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| author | Chaos.Chen <rainboy1215@gmail.com> | 2016-02-09 21:40:14 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-03-03 15:10:37 +0100 |
| commit | 21a30100453516004905d4d5f0806ebaffa95131 (patch) | |
| tree | 81200b0f539f94c8f71efe192cb6e41176d20743 /tools/lib | |
| parent | perf script: Fix double free on command_line (diff) | |
| download | linux-21a30100453516004905d4d5f0806ebaffa95131.tar.xz linux-21a30100453516004905d4d5f0806ebaffa95131.zip | |
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>
Diffstat (limited to 'tools/lib')
| -rw-r--r-- | tools/lib/traceevent/event-parse.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c index 9a1e48afcf89..ce59f4891fa2 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; } |