1#!/bin/bash 2# perf kvm tests 3# SPDX-License-Identifier: GPL-2.0 4 5set -e 6 7err=0 8perfdata=$(mktemp /tmp/__perf_kvm_test.perf.data.XXXXX) 9qemu_pid_file=$(mktemp /tmp/__perf_kvm_test.qemu.pid.XXXXX) 10log_file=$(mktemp /tmp/__perf_kvm_test.live_log.XXXXX) 11 12cleanup() { 13 rm -f "${perfdata}" "${log_file}" 14 if [ -f "${qemu_pid_file}" ]; then 15 if [ -s "${qemu_pid_file}" ]; then 16 qemu_pid=$(cat "${qemu_pid_file}") 17 if [ -n "${qemu_pid}" ]; then 18 kill "${qemu_pid}" 2>/dev/null || true 19 fi 20 fi 21 rm -f "${qemu_pid_file}" 22 fi 23 trap - EXIT TERM INT 24} 25 26trap_cleanup() { 27 echo "Unexpected signal in ${FUNCNAME[1]}" 28 cleanup 29 exit 1 30} 31trap trap_cleanup EXIT TERM INT 32 33skip() { 34 echo "Skip: $1" 35 cleanup 36 exit 2 37} 38 39test_kvm_stat() { 40 echo "Testing perf kvm stat" 41 42 local duration 43 local success=false 44 for duration in 1 2 4 8; do 45 echo "Recording kvm events for pid ${qemu_pid} (duration ${duration}s)..." 46 rm -f "${perfdata}" "${perfdata}".old 47 if ! perf kvm stat record -p "${qemu_pid}" -o "${perfdata}" \ 48 sleep ${duration} >/dev/null 2>&1; then 49 echo "perf kvm stat record failed, retrying..." 50 continue 51 fi 52 53 if [ -e "${perfdata}" ] && \ 54 perf kvm -i "${perfdata}" stat report 2>&1 | grep -q "VM-EXIT"; then 55 success=true 56 break 57 fi 58 echo "No VM-EXIT events found, retrying..." 59 done 60 61 if [ "$success" = false ]; then 62 echo "Failed to find VM-EXIT in report" 63 perf kvm -i "${perfdata}" stat report 2>&1 || true 64 err=1 65 return 66 fi 67 68 echo "perf kvm stat test [Success]" 69} 70 71test_kvm_record_report() { 72 echo "Testing perf kvm record/report" 73 74 local duration 75 local success=false 76 for duration in 1 2 4 8; do 77 echo "Recording kvm profile for pid ${qemu_pid} (duration ${duration}s)..." 78 rm -f "${perfdata}" "${perfdata}".old 79 80 perf kvm --host record -p "${qemu_pid}" -o "${perfdata}" \ 81 -e cpu-clock sleep ${duration} 82 83 if [ -e "${perfdata}" ] && \ 84 perf kvm -i "${perfdata}" report --stdio 2>&1 | grep -q "Event count"; then 85 success=true 86 break 87 fi 88 echo "No samples or report failed, retrying..." 89 done 90 91 if [ "$success" = false ]; then 92 echo "Failed to report kvm profile" 93 perf kvm -i "${perfdata}" report --stdio 2>&1 || true 94 err=1 95 return 96 fi 97 98 echo "perf kvm record/report test [Success]" 99} 100 101test_kvm_buildid_list() { 102 echo "Testing perf kvm buildid-list" 103 104 # We reuse the perf.data from the previous record test 105 if ! perf kvm --host -i "${perfdata}" buildid-list 2>&1 | grep -q "."; then 106 echo "Failed to list buildids" 107 perf kvm --host -i "${perfdata}" buildid-list 2>&1 108 err=1 109 return 110 fi 111 112 echo "perf kvm buildid-list test [Success]" 113} 114 115test_kvm_stat_live() { 116 echo "Testing perf kvm stat live" 117 118 # Run perf kvm live for 5 seconds, monitoring that PID 119 # Use sleep to keep stdin open but silent, preventing EOF loop or interactive spam 120 if ! sleep 10 | timeout 5s perf kvm stat live -p "${qemu_pid}" > "${log_file}" 2>&1; then 121 retval=$? 122 if [ $retval -ne 124 ] && [ $retval -ne 0 ]; then 123 echo "perf kvm stat live [Failed: perf kvm stat live failed to start or run (ret=$retval)]" 124 head -n 50 "${log_file}" 125 err=1 126 return 127 fi 128 fi 129 130 # Check for some sample data (percentage) 131 if ! grep -E -q "[0-9]+\.[0-9]+%" "${log_file}"; then 132 echo "perf kvm stat live [Failed: no sample percentage found]" 133 head -n 50 "${log_file}" 134 err=1 135 return 136 fi 137 138 echo "perf kvm stat live test [Success]" 139} 140 141setup_qemu() { 142 # Find qemu 143 if [ "$(uname -m)" = "x86_64" ]; then 144 qemu="qemu-system-x86_64" 145 elif [ "$(uname -m)" = "aarch64" ]; then 146 qemu="qemu-system-aarch64" 147 elif [ "$(uname -m)" = "s390x" ]; then 148 qemu="qemu-system-s390x" 149 elif [ "$(uname -m)" = "ppc64le" ]; then 150 qemu="qemu-system-ppc64" 151 else 152 qemu="qemu-system-$(uname -m)" 153 fi 154 155 if ! which -s "$qemu"; then 156 skip "$qemu not found" 157 fi 158 159 if [ ! -r /dev/kvm ] || [ ! -w /dev/kvm ]; then 160 skip "/dev/kvm not accessible" 161 fi 162 163 if ! perf kvm stat record -o /dev/null -a sleep 0.01 >/dev/null 2>&1; then 164 skip "No permission to record kvm events" 165 fi 166 167 echo "Starting $qemu..." 168 # Start qemu in background, detached, with pidfile 169 # We use -display none -daemonize and a monitor to keep it alive/controllable if needed 170 # We don't need a real kernel, just KVM active. 171 if ! $qemu -enable-kvm -display none -daemonize -pidfile "${qemu_pid_file}" -monitor none; then 172 echo "Failed to start qemu" 173 err=1 174 return 175 fi 176 177 # Wait a bit for qemu to start 178 sleep 1 179 qemu_pid=$(cat "${qemu_pid_file}") 180 181 if ! kill -0 "${qemu_pid}" 2>/dev/null; then 182 echo "Qemu process failed to stay alive" 183 err=1 184 return 185 fi 186} 187 188setup_qemu 189if [ $err -eq 0 ]; then 190 test_kvm_stat 191 test_kvm_record_report 192 test_kvm_buildid_list 193 test_kvm_stat_live 194fi 195 196cleanup 197exit $err 198