perf/events: Add flag to produce nsec output

libtraceevent library prints out in usecs but perf wants to print out
in nsecs. Add a flag that lets the user decide to print out in usec
or nsec times.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Arun Sharma <asharma@fb.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>

tools/lib/traceevent/event-parse.c

@@ -3940,15 +3940,16 @@ void pevent_print_event(struct pevent *pevent, struct trace_seq *s,
 	struct event_format *event;
 	unsigned long secs;
 	unsigned long usecs;
+	unsigned long nsecs;
 	const char *comm;
 	void *data = record->data;
 	int type;
 	int pid;
 	int len;
+	int p;
 
 	secs = record->ts / NSECS_PER_SEC;
-	usecs = record->ts - secs * NSECS_PER_SEC;
-	usecs = (usecs + 500) / NSECS_PER_USEC;
+	nsecs = record->ts - secs * NSECS_PER_SEC;
 
 	if (record->size < 0) {
 		do_warning("ug! negative record size %d", record->size);
@@ -3973,7 +3974,15 @@ void pevent_print_event(struct pevent *pevent, struct trace_seq *s,
 	} else
 		trace_seq_printf(s, "%16s-%-5d [%03d]", comm, pid, record->cpu);
 
-	trace_seq_printf(s, " %5lu.%06lu: %s: ", secs, usecs, event->name);
+	if (pevent->flags & PEVENT_NSEC_OUTPUT) {
+		usecs = nsecs;
+		p = 9;
+	} else {
+		usecs = (nsecs + 500) / NSECS_PER_USEC;
+		p = 6;
+	}
+
+	trace_seq_printf(s, " %5lu.%0*lu: %s: ", secs, p, usecs, event->name);
 
 	/* Space out the event names evenly. */
 	len = strlen(event->name);

tools/lib/traceevent/event-parse.h

@@ -334,6 +334,10 @@ enum pevent_func_arg_type {
 	PEVENT_FUNC_ARG_MAX_TYPES
 };
 
+enum pevent_flag {
+	PEVENT_NSEC_OUTPUT		= 1,	/* output in NSECS */
+};
+
 struct cmdline;
 struct cmdline_list;
 struct func_map;
@@ -373,6 +377,7 @@ struct pevent {
 	struct printk_list *printklist;
 	unsigned int printk_count;
 
+
 	struct event_format **events;
 	int nr_events;
 	struct event_format **sort_events;
@@ -397,6 +402,8 @@ struct pevent {
 
 	int test_filters;
 
+	int flags;
+
 	struct format_field *bprint_ip_field;
 	struct format_field *bprint_fmt_field;
 	struct format_field *bprint_buf_field;
@@ -408,6 +415,11 @@ struct pevent {
 	struct event_format *last_event;
 };
 
+static inline void pevent_set_flag(struct pevent *pevent, int flag)
+{
+	pevent->flags |= flag;
+}
+
 static inline unsigned short
 __data2host2(struct pevent *pevent, unsigned short data)
 {

tools/perf/util/trace-event-parse.c

@@ -45,6 +45,7 @@ int read_trace_init(int file_bigendian, int host_bigendian)
 	perf_pevent = pevent_alloc();
 	pevent = perf_pevent;
 
+	pevent_set_flag(pevent, PEVENT_NSEC_OUTPUT);
 	pevent_set_file_bigendian(pevent, file_bigendian);
 	pevent_set_host_bigendian(pevent, host_bigendian);