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 <rainboy1215@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Link: http://lkml.kernel.org/r/20160209204236.824426460@goodmis.org [ fixed incrementing "secs" instead of decrementing it ] Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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@ -5429,6 +5429,11 @@ void pevent_print_event_time(struct pevent *pevent, struct trace_seq *s,
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p = 9;
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} else {
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usecs = (nsecs + 500) / NSECS_PER_USEC;
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/* To avoid usecs larger than 1 sec */
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if (usecs >= 1000000) {
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usecs -= 1000000;
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secs++;
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}
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p = 6;
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}
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