linux-kernel - [PATCH 35/48] perf tools: Add threads debug variable

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Date:   Thu, 13 Sep 2018 14:54:37 +0200
From:   Jiri Olsa <jolsa@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     lkml <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Andi Kleen <andi@...stfloor.org>,
        Alexey Budankov <alexey.budankov@...ux.intel.com>
Subject: [PATCH 35/48] perf tools: Add threads debug variable

To separate thread debug messages from global verbose,
to enable type:

  $ perf --debug threads=X record ...

where X is the debug level.

Link: http://lkml.kernel.org/n/tip-tgpv7s1pjnxgfw7c90mg5tpl@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
 tools/perf/Documentation/perf.txt | 1 +
 tools/perf/util/debug.c           | 2 ++
 tools/perf/util/debug.h           | 1 +
 3 files changed, 4 insertions(+)

diff --git a/tools/perf/Documentation/perf.txt b/tools/perf/Documentation/perf.txt
index 864e37597252..5ae38692af64 100644
--- a/tools/perf/Documentation/perf.txt
+++ b/tools/perf/Documentation/perf.txt
@@ -22,6 +22,7 @@ OPTIONS
 	  verbose          - general debug messages
 	  ordered-events   - ordered events object debug messages
 	  data-convert     - data convert command debug messages
+	  threads          - threads debug/stats messages
 
 --buildid-dir::
 	Setup buildid cache directory. It has higher priority than
diff --git a/tools/perf/util/debug.c b/tools/perf/util/debug.c
index 3d6459626c2a..10425630cb71 100644
--- a/tools/perf/util/debug.c
+++ b/tools/perf/util/debug.c
@@ -28,6 +28,7 @@ bool dump_trace = false, quiet = false;
 int debug_ordered_events;
 static int redirect_to_stderr;
 int debug_data_convert;
+int debug_threads;
 
 int veprintf(int level, int var, const char *fmt, va_list args)
 {
@@ -180,6 +181,7 @@ static struct debug_variable {
 	{ .name = "ordered-events",	.ptr = &debug_ordered_events},
 	{ .name = "stderr",		.ptr = &redirect_to_stderr},
 	{ .name = "data-convert",	.ptr = &debug_data_convert },
+	{ .name = "threads",		.ptr = &debug_threads },
 	{ .name = NULL, }
 };
 
diff --git a/tools/perf/util/debug.h b/tools/perf/util/debug.h
index 77445dfc5c7d..96665c66057b 100644
--- a/tools/perf/util/debug.h
+++ b/tools/perf/util/debug.h
@@ -15,6 +15,7 @@ extern int verbose;
 extern bool quiet, dump_trace;
 extern int debug_ordered_events;
 extern int debug_data_convert;
+extern int debug_threads;
 
 #ifndef pr_fmt
 #define pr_fmt(fmt) fmt
-- 
2.17.1