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Message-Id: <1420731408-8631-3-git-send-email-acme@kernel.org>
Date: Thu, 8 Jan 2015 12:36:47 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Ingo Molnar <mingo@...nel.org>
Cc: linux-kernel@...r.kernel.org, Namhyung Kim <namhyung@...nel.org>,
David Ahern <dsahern@...il.com>,
Frederic Weisbecker <fweisbec@...il.com>,
Ingo Molnar <mingo@...hat.com>,
Markus Trippelsdorf <markus@...ppelsdorf.de>,
Paul Mackerras <paulus@...ba.org>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH 2/3] perf callchain: Free callchains when hist entries are deleted
From: Namhyung Kim <namhyung@...nel.org>
Markus reported that "perf top -g" can leak ~300MB per second on his
machine. This is partly because it missed to free callchains when hist
entries are deleted. Fix it.
Reported-by: Markus Trippelsdorf <markus@...ppelsdorf.de>
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
Cc: David Ahern <dsahern@...il.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Markus Trippelsdorf <markus@...ppelsdorf.de>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Link: http://lkml.kernel.org/r/20141230053813.GD6081@sejong
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
tools/perf/util/callchain.c | 30 ++++++++++++++++++++++++++++++
tools/perf/util/callchain.h | 2 ++
tools/perf/util/hist.c | 1 +
3 files changed, 33 insertions(+)
diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c
index 64b377e591e4..14e7a123d43b 100644
--- a/tools/perf/util/callchain.c
+++ b/tools/perf/util/callchain.c
@@ -841,3 +841,33 @@ char *callchain_list__sym_name(struct callchain_list *cl,
return bf;
}
+
+static void free_callchain_node(struct callchain_node *node)
+{
+ struct callchain_list *list, *tmp;
+ struct callchain_node *child;
+ struct rb_node *n;
+
+ list_for_each_entry_safe(list, tmp, &node->val, list) {
+ list_del(&list->list);
+ free(list);
+ }
+
+ n = rb_first(&node->rb_root_in);
+ while (n) {
+ child = container_of(n, struct callchain_node, rb_node_in);
+ n = rb_next(n);
+ rb_erase(&child->rb_node_in, &node->rb_root_in);
+
+ free_callchain_node(child);
+ free(child);
+ }
+}
+
+void free_callchain(struct callchain_root *root)
+{
+ if (!symbol_conf.use_callchain)
+ return;
+
+ free_callchain_node(&root->node);
+}
diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h
index dbc08cf5f970..c0ec1acc38e4 100644
--- a/tools/perf/util/callchain.h
+++ b/tools/perf/util/callchain.h
@@ -198,4 +198,6 @@ static inline int arch_skip_callchain_idx(struct thread *thread __maybe_unused,
char *callchain_list__sym_name(struct callchain_list *cl,
char *bf, size_t bfsize, bool show_dso);
+void free_callchain(struct callchain_root *root);
+
#endif /* __PERF_CALLCHAIN_H */
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 0ced178ce306..182395546ddc 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -947,6 +947,7 @@ void hist_entry__free(struct hist_entry *he)
zfree(&he->mem_info);
zfree(&he->stat_acc);
free_srcline(he->srcline);
+ free_callchain(he->callchain);
free(he);
}
--
1.9.3
--
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