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Message-Id: <1372230862-15861-9-git-send-email-namhyung@kernel.org>
Date: Wed, 26 Jun 2013 16:14:11 +0900
From: Namhyung Kim <namhyung@...nel.org>
To: Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Paul Mackerras <paulus@...ba.org>,
Ingo Molnar <mingo@...nel.org>,
Namhyung Kim <namhyung.kim@....com>,
LKML <linux-kernel@...r.kernel.org>,
Steven Rostedt <rostedt@...dmis.org>,
Frederic Weisbecker <fweisbec@...il.com>,
Jiri Olsa <jolsa@...hat.com>, David Ahern <dsahern@...il.com>,
Stephane Eranian <eranian@...gle.com>
Subject: [PATCH 08/19] perf ftrace: Split "live" sub-command
From: Namhyung Kim <namhyung.kim@....com>
Separate out the default behavior to "live" subcommand. It's a
preparation to support more subcommands like "record" and "report".
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
tools/perf/builtin-ftrace.c | 109 +++++++++++++++++++++++++++-----------------
1 file changed, 68 insertions(+), 41 deletions(-)
diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c
index efe907e4bd56..4ec96413d3a5 100644
--- a/tools/perf/builtin-ftrace.c
+++ b/tools/perf/builtin-ftrace.c
@@ -170,7 +170,7 @@ static int reset_tracing_cpu(void)
return 0;
}
-static int __cmd_ftrace(struct perf_ftrace *ftrace, int argc, const char **argv)
+static int do_ftrace_live(struct perf_ftrace *ftrace)
{
char *trace_file;
int trace_fd;
@@ -179,11 +179,6 @@ static int __cmd_ftrace(struct perf_ftrace *ftrace, int argc, const char **argv)
.events = POLLIN,
};
- if (geteuid() != 0) {
- pr_err("ftrace only works for root!\n");
- return -1;
- }
-
signal(SIGINT, sig_handler);
signal(SIGUSR1, sig_handler);
signal(SIGCHLD, sig_handler);
@@ -195,12 +190,6 @@ static int __cmd_ftrace(struct perf_ftrace *ftrace, int argc, const char **argv)
if (write_tracing_file("trace", "0") < 0)
goto out;
- if (argc && perf_evlist__prepare_workload(ftrace->evlist,
- &ftrace->target,
- argv, false, true) < 0) {
- goto out;
- }
-
if (set_tracing_pid(ftrace) < 0) {
pr_err("failed to set ftrace pid\n");
goto out_reset;
@@ -273,61 +262,99 @@ out:
return done ? 0 : -1;
}
-int cmd_ftrace(int argc, const char **argv, const char *prefix __maybe_unused)
+static int
+__cmd_ftrace_live(struct perf_ftrace *ftrace, int argc, const char **argv)
{
- int ret;
- struct perf_ftrace ftrace = {
- .target = { .uid = UINT_MAX, },
- };
- const char * const ftrace_usage[] = {
- "perf ftrace [<options>] [<command>]",
- "perf ftrace [<options>] -- <command> [<options>]",
+ int ret = -1;
+ const char * const live_usage[] = {
+ "perf ftrace live [<options>] [<command>]",
+ "perf ftrace live [<options>] -- <command> [<options>]",
NULL
};
- const struct option ftrace_options[] = {
- OPT_STRING('t', "tracer", &ftrace.tracer, "tracer",
+ const struct option live_options[] = {
+ OPT_STRING('t', "tracer", &ftrace->tracer, "tracer",
"tracer to use"),
- OPT_STRING('p', "pid", &ftrace.target.tid, "pid",
+ OPT_STRING('p', "pid", &ftrace->target.tid, "pid",
"trace on existing process id"),
OPT_INCR('v', "verbose", &verbose,
"be more verbose"),
- OPT_BOOLEAN('a', "all-cpus", &ftrace.target.system_wide,
+ OPT_BOOLEAN('a', "all-cpus", &ftrace->target.system_wide,
"system-wide collection from all CPUs"),
- OPT_STRING('C', "cpu", &ftrace.target.cpu_list, "cpu",
+ OPT_STRING('C', "cpu", &ftrace->target.cpu_list, "cpu",
"list of cpus to monitor"),
OPT_END()
};
- argc = parse_options(argc, argv, ftrace_options, ftrace_usage,
- PARSE_OPT_STOP_AT_NON_OPTION);
- if (!argc && perf_target__none(&ftrace.target))
- usage_with_options(ftrace_usage, ftrace_options);
+ argc = parse_options(argc, argv, live_options, live_usage,
+ PARSE_OPT_STOP_AT_NON_OPTION);
+ if (!argc && perf_target__none(&ftrace->target))
+ usage_with_options(live_usage, live_options);
- ret = perf_target__validate(&ftrace.target);
+ ret = perf_target__validate(&ftrace->target);
if (ret) {
char errbuf[512];
- perf_target__strerror(&ftrace.target, ret, errbuf, 512);
+ perf_target__strerror(&ftrace->target, ret, errbuf, 512);
pr_err("%s\n", errbuf);
return -EINVAL;
}
- ftrace.evlist = perf_evlist__new();
- if (ftrace.evlist == NULL)
+ ftrace->evlist = perf_evlist__new();
+ if (ftrace->evlist == NULL)
return -ENOMEM;
- ret = perf_evlist__create_maps(ftrace.evlist, &ftrace.target);
+ ret = perf_evlist__create_maps(ftrace->evlist, &ftrace->target);
if (ret < 0)
- goto out_delete_evlist;
+ goto out;
- if (ftrace.tracer == NULL)
- ftrace.tracer = DEFAULT_TRACER;
+ if (ftrace->tracer == NULL)
+ ftrace->tracer = DEFAULT_TRACER;
- ret = __cmd_ftrace(&ftrace, argc, argv);
+ if (argc && perf_evlist__prepare_workload(ftrace->evlist,
+ &ftrace->target,
+ argv, false, true) < 0)
+ goto out_maps;
+
+ ret = do_ftrace_live(ftrace);
- perf_evlist__delete_maps(ftrace.evlist);
-out_delete_evlist:
- perf_evlist__delete(ftrace.evlist);
+out_maps:
+ perf_evlist__delete_maps(ftrace->evlist);
+out:
+ perf_evlist__delete(ftrace->evlist);
+
+ return ret;
+}
+
+int cmd_ftrace(int argc, const char **argv, const char *prefix __maybe_unused)
+{
+ int ret;
+ struct perf_ftrace ftrace = {
+ .target = { .uid = UINT_MAX, },
+ };
+ const char * const ftrace_usage[] = {
+ "perf ftrace {live} [<options>] [<command>]",
+ "perf ftrace {live} [<options>] -- <command> [<options>]",
+ NULL
+ };
+ const struct option ftrace_options[] = {
+ OPT_END()
+ };
+
+ argc = parse_options(argc, argv, ftrace_options, ftrace_usage,
+ PARSE_OPT_STOP_AT_NON_OPTION);
+ if (!argc)
+ usage_with_options(ftrace_usage, ftrace_options);
+
+ if (geteuid() != 0) {
+ pr_err("ftrace only works for root!\n");
+ return -1;
+ }
+
+ if (strcmp(argv[0], "live") == 0) {
+ ret = __cmd_ftrace_live(&ftrace, argc, argv);
+ } else {
+ usage_with_options(ftrace_usage, ftrace_options);
+ }
return ret;
}
--
1.7.11.7
--
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