Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#!/bin/bash
2# perf stat events uniquifying
3# SPDX-License-Identifier: GPL-2.0
4
5set -e
6
7err=0
8stat_output=$(mktemp /tmp/__perf_test.stat_output.XXXXX)
9
10cleanup() {
11 rm -f "${stat_output}"
12
13 trap - EXIT TERM INT
14}
15
16trap_cleanup() {
17 echo "Unexpected signal in ${FUNCNAME[1]}"
18 cleanup
19 exit 1
20}
21trap trap_cleanup EXIT TERM INT
22
23test_event_uniquifying() {
24 echo "Uniquification of PMU sysfs events test"
25
26 # Read events from perf list with and without -v. With -v the duplicate PMUs
27 # aren't deduplicated. Note, json events are listed by perf list without a
28 # PMU.
29 read -ra pmu_events <<< "$(perf list --raw pmu)"
30 read -ra pmu_v_events <<< "$(perf list -v --raw pmu)"
31 # For all non-deduplicated events.
32 for pmu_v_event in "${pmu_v_events[@]}"; do
33 # If the event matches an event in the deduplicated events then it musn't
34 # be an event with duplicate PMUs, continue the outer loop.
35 for pmu_event in "${pmu_events[@]}"; do
36 if [[ "$pmu_v_event" == "$pmu_event" ]]; then
37 continue 2
38 fi
39 done
40 # Strip the suffix from the non-deduplicated event's PMU.
41 event=$(echo "$pmu_v_event" | sed -E 's/_[0-9]+//')
42 for pmu_event in "${pmu_events[@]}"; do
43 if [[ "$event" == "$pmu_event" ]]; then
44 echo "Testing event ${event} is uniquified to ${pmu_v_event}"
45 if ! perf stat -e "$event" -A -o ${stat_output} -- true; then
46 echo "Error running perf stat for event '$event' [Skip]"
47 if [ $err = 0 ]; then
48 err=2
49 fi
50 continue
51 fi
52 # Ensure the non-deduplicated event appears in the output.
53 if ! grep -q "${pmu_v_event}" "${stat_output}"; then
54 echo "Uniquification of PMU sysfs events test [Failed]"
55 cat "${stat_output}"
56 err=1
57 fi
58 break
59 fi
60 done
61 done
62}
63
64test_event_uniquifying
65cleanup
66exit $err