name : stat_bpf_counters.sh #!/bin/sh # perf stat --bpf-counters test # SPDX-License-Identifier: GPL-2.0 set -e # check whether $2 is within +/- 10% of $1 compare_number() { first_num=$1 second_num=$2 # upper bound is first_num * 110% upper=$(expr $first_num + $first_num / 10 ) # lower bound is first_num * 90% lower=$(expr $first_num - $first_num / 10 ) if [ $second_num -gt $upper ] || [ $second_num -lt $lower ]; then echo "The difference between $first_num and $second_num are greater than 10%." exit 1 fi } # skip if --bpf-counters is not supported if ! perf stat -e cycles --bpf-counters true > /dev/null 2>&1; then if [ "$1" = "-v" ]; then echo "Skipping: --bpf-counters not supported" perf --no-pager stat -e cycles --bpf-counters true || true fi exit 2 fi base_cycles=$(perf stat --no-big-num -e cycles -- perf bench sched messaging -g 1 -l 100 -t 2>&1 | awk '/cycles/ {print $1}') if [ "$base_cycles" = "<not" ]; then echo "Skipping: cycles event not counted" exit 2 fi bpf_cycles=$(perf stat --no-big-num --bpf-counters -e cycles -- perf bench sched messaging -g 1 -l 100 -t 2>&1 | awk '/cycles/ {print $1}') if [ "$bpf_cycles" = "<not" ]; then echo "Failed: cycles not counted with --bpf-counters" exit 1 fi compare_number $base_cycles $bpf_cycles exit 0