linux-kernel - [tip:perf/core] perf hist: Initialize hierarchy tree explicitly

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Date:   Tue, 20 Sep 2016 14:40:18 -0700
From:   tip-bot for Namhyung Kim <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     jolsa@...nel.org, a.p.zijlstra@...llo.nl, mingo@...nel.org,
        namhyung@...nel.org, acme@...hat.com, linux-kernel@...r.kernel.org,
        andi@...stfloor.org, hpa@...or.com, tglx@...utronix.de
Subject: [tip:perf/core] perf hist: Initialize hierarchy tree explicitly

Commit-ID:  d2580c7a5b4e78bffda1e53cfd583e7a2c7383a5
Gitweb:     http://git.kernel.org/tip/d2580c7a5b4e78bffda1e53cfd583e7a2c7383a5
Author:     Namhyung Kim <namhyung@...nel.org>
AuthorDate: Tue, 13 Sep 2016 16:45:48 +0900
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Tue, 13 Sep 2016 16:36:46 -0300

perf hist: Initialize hierarchy tree explicitly

The hroot_in and hroot_out are roots of hierarchy trees of hist entries.

But when a hist entry is initialized by copying existing template entry,
it sometimes has non-empty tree and copies it incorrectly.  This is a
problem especially when an 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>
Cc: Andi Kleen <andi@...stfloor.org>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Link: http://lkml.kernel.org/r/20160913074552.13284-4-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 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 702ba3a..37a08f2 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;