114 lines · bash
1#!/bin/sh2# Check Arm SPE trace data recording and synthesized samples3 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 with6# 'perf script' and 'perf report' commands.7 8# SPDX-License-Identifier: GPL-2.09# German Gomez <german.gomez@arm.com>, 202110 11skip_if_no_arm_spe_event() {12 perf list | grep -E -q 'arm_spe_[0-9]+//' && return 013 14 # arm_spe event doesn't exist15 return 216}17 18skip_if_no_arm_spe_event || exit 219 20perfdata=$(mktemp /tmp/__perf_test.perf.data.XXXXX)21glb_err=022 23cleanup_files()24{25 rm -f ${perfdata}26 rm -f ${perfdata}.old27 exit $glb_err28}29 30trap cleanup_files EXIT TERM INT31 32arm_spe_report() {33 if [ $2 = 0 ]; then34 echo "$1: PASS"35 elif [ $2 = 2 ]; then36 echo "$1: SKIPPED"37 else38 echo "$1: FAIL"39 glb_err=$240 fi41}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>&155}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_addr62 # 7.71% 7.71% dd libc-2.27.so [.] getenv63 # 2.59% 2.59% dd ld-2.27.so [.] strcmp64 perf report --stdio -i ${perfdata} 2>&1 | \65 grep -E " +[0-9]+\.[0-9]+% +[0-9]+\.[0-9]+% +$1 " > /dev/null 2>&166}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 program75 sleep 176 77 # Send signal to snapshot trace data78 kill -USR2 $PERFPID79 80 # Stop perf program81 kill $PERFPID82 wait $PERFPID83 84 perf_script_samples dd &&85 perf_report_samples dd86 87 err=$?88 arm_spe_report "SPE snapshot testing" $err89}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>&195 if [ $? != 0 ]; then96 arm_spe_report "SPE system-wide testing" 297 return98 fi99 100 perf record -o ${perfdata} -e arm_spe// -a --no-bpf-event \101 -- dd if=/dev/zero of=/dev/null count=100000 > /dev/null 2>&1102 103 perf_script_samples dd &&104 perf_report_samples dd105 106 err=$?107 arm_spe_report "SPE system-wide testing" $err108}109 110arm_spe_snapshot_test111arm_spe_system_wide_test112 113exit $glb_err114