1#!/bin/sh 2# perf stat --bpf-counters test 3# SPDX-License-Identifier: GPL-2.0 4 5set -e 6 7workload="perf bench sched messaging -g 1 -l 100 -t" 8 9# check whether $2 is within +/- 20% of $1 10compare_number() 11{ 12 first_num=$1 13 second_num=$2 14 15 # upper bound is first_num * 120% 16 upper=$(expr $first_num + $first_num / 5 ) 17 # lower bound is first_num * 80% 18 lower=$(expr $first_num - $first_num / 5 ) 19 20 if [ $second_num -gt $upper ] || [ $second_num -lt $lower ]; then 21 echo "The difference between $first_num and $second_num are greater than 20%." 22 exit 1 23 fi 24} 25 26check_counts() 27{ 28 base_cycles=$1 29 bpf_cycles=$2 30 31 if [ "$base_cycles" = "<not" ]; then 32 echo "Skipping: cycles event not counted" 33 exit 2 34 fi 35 if [ "$bpf_cycles" = "<not" ]; then 36 echo "Failed: cycles not counted with --bpf-counters" 37 exit 1 38 fi 39} 40 41test_bpf_counters() 42{ 43 printf "Testing --bpf-counters " 44 base_cycles=$(perf stat --no-big-num -e cycles -- $workload 2>&1 | awk '/cycles/ {print $1}') 45 bpf_cycles=$(perf stat --no-big-num --bpf-counters -e cycles -- $workload 2>&1 | awk '/cycles/ {print $1}') 46 check_counts $base_cycles $bpf_cycles 47 compare_number $base_cycles $bpf_cycles 48 echo "[Success]" 49} 50 51test_bpf_modifier() 52{ 53 printf "Testing bpf event modifier " 54 stat_output=$(perf stat --no-big-num -e cycles/name=base_cycles/,cycles/name=bpf_cycles/b -- $workload 2>&1) 55 base_cycles=$(echo "$stat_output"| awk '/base_cycles/ {print $1}') 56 bpf_cycles=$(echo "$stat_output"| awk '/bpf_cycles/ {print $1}') 57 check_counts $base_cycles $bpf_cycles 58 compare_number $base_cycles $bpf_cycles 59 echo "[Success]" 60} 61 62# skip if --bpf-counters is not supported 63if ! perf stat -e cycles --bpf-counters true > /dev/null 2>&1; then 64 if [ "$1" = "-v" ]; then 65 echo "Skipping: --bpf-counters not supported" 66 perf --no-pager stat -e cycles --bpf-counters true || true 67 fi 68 exit 2 69fi 70 71test_bpf_counters 72test_bpf_modifier 73 74exit 0 75