d9bd1d4264
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>
75 lines
1.8 KiB
Bash
Executable File
75 lines
1.8 KiB
Bash
Executable File
#!/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
|