tools/perf/tests/shell/test_arm_spe_fork.sh

   1 #!/bin/sh
   2 # Check Arm SPE doesn't hang when there are forks
   3
   4 # SPDX-License-Identifier: GPL-2.0
   5 # German Gomez <german.gomez@arm.com>, 2022
   6
   7 skip_if_no_arm_spe_event() {
   8         perf list pmu | grep -E -q 'arm_spe_[0-9]+//' && return 0
   9         return 2
  10 }
  11
  12 skip_if_no_arm_spe_event || exit 2
  13
  14 TEST_PROGRAM="perf test -w sqrtloop 10"
  15 PERF_DATA=$(mktemp /tmp/__perf_test.perf.data.XXXXX)
  16 PERF_RECORD_LOG=$(mktemp /tmp/__perf_test.log.XXXXX)
  17
  18 cleanup_files()
  19 {
  20         echo "Cleaning up files..."
  21         rm -f ${PERF_RECORD_LOG}
  22         rm -f ${PERF_DATA}
  23 }
  24
  25 trap cleanup_files EXIT TERM INT
  26
  27 echo "Recording workload..."
  28 perf record -o ${PERF_DATA} -e arm_spe/period=65536/ -vvv -- $TEST_PROGRAM > ${PERF_RECORD_LOG} 2>&1 &
  29 PERFPID=$!
  30
  31 # Check if perf hangs by checking the perf-record logs.
  32 sleep 1
  33 log0=$(wc -l $PERF_RECORD_LOG)
  34 echo Log lines = $log0
  35 sleep 1
  36 log1=$(wc -l $PERF_RECORD_LOG)
  37 echo Log lines after 1 second = $log1
  38
  39 kill $PERFPID
  40 wait $PERFPID
  41
  42 if [ "$log0" = "$log1" ];
  43 then
  44         echo "SPE hang test: FAIL"
  45         exit 1
  46 else
  47         echo "SPE hang test: PASS"
  48 fi
  49
  50 exit 0