linux-kernel - [PATCH 08/26] perf tools: Save callchain info for each cumulative entry

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Date:	Fri, 23 May 2014 19:04:05 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Jiri Olsa <jolsa@...hat.com>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...nel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Namhyung Kim <namhyung.kim@....com>,
	Namhyung Kim <namhyung@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Andi Kleen <andi@...stfloor.org>, Arun Sharma <asharma@...com>,
	Rodrigo Campos <rodrigo@...g.com.ar>
Subject: [PATCH 08/26] perf tools: Save callchain info for each cumulative entry

When accumulating callchain entry, also save current snapshot of the
chain so that it can show the rest of the chain.

Tested-by: Arun Sharma <asharma@...com>
Tested-by: Rodrigo Campos <rodrigo@...g.com.ar>
Acked-by: Jiri Olsa <jolsa@...hat.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/util/hist.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index b3faabf3d2c2..de13f0a12940 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -741,6 +741,14 @@ iter_add_single_cumulative_entry(struct hist_entry_iter *iter,
 	iter->he = he;
 	he_cache[iter->curr++] = he;
 
+	callchain_append(he->callchain, &callchain_cursor, sample->period);
+
+	/*
+	 * We need to re-initialize the cursor since callchain_append()
+	 * advanced the cursor to the end.
+	 */
+	callchain_cursor_commit(&callchain_cursor);
+
 	return hist_entry__inc_addr_samples(he, evsel->idx, al->addr);
 }
 
@@ -754,8 +762,6 @@ iter_next_cumulative_entry(struct hist_entry_iter *iter,
 	if (node == NULL)
 		return 0;
 
-	callchain_cursor_advance(&callchain_cursor);
-
 	return fill_callchain_info(al, node, iter->hide_unresolved);
 }
 
@@ -779,6 +785,11 @@ iter_add_next_cumulative_entry(struct hist_entry_iter *iter,
 		.parent = iter->parent,
 	};
 	int i;
+	struct callchain_cursor cursor;
+
+	callchain_cursor_snapshot(&cursor, &callchain_cursor);
+
+	callchain_cursor_advance(&callchain_cursor);
 
 	/*
 	 * Check if there's duplicate entries in the callchain.
@@ -797,6 +808,8 @@ iter_add_next_cumulative_entry(struct hist_entry_iter *iter,
 
 	he_cache[iter->curr++] = he;
 
+	callchain_append(he->callchain, &cursor, sample->period);
+
 	return hist_entry__inc_addr_samples(he, evsel->idx, al->addr);
 }
 
-- 
1.9.2

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