diff options
| -rwxr-xr-x | tools/perf/tests/shell/test_arm_spe.sh | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/tools/perf/tests/shell/test_arm_spe.sh b/tools/perf/tests/shell/test_arm_spe.sh new file mode 100755 index 000000000000..e59044edc406 --- /dev/null +++ b/tools/perf/tests/shell/test_arm_spe.sh @@ -0,0 +1,89 @@ +#!/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} + exit $glb_err +} + +trap cleanup_files exit term int + +arm_spe_report() { + if [ $2 != 0 ]; then + echo "$1: FAIL" + glb_err=$2 + else + echo "$1: PASS" + 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_snapshot_test +exit $glb_err |