linux-kernel - [PATCH 13/19] perf tool: Skip symbols in exclude list while printing callchain

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Message-Id: <1375930261-77273-14-git-send-email-dsahern@gmail.com>
Date:	Wed,  7 Aug 2013 22:50:55 -0400
From:	David Ahern <dsahern@...il.com>
To:	acme@...stprotocols.net, linux-kernel@...r.kernel.org,
	mingo@...nel.org
Cc:	David Ahern <dsahern@...il.com>, Jiri Olsa <jolsa@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Stephane Eranian <eranian@...gle.com>
Subject: [PATCH 13/19] perf tool: Skip symbols in exclude list while printing callchain

Leverage new exclude symbol list to allow user to not see certain functions
in a backtrace. For example repeating patterns like:
    do_select  core_sys_select  sys_select
can be reduced to just sys_select when dumping callchains, consuming less
real estate on the screen while still conveying the essential message - the
process is in a select call.

Signed-off-by: David Ahern <dsahern@...il.com>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Stephane Eranian <eranian@...gle.com>
---
 tools/perf/util/session.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 5a89964..0eada12 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1522,6 +1522,9 @@ void perf_evsel__print_ip(struct perf_evsel *evsel, union perf_event *event,
 			if (!node)
 				break;
 
+			if (symbol__is_excluded(node->sym))
+				goto next;
+
 			if (print_ip)
 				printf("%c%16" PRIx64, s, node->ip);
 
@@ -1543,9 +1546,10 @@ void perf_evsel__print_ip(struct perf_evsel *evsel, union perf_event *event,
 			if (!print_oneline)
 				printf("\n");
 
-			callchain_cursor_advance(&callchain_cursor);
-
 			stack_depth--;
+
+next:
+			callchain_cursor_advance(&callchain_cursor);
 		}
 
 	} else {
-- 
1.7.10.1

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