1#!/bin/sh 2# Check Arm SPE trace data recording and synthesized samples (exclusive) 3 4# Uses the 'perf record' to record trace data of Arm SPE events; 5# then verify if any SPE event samples are generated by SPE with 6# 'perf script' and 'perf report' commands. 7 8# SPDX-License-Identifier: GPL-2.0 9# German Gomez <german.gomez@arm.com>, 2021 10 11skip_if_no_arm_spe_event() { 12 perf list pmu | grep -E -q 'arm_spe_[0-9]+//' && return 0 13 14 # arm_spe event doesn't exist 15 return 2 16} 17 18skip_if_no_arm_spe_event || exit 2 19 20perfdata=$(mktemp /tmp/__perf_test.perf.data.XXXXX) 21glb_err=0 22 23cleanup_files() 24{ 25 rm -f ${perfdata} 26 rm -f ${perfdata}.old 27 exit $glb_err 28} 29 30trap cleanup_files EXIT TERM INT 31 32arm_spe_report() { 33 if [ $2 = 0 ]; then 34 echo "$1: PASS" 35 elif [ $2 = 2 ]; then 36 echo "$1: SKIPPED" 37 else 38 echo "$1: FAIL" 39 glb_err=$2 40 fi 41} 42 43perf_script_samples() { 44 echo "Looking at perf.data file for dumping samples:" 45 46 # from arm-spe.c/arm_spe_synth_events() 47 events="(ld1-miss|ld1-access|llc-miss|lld-access|tlb-miss|tlb-access|branch-miss|remote-access|memory)" 48 49 # Below is an example of the samples dumping: 50 # dd 3048 [002] 1 l1d-access: ffffaa64999c __GI___libc_write+0x3c (/lib/aarch64-linux-gnu/libc-2.27.so) 51 # dd 3048 [002] 1 tlb-access: ffffaa64999c __GI___libc_write+0x3c (/lib/aarch64-linux-gnu/libc-2.27.so) 52 # dd 3048 [002] 1 memory: ffffaa64999c __GI___libc_write+0x3c (/lib/aarch64-linux-gnu/libc-2.27.so) 53 perf script -F,-time -i ${perfdata} 2>&1 | \ 54 grep -E " +$1 +[0-9]+ .* +${events}:(.*:)? +" > /dev/null 2>&1 55} 56 57perf_report_samples() { 58 echo "Looking at perf.data file for reporting samples:" 59 60 # Below is an example of the samples reporting: 61 # 73.04% 73.04% dd libc-2.27.so [.] _dl_addr 62 # 7.71% 7.71% dd libc-2.27.so [.] getenv 63 # 2.59% 2.59% dd ld-2.27.so [.] strcmp 64 perf report --stdio -i ${perfdata} 2>&1 | \ 65 grep -E " +[0-9]+\.[0-9]+% +[0-9]+\.[0-9]+% +$1 " > /dev/null 2>&1 66} 67 68arm_spe_snapshot_test() { 69 echo "Recording trace with snapshot mode $perfdata" 70 perf record -o ${perfdata} -e arm_spe// -S \ 71 -- dd if=/dev/zero of=/dev/null > /dev/null 2>&1 & 72 PERFPID=$! 73 74 # Wait for perf program 75 sleep 1 76 77 # Send signal to snapshot trace data 78 kill -USR2 $PERFPID 79 80 # Stop perf program 81 kill $PERFPID 82 wait $PERFPID 83 84 perf_script_samples dd && 85 perf_report_samples dd 86 87 err=$? 88 arm_spe_report "SPE snapshot testing" $err 89} 90 91arm_spe_system_wide_test() { 92 echo "Recording trace with system-wide mode $perfdata" 93 94 perf record -o - -e dummy -a -B true > /dev/null 2>&1 95 if [ $? != 0 ]; then 96 arm_spe_report "SPE system-wide testing" 2 97 return 98 fi 99 100 perf record -o ${perfdata} -e arm_spe// -a --no-bpf-event \ 101 -- dd if=/dev/zero of=/dev/null count=100000 > /dev/null 2>&1 102 103 perf_script_samples dd && 104 perf_report_samples dd 105 106 err=$? 107 arm_spe_report "SPE system-wide testing" $err 108} 109 110arm_spe_snapshot_test 111arm_spe_system_wide_test 112 113exit $glb_err 114