netdev - [PATCH v2 3/5] perf test: Ensure sample

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Date:   Tue, 28 Jul 2020 01:57:32 -0700
From:   Ian Rogers <irogers@...gle.com>
To:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        Andrii Nakryiko <andriin@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...omium.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Athira Rajeev <atrajeev@...ux.vnet.ibm.com>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        bpf@...r.kernel.org
Cc:     Stephane Eranian <eranian@...gle.com>,
        Ian Rogers <irogers@...gle.com>
Subject: [PATCH v2 3/5] perf test: Ensure sample_period is set libpfm4 events

Test that a command line option doesn't override the period set on a
libpfm4 event.
Without libpfm4 test passes as unsupported.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/tests/attr/README                 | 1 +
 tools/perf/tests/attr/test-record-pfm-period | 9 +++++++++
 2 files changed, 10 insertions(+)
 create mode 100644 tools/perf/tests/attr/test-record-pfm-period

diff --git a/tools/perf/tests/attr/README b/tools/perf/tests/attr/README
index 430024f618f1..6cd408108595 100644
--- a/tools/perf/tests/attr/README
+++ b/tools/perf/tests/attr/README
@@ -53,6 +53,7 @@ Following tests are defined (with perf commands):
   perf record -i kill                           (test-record-no-inherit)
   perf record -n kill                           (test-record-no-samples)
   perf record -c 100 -P kill                    (test-record-period)
+  perf record -c 1 --pfm-events=cycles:period=2 (test-record-pfm-period)
   perf record -R kill                           (test-record-raw)
   perf stat -e cycles kill                      (test-stat-basic)
   perf stat kill                                (test-stat-default)
diff --git a/tools/perf/tests/attr/test-record-pfm-period b/tools/perf/tests/attr/test-record-pfm-period
new file mode 100644
index 000000000000..368f5b814094
--- /dev/null
+++ b/tools/perf/tests/attr/test-record-pfm-period
@@ -0,0 +1,9 @@
+[config]
+command = record
+args    = --no-bpf-event -c 10000 --pfm-events=cycles:period=77777 kill >/dev/null 2>&1
+ret     = 1
+
+[event:base-record]
+sample_period=77777
+sample_type=7
+freq=0
-- 
2.28.0.163.g6104cc2f0b6-goog