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Message-Id: <1485489379-13723-1-git-send-email-treeze.taeung@gmail.com>
Date: Fri, 27 Jan 2017 12:56:19 +0900
From: Taeung Song <treeze.taeung@...il.com>
To: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: linux-kernel@...r.kernel.org, Jiri Olsa <jolsa@...nel.org>,
Namhyung Kim <namhyung@...nel.org>,
Ingo Molnar <mingo@...nel.org>,
Peter Zijlstra <peterz@...radead.org>,
Wang Nan <wangnan0@...wei.com>,
Taeung Song <treeze.taeung@...il.com>
Subject: [PATCH] perf ftrace: Add ftrace.tracer config option
Currently perf ftrace command will select 'function_graph' or 'function'.
So add ftrace.tracer config option to select tracer
# cat ~/.perfconfig
[ftrace]
tracer = function
# perf ftrace usleep 123456 | head -10
<...>-14450 [002] d... 10089.284231: finish_task_switch <-__schedule
<...>-14450 [002] .... 10089.284232: finish_wait <-pipe_wait
<...>-14450 [002] .... 10089.284232: mutex_lock <-pipe_wait
<...>-14450 [002] .... 10089.284232: _cond_resched <-mutex_lock
<...>-14450 [002] .... 10089.284233: generic_pipe_buf_confirm <-pipe_read
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Signed-off-by: Taeung Song <treeze.taeung@...il.com>
---
tools/perf/builtin-ftrace.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c
index 414444d..00e228f 100644
--- a/tools/perf/builtin-ftrace.c
+++ b/tools/perf/builtin-ftrace.c
@@ -17,6 +17,7 @@
#include "evlist.h"
#include "target.h"
#include "thread_map.h"
+#include "util/config.h"
#define DEFAULT_TRACER "function_graph"
@@ -198,6 +199,26 @@ static int __cmd_ftrace(struct perf_ftrace *ftrace, int argc, const char **argv)
return done ? 0 : -1;
}
+static int perf_ftrace_config(const char *var, const char *value, void *cb)
+{
+ struct perf_ftrace *ftrace = cb;
+
+ if (!strcmp(var, "ftrace.tracer")) {
+ if (!strcmp(value, "function_graph"))
+ ftrace->tracer = DEFAULT_TRACER;
+ else if (!strcmp(value, "function"))
+ ftrace->tracer = "function";
+ else {
+ pr_err("Please select function_graph(default)"
+ "or function to use tracer.\n");
+ return -1;
+ }
+ return 0;
+ }
+
+ return 0;
+}
+
int cmd_ftrace(int argc, const char **argv, const char *prefix __maybe_unused)
{
int ret;
@@ -218,6 +239,10 @@ int cmd_ftrace(int argc, const char **argv, const char *prefix __maybe_unused)
OPT_END()
};
+ ret = perf_config(perf_ftrace_config, &ftrace);
+ if (ret < 0)
+ return -1;
+
argc = parse_options(argc, argv, ftrace_options, ftrace_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
if (!argc)
--
2.7.4
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