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Message-ID: <tip-82162b5ae3d152fd7d887b36213f5b6785fe1294@git.kernel.org>
Date: Thu, 14 Aug 2014 01:48:54 -0700
From: tip-bot for Namhyung Kim <tipbot@...or.com>
To: linux-tip-commits@...r.kernel.org
Cc: acme@...hat.com, linux-kernel@...r.kernel.org, paulus@...ba.org,
hpa@...or.com, mingo@...nel.org, andi@...stfloor.org,
a.p.zijlstra@...llo.nl, namhyung.kim@....com, namhyung@...nel.org,
jolsa@...hat.com, fweisbec@...il.com, tglx@...utronix.de
Subject: [tip:perf/core] perf hists browser:
Fix a small callchain display bug
Commit-ID: 82162b5ae3d152fd7d887b36213f5b6785fe1294
Gitweb: http://git.kernel.org/tip/82162b5ae3d152fd7d887b36213f5b6785fe1294
Author: Namhyung Kim <namhyung@...nel.org>
AuthorDate: Wed, 13 Aug 2014 15:02:41 +0900
Committer: Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Wed, 13 Aug 2014 17:12:56 -0300
perf hists browser: Fix a small callchain display bug
The currently when perf TUI report shows callchain, the first level
chains have bogus '+' sign even though only the last one has children.
Since they are on a single line of the chain, toggling intermediate
entries has no effect. Fix it to show '+' sign at the last entry only.
Note that non-first level callchain entries don't have this problem.
Before:
---------------------------------------------------------------------------
Children Self Command Shared Object Symbols
- 40.70% 0.00% swapper [kernel.kallsyms] [k] cpuidle_wrap_enter
+ cpuidle_wrap_enter
+ cpuidle_enter_tk
+ cpuidle_idle_call
+ cpu_idle
After:
---------------------------------------------------------------------------
Children Self Command Shared Object Symbols
- 40.70% 0.00% swapper [kernel.kallsyms] [k] cpuidle_wrap_enter
cpuidle_wrap_enter
cpuidle_enter_tk
cpuidle_idle_call
+ cpu_idle
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
Acked-by: Ingo Molnar <mingo@...nel.org>
Cc: Andi Kleen <andi@...stfloor.org>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Namhyung Kim <namhyung.kim@....com>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Link: http://lkml.kernel.org/r/1407909761-10822-1-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
tools/perf/ui/browsers/hists.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index 045c1e1..1818d12 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -228,8 +228,10 @@ static void callchain_node__init_have_children(struct callchain_node *node)
{
struct callchain_list *chain;
- list_for_each_entry(chain, &node->val, list)
+ if (!list_empty(&node->val)) {
+ chain = list_entry(node->val.prev, struct callchain_list, list);
chain->ms.has_children = !RB_EMPTY_ROOT(&node->rb_root);
+ }
callchain_node__init_have_children_rb_tree(node);
}
--
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