tools/perf/tests/shell/record_sideband.sh

   1 #!/bin/sh
   2 # perf record sideband tests
   3 # SPDX-License-Identifier: GPL-2.0
   4
   5 set -e
   6
   7 err=0
   8 perfdata=$(mktemp /tmp/__perf_test.perf.data.XXXXX)
   9
  10 cleanup()
  11 {
  12     rm -rf ${perfdata}
  13     trap - EXIT TERM INT
  14 }
  15
  16 trap_cleanup()
  17 {
  18     cleanup
  19     exit 1
  20 }
  21 trap trap_cleanup EXIT TERM INT
  22
  23 can_cpu_wide()
  24 {
  25     if ! perf record -o ${perfdata} -BN --no-bpf-event -C $1 true > /dev/null 2>&1
  26     then
  27         echo "record sideband test [Skipped cannot record cpu$1]"
  28         err=2
  29     fi
  30
  31     rm -f ${perfdata}
  32     return $err
  33 }
  34
  35 test_system_wide_tracking()
  36 {
  37     # Need CPU 0 and CPU 1
  38     can_cpu_wide 0 || return 0
  39     can_cpu_wide 1 || return 0
  40
  41     # Record on CPU 0 a task running on CPU 1
  42     perf record -BN --no-bpf-event -o ${perfdata} -C 0 -- taskset --cpu-list 1 true
  43
  44     # Should get MMAP events from CPU 1
  45     mmap_cnt=`perf script -i ${perfdata} --show-mmap-events -C 1 2>/dev/null | grep MMAP | wc -l`
  46
  47     if [ ${mmap_cnt} -gt 0 ] ; then
  48         return 0
  49     fi
  50
  51     echo "Failed to record MMAP events on CPU 1 when tracing CPU 0"
  52     return 1
  53 }
  54
  55 test_system_wide_tracking
  56
  57 cleanup
  58 exit $err