perf time-utils: Prevent percentage time range overlap

Prevent percentage time range overlap. This is only a 1 nanosecond
change but makes the results more logical e.g. a sample cannot be in
both the first 10% and the second 20%.

Note, there is a later patch that adds a test for time-utils.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/20190604130017.31207-15-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/time-utils.c b/tools/perf/util/time-utils.c
index 69441fa..3e87c21 100644 (file)
--- a/tools/perf/util/time-utils.c
+++ b/tools/perf/util/time-utils.c
@@ -148,6 +148,9 @@ static int set_percent_time(struct perf_time_interval *ptime, double start_pcnt,
        ptime->start = start + round(start_pcnt * total);
        ptime->end = start + round(end_pcnt * total);
 
+       if (ptime->end > ptime->start && ptime->end != end)
+               ptime->end -= 1;
+
        return 0;
 }