1#!/bin/sh 2# Check Arm SPE trace data recording and synthesized samples 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 | egrep -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 exit $glb_err 27} 28 29trap cleanup_files exit term int 30 31arm_spe_report() { 32 if [ $2 != 0 ]; then 33 echo "$1: FAIL" 34 glb_err=$2 35 else 36 echo "$1: PASS" 37 fi 38} 39 40perf_script_samples() { 41 echo "Looking at perf.data file for dumping samples:" 42 43 # from arm-spe.c/arm_spe_synth_events() 44 events="(ld1-miss|ld1-access|llc-miss|lld-access|tlb-miss|tlb-access|branch-miss|remote-access|memory)" 45 46 # Below is an example of the samples dumping: 47 # dd 3048 [002] 1 l1d-access: ffffaa64999c __GI___libc_write+0x3c (/lib/aarch64-linux-gnu/libc-2.27.so) 48 # dd 3048 [002] 1 tlb-access: ffffaa64999c __GI___libc_write+0x3c (/lib/aarch64-linux-gnu/libc-2.27.so) 49 # dd 3048 [002] 1 memory: ffffaa64999c __GI___libc_write+0x3c (/lib/aarch64-linux-gnu/libc-2.27.so) 50 perf script -F,-time -i ${perfdata} 2>&1 | \ 51 egrep " +$1 +[0-9]+ .* +${events}:(.*:)? +" > /dev/null 2>&1 52} 53 54perf_report_samples() { 55 echo "Looking at perf.data file for reporting samples:" 56 57 # Below is an example of the samples reporting: 58 # 73.04% 73.04% dd libc-2.27.so [.] _dl_addr 59 # 7.71% 7.71% dd libc-2.27.so [.] getenv 60 # 2.59% 2.59% dd ld-2.27.so [.] strcmp 61 perf report --stdio -i ${perfdata} 2>&1 | \ 62 egrep " +[0-9]+\.[0-9]+% +[0-9]+\.[0-9]+% +$1 " > /dev/null 2>&1 63} 64 65arm_spe_snapshot_test() { 66 echo "Recording trace with snapshot mode $perfdata" 67 perf record -o ${perfdata} -e arm_spe// -S \ 68 -- dd if=/dev/zero of=/dev/null > /dev/null 2>&1 & 69 PERFPID=$! 70 71 # Wait for perf program 72 sleep 1 73 74 # Send signal to snapshot trace data 75 kill -USR2 $PERFPID 76 77 # Stop perf program 78 kill $PERFPID 79 wait $PERFPID 80 81 perf_script_samples dd && 82 perf_report_samples dd 83 84 err=$? 85 arm_spe_report "SPE snapshot testing" $err 86} 87 88arm_spe_snapshot_test 89exit $glb_err 90