linux-kernel - [PATCH 5/5] perf test: Improve perf lock contention test

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Date:   Wed,  6 Sep 2023 10:49:03 -0700
From:   Namhyung Kim <namhyung@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...nel.org>
Cc:     Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-perf-users@...r.kernel.org, Song Liu <song@...nel.org>,
        Hao Luo <haoluo@...gle.com>, bpf@...r.kernel.org
Subject: [PATCH 5/5] perf test: Improve perf lock contention test

Add cgroup aggregation and filter tests.

  $ sudo ./perf test -v contention
   84: kernel lock contention analysis test                            :
  --- start ---
  test child forked, pid 222423
  Testing perf lock record and perf lock contention
  Testing perf lock contention --use-bpf
  Testing perf lock record and perf lock contention at the same time
  Testing perf lock contention --threads
  Testing perf lock contention --lock-addr
  Testing perf lock contention --lock-cgroup
  Testing perf lock contention --type-filter (w/ spinlock)
  Testing perf lock contention --lock-filter (w/ tasklist_lock)
  Testing perf lock contention --callstack-filter (w/ unix_stream)
  Testing perf lock contention --callstack-filter with task aggregation
  Testing perf lock contention --cgroup-filter
  Testing perf lock contention CSV output
  test child finished with 0
  ---- end ----
  kernel lock contention analysis test: Ok

Reviewed-by: Ian Rogers <irogers@...gle.com>
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/tests/shell/lock_contention.sh | 45 +++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/tools/perf/tests/shell/lock_contention.sh b/tools/perf/tests/shell/lock_contention.sh
index d120e83db7d9..966e67db75f3 100755
--- a/tools/perf/tests/shell/lock_contention.sh
+++ b/tools/perf/tests/shell/lock_contention.sh
@@ -123,6 +123,24 @@ test_aggr_addr()
 	fi
 }
 
+test_aggr_cgroup()
+{
+	echo "Testing perf lock contention --lock-cgroup"
+
+	if ! perf lock con -b true > /dev/null 2>&1 ; then
+		echo "[Skip] No BPF support"
+		return
+	fi
+
+	# the perf lock contention output goes to the stderr
+	perf lock con -a -b -g -E 1 -q -- perf bench sched messaging > /dev/null 2> ${result}
+	if [ "$(cat "${result}" | wc -l)" != "1" ]; then
+		echo "[Fail] BPF result count is not 1:" "$(cat "${result}" | wc -l)"
+		err=1
+		exit
+	fi
+}
+
 test_type_filter()
 {
 	echo "Testing perf lock contention --type-filter (w/ spinlock)"
@@ -232,6 +250,31 @@ test_aggr_task_stack_filter()
 		exit
 	fi
 }
+test_cgroup_filter()
+{
+	echo "Testing perf lock contention --cgroup-filter"
+
+	if ! perf lock con -b true > /dev/null 2>&1 ; then
+		echo "[Skip] No BPF support"
+		return
+	fi
+
+	perf lock con -a -b -g -E 1 -F wait_total -q -- perf bench sched messaging > /dev/null 2> ${result}
+	if [ "$(cat "${result}" | wc -l)" != "1" ]; then
+		echo "[Fail] BPF result should have a cgroup result:" "$(cat "${result}")"
+		err=1
+		exit
+	fi
+
+	cgroup=$(cat "${result}" | awk '{ print $3 }')
+	perf lock con -a -b -g -E 1 -G "${cgroup}" -q -- perf bench sched messaging > /dev/null 2> ${result}
+	if [ "$(cat "${result}" | wc -l)" != "1" ]; then
+		echo "[Fail] BPF result should have a result with cgroup filter:" "$(cat "${cgroup}")"
+		err=1
+		exit
+	fi
+}
+
 
 test_csv_output()
 {
@@ -275,10 +318,12 @@ test_bpf
 test_record_concurrent
 test_aggr_task
 test_aggr_addr
+test_aggr_cgroup
 test_type_filter
 test_lock_filter
 test_stack_filter
 test_aggr_task_stack_filter
+test_cgroup_filter
 test_csv_output
 
 exit ${err}
-- 
2.42.0.283.g2d96d420d3-goog