tools/testing/selftests/ftrace/test.d/ftrace/func_cpumask.tc

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 # description: ftrace - function trace with cpumask
   4
   5 if ! which nproc ; then
   6   nproc() {
   7     ls -d /sys/devices/system/cpu/cpu[0-9]* | wc -l
   8   }
   9 fi
  10
  11 NP=`nproc`
  12
  13 if [ $NP -eq 1 ] ;then
  14   echo "We can not test cpumask on UP environment"
  15   exit_unresolved
  16 fi
  17
  18 if ! grep -q "function" available_tracers ; then
  19   echo "Function trace is not enabled"
  20   exit_unsupported
  21 fi
  22
  23 ORIG_CPUMASK=`cat tracing_cpumask`
  24
  25 do_reset() {
  26   echo $ORIG_CPUMASK > tracing_cpumask
  27 }
  28
  29 echo 0 > tracing_on
  30 echo > trace
  31 : "Bitmask only record on CPU1"
  32 echo 2 > tracing_cpumask
  33 MASK=0x`cat tracing_cpumask`
  34 test `printf "%d" $MASK` -eq 2 || do_reset
  35
  36 echo function > current_tracer
  37 echo 1 > tracing_on
  38 (echo "forked")
  39 echo 0 > tracing_on
  40
  41 : "Check CPU1 events are recorded"
  42 grep -q -e "\[001\]" trace || do_reset
  43
  44 : "There should be No other cpu events"
  45 ! grep -qv -e "\[001\]" -e "^#" trace || do_reset
  46
  47 do_reset