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Signed-off-by: Ian Rogers --- tools/perf/tests/shell/record_lbr.sh | 161 +++++++++++++++++++++++++++ 1 file changed, 161 insertions(+) create mode 100755 tools/perf/tests/shell/record_lbr.sh diff --git a/tools/perf/tests/shell/record_lbr.sh b/tools/perf/tests/shell/record_lbr.sh new file mode 100755 index 000000000000..baf168d0ddbb --- /dev/null +++ b/tools/perf/tests/shell/record_lbr.sh @@ -0,0 +1,161 @@ +#!/bin/bash +# perf record LBR tests +# SPDX-License-Identifier: GPL-2.0 + +set -e + +if [ ! -f /sys/devices/cpu/caps/branches ] +then + echo "Skip: only x86 CPUs support LBR" + exit 2 +fi + +err=0 +perfdata=$(mktemp /tmp/__perf_test.perf.data.XXXXX) + +cleanup() { + rm -rf "${perfdata}" + rm -rf "${perfdata}".old + rm -rf "${perfdata}".txt + + trap - EXIT TERM INT +} + +trap_cleanup() { + cleanup + exit 1 +} +trap trap_cleanup EXIT TERM INT + + +lbr_callgraph_test() { + test="LBR callgraph" + + echo "$test" + if ! perf record -e cycles --call-graph lbr -o "${perfdata}" perf test -w thloop + then + echo "$test [Failed support missing]" + if [ $err -eq 0 ] + then + err=2 + fi + return + fi + + if ! perf report --stitch-lbr -i "${perfdata}" > "${perfdata}".txt + then + cat "${perfdata}".txt + echo "$test [Failed in perf report]" + err=1 + return + fi + + echo "$test [Success]" +} + +lbr_test() { + local branch_flags=$1 + local test="LBR $2 test" + local threshold=$3 + local out + local sam_nr + local bs_nr + local zero_nr + local r + + echo "$test" + if ! perf record -e cycles $branch_flags -o "${perfdata}" perf test -w thloop + then + echo "$test [Failed support missing]" + perf record -e cycles $branch_flags -o "${perfdata}" perf test -w thloop || true + if [ $err -eq 0 ] + then + err=2 + fi + return + fi + + out=$(perf report -D -i "${perfdata}" 2> /dev/null | grep -A1 'PERF_RECORD_SAMPLE') + sam_nr=$(echo "$out" | grep -c 'PERF_RECORD_SAMPLE' || true) + if [ $sam_nr -eq 0 ] + then + echo "$test [Failed no samples captured]" + err=1 + return + fi + echo "$test: $sam_nr samples" + + bs_nr=$(echo "$out" | grep -c 'branch stack: nr:' || true) + if [ $sam_nr -ne $bs_nr ] + then + echo "$test [Failed samples missing branch stacks]" + err=1 + return + fi + + zero_nr=$(echo "$out" | grep -c 'branch stack: nr:0' || true) + r=$(($zero_nr * 100 / $bs_nr)) + if [ $r -gt $threshold ]; then + echo "$test [Failed empty br stack ratio exceed $threshold%: $r%]" + err=1 + return + fi + + echo "$test [Success]" +} + +parallel_lbr_test() { + err=0 + perfdata=$(mktemp /tmp/__perf_test.perf.data.XXXXX) + lbr_test "$1" "$2" "$3" + cleanup + exit $err +} + +lbr_callgraph_test + +# Sequential +lbr_test "-b" "any branch" 2 +lbr_test "-j any_call" "any call" 2 +lbr_test "-j any_ret" "any ret" 2 +lbr_test "-j ind_call" "any indirect call" 2 +lbr_test "-j ind_jmp" "any indirect jump" 100 +lbr_test "-j call" "direct calls" 2 +lbr_test "-j ind_call,u" "any indirect user call" 100 +lbr_test "-a -b" "system wide any branch" 2 +lbr_test "-a -j any_call" "system wide any call" 2 + +# Parallel +parallel_lbr_test "-b" "parallel any branch" 100 & +pid1=$! +parallel_lbr_test "-j any_call" "parallel any call" 100 & +pid2=$! +parallel_lbr_test "-j any_ret" "parallel any ret" 100 & +pid3=$! +parallel_lbr_test "-j ind_call" "parallel any indirect call" 100 & +pid4=$! +parallel_lbr_test "-j ind_jmp" "parallel any indirect jump" 100 & +pid5=$! +parallel_lbr_test "-j call" "parallel direct calls" 100 & +pid6=$! +parallel_lbr_test "-j ind_call,u" "parallel any indirect user call" 100 & +pid7=$! +parallel_lbr_test "-a -b" "parallel system wide any branch" 100 & +pid8=$! +parallel_lbr_test "-a -j any_call" "parallel system wide any call" 100 & +pid9=$! + +for pid in $pid1 $pid2 $pid3 $pid4 $pid5 $pid6 $pid7 $pid8 $pid9 +do + set +e + wait $pid + child_err=$? + set -e + if ([ $err -eq 2 ] && [ $child_err -eq 1 ]) || [ $err -eq 0 ] + then + err=$child_err + fi +done + +cleanup +exit $err -- 2.46.0.rc2.264.g509ed76dc8-goog