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Diffstat (limited to '')
-rwxr-xr-x | tools/perf/tests/shell/stat_bpf_counters.sh | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/tools/perf/tests/shell/stat_bpf_counters.sh b/tools/perf/tests/shell/stat_bpf_counters.sh new file mode 100755 index 000000000000..61f8149d854e --- /dev/null +++ b/tools/perf/tests/shell/stat_bpf_counters.sh @@ -0,0 +1,74 @@ +#!/bin/sh +# perf stat --bpf-counters test +# SPDX-License-Identifier: GPL-2.0 + +set -e + +workload="perf bench sched messaging -g 1 -l 100 -t" + +# check whether $2 is within +/- 20% of $1 +compare_number() +{ + first_num=$1 + second_num=$2 + + # upper bound is first_num * 120% + upper=$(expr $first_num + $first_num / 5 ) + # lower bound is first_num * 80% + lower=$(expr $first_num - $first_num / 5 ) + + if [ $second_num -gt $upper ] || [ $second_num -lt $lower ]; then + echo "The difference between $first_num and $second_num are greater than 20%." + exit 1 + fi +} + +check_counts() +{ + base_cycles=$1 + bpf_cycles=$2 + + if [ "$base_cycles" = "<not" ]; then + echo "Skipping: cycles event not counted" + exit 2 + fi + if [ "$bpf_cycles" = "<not" ]; then + echo "Failed: cycles not counted with --bpf-counters" + exit 1 + fi +} + +test_bpf_counters() +{ + printf "Testing --bpf-counters " + base_cycles=$(perf stat --no-big-num -e cycles -- $workload 2>&1 | awk '/cycles/ {print $1}') + bpf_cycles=$(perf stat --no-big-num --bpf-counters -e cycles -- $workload 2>&1 | awk '/cycles/ {print $1}') + check_counts $base_cycles $bpf_cycles + compare_number $base_cycles $bpf_cycles + echo "[Success]" +} + +test_bpf_modifier() +{ + printf "Testing bpf event modifier " + stat_output=$(perf stat --no-big-num -e cycles/name=base_cycles/,cycles/name=bpf_cycles/b -- $workload 2>&1) + base_cycles=$(echo "$stat_output"| awk '/base_cycles/ {print $1}') + bpf_cycles=$(echo "$stat_output"| awk '/bpf_cycles/ {print $1}') + check_counts $base_cycles $bpf_cycles + compare_number $base_cycles $bpf_cycles + echo "[Success]" +} + +# 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 + +test_bpf_counters +test_bpf_modifier + +exit 0 |