linux-kernel - [tip: perf/core] perf evsel: Rearrange perf_evsel__config_leader

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Date:   Wed, 22 Apr 2020 12:17:20 -0000
From:   "tip-bot2 for Adrian Hunter" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Adrian Hunter <adrian.hunter@...el.com>,
        Andi Kleen <ak@...ux.intel.com>, Jiri Olsa <jolsa@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        x86 <x86@...nel.org>, LKML <linux-kernel@...r.kernel.org>
Subject: [tip: perf/core] perf evsel: Rearrange perf_evsel__config_leader_sampling()

The following commit has been merged into the perf/core branch of tip:

Commit-ID:     3713eb371c873e6bed713d78f1bdd5e8be0764a3
Gitweb:        https://git.kernel.org/tip/3713eb371c873e6bed713d78f1bdd5e8be0764a3
Author:        Adrian Hunter <adrian.hunter@...el.com>
AuthorDate:    Wed, 01 Apr 2020 13:16:11 +03:00
Committer:     Arnaldo Carvalho de Melo <acme@...hat.com>
CommitterDate: Sat, 18 Apr 2020 09:05:00 -03:00

perf evsel: Rearrange perf_evsel__config_leader_sampling()

In preparation for adding support for leader sampling with AUX area events.

Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
Cc: Andi Kleen <ak@...ux.intel.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Link: http://lore.kernel.org/lkml/20200401101613.6201-15-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/record.c | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/tools/perf/util/record.c b/tools/perf/util/record.c
index 8870ae4..32aeeb8 100644
--- a/tools/perf/util/record.c
+++ b/tools/perf/util/record.c
@@ -172,24 +172,24 @@ static void perf_evsel__config_leader_sampling(struct evsel *evsel)
 	struct perf_event_attr *attr = &evsel->core.attr;
 	struct evsel *leader = evsel->leader;
 
+	if (leader == evsel || !leader->sample_read)
+		return;
+
 	/*
 	 * Disable sampling for all group members other
 	 * than leader in case leader 'leads' the sampling.
 	 */
-	if (leader != evsel && leader->sample_read) {
-		attr->freq           = 0;
-		attr->sample_freq    = 0;
-		attr->sample_period  = 0;
-		attr->write_backward = 0;
+	attr->freq           = 0;
+	attr->sample_freq    = 0;
+	attr->sample_period  = 0;
+	attr->write_backward = 0;
 
-		/*
-		 * We don't get sample for slave events, we make them
-		 * when delivering group leader sample. Set the slave
-		 * event to follow the master sample_type to ease up
-		 * report.
-		 */
-		attr->sample_type = leader->core.attr.sample_type;
-	}
+	/*
+	 * We don't get a sample for slave events, we make them when delivering
+	 * the group leader sample. Set the slave event to follow the master
+	 * sample_type to ease up reporting.
+	 */
+	attr->sample_type = leader->core.attr.sample_type;
 }
 
 void perf_evlist__config(struct evlist *evlist, struct record_opts *opts,