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perf test: Make stat bpf counters test more robust

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If the test is run on a hypervisor then the cycles event may not be
counted, skip the test in this situation. Fail the test if cycles are
not counted in the subsequent bpf counter run.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <songliubraving@fb.com>
Cc: bpf@vger.kernel.org
Link: http://lore.kernel.org/lkml/20210617184216.2075588-4-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ian Rogers 2021-06-17 11:42:16 -07:00 committed by Arnaldo Carvalho de Melo
parent 2638fbd351
commit a49ed2b4e2
1 changed files with 8 additions and 0 deletions
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8
tools/perf/tests/shell/stat_bpf_counters.sh
View file

@ -31,7 +31,15 @@ if ! perf stat --bpf-counters true > /dev/null 2>&1; then
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