1#!/bin/bash 2# perf stat --bpf-counters test (exclusive) 3# SPDX-License-Identifier: GPL-2.0 4 5set -e 6 7workload="perf test -w sqrtloop" 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_instructions=$1 29 bpf_instructions=$2 30 31 if [ "$base_instructions" = "<not" ]; then 32 echo "Skipping: instructions event not counted" 33 exit 2 34 fi 35 if [ "$bpf_instructions" = "<not" ]; then 36 echo "Failed: instructions not counted with --bpf-counters" 37 exit 1 38 fi 39} 40 41test_bpf_counters() 42{ 43 printf "Testing --bpf-counters " 44 base_instructions=$(perf stat --no-big-num -e instructions -- $workload 2>&1 | \ 45 awk -v i=0 -v c=0 '/instructions/ { \ 46 if ($1 != "<not") { i++; c += $1 } \ 47 } END { if (i > 0) printf "%.0f", c; else print "<not" }') 48 bpf_instructions=$(perf stat --no-big-num --bpf-counters -e instructions -- $workload 2>&1 | \ 49 awk -v i=0 -v c=0 '/instructions/ { \ 50 if ($1 != "<not") { i++; c += $1 } \ 51 } END { if (i > 0) printf "%.0f", c; else print "<not" }') 52 check_counts $base_instructions $bpf_instructions 53 compare_number $base_instructions $bpf_instructions 54 echo "[Success]" 55} 56 57test_bpf_modifier() 58{ 59 printf "Testing bpf event modifier " 60 stat_output=$(perf stat --no-big-num -e instructions/name=base_instructions/,instructions/name=bpf_instructions/b -- $workload 2>&1) 61 base_instructions=$(echo "$stat_output"| \ 62 awk -v i=0 -v c=0 '/base_instructions/ { \ 63 if ($1 != "<not") { i++; c += $1 } \ 64 } END { if (i > 0) printf "%.0f", c; else print "<not" }') 65 bpf_instructions=$(echo "$stat_output"| \ 66 awk -v i=0 -v c=0 '/bpf_instructions/ { \ 67 if ($1 != "<not") { i++; c += $1 } \ 68 } END { if (i > 0) printf "%.0f", c; else print "<not" }') 69 check_counts $base_instructions $bpf_instructions 70 compare_number $base_instructions $bpf_instructions 71 echo "[Success]" 72} 73 74# skip if --bpf-counters is not supported 75if ! perf stat -e instructions --bpf-counters true > /dev/null 2>&1; then 76 if [ "$1" = "-v" ]; then 77 echo "Skipping: --bpf-counters not supported" 78 perf --no-pager stat -e instructions --bpf-counters true || true 79 fi 80 exit 2 81fi 82 83test_bpf_counters 84test_bpf_modifier 85 86exit 0 87