Messages in this thread Patch in this message | | | Subject | Re: [PATCH 5/5] perf arm-spe: Snapshot mode test | From | German Gomez <> | Date | Wed, 20 Oct 2021 16:06:51 +0100 |
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Hi Leo,
I'm unable to reproduce. I've tried on top of the most recent perf/core branch but I still get exit code 0 consistently:
$ git log commit be8ecc57f180415e8a7c1cc5620c5236be2a7e56 (grafted, origin/perf/core) Author: Tony Garnock-Jones <tonyg@leastfixedpoint.com> Date: Thu Sep 16 14:09:39 2021 +0200
$ ./perf test 88 -v Couldn't bump rlimit(MEMLOCK), failures may take place when creating BPF maps, etc 88: Check Arm SPE trace data recording and synthesized samples : --- start --- test child forked, pid 18700 Recording trace with snapshot mode /tmp/__perf_test.perf.data.xgsUt Looking at perf.data file for dumping samples: Looking at perf.data file for reporting samples: SPE snapshot testing: PASS test child finished with 0 ---- end ---- Check Arm SPE trace data recording and synthesized samples: Ok
On 20/10/2021 14:13, Leo Yan wrote: > On Thu, Sep 16, 2021 at 04:46:35PM +0100, German Gomez wrote: >> Shell script test_arm_spe.sh has been added to test the recording of SPE >> tracing events in snapshot mode. >> >> Reviewed-by: James Clark <james.clark@arm.com> >> Signed-off-by: German Gomez <german.gomez@arm.com> >> --- >> tools/perf/tests/shell/test_arm_spe.sh | 91 ++++++++++++++++++++++++++ >> 1 file changed, 91 insertions(+) >> create mode 100755 tools/perf/tests/shell/test_arm_spe.sh >> >> 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..9ed817e76f95 >> --- /dev/null >> +++ b/tools/perf/tests/shell/test_arm_spe.sh >> @@ -0,0 +1,91 @@ >> +#!/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} >> + trap - exit term int >> + kill -2 $$ # Forward sigint to parent > I understand you copy this code from Arm cs-etm testing, but I found > the sentence 'kill -2 $$' will cause a failure at my side with the > command: > root@ubuntu:/home/leoy/linux/tools/perf# ./perf test 85 -v > 85: Check Arm SPE trace data recording and synthesized samples : > --- start --- > test child forked, pid 29053 > Recording trace with snapshot mode /tmp/__perf_test.perf.data.uughb > Looking at perf.data file for dumping samples: > Looking at perf.data file for reporting samples: > SPE snapshot testing: PASS > test child finished with -1 > ---- end ---- > Check Arm SPE trace data recording and synthesized samples: FAILED! > > I changed to use below code and looks it works for me: > > if [[ "$1" == "int" ]]; then > kill -SIGINT $$ > fi > if [[ "$1" == "term" ]]; then > kill -SIGTERM $$ > fi > > Thanks, > Leo > >> + 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 >> \ No newline at end of file >> -- >> 2.17.1 >>
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