add inter-event hist trigger Documentation Tom Zanussi
2017-02-08 20:01 ` [RFC][PATCH 00/21] tracing: Inter-event (e.g. latency) support Steven Rostedt
2017-02-08 20:19   ` Tom Zanussi
2017-02-08 23:28   ` Tom Zanussi
2017-02-09  2:14     ` Steven Rostedt
2017-02-08 23:13 ` Masami Hiramatsu
2017-02-09  1:14   ` Tom Zanussi
2017-02-09 14:18     ` Masami Hiramatsu
2017-02-09 17:18       ` Tom Zanussi
2017-02-09 19:57         ` Steven Rostedt
2017-02-09 14:46     ` Frank Ch. Eigler
2017-02-09 18:43       ` Tom Zanussi
2017-02-10  4:16 ` Namhyung Kim
2017-02-10  9:34   ` Masami Hiramatsu
2017-02-10 18:58     ` Tom Zanussi
2017-02-13  1:04       ` Namhyung Kim
2017-02-14  9:37         ` Masami Hiramatsu
2017-02-14 15:27         ` Tom Zanussi
2017-02-10 18:43   ` Tom Zanussi

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