248 lines · bash
1#!/bin/bash2# perf record tests3# SPDX-License-Identifier: GPL-2.04 5set -e6 7shelldir=$(dirname "$0")8# shellcheck source=lib/waiting.sh9. "${shelldir}"/lib/waiting.sh10 11# shellcheck source=lib/perf_has_symbol.sh12. "${shelldir}"/lib/perf_has_symbol.sh13 14testsym="test_loop"15 16skip_test_missing_symbol ${testsym}17 18err=019perfdata=$(mktemp /tmp/__perf_test.perf.data.XXXXX)20testprog="perf test -w thloop"21cpu_pmu_dir="/sys/bus/event_source/devices/cpu*"22br_cntr_file="/caps/branch_counter_nr"23br_cntr_output="branch stack counters"24br_cntr_script_output="br_cntr: A"25 26default_fd_limit=$(ulimit -Sn)27# With option --threads=cpu the number of open file descriptors should be28# equal to sum of: nmb_cpus * nmb_events (2+dummy),29# nmb_threads for perf.data.n (equal to nmb_cpus) and30# 2*nmb_cpus of pipes = 4*nmb_cpus (each pipe has 2 ends)31# All together it needs 8*nmb_cpus file descriptors plus some are also used32# outside of testing, thus raising the limit to 16*nmb_cpus33min_fd_limit=$(($(getconf _NPROCESSORS_ONLN) * 16))34 35cleanup() {36 rm -rf "${perfdata}"37 rm -rf "${perfdata}".old38 39 trap - EXIT TERM INT40}41 42trap_cleanup() {43 cleanup44 exit 145}46trap trap_cleanup EXIT TERM INT47 48test_per_thread() {49 echo "Basic --per-thread mode test"50 if ! perf record -o /dev/null --quiet ${testprog} 2> /dev/null51 then52 echo "Per-thread record [Skipped event not supported]"53 return54 fi55 if ! perf record --per-thread -o "${perfdata}" ${testprog} 2> /dev/null56 then57 echo "Per-thread record [Failed record]"58 err=159 return60 fi61 if ! perf report -i "${perfdata}" -q | grep -q "${testsym}"62 then63 echo "Per-thread record [Failed missing output]"64 err=165 return66 fi67 68 # run the test program in background (for 30 seconds)69 ${testprog} 30 &70 TESTPID=$!71 72 rm -f "${perfdata}"73 74 wait_for_threads ${TESTPID} 275 perf record -p "${TESTPID}" --per-thread -o "${perfdata}" sleep 1 2> /dev/null76 kill ${TESTPID}77 78 if [ ! -e "${perfdata}" ]79 then80 echo "Per-thread record [Failed record -p]"81 err=182 return83 fi84 if ! perf report -i "${perfdata}" -q | grep -q "${testsym}"85 then86 echo "Per-thread record [Failed -p missing output]"87 err=188 return89 fi90 91 echo "Basic --per-thread mode test [Success]"92}93 94test_register_capture() {95 echo "Register capture test"96 if ! perf list | grep -q 'br_inst_retired.near_call'97 then98 echo "Register capture test [Skipped missing event]"99 return100 fi101 if ! perf record --intr-regs=\? 2>&1 | grep -q 'available registers: AX BX CX DX SI DI BP SP IP FLAGS CS SS R8 R9 R10 R11 R12 R13 R14 R15'102 then103 echo "Register capture test [Skipped missing registers]"104 return105 fi106 if ! perf record -o - --intr-regs=di,r8,dx,cx -e br_inst_retired.near_call \107 -c 1000 --per-thread ${testprog} 2> /dev/null \108 | perf script -F ip,sym,iregs -i - 2> /dev/null \109 | grep -q "DI:"110 then111 echo "Register capture test [Failed missing output]"112 err=1113 return114 fi115 echo "Register capture test [Success]"116}117 118test_system_wide() {119 echo "Basic --system-wide mode test"120 if ! perf record -aB --synth=no -o "${perfdata}" ${testprog} 2> /dev/null121 then122 echo "System-wide record [Skipped not supported]"123 return124 fi125 if ! perf report -i "${perfdata}" -q | grep -q "${testsym}"126 then127 echo "System-wide record [Failed missing output]"128 err=1129 return130 fi131 if ! perf record -aB --synth=no -e cpu-clock,cs --threads=cpu \132 -o "${perfdata}" ${testprog} 2> /dev/null133 then134 echo "System-wide record [Failed record --threads option]"135 err=1136 return137 fi138 if ! perf report -i "${perfdata}" -q | grep -q "${testsym}"139 then140 echo "System-wide record [Failed --threads missing output]"141 err=1142 return143 fi144 echo "Basic --system-wide mode test [Success]"145}146 147test_workload() {148 echo "Basic target workload test"149 if ! perf record -o "${perfdata}" ${testprog} 2> /dev/null150 then151 echo "Workload record [Failed record]"152 err=1153 return154 fi155 if ! perf report -i "${perfdata}" -q | grep -q "${testsym}"156 then157 echo "Workload record [Failed missing output]"158 err=1159 return160 fi161 if ! perf record -e cpu-clock,cs --threads=package \162 -o "${perfdata}" ${testprog} 2> /dev/null163 then164 echo "Workload record [Failed record --threads option]"165 err=1166 return167 fi168 if ! perf report -i "${perfdata}" -q | grep -q "${testsym}"169 then170 echo "Workload record [Failed --threads missing output]"171 err=1172 return173 fi174 echo "Basic target workload test [Success]"175}176 177test_branch_counter() {178 echo "Branch counter test"179 # Check if the branch counter feature is supported180 for dir in $cpu_pmu_dir181 do182 if [ ! -e "$dir$br_cntr_file" ]183 then184 echo "branch counter feature not supported on all core PMUs ($dir) [Skipped]"185 return186 fi187 done188 if ! perf record -o "${perfdata}" -e "{branches:p,instructions}" -j any,counter ${testprog} 2> /dev/null189 then190 echo "Branch counter record test [Failed record]"191 err=1192 return193 fi194 if ! perf report -i "${perfdata}" -D -q | grep -q "$br_cntr_output"195 then196 echo "Branch counter report test [Failed missing output]"197 err=1198 return199 fi200 if ! perf script -i "${perfdata}" -F +brstackinsn,+brcntr | grep -q "$br_cntr_script_output"201 then202 echo " Branch counter script test [Failed missing output]"203 err=1204 return205 fi206 echo "Branch counter test [Success]"207}208 209test_cgroup() {210 echo "Cgroup sampling test"211 if ! perf record -aB --synth=cgroup --all-cgroups -o "${perfdata}" ${testprog} 2> /dev/null212 then213 echo "Cgroup sampling [Skipped not supported]"214 return215 fi216 if ! perf report -i "${perfdata}" -D | grep -q "CGROUP"217 then218 echo "Cgroup sampling [Failed missing output]"219 err=1220 return221 fi222 if ! perf script -i "${perfdata}" -F cgroup | grep -q -v "unknown"223 then224 echo "Cgroup sampling [Failed cannot resolve cgroup names]"225 err=1226 return227 fi228 echo "Cgroup sampling test [Success]"229}230 231# raise the limit of file descriptors to minimum232if [[ $default_fd_limit -lt $min_fd_limit ]]; then233 ulimit -Sn $min_fd_limit234fi235 236test_per_thread237test_register_capture238test_system_wide239test_workload240test_branch_counter241test_cgroup242 243# restore the default value244ulimit -Sn $default_fd_limit245 246cleanup247exit $err248