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From:   Sasha Levin <Alexander.Levin@microsoft.com>
To:     "stable@vger.kernel.org" <stable@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
CC:     Jiri Olsa <jolsa@kernel.org>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Andi Kleen <ak@linux.intel.com>,
        David Ahern <dsahern@gmail.com>,
        Namhyung Kim <namhyung@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Arnaldo Carvalho de Melo <acme@redhat.com>,
        Sasha Levin <Alexander.Levin@microsoft.com>
Subject: [PATCH AUTOSEL for 4.14 125/161] perf record: Fix period option
 handling
Thread-Topic: [PATCH AUTOSEL for 4.14 125/161] perf record: Fix period option
 handling
Thread-Index: AQHTz5i4aE/9EYG0oEe6zzW+rK7y+A==
Date:   Mon, 9 Apr 2018 00:21:35 +0000
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From: Jiri Olsa <jolsa@kernel.org>

[ Upstream commit f290aa1ffa45ed7e37599840878b4dae68269ee1 ]

Stephan reported we don't unset PERIOD sample type when --no-period is
specified. Adding the unset check and reset PERIOD if --no-period is
specified.

Committer notes:

Check the sample_type, it shouldn't have PERF_SAMPLE_PERIOD there when
--no-period is used.

Before:

  # perf record --no-period sleep 1
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.018 MB perf.data (7 samples) ]
  # perf evlist -v
  cycles:ppp: size: 112, { sample_period, sample_freq }: 4000, sample_type:=
 IP|TID|TIME|PERIOD, disabled: 1, inherit: 1, mmap: 1, comm: 1, freq: 1, en=
able_on_exec: 1, task: 1, precise_ip: 3, sample_id_all: 1, exclude_guest: 1=
, mmap2: 1, comm_exec: 1
  #

After:

[root@jouet ~]# perf record --no-period sleep 1
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.019 MB perf.data (17 samples) ]
[root@jouet ~]# perf evlist -v
cycles:ppp: size: 112, { sample_period, sample_freq }: 4000, sample_type: I=
P|TID|TIME, disabled: 1, inherit: 1, mmap: 1, comm: 1, freq: 1, enable_on_e=
xec: 1, task: 1, precise_ip: 3, sample_id_all: 1, exclude_guest: 1, mmap2: =
1, comm_exec: 1
[root@jouet ~]#

Reported-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Tested-by: Stephane Eranian <eranian@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180201083812.11359-3-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
 tools/perf/builtin-record.c |  3 ++-
 tools/perf/perf.h           |  1 +
 tools/perf/util/evsel.c     | 11 ++++++++---
 3 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 0c95ffefb6cc..272ff4b5e80e 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -1611,7 +1611,8 @@ static struct option __record_options[] =3D {
 	OPT_BOOLEAN_SET('T', "timestamp", &record.opts.sample_time,
 			&record.opts.sample_time_set,
 			"Record the sample timestamps"),
-	OPT_BOOLEAN('P', "period", &record.opts.period, "Record the sample period=
"),
+	OPT_BOOLEAN_SET('P', "period", &record.opts.period, &record.opts.period_s=
et,
+			"Record the sample period"),
 	OPT_BOOLEAN('n', "no-samples", &record.opts.no_samples,
 		    "don't sample"),
 	OPT_BOOLEAN_SET('N', "no-buildid-cache", &record.no_buildid_cache,
diff --git a/tools/perf/perf.h b/tools/perf/perf.h
index f75f3dec7485..55086389fc06 100644
--- a/tools/perf/perf.h
+++ b/tools/perf/perf.h
@@ -50,6 +50,7 @@ struct record_opts {
 	bool	     sample_time_set;
 	bool	     sample_cpu;
 	bool	     period;
+	bool	     period_set;
 	bool	     running_time;
 	bool	     full_auxtrace;
 	bool	     auxtrace_snapshot_mode;
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 4c31a22bbaa0..7c335d84becf 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -943,9 +943,6 @@ void perf_evsel__config(struct perf_evsel *evsel, struc=
t record_opts *opts,
 	if (target__has_cpu(&opts->target) || opts->sample_cpu)
 		perf_evsel__set_sample_bit(evsel, CPU);
=20
-	if (opts->period)
-		perf_evsel__set_sample_bit(evsel, PERIOD);
-
 	/*
 	 * When the user explicitly disabled time don't force it here.
 	 */
@@ -1047,6 +1044,14 @@ void perf_evsel__config(struct perf_evsel *evsel, st=
ruct record_opts *opts,
 	apply_config_terms(evsel, opts);
=20
 	evsel->ignore_missing_thread =3D opts->ignore_missing_thread;
+
+	/* The --period option takes the precedence. */
+	if (opts->period_set) {
+		if (opts->period)
+			perf_evsel__set_sample_bit(evsel, PERIOD);
+		else
+			perf_evsel__reset_sample_bit(evsel, PERIOD);
+	}
 }
=20
 static int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int n=
threads)
--=20
2.15.1