linux-kernel - [PATCH 14/19] perf time-utils: Prevent percentage time range overlap

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Message-Id: <20190604130017.31207-15-adrian.hunter@intel.com>
Date:   Tue,  4 Jun 2019 16:00:12 +0300
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Jiri Olsa <jolsa@...hat.com>, Jin Yao <yao.jin@...ux.intel.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 14/19] 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@...el.com>
---
 tools/perf/util/time-utils.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/perf/util/time-utils.c b/tools/perf/util/time-utils.c
index 69441faab3d0..3e87c21c293c 100644
--- 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;
 }
 
-- 
2.17.1