#!/bin/sh # perf stat tests # SPDX-License-Identifier: GPL-2.0 set -e err=0 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_stat_record_report() { echo "stat record and report test" if ! perf stat record -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 -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 if perf stat -e '{slots,topdown-retiring}' true 2>&1 | grep -E -q "" then echo "Topdown event group test [Failed events not supported]" err=1 return fi if perf stat -e 'instructions,topdown-retiring,slots' true 2>&1 | grep -E -q "" then echo "Topdown event group test [Failed slots not reordered first in no-group case]" err=1 return fi if perf stat -e '{instructions,topdown-retiring,slots}' true 2>&1 | grep -E -q "" then echo "Topdown event group test [Failed slots not reordered first in single group case]" err=1 return fi if perf stat -e '{instructions,slots},topdown-retiring' true 2>&1 | grep -E -q "" then echo "Topdown event group test [Failed topdown metrics event not move into slots group]" err=1 return fi if perf stat -e '{instructions,slots},{topdown-retiring}' true 2>&1 | grep -E -q "" then echo "Topdown event group test [Failed topdown metrics group not merge into slots group]" err=1 return fi if perf stat -e '{instructions,r400,r8000}' true 2>&1 | grep -E -q "" then echo "Topdown event group test [Failed raw format slots not reordered first]" err=1 return fi echo "Topdown event group test [Success]" } 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 "" 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 -- true 2>&1 | grep -E "/cycles/[uH]*| cycles[:uH]* " -c) # 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_default_stat test_stat_record_report test_stat_record_script test_stat_repeat_weak_groups test_topdown_groups test_topdown_weak_groups test_cputype test_hybrid exit $err