Commit a49ed2b4 authored by Ian Rogers's avatar Ian Rogers Committed by Arnaldo Carvalho de Melo
Browse files

perf test: Make stat bpf counters test more robust 



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: default avatarIan 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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 2638fbd3

tools/perf/tests/shell/stat_bpf_counters.sh

+8 −0
Original line number Diff line number Diff line
@@ -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