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Diffstat (limited to '')
-rwxr-xr-x | tools/perf/tests/shell/lock_contention.sh | 336 |
1 files changed, 336 insertions, 0 deletions
diff --git a/tools/perf/tests/shell/lock_contention.sh b/tools/perf/tests/shell/lock_contention.sh new file mode 100755 index 000000000000..c1ec5762215b --- /dev/null +++ b/tools/perf/tests/shell/lock_contention.sh @@ -0,0 +1,336 @@ +#!/bin/sh +# kernel lock contention analysis test +# SPDX-License-Identifier: GPL-2.0 + +set -e + +err=0 +perfdata=$(mktemp /tmp/__perf_test.perf.data.XXXXX) +result=$(mktemp /tmp/__perf_test.result.XXXXX) + +cleanup() { + rm -f ${perfdata} + rm -f ${result} + trap - EXIT TERM INT +} + +trap_cleanup() { + cleanup + exit ${err} +} +trap trap_cleanup EXIT TERM INT + +check() { + if [ "$(id -u)" != 0 ]; then + echo "[Skip] No root permission" + err=2 + exit + fi + + if ! perf list | grep -q lock:contention_begin; then + echo "[Skip] No lock contention tracepoints" + err=2 + exit + fi + + # shellcheck disable=SC2046 + if [ `nproc` -lt 4 ]; then + echo "[Skip] Low number of CPUs (`nproc`), lock event cannot be triggered certainly" + err=2 + exit + fi +} + +test_record() +{ + echo "Testing perf lock record and perf lock contention" + perf lock record -o ${perfdata} -- perf bench sched messaging > /dev/null 2>&1 + # the output goes to the stderr and we expect only 1 output (-E 1) + perf lock contention -i ${perfdata} -E 1 -q 2> ${result} + if [ "$(cat "${result}" | wc -l)" != "1" ]; then + echo "[Fail] Recorded result count is not 1:" "$(cat "${result}" | wc -l)" + err=1 + exit + fi +} + +test_bpf() +{ + echo "Testing perf lock contention --use-bpf" + + if ! perf lock con -b true > /dev/null 2>&1 ; then + echo "[Skip] No BPF support" + return + fi + + # the perf lock contention output goes to the stderr + perf lock con -a -b -E 1 -q -- perf bench sched messaging > /dev/null 2> ${result} + if [ "$(cat "${result}" | wc -l)" != "1" ]; then + echo "[Fail] BPF result count is not 1:" "$(cat "${result}" | wc -l)" + err=1 + exit + fi +} + +test_record_concurrent() +{ + echo "Testing perf lock record and perf lock contention at the same time" + perf lock record -o- -- perf bench sched messaging 2> /dev/null | \ + perf lock contention -i- -E 1 -q 2> ${result} + if [ "$(cat "${result}" | wc -l)" != "1" ]; then + echo "[Fail] Recorded result count is not 1:" "$(cat "${result}" | wc -l)" + err=1 + exit + fi +} + +test_aggr_task() +{ + echo "Testing perf lock contention --threads" + perf lock contention -i ${perfdata} -t -E 1 -q 2> ${result} + if [ "$(cat "${result}" | wc -l)" != "1" ]; then + echo "[Fail] Recorded result count is not 1:" "$(cat "${result}" | wc -l)" + err=1 + exit + fi + + if ! perf lock con -b true > /dev/null 2>&1 ; then + return + fi + + # the perf lock contention output goes to the stderr + perf lock con -a -b -t -E 1 -q -- perf bench sched messaging > /dev/null 2> ${result} + if [ "$(cat "${result}" | wc -l)" != "1" ]; then + echo "[Fail] BPF result count is not 1:" "$(cat "${result}" | wc -l)" + err=1 + exit + fi +} + +test_aggr_addr() +{ + echo "Testing perf lock contention --lock-addr" + perf lock contention -i ${perfdata} -l -E 1 -q 2> ${result} + if [ "$(cat "${result}" | wc -l)" != "1" ]; then + echo "[Fail] Recorded result count is not 1:" "$(cat "${result}" | wc -l)" + err=1 + exit + fi + + if ! perf lock con -b true > /dev/null 2>&1 ; then + return + fi + + # the perf lock contention output goes to the stderr + perf lock con -a -b -l -E 1 -q -- perf bench sched messaging > /dev/null 2> ${result} + if [ "$(cat "${result}" | wc -l)" != "1" ]; then + echo "[Fail] BPF result count is not 1:" "$(cat "${result}" | wc -l)" + err=1 + exit + fi +} + +test_aggr_cgroup() +{ + echo "Testing perf lock contention --lock-cgroup" + + if ! perf lock con -b true > /dev/null 2>&1 ; then + echo "[Skip] No BPF support" + return + fi + + # the perf lock contention output goes to the stderr + perf lock con -a -b -g -E 1 -q -- perf bench sched messaging > /dev/null 2> ${result} + if [ "$(cat "${result}" | wc -l)" != "1" ]; then + echo "[Fail] BPF result count is not 1:" "$(cat "${result}" | wc -l)" + err=1 + exit + fi +} + +test_type_filter() +{ + echo "Testing perf lock contention --type-filter (w/ spinlock)" + perf lock contention -i ${perfdata} -Y spinlock -q 2> ${result} + if [ "$(grep -c -v spinlock "${result}")" != "0" ]; then + echo "[Fail] Recorded result should not have non-spinlocks:" "$(cat "${result}")" + err=1 + exit + fi + + if ! perf lock con -b true > /dev/null 2>&1 ; then + return + fi + + perf lock con -a -b -Y spinlock -q -- perf bench sched messaging > /dev/null 2> ${result} + if [ "$(grep -c -v spinlock "${result}")" != "0" ]; then + echo "[Fail] BPF result should not have non-spinlocks:" "$(cat "${result}")" + err=1 + exit + fi +} + +test_lock_filter() +{ + echo "Testing perf lock contention --lock-filter (w/ tasklist_lock)" + perf lock contention -i ${perfdata} -l -q 2> ${result} + if [ "$(grep -c tasklist_lock "${result}")" != "1" ]; then + echo "[Skip] Could not find 'tasklist_lock'" + return + fi + + perf lock contention -i ${perfdata} -L tasklist_lock -q 2> ${result} + + # find out the type of tasklist_lock + test_lock_filter_type=$(head -1 "${result}" | awk '{ print $8 }' | sed -e 's/:.*//') + + if [ "$(grep -c -v "${test_lock_filter_type}" "${result}")" != "0" ]; then + echo "[Fail] Recorded result should not have non-${test_lock_filter_type} locks:" "$(cat "${result}")" + err=1 + exit + fi + + if ! perf lock con -b true > /dev/null 2>&1 ; then + return + fi + + perf lock con -a -b -L tasklist_lock -q -- perf bench sched messaging > /dev/null 2> ${result} + if [ "$(grep -c -v "${test_lock_filter_type}" "${result}")" != "0" ]; then + echo "[Fail] BPF result should not have non-${test_lock_filter_type} locks:" "$(cat "${result}")" + err=1 + exit + fi +} + +test_stack_filter() +{ + echo "Testing perf lock contention --callstack-filter (w/ unix_stream)" + perf lock contention -i ${perfdata} -v -q 2> ${result} + if [ "$(grep -c unix_stream "${result}")" = "0" ]; then + echo "[Skip] Could not find 'unix_stream'" + return + fi + + perf lock contention -i ${perfdata} -E 1 -S unix_stream -q 2> ${result} + if [ "$(cat "${result}" | wc -l)" != "1" ]; then + echo "[Fail] Recorded result should have a lock from unix_stream:" "$(cat "${result}")" + err=1 + exit + fi + + if ! perf lock con -b true > /dev/null 2>&1 ; then + return + fi + + perf lock con -a -b -S unix_stream -E 1 -q -- perf bench sched messaging > /dev/null 2> ${result} + if [ "$(cat "${result}" | wc -l)" != "1" ]; then + echo "[Fail] BPF result should have a lock from unix_stream:" "$(cat "${result}")" + err=1 + exit + fi +} + +test_aggr_task_stack_filter() +{ + echo "Testing perf lock contention --callstack-filter with task aggregation" + perf lock contention -i ${perfdata} -v -q 2> ${result} + if [ "$(grep -c unix_stream "${result}")" = "0" ]; then + echo "[Skip] Could not find 'unix_stream'" + return + fi + + perf lock contention -i ${perfdata} -t -E 1 -S unix_stream -q 2> ${result} + if [ "$(cat "${result}" | wc -l)" != "1" ]; then + echo "[Fail] Recorded result should have a task from unix_stream:" "$(cat "${result}")" + err=1 + exit + fi + + if ! perf lock con -b true > /dev/null 2>&1 ; then + return + fi + + perf lock con -a -b -t -S unix_stream -E 1 -q -- perf bench sched messaging > /dev/null 2> ${result} + if [ "$(cat "${result}" | wc -l)" != "1" ]; then + echo "[Fail] BPF result should have a task from unix_stream:" "$(cat "${result}")" + err=1 + exit + fi +} +test_cgroup_filter() +{ + echo "Testing perf lock contention --cgroup-filter" + + if ! perf lock con -b true > /dev/null 2>&1 ; then + echo "[Skip] No BPF support" + return + fi + + perf lock con -a -b -g -E 1 -F wait_total -q -- perf bench sched messaging > /dev/null 2> ${result} + if [ "$(cat "${result}" | wc -l)" != "1" ]; then + echo "[Fail] BPF result should have a cgroup result:" "$(cat "${result}")" + err=1 + exit + fi + + cgroup=$(cat "${result}" | awk '{ print $3 }') + perf lock con -a -b -g -E 1 -G "${cgroup}" -q -- perf bench sched messaging > /dev/null 2> ${result} + if [ "$(cat "${result}" | wc -l)" != "1" ]; then + echo "[Fail] BPF result should have a result with cgroup filter:" "$(cat "${cgroup}")" + err=1 + exit + fi +} + + +test_csv_output() +{ + echo "Testing perf lock contention CSV output" + perf lock contention -i ${perfdata} -E 1 -x , --output ${result} + # count the number of commas in the header + # it should have 5: contended, total-wait, max-wait, avg-wait, type, caller + header=$(grep "# output:" ${result} | tr -d -c , | wc -c) + if [ "${header}" != "5" ]; then + echo "[Fail] Recorded result does not have enough output columns: ${header} != 5" + err=1 + exit + fi + # count the number of commas in the output + output=$(grep -v "^#" ${result} | tr -d -c , | wc -c) + if [ "${header}" != "${output}" ]; then + echo "[Fail] Recorded result does not match the number of commas: ${header} != ${output}" + err=1 + exit + fi + + if ! perf lock con -b true > /dev/null 2>&1 ; then + echo "[Skip] No BPF support" + return + fi + + # the perf lock contention output goes to the stderr + perf lock con -a -b -E 1 -x , --output ${result} -- perf bench sched messaging > /dev/null 2>&1 + output=$(grep -v "^#" ${result} | tr -d -c , | wc -c) + if [ "${header}" != "${output}" ]; then + echo "[Fail] BPF result does not match the number of commas: ${header} != ${output}" + err=1 + exit + fi +} + +check + +test_record +test_bpf +test_record_concurrent +test_aggr_task +test_aggr_addr +test_aggr_cgroup +test_type_filter +test_lock_filter +test_stack_filter +test_aggr_task_stack_filter +test_cgroup_filter +test_csv_output + +exit ${err} |