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* [PATCH] tools/lib/traceevent: Round up in tep_print_event() time precision
@ 2019-09-19 20:51 Steven Rostedt
  2019-09-23 14:24 ` Arnaldo Carvalho de Melo
  0 siblings, 1 reply; 2+ messages in thread
From: Steven Rostedt @ 2019-09-19 20:51 UTC (permalink / raw)
  To: LKML
  Cc: Linux Trace Devel, Arnaldo Carvalho de Melo, Jiri Olsa,
	Tzvetomir Stoyanov


From: "Steven Rostedt (VMware)" <rostedt@goodmis.org>


When testing the output of the old trace-cmd compared to the one that uses
the updated tep_print_event() logic, it was different in that the time stamp
precision in the old format would round up to the nearest precision, where
as the new logic truncates. Bring back the old method of rounding up.

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
 tools/lib/traceevent/event-parse.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index bb22238debfe..eb84fbb49e4d 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -5517,8 +5517,10 @@ static void print_event_time(struct tep_handle *tep, struct trace_seq *s,
 	if (divstr && isdigit(*(divstr + 1)))
 		div = atoi(divstr + 1);
 	time = record->ts;
-	if (div)
+	if (div) {
+		time += div / 2;
 		time /= div;
+	}
 	pr = prec;
 	while (pr--)
 		p10 *= 10;
-- 
2.20.1


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2019-09-19 20:51 [PATCH] tools/lib/traceevent: Round up in tep_print_event() time precision Steven Rostedt
2019-09-23 14:24 ` Arnaldo Carvalho de Melo

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