tools/perf/tests/shell/test_arm_spe.sh

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