Commit-ID: 21a30100453516004905d4d5f0806ebaffa95131 Gitweb: http://git.kernel.org/tip/21a30100453516004905d4d5f0806ebaffa95131 Author: Chaos.Chen <[email protected]> AuthorDate: Tue, 9 Feb 2016 15:40:14 -0500 Committer: Arnaldo Carvalho de Melo <[email protected]> CommitDate: Thu, 3 Mar 2016 11:10:37 -0300
tools lib traceevent: Fix time stamp rounding issue When rounding to microseconds, if the timestamp subsecond is between .999999500 and .999999999, it is rounded to .1000000, when it should instead increment the second counter due to the overflow. For example, if the timestamp is 1234.999999501 instead of seeing: 1235.000000 we see: 1234.1000000 Signed-off-by: Chaos.Chen <[email protected]> Cc: Andrew Morton <[email protected]> Link: http://lkml.kernel.org/r/[email protected] [ fixed incrementing "secs" instead of decrementing it ] Signed-off-by: Steven Rostedt <[email protected]> Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> --- tools/lib/traceevent/event-parse.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c index 9a1e48a..ce59f48 100644 --- a/tools/lib/traceevent/event-parse.c +++ b/tools/lib/traceevent/event-parse.c @@ -5429,6 +5429,11 @@ void pevent_print_event_time(struct pevent *pevent, struct trace_seq *s, p = 9; } else { usecs = (nsecs + 500) / NSECS_PER_USEC; + /* To avoid usecs larger than 1 sec */ + if (usecs >= 1000000) { + usecs -= 1000000; + secs++; + } p = 6; }
