[PATCH v2 3/3] perf test: Add stat uniquifying test
From: Chun-Tse Shao
Date: Thu Mar 27 2025 - 19:01:10 EST
The `stat+uniquify.sh` test retrieves all uniquified `clockticks` events
from `perf list -v clockticks` and check if `perf stat -e clockticks -A`
contains all of them.
Signed-off-by: Chun-Tse Shao <ctshao@xxxxxxxxxx>
---
.../tests/shell/stat+event_uniquifying.sh | 69 +++++++++++++++++++
1 file changed, 69 insertions(+)
create mode 100755 tools/perf/tests/shell/stat+event_uniquifying.sh
diff --git a/tools/perf/tests/shell/stat+event_uniquifying.sh b/tools/perf/tests/shell/stat+event_uniquifying.sh
new file mode 100755
index 000000000000..5ec35c52b7d9
--- /dev/null
+++ b/tools/perf/tests/shell/stat+event_uniquifying.sh
@@ -0,0 +1,69 @@
+#!/bin/bash
+# perf stat events uniquifying
+# SPDX-License-Identifier: GPL-2.0
+
+set -e
+
+stat_output=$(mktemp /tmp/__perf_test.stat_output.XXXXX)
+perf_tool=perf
+err=0
+
+test_event_uniquifying() {
+ # We use `clockticks` to verify the uniquify behavior.
+ event="clockticks"
+
+ # If the `-A` option is added, the event should be uniquified.
+ #
+ # $perf list -v clockticks
+ #
+ # List of pre-defined events (to be used in -e or -M):
+ #
+ # uncore_imc_0/clockticks/ [Kernel PMU event]
+ # uncore_imc_1/clockticks/ [Kernel PMU event]
+ # uncore_imc_2/clockticks/ [Kernel PMU event]
+ # uncore_imc_3/clockticks/ [Kernel PMU event]
+ # uncore_imc_4/clockticks/ [Kernel PMU event]
+ # uncore_imc_5/clockticks/ [Kernel PMU event]
+ #
+ # ...
+ #
+ # $perf stat -e clockticks -A -- true
+ #
+ # Performance counter stats for 'system wide':
+ #
+ # CPU0 3,773,018 uncore_imc_0/clockticks/
+ # CPU0 3,609,025 uncore_imc_1/clockticks/
+ # CPU0 0 uncore_imc_2/clockticks/
+ # CPU0 3,230,009 uncore_imc_3/clockticks/
+ # CPU0 3,049,897 uncore_imc_4/clockticks/
+ # CPU0 0 uncore_imc_5/clockticks/
+ #
+ # 0.002029828 seconds time elapsed
+
+ echo "stat event uniquifying test"
+ uniquified_event_array=()
+
+ # Check how many uniquified events.
+ while IFS= read -r line; do
+ uniquified_event=$(echo "$line" | awk '{print $1}')
+ uniquified_event_array+=("${uniquified_event}")
+ done < <(${perf_tool} list -v ${event} | grep "\[Kernel PMU event\]")
+
+ perf_command="${perf_tool} stat -e $event -A -o ${stat_output} -- true"
+ $perf_command
+
+ # Check the output contains all uniquified events.
+ for uniquified_event in "${uniquified_event_array[@]}"; do
+ if ! cat "${stat_output}" | grep -q "${uniquified_event}"; then
+ echo "Event is not uniquified [Failed]"
+ echo "${perf_command}"
+ cat "${stat_output}"
+ err=1
+ break
+ fi
+ done
+}
+
+test_event_uniquifying
+rm -f "${stat_output}"
+exit $err
--
2.49.0.472.ge94155a9ec-goog