diff options
author | Song Liu <songliubraving@fb.com> | 2021-03-23 23:42:47 +0300 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-03-24 00:05:36 +0300 |
commit | 2c0cb9f56020d2ea006589434d5eb4e702110124 (patch) | |
tree | 0361fd67e378a91fbadb02a28345bb5e3d9a1f7f /tools/perf/tests | |
parent | 435b46ef1d9fd904089199da16a21ade0701537f (diff) | |
download | linux-2c0cb9f56020d2ea006589434d5eb4e702110124.tar.xz |
perf test: Add a shell test for 'perf stat --bpf-counters' new option
Add a test to compare the output of perf-stat with and without option
--bpf-counters. If the difference is more than 10%, the test is considered
as failed.
Committer testing:
# perf test bpf-counters
86: perf stat --bpf-counters test : Ok
# perf test -v bpf-counters
86: perf stat --bpf-counters test :
--- start ---
test child forked, pid 2433339
test child finished with 0
---- end ----
perf stat --bpf-counters test: Ok
#
Signed-off-by: Song Liu <songliubraving@fb.com>
Requested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lore.kernel.org/lkml/EC00E37D-8587-4662-8E30-7AD5F874FA84@fb.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/tests')
-rwxr-xr-x | tools/perf/tests/shell/stat_bpf_counters.sh | 31 |
1 files changed, 31 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..22eb31e48ca7 --- /dev/null +++ b/tools/perf/tests/shell/stat_bpf_counters.sh @@ -0,0 +1,31 @@ +#!/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=$2 + + # upper bound is first_num * 110% + upper=$(( $first_num + $first_num / 10 )) + # lower bound is first_num * 90% + lower=$(( $first_num - $first_num / 10 )) + + if [ $second_num -gt $upper ] || [ $second_num -lt $lower ]; then + echo "The difference between $first_num and $second_num are greater than 10%." + exit 1 + fi +} + +# skip if --bpf-counters is not supported +perf stat --bpf-counters true > /dev/null 2>&1 || exit 2 + +base_cycles=$(perf stat --no-big-num -e cycles -- perf bench sched messaging -g 1 -l 100 -t 2>&1 | awk '/cycles/ {print $1}') +bpf_cycles=$(perf stat --no-big-num --bpf-counters -e cycles -- perf bench sched messaging -g 1 -l 100 -t 2>&1 | awk '/cycles/ {print $1}') + +compare_number $base_cycles $bpf_cycles +exit 0 |