linux-kernel - [tip:perf/core] perf record: Add readable output for callchain debug

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Message-ID: <tip-a601fdff1af20ea0208e918f5e97a247a3c37a40@git.kernel.org>
Date:	Sat, 22 Feb 2014 09:56:52 -0800
From:	tip-bot for Jiri Olsa <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@...nel.org, jolsa@...hat.com,
	adrian.hunter@...el.com, dsahern@...il.com, tglx@...utronix.de,
	cjashfor@...ux.vnet.ibm.com, mingo@...e.hu
Subject: [tip:perf/core] perf record:
  Add readable output for callchain debug

Commit-ID:  a601fdff1af20ea0208e918f5e97a247a3c37a40
Gitweb:     http://git.kernel.org/tip/a601fdff1af20ea0208e918f5e97a247a3c37a40
Author:     Jiri Olsa <jolsa@...hat.com>
AuthorDate: Mon, 3 Feb 2014 12:44:43 +0100
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Tue, 18 Feb 2014 09:34:47 -0300

perf record: Add readable output for callchain debug

Adding people readable output for callchain debug, to get following '-v'
output:

  $ perf record -v -g ls
  callchain: type DWARF
  callchain: stack dump size 4096
  ...

Signed-off-by: Jiri Olsa <jolsa@...hat.com>
Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Andi Kleen <andi@...stfloor.org>
Cc: Corey Ashford <cjashfor@...ux.vnet.ibm.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Link: http://lkml.kernel.org/r/1391427883-13443-3-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/builtin-record.c | 4 +++-
 tools/perf/perf.h           | 3 ++-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index be9e8bc..7b8f0e6 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -735,7 +735,9 @@ int record_parse_callchain(const char *arg, struct record_opts *opts)
 
 static void callchain_debug(struct record_opts *opts)
 {
-	pr_debug("callchain: type %d\n", opts->call_graph);
+	static const char *str[CALLCHAIN_MAX] = { "NONE", "FP", "DWARF" };
+
+	pr_debug("callchain: type %s\n", str[opts->call_graph]);
 
 	if (opts->call_graph == CALLCHAIN_DWARF)
 		pr_debug("callchain: stack dump size %d\n",
diff --git a/tools/perf/perf.h b/tools/perf/perf.h
index 2078f33..6898ad0 100644
--- a/tools/perf/perf.h
+++ b/tools/perf/perf.h
@@ -251,7 +251,8 @@ void pthread__unblock_sigwinch(void);
 enum perf_call_graph_mode {
 	CALLCHAIN_NONE,
 	CALLCHAIN_FP,
-	CALLCHAIN_DWARF
+	CALLCHAIN_DWARF,
+	CALLCHAIN_MAX
 };
 
 struct record_opts {
--
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