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From: Jiri Olsa <jolsa@kernel.org>
To: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Kan Liang <kan.liang@intel.com>,
	lkml <linux-kernel@vger.kernel.org>,
	Ingo Molnar <mingo@kernel.org>,
	Namhyung Kim <namhyung@kernel.org>,
	David Ahern <dsahern@gmail.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: [PATCH 5/9] perf tools: Disable write_backward for leader sampling group events
Date: Mon, 23 Apr 2018 11:08:19 +0200
Message-ID: <20180423090823.32309-6-jolsa@kernel.org> (raw)
In-Reply-To: <20180423090823.32309-1-jolsa@kernel.org>

.. and other related fields that do not need to be enabled
for events that have sampling leader.

It fixes the perf top usage Ingo reported broken:

  # perf top -e '{cycles,msr/aperf/}:S'

The msr/aperf/ is configured for write_back sampling, which
is not allowed by msr pmu, so it fails to create the event.

Adjusting related attr test.

Reported-by: Ingo Molnar <mingo@kernel.org>
Cc: Kan Liang <kan.liang@intel.com>
Link: http://lkml.kernel.org/n/tip-bh7wxrci19km6iwbv4qg555o@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
 tools/perf/tests/attr/test-record-group-sampling | 3 +++
 tools/perf/util/evsel.c                          | 7 +++++--
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/tools/perf/tests/attr/test-record-group-sampling b/tools/perf/tests/attr/test-record-group-sampling
index f906b793196f..8a33ca4f9e1f 100644
--- a/tools/perf/tests/attr/test-record-group-sampling
+++ b/tools/perf/tests/attr/test-record-group-sampling
@@ -35,3 +35,6 @@ inherit=0
 # sampling disabled
 sample_freq=0
 sample_period=0
+freq=0
+write_backward=0
+sample_id_all=0
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 7472f876cd70..81b7f1cdc956 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -930,8 +930,11 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts,
 	 * than leader in case leader 'leads' the sampling.
 	 */
 	if ((leader != evsel) && leader->sample_read) {
-		attr->sample_freq   = 0;
-		attr->sample_period = 0;
+		attr->freq           = 0;
+		attr->sample_freq    = 0;
+		attr->sample_period  = 0;
+		attr->write_backward = 0;
+		attr->sample_id_all  = 0;
 	}
 
 	if (opts->no_samples)
-- 
2.13.6

  parent reply index

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-23  9:08 [PATCH 0/9] perf tools: Assorted fixes Jiri Olsa
2018-04-23  9:08 ` [PATCH 1/9] perf check-headers.sh: Simplify arguments passing Jiri Olsa
2018-05-02 17:40   ` [tip:perf/core] " tip-bot for Jiri Olsa
2018-04-23  9:08 ` [PATCH 2/9] perf check-headers.sh: Add support to check 2 independent files Jiri Olsa
2018-04-23 14:28   ` Arnaldo Carvalho de Melo
2018-05-02 17:41   ` [tip:perf/core] " tip-bot for Jiri Olsa
2018-04-23  9:08 ` [PATCH 3/9] perf stat: Keep the / modifier separator in fallback Jiri Olsa
2018-04-23 14:16   ` Arnaldo Carvalho de Melo
2018-04-26  5:53   ` [tip:perf/urgent] " tip-bot for Jiri Olsa
2018-04-23  9:08 ` [PATCH 4/9] perf tools: Fix pmu events parsing rule Jiri Olsa
2018-04-23 14:20   ` Arnaldo Carvalho de Melo
2018-04-23 14:25     ` Jiri Olsa
2018-04-26  5:54   ` [tip:perf/urgent] perf pmu: " tip-bot for Jiri Olsa
2018-04-23  9:08 ` Jiri Olsa [this message]
2018-04-23 14:23   ` [PATCH 5/9] perf tools: Disable write_backward for leader sampling group events Arnaldo Carvalho de Melo
2018-04-26  5:54   ` [tip:perf/urgent] perf evsel: " tip-bot for Jiri Olsa
2018-04-23  9:08 ` [PATCH 6/9] perf stat: Display time in precision based on std deviation Jiri Olsa
2018-04-23 14:40   ` Arnaldo Carvalho de Melo
2018-05-02 17:41   ` [tip:perf/core] " tip-bot for Jiri Olsa
2018-04-23  9:08 ` [PATCH 7/9] perf stat: Add --table option to display time of each run Jiri Olsa
2018-04-23 14:41   ` Arnaldo Carvalho de Melo
2018-04-23 15:29     ` Jiri Olsa
2018-05-02 17:42   ` [tip:perf/core] " tip-bot for Jiri Olsa
2018-04-23  9:08 ` [PATCH 8/9] perf stat: Display length strings of each run for --table option Jiri Olsa
2018-05-02 17:42   ` [tip:perf/core] " tip-bot for Jiri Olsa
2018-04-23  9:08 ` [PATCH 9/9] perf stat: Display user and system time Jiri Olsa
2018-04-23 14:51   ` Arnaldo Carvalho de Melo
2018-04-23 15:30     ` Jiri Olsa
2018-04-23 18:48 ` [PATCH 0/9] perf tools: Assorted fixes Arnaldo Carvalho de Melo

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