114 lines
2.9 KiB
Bash
114 lines
2.9 KiB
Bash
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#!/bin/sh
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# Check Arm SPE trace data recording and synthesized samples
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# Uses the 'perf record' to record trace data of Arm SPE events;
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# then verify if any SPE event samples are generated by SPE with
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# 'perf script' and 'perf report' commands.
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# SPDX-License-Identifier: GPL-2.0
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# German Gomez <german.gomez@arm.com>, 2021
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skip_if_no_arm_spe_event() {
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perf list | egrep -q 'arm_spe_[0-9]+//' && return 0
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# arm_spe event doesn't exist
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return 2
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}
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skip_if_no_arm_spe_event || exit 2
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perfdata=$(mktemp /tmp/__perf_test.perf.data.XXXXX)
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glb_err=0
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cleanup_files()
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{
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rm -f ${perfdata}
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rm -f ${perfdata}.old
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exit $glb_err
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}
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trap cleanup_files exit term int
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arm_spe_report() {
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if [ $2 = 0 ]; then
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echo "$1: PASS"
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elif [ $2 = 2 ]; then
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echo "$1: SKIPPED"
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else
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echo "$1: FAIL"
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glb_err=$2
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fi
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}
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perf_script_samples() {
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echo "Looking at perf.data file for dumping samples:"
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# from arm-spe.c/arm_spe_synth_events()
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events="(ld1-miss|ld1-access|llc-miss|lld-access|tlb-miss|tlb-access|branch-miss|remote-access|memory)"
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# Below is an example of the samples dumping:
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# dd 3048 [002] 1 l1d-access: ffffaa64999c __GI___libc_write+0x3c (/lib/aarch64-linux-gnu/libc-2.27.so)
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# dd 3048 [002] 1 tlb-access: ffffaa64999c __GI___libc_write+0x3c (/lib/aarch64-linux-gnu/libc-2.27.so)
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# dd 3048 [002] 1 memory: ffffaa64999c __GI___libc_write+0x3c (/lib/aarch64-linux-gnu/libc-2.27.so)
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perf script -F,-time -i ${perfdata} 2>&1 | \
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egrep " +$1 +[0-9]+ .* +${events}:(.*:)? +" > /dev/null 2>&1
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}
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perf_report_samples() {
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echo "Looking at perf.data file for reporting samples:"
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# Below is an example of the samples reporting:
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# 73.04% 73.04% dd libc-2.27.so [.] _dl_addr
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# 7.71% 7.71% dd libc-2.27.so [.] getenv
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# 2.59% 2.59% dd ld-2.27.so [.] strcmp
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perf report --stdio -i ${perfdata} 2>&1 | \
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egrep " +[0-9]+\.[0-9]+% +[0-9]+\.[0-9]+% +$1 " > /dev/null 2>&1
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}
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arm_spe_snapshot_test() {
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echo "Recording trace with snapshot mode $perfdata"
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perf record -o ${perfdata} -e arm_spe// -S \
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-- dd if=/dev/zero of=/dev/null > /dev/null 2>&1 &
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PERFPID=$!
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# Wait for perf program
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sleep 1
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# Send signal to snapshot trace data
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kill -USR2 $PERFPID
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# Stop perf program
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kill $PERFPID
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wait $PERFPID
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perf_script_samples dd &&
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perf_report_samples dd
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err=$?
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arm_spe_report "SPE snapshot testing" $err
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}
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arm_spe_system_wide_test() {
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echo "Recording trace with system-wide mode $perfdata"
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perf record -o - -e dummy -a -B true > /dev/null 2>&1
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if [ $? != 0 ]; then
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arm_spe_report "SPE system-wide testing" 2
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return
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fi
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perf record -o ${perfdata} -e arm_spe// -a --no-bpf-event \
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-- dd if=/dev/zero of=/dev/null count=100000 > /dev/null 2>&1
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perf_script_samples dd &&
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perf_report_samples dd
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err=$?
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arm_spe_report "SPE system-wide testing" $err
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}
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arm_spe_snapshot_test
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arm_spe_system_wide_test
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exit $glb_err
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