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authorGerman Gomez <german.gomez@arm.com>2021-11-09 19:30:09 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2021-11-14 00:11:50 +0300
commit6b1b208bef5b9a53a591f13df98f72435b69c3e8 (patch)
tree1cc4fdf9edf1fc34632caa8ba8e206d6c9814aea
parent56c31cdff7c2a640f4afcfe0ac4e4ca6dc47c5fd (diff)
downloadlinux-6b1b208bef5b9a53a591f13df98f72435b69c3e8.tar.xz
perf arm-spe: Snapshot mode test
Shell script test_arm_spe.sh has been added to test the recording of SPE tracing events in snapshot mode. Reviewed-by: Leo Yan <leo.yan@linaro.org> Signed-off-by: German Gomez <german.gomez@arm.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: John Garry <john.garry@huawei.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Will Deacon <will@kernel.org> Cc: linux-arm-kernel@lists.infradead.org Link: https://lore.kernel.org/r/20211109163009.92072-4-german.gomez@arm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-rwxr-xr-xtools/perf/tests/shell/test_arm_spe.sh89
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