libtraceevent: Round up in tep_print_event() time precision

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>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Tzvetomir Stoyanov <tstoyanov@vmware.com>
Cc: linux trace devel <linux-trace-devel@vger.kernel.org>
Link: http://lore.kernel.org/lkml/20190919165119.5efa5de6@gandalf.local.home
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index 6f842af4550b843a10fc35aeb3a040fc9e4bf6fe..d948475585ced2c5664e568a9412d64032bc851b 100644 (file)
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -5527,8 +5527,10 @@ 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;