linux-kernel - [PATCH 4/7] perf hist: Initialize hierachy tree explicitly

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Date:   Mon, 12 Sep 2016 15:19:55 +0900
From:   Namhyung Kim <namhyung@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Jiri Olsa <jolsa@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Andi Kleen <andi@...stfloor.org>
Subject: [PATCH 4/7] perf hist: Initialize hierachy tree explicitly

The hroot_in and hroot_out are root of hiearchy tree of hist entry.  But
as hist entry is initialized by copying existing template entry, it
sometimes has non-empty tree and copied it incorrectly.  This is a
problem especially when event group is used since it creates dummy
entries from already-processed entries in other event members.

Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/util/hist.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 702ba3a8ead6..37a08f20730a 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -417,6 +417,8 @@ static int hist_entry__init(struct hist_entry *he,
 	}
 	INIT_LIST_HEAD(&he->pairs.node);
 	thread__get(he->thread);
+	he->hroot_in  = RB_ROOT;
+	he->hroot_out = RB_ROOT;
 
 	if (!symbol_conf.report_hierarchy)
 		he->leaf = true;
-- 
2.9.3