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