1#!/bin/sh
 2# perf stat --bpf-counters test
 3# SPDX-License-Identifier: GPL-2.0
 4
 5set -e
 6
 7# check whether $2 is within +/- 10% of $1
 8compare_number()
 9{
10       first_num=$1
11       second_num=$2
12
13       # upper bound is first_num * 110%
14       upper=$(expr $first_num + $first_num / 10 )
15       # lower bound is first_num * 90%
16       lower=$(expr $first_num - $first_num / 10 )
17
18       if [ $second_num -gt $upper ] || [ $second_num -lt $lower ]; then
19               echo "The difference between $first_num and $second_num are greater than 10%."
20               exit 1
21       fi
22}
23
24# skip if --bpf-counters is not supported
25if ! perf stat --bpf-counters true > /dev/null 2>&1; then
26	if [ "$1" = "-v" ]; then
27		echo "Skipping: --bpf-counters not supported"
28		perf --no-pager stat --bpf-counters true || true
29	fi
30	exit 2
31fi
32
33base_cycles=$(perf stat --no-big-num -e cycles -- perf bench sched messaging -g 1 -l 100 -t 2>&1 | awk '/cycles/ {print $1}')
34if [ "$base_cycles" == "<not" ]; then
35	echo "Skipping: cycles event not counted"
36	exit 2
37fi
38bpf_cycles=$(perf stat --no-big-num --bpf-counters -e cycles -- perf bench sched messaging -g 1 -l 100 -t 2>&1 | awk '/cycles/ {print $1}')
39if [ "$bpf_cycles" == "<not" ]; then
40	echo "Failed: cycles not counted with --bpf-counters"
41	exit 1
42fi
43
44compare_number $base_cycles $bpf_cycles
45exit 0