linux-kernel - [PATCH 10/11] perf record: Add --output-dir option to store data in directory

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Date:   Tue, 26 Feb 2019 09:48:54 +0100
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>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Stephane Eranian <eranian@...gle.com>,
        Alexey Budankov <alexey.budankov@...ux.intel.com>
Subject: [PATCH 10/11] perf record: Add --output-dir option to store data in directory

Adding --output-dir option to mimic -o and --dir options.
following commands do the same:

  $ perf record -o perf.dir.data --dir ...
  $ perf record --output-dir perf.dir.data ...

User cannot use both -o and output-dir together,
error is displayed.

Link: http://lkml.kernel.org/n/tip-76ldd2ss6vjvlnjgwy7wxfzt@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
 tools/lib/subcmd/parse-options.h         |  4 ++++
 tools/perf/Documentation/perf-record.txt |  3 +++
 tools/perf/builtin-record.c              | 13 +++++++++++--
 3 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/tools/lib/subcmd/parse-options.h b/tools/lib/subcmd/parse-options.h
index af9def589863..8a3be77a3346 100644
--- a/tools/lib/subcmd/parse-options.h
+++ b/tools/lib/subcmd/parse-options.h
@@ -146,6 +146,10 @@ struct option {
 	  .value = check_vtype(v, const char **), .argh = (a), .help = (h), \
 	  .flags = PARSE_OPT_OPTARG, .defval = (intptr_t)(d), \
 	  .set = check_vtype(os, bool *)}
+#define OPT_STRING_SET(s, l, v, os, a, h) \
+	{ .type = OPTION_STRING, .short_name = (s), .long_name = (l), \
+	  .value = check_vtype(v, const char **), .argh = (a), .help = (h), \
+	  .set = check_vtype(os, bool *)}
 #define OPT_STRING_NOEMPTY(s, l, v, a, h)   { .type = OPTION_STRING,  .short_name = (s), .long_name = (l), .value = check_vtype(v, const char **), .argh = (a), .help = (h), .flags = PARSE_OPT_NOEMPTY}
 #define OPT_DATE(s, l, v, h) \
 	{ .type = OPTION_CALLBACK, .short_name = (s), .long_name = (l), .value = (v), .argh = "time", .help = (h), .callback = parse_opt_approxidate_cb }
diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt
index 445b7a4eb130..aac609887fb7 100644
--- a/tools/perf/Documentation/perf-record.txt
+++ b/tools/perf/Documentation/perf-record.txt
@@ -527,6 +527,9 @@ Implies --tail-synthesize.
 --dir::
 Store data into directory with one data file for cpu.
 
+--output-dir::
+Same as --dir option, can't be used together with -o option.
+
 SEE ALSO
 --------
 linkperf:perf-stat[1], linkperf:perf-list[1]
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 26981be13aa0..115316e94b34 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -80,6 +80,7 @@ struct record {
 	bool			buildid_all;
 	bool			timestamp_filename;
 	bool			timestamp_boundary;
+	bool			output_is_file;
 	struct switch_output	switch_output;
 	unsigned long long	samples;
 	cpu_set_t		affinity_mask;
@@ -1921,8 +1922,10 @@ static struct option __record_options[] = {
 	OPT_STRING('C', "cpu", &record.opts.target.cpu_list, "cpu",
 		    "list of cpus to monitor"),
 	OPT_U64('c', "count", &record.opts.user_interval, "event period to sample"),
-	OPT_STRING('o', "output", &record.data.path, "file",
-		    "output file name"),
+	OPT_STRING_SET('o', "output", &record.data.path, &record.output_is_file,
+		       "file", "output file name"),
+	OPT_STRING_SET(0, "output-dir", &record.data.path, &record.data.is_dir,
+		       "file", "output directory name"),
 	OPT_BOOLEAN_SET('i', "no-inherit", &record.opts.no_inherit,
 			&record.opts.no_inherit_set,
 			"child tasks do not inherit counters"),
@@ -2101,6 +2104,12 @@ int cmd_record(int argc, const char **argv)
 			"cgroup monitoring only available in system-wide mode");
 
 	}
+
+	if (perf_data__is_dir(&rec->data) && record.output_is_file) {
+		ui__error("cannot use both -o and --output-dir\n");
+		return -EINVAL;
+	}
+
 	if (rec->opts.record_switch_events &&
 	    !perf_can_record_switch_events()) {
 		ui__error("kernel does not support recording context switch events\n");
-- 
2.17.2