Something went wrong. Try again.
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Something went wrong. Try again.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557#!/bin/bash# perf stat tests# SPDX-License-Identifier: GPL-2.0
set -e
err=0stat_output=$(mktemp /tmp/perf-stat-test-output.XXXXX)
cleanup() { rm -f "${stat_output}" trap - EXIT TERM INT}
trap_cleanup() { echo "Unexpected signal in ${FUNCNAME[1]}" cleanup exit 1}
trap trap_cleanup EXIT TERM INT
test_default_stat() { echo "Basic stat command test" if ! perf stat true 2>&1 | grep -E -q "Performance counter stats for 'true':" then echo "Basic stat command test [Failed]" err=1 return fi echo "Basic stat command test [Success]"}
test_null_stat() { echo "Null stat command test" if ! perf stat --null true 2>&1 | grep -E -q "Performance counter stats for 'true':" then echo "Null stat command test [Failed]" err=1 return fi echo "Null stat command test [Success]"}
find_offline_cpu() { for i in $(seq 1 4096) do if [[ ! -f /sys/devices/system/cpu/cpu$i/online || \ $(cat /sys/devices/system/cpu/cpu$i/online) == "0" ]] then echo $i return fi done echo "Failed to find offline CPU" exit 1}
test_offline_cpu_stat() { cpu=$(find_offline_cpu) echo "Offline CPU stat command test (cpu $cpu)" if ! perf stat "-C$cpu" -e cycles true 2>&1 | grep -E -q "No supported events found." then echo "Offline CPU stat command test [Failed]" err=1 return fi echo "Offline CPU stat command test [Success]"}
test_stat_record_report() { echo "stat record and report test" if ! perf stat record -e task-clock -o - true | perf stat report -i - 2>&1 | \ grep -E -q "Performance counter stats for 'pipe':" then echo "stat record and report test [Failed]" err=1 return fi echo "stat record and report test [Success]"}
test_stat_record_script() { echo "stat record and script test" if ! perf stat record -e task-clock -o - true | perf script -i - 2>&1 | \ grep -E -q "CPU[[:space:]]+THREAD[[:space:]]+VAL[[:space:]]+ENA[[:space:]]+RUN[[:space:]]+TIME[[:space:]]+EVENT" then echo "stat record and script test [Failed]" err=1 return fi echo "stat record and script test [Success]"}
test_stat_repeat_weak_groups() { echo "stat repeat weak groups test" if ! perf stat -e '{cycles,cycles,cycles,cycles,cycles,cycles,cycles,cycles,cycles,cycles}' \ true 2>&1 | grep -q 'seconds time elapsed' then echo "stat repeat weak groups test [Skipped event parsing failed]" return fi if ! perf stat -r2 -e '{cycles,cycles,cycles,cycles,cycles,cycles,cycles,cycles,cycles,cycles}:W' \ true > /dev/null 2>&1 then echo "stat repeat weak groups test [Failed]" err=1 return fi echo "stat repeat weak groups test [Success]"}
test_topdown_groups() { # Topdown events must be grouped with the slots event first. Test that # parse-events reorders this. echo "Topdown event group test" if ! perf stat -e '{slots,topdown-retiring}' true > /dev/null 2>&1 then echo "Topdown event group test [Skipped event parsing failed]" return fi td_err=0 do_topdown_group_test() { events=$1 failure=$2 if perf stat -e "$events" true 2>&1 | grep -E -q "<not supported>" then echo "Topdown event group test [Failed $failure for '$events']" td_err=1 return fi } do_topdown_group_test "{slots,topdown-retiring}" "events not supported" do_topdown_group_test "{instructions,r400,r8000}" "raw format slots not reordered first" filler_events=("instructions" "cycles" "context-switches" "faults") for ((i = 0; i < ${#filler_events[@]}; i+=2)) do filler1=${filler_events[i]} filler2=${filler_events[i+1]} do_topdown_group_test "$filler1,topdown-retiring,slots" \ "slots not reordered first in no-group case" do_topdown_group_test "slots,$filler1,topdown-retiring" \ "topdown metrics event not reordered in no-group case" do_topdown_group_test "{$filler1,topdown-retiring,slots}" \ "slots not reordered first in single group case" do_topdown_group_test "{$filler1,slots},topdown-retiring" \ "topdown metrics event not move into slots group" do_topdown_group_test "topdown-retiring,{$filler1,slots}" \ "topdown metrics event not move into slots group last" do_topdown_group_test "{$filler1,slots},{topdown-retiring}" \ "topdown metrics group not merge into slots group" do_topdown_group_test "{topdown-retiring},{$filler1,slots}" \ "topdown metrics group not merge into slots group last" do_topdown_group_test "{$filler1,slots},$filler2,topdown-retiring" \ "non-adjacent topdown metrics group not move into slots group" do_topdown_group_test "$filler2,topdown-retiring,{$filler1,slots}" \ "non-adjacent topdown metrics group not move into slots group last" do_topdown_group_test "{$filler1,slots},{$filler2,topdown-retiring}" \ "metrics group not merge into slots group" do_topdown_group_test "{$filler1,topdown-retiring},{$filler2,slots}" \ "metrics group not merge into slots group last" done if test "$td_err" -eq 0 then echo "Topdown event group test [Success]" else err="$td_err" fi}
test_topdown_weak_groups() { # Weak groups break if the perf_event_open of multiple grouped events # fails. Breaking a topdown group causes the events to fail. Test a very large # grouping to see that the topdown events aren't broken out. echo "Topdown weak groups test" ok_grouping="{slots,topdown-bad-spec,topdown-be-bound,topdown-fe-bound,topdown-retiring},branch-instructions,branch-misses,bus-cycles,cache-misses,cache-references,cpu-cycles,instructions,mem-loads,mem-stores,ref-cycles,cache-misses,cache-references" if ! perf stat --no-merge -e "$ok_grouping" true > /dev/null 2>&1 then echo "Topdown weak groups test [Skipped event parsing failed]" return fi group_needs_break="{slots,topdown-bad-spec,topdown-be-bound,topdown-fe-bound,topdown-retiring,branch-instructions,branch-misses,bus-cycles,cache-misses,cache-references,cpu-cycles,instructions,mem-loads,mem-stores,ref-cycles,cache-misses,cache-references}:W" if perf stat --no-merge -e "$group_needs_break" true 2>&1 | grep -E -q "<not supported>" then echo "Topdown weak groups test [Failed events not supported]" err=1 return fi echo "Topdown weak groups test [Success]"}
test_cputype() { # Test --cputype argument. echo "cputype test"
# Bogus PMU should fail. if perf stat --cputype="123" -e instructions true > /dev/null 2>&1 then echo "cputype test [Bogus PMU didn't fail]" err=1 return fi
# Find a known PMU for cputype. pmu="" devs="/sys/bus/event_source/devices" for i in $devs/cpu $devs/cpu_atom $devs/armv8_pmuv3_0 $devs/armv8_cortex_* do i_base=$(basename "$i") if test -d "$i" then pmu="$i_base" break fi if perf stat -e "$i_base/instructions/" true > /dev/null 2>&1 then pmu="$i_base" break fi done if test "x$pmu" = "x" then echo "cputype test [Skipped known PMU not found]" return fi
# Test running with cputype produces output. if ! perf stat --cputype="$pmu" -e instructions true 2>&1 | grep -E -q "instructions" then echo "cputype test [Failed count missed with given filter]" err=1 return fi echo "cputype test [Success]"}
test_hybrid() { # Test the default stat command on hybrid devices opens one cycles event for # each CPU type. echo "hybrid test"
# Count the number of core PMUs, assume minimum of 1 pmus=$(ls /sys/bus/event_source/devices/*/cpus 2>/dev/null | wc -l) if [ "$pmus" -lt 1 ] then pmus=1 fi
# Run default Perf stat cycles_events=$(perf stat -a -- sleep 0.1 2>&1 | grep -E "/cpu-cycles/[uH]*| cpu-cycles[:uH]* " | wc -l)
# The expectation is that default output will have a cycles events on each # hybrid PMU. In situations with no cycles PMU events, like virtualized, this # can fall back to task-clock and so the end count may be 0. Fail if neither # condition holds. if [ "$pmus" -ne "$cycles_events" ] && [ "0" -ne "$cycles_events" ] then echo "hybrid test [Found $pmus PMUs but $cycles_events cycles events. Failed]" err=1 return fi echo "hybrid test [Success]"}
test_stat_cpu() { echo "stat -C <cpu> test" # Test the full online CPU list (ranges and lists) online_cpus=$(cat /sys/devices/system/cpu/online) if ! perf stat -C "$online_cpus" -a true > "${stat_output}" 2>&1 then echo "stat -C <cpu> test [Failed - command failed for cpus $online_cpus]" cat "${stat_output}" err=1 return fi
if ! grep -E -q "Performance counter stats for" "${stat_output}" then echo "stat -C <cpu> test [Failed - missing output for cpus $online_cpus]" cat "${stat_output}" err=1 return fi
# Test each individual online CPU for cpu_dir in /sys/devices/system/cpu/cpu[0-9]*; do cpu=${cpu_dir##*/cpu} # Check if online if [ -f "$cpu_dir/online" ] && [ "$(cat "$cpu_dir/online")" -eq 0 ] then continue fi
if ! perf stat -C "$cpu" -a true > "${stat_output}" 2>&1 then echo "stat -C <cpu> test [Failed - command failed for cpu $cpu]" cat "${stat_output}" err=1 return fi if ! grep -E -q "Performance counter stats for" "${stat_output}" then echo "stat -C <cpu> test [Failed - missing output for cpu $cpu]" cat "${stat_output}" err=1 return fi done
# Test synthetic list and range if cpu0 and cpu1 are online c0_online=0 c1_online=0 if [ -d "/sys/devices/system/cpu/cpu0" ] then if [ ! -f "/sys/devices/system/cpu/cpu0/online" ] || [ "$(cat /sys/devices/system/cpu/cpu0/online)" -eq 1 ] then c0_online=1 fi fi if [ -d "/sys/devices/system/cpu/cpu1" ] then if [ ! -f "/sys/devices/system/cpu/cpu1/online" ] || [ "$(cat /sys/devices/system/cpu/cpu1/online)" -eq 1 ] then c1_online=1 fi fi
if [ $c0_online -eq 1 ] && [ $c1_online -eq 1 ] then # Test list "0,1" if ! perf stat -C "0,1" -a true > "${stat_output}" 2>&1 then echo "stat -C <cpu> test [Failed - command failed for cpus 0,1]" cat "${stat_output}" err=1 return fi if ! grep -E -q "Performance counter stats for" "${stat_output}" then echo "stat -C <cpu> test [Failed - missing output for cpus 0,1]" cat "${stat_output}" err=1 return fi
# Test range "0-1" if ! perf stat -C "0-1" -a true > "${stat_output}" 2>&1 then echo "stat -C <cpu> test [Failed - command failed for cpus 0-1]" cat "${stat_output}" err=1 return fi if ! grep -E -q "Performance counter stats for" "${stat_output}" then echo "stat -C <cpu> test [Failed - missing output for cpus 0-1]" cat "${stat_output}" err=1 return fi fi
echo "stat -C <cpu> test [Success]"}
test_stat_no_aggr() { echo "stat -A test" if ! perf stat -A -a true > "${stat_output}" 2>&1 then echo "stat -A test [Failed - command failed]" cat "${stat_output}" err=1 return fi
if ! grep -E -q "CPU" "${stat_output}" then echo "stat -A test [Failed - missing CPU column]" cat "${stat_output}" err=1 return fi echo "stat -A test [Success]"}
test_stat_detailed() { echo "stat -d test" if ! perf stat -d true > "${stat_output}" 2>&1 then echo "stat -d test [Failed - command failed]" cat "${stat_output}" err=1 return fi
if ! grep -E -q "Performance counter stats" "${stat_output}" then echo "stat -d test [Failed - missing output]" cat "${stat_output}" err=1 return fi
if ! perf stat -dd true > "${stat_output}" 2>&1 then echo "stat -dd test [Failed - command failed]" cat "${stat_output}" err=1 return fi
if ! grep -E -q "Performance counter stats" "${stat_output}" then echo "stat -dd test [Failed - missing output]" cat "${stat_output}" err=1 return fi
if ! perf stat -ddd true > "${stat_output}" 2>&1 then echo "stat -ddd test [Failed - command failed]" cat "${stat_output}" err=1 return fi
if ! grep -E -q "Performance counter stats" "${stat_output}" then echo "stat -ddd test [Failed - missing output]" cat "${stat_output}" err=1 return fi
echo "stat -d test [Success]"}
test_stat_repeat() { echo "stat -r test" if ! perf stat -r 2 true > "${stat_output}" 2>&1 then echo "stat -r test [Failed - command failed]" cat "${stat_output}" err=1 return fi
if ! grep -E -q "\([[:space:]]*\+-.*%[[:space:]]*\)" "${stat_output}" then echo "stat -r test [Failed - missing variance]" cat "${stat_output}" err=1 return fi echo "stat -r test [Success]"}
test_stat_pid() { echo "stat -p test" sleep 1 & pid=$! if ! perf stat -p $pid > "${stat_output}" 2>&1 then echo "stat -p test [Failed - command failed]" cat "${stat_output}" err=1 kill $pid 2>/dev/null || true wait $pid 2>/dev/null || true return fi
if ! grep -E -q "Performance counter stats" "${stat_output}" then echo "stat -p test [Failed - missing output]" cat "${stat_output}" err=1 else echo "stat -p test [Success]" fi kill $pid 2>/dev/null || true wait $pid 2>/dev/null || true}
test_stat_delay() { echo "stat -D test" if ! env LC_ALL=C perf stat -D 1000 -e duration_time sleep 2 > "${stat_output}" 2>&1 then echo "stat -D test [Failed - command failed]" cat "${stat_output}" err=1 return fi
duration=$(grep "duration_time" "${stat_output}" | awk '{print $1}' | tr -d ',') elapsed=$(grep "seconds time elapsed" "${stat_output}" | awk '{print $1}')
if [ -z "$duration" ] || [ -z "$elapsed" ] then echo "stat -D test [Failed - failed to find duration_time or time elapsed in output]" cat "${stat_output}" err=1 return fi
# Compare duration (ns) and elapsed (s) using awk to handle float and allow tolerance. if ! awk -v d="$duration" -v e="$elapsed" ' BEGIN { diff = d - (e * 1e9); if (diff < 0) diff = -diff; # Allow 200ms tolerance (200,000,000 ns) for loaded CI machines. if (diff > 200000000) { printf "Fail: duration (%d ns) and elapsed (%f s) mismatch (diff %d ns)\n", d, e, diff; exit 1; } # Lower bound check: must be at least 0.5s. if (d < 500000000) { printf "Fail: duration (%d ns) is abnormally small\n", d; exit 1; } # Upper bound check: must be strictly less than 1.7s (proving delay was excluded). if (d > 1700000000) { printf "Fail: duration (%d ns) is too large (delay might not be excluded)\n", d; exit 1; } exit 0; }' then echo "stat -D test [Failed - validation failed]" cat "${stat_output}" err=1 return fi echo "stat -D test [Success]"}
test_default_stattest_null_stattest_offline_cpu_stattest_stat_record_reporttest_stat_record_scripttest_stat_repeat_weak_groupstest_topdown_groupstest_topdown_weak_groupstest_cputypetest_hybridtest_stat_cputest_stat_no_aggrtest_stat_detailedtest_stat_repeattest_stat_pidtest_stat_delay
cleanupexit $err