linux-kernel - [PATCH v2] tools lib traceevent: Add retrieval of preempt count and latency flags

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Date:   Tue, 22 Nov 2016 11:31:58 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Namhyung Kim <namhyung@...nel.org>
Cc:     linux-kernel@...r.kernel.org,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Ingo Molnar <mingo@...nel.org>, Jiri Olsa <jolsa@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH v2] tools lib traceevent: Add retrieval of preempt count and
 latency flags


Add a way to retrieve the preempt count as well as the latency flags from a
pevent_record.

 int pevent_data_preempt_count(pevent, record);

returns the preempt count of a record.

 int pevent_data_flags(pevent, record);

returns the latency flags for a record.

Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
---
 tools/lib/traceevent/event-parse.c | 30 ++++++++++++++++++++++++++++--
 tools/lib/traceevent/event-parse.h |  2 ++
 2 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index 664c90c8e22b..6e2dfcbf9e30 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -5191,11 +5191,11 @@ struct event_format *pevent_data_event_from_type(struct pevent *pevent, int type
 }
 
 /**
- * pevent_data_pid - parse the PID from raw data
+ * pevent_data_pid - parse the PID from record
  * @pevent: a handle to the pevent
  * @rec: the record to parse
  *
- * This returns the PID from a raw data.
+ * This returns the PID from a record.
  */
 int pevent_data_pid(struct pevent *pevent, struct pevent_record *rec)
 {
@@ -5203,6 +5203,32 @@ int pevent_data_pid(struct pevent *pevent, struct pevent_record *rec)
 }
 
 /**
+ * pevent_data_prempt_count - parse the preempt count from the record
+ * @pevent: a handle to the pevent
+ * @rec: the record to parse
+ *
+ * This returns the preempt count from a record.
+ */
+int pevent_data_prempt_count(struct pevent *pevent, struct pevent_record *rec)
+{
+	return parse_common_pc(pevent, rec->data);
+}
+
+/**
+ * pevent_data_flags - parse the latency flags from the record
+ * @pevent: a handle to the pevent
+ * @rec: the record to parse
+ *
+ * This returns the latency flags from a record.
+ *
+ *  Use trace_flag_type enum for the flags (see event-parse.h).
+ */
+int pevent_data_flags(struct pevent *pevent, struct pevent_record *rec)
+{
+	return parse_common_flags(pevent, rec->data);
+}
+
+/**
  * pevent_data_comm_from_pid - return the command line from PID
  * @pevent: a handle to the pevent
  * @pid: the PID of the task to search for
diff --git a/tools/lib/traceevent/event-parse.h b/tools/lib/traceevent/event-parse.h
index 9ffde377e89d..82b83c4d621c 100644
--- a/tools/lib/traceevent/event-parse.h
+++ b/tools/lib/traceevent/event-parse.h
@@ -712,6 +712,8 @@ void pevent_data_lat_fmt(struct pevent *pevent,
 int pevent_data_type(struct pevent *pevent, struct pevent_record *rec);
 struct event_format *pevent_data_event_from_type(struct pevent *pevent, int type);
 int pevent_data_pid(struct pevent *pevent, struct pevent_record *rec);
+int pevent_data_prempt_count(struct pevent *pevent, struct pevent_record *rec);
+int pevent_data_flags(struct pevent *pevent, struct pevent_record *rec);
 const char *pevent_data_comm_from_pid(struct pevent *pevent, int pid);
 struct cmdline;
 struct cmdline *pevent_data_pid_from_comm(struct pevent *pevent, const char *comm,
-- 
2.1.0