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perf test bpf-counters: Add test for BPF event modifier

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Refactor test to better enable sharing of logic, to give an idea of
progress and introduce test functions. Add test of measuring both
cycles and cycles:b simultaneously.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Song Liu <song@kernel.org>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Link: https://lore.kernel.org/r/20240416170014.985191-2-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ian Rogers 2024-04-16 10:00:14 -07:00 committed by Arnaldo Carvalho de Melo
parent eb4d27cf9a
commit d9bd1d4264
1 changed files with 50 additions and 21 deletions
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51
tools/perf/tests/shell/stat_bpf_counters.sh
View file

@ -4,6 +4,8 @@
set -e
workload="perf bench sched messaging -g 1 -l 100 -t"
# check whether $2 is within +/- 20% of $1
compare_number()
{
@ -21,6 +23,42 @@ compare_number()
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 [ "$1" = "-v" ]; then
@ -30,16 +68,7 @@ if ! perf stat -e cycles --bpf-counters true > /dev/null 2>&1; then
exit 2
fi
base_cycles=$(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
test_bpf_counters
test_bpf_modifier
compare_number $base_cycles $bpf_cycles
exit 0