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 +/- 20% of $1 8compare_number() 9{ 10 first_num=$1 11 second_num=$2 12 13 # upper bound is first_num * 120% 14 upper=$(expr $first_num + $first_num / 5 ) 15 # lower bound is first_num * 80% 16 lower=$(expr $first_num - $first_num / 5 ) 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 20%." 20 exit 1 21 fi 22} 23 24# skip if --bpf-counters is not supported 25if ! perf stat -e cycles --bpf-counters true > /dev/null 2>&1; then 26 if [ "$1" = "-v" ]; then 27 echo "Skipping: --bpf-counters not supported" 28 perf --no-pager stat -e cycles --bpf-counters true || true 29 fi 30 exit 2 31fi 32 33base_cycles=$(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 46