Commit 9575ecdd authored by Namhyung Kim's avatar Namhyung Kim Committed by Arnaldo Carvalho de Melo
Browse files

perf test: Add perf record sample filtering test 



  $ sudo ./perf test 'sample filter' -v
   94: perf record sample filtering (by BPF) tests                     :
  --- start ---
  test child forked, pid 3817527
  Checking BPF-filter privilege
  Basic bpf-filter test
  Basic bpf-filter test [Success]
  Failing bpf-filter test
  Error: task-clock event does not have PERF_SAMPLE_CPU
  Failing bpf-filter test [Success]
  Group bpf-filter test
  Error: task-clock event does not have PERF_SAMPLE_CPU
  Error: task-clock event does not have PERF_SAMPLE_CODE_PAGE_SIZE
  Group bpf-filter test [Success]
  test child finished with 0
  ---- end ----
  perf record sample filtering (by BPF) tests: Ok

Reviewed-by: default avatarIan Rogers <irogers@google.com>
Signed-off-by: default avatarNamhyung Kim <namhyung@kernel.org>
Tested-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20230811025822.3859771-2-namhyung@kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent dc7f01f1

tools/perf/tests/shell/record_bpf_filter.sh

0 → 100755
+128 −0
Original line number Diff line number Diff line 
#!/bin/sh

# perf record sample filtering (by BPF) tests

# SPDX-License-Identifier: GPL-2.0



set -e



err=0

perfdata=$(mktemp /tmp/__perf_test.perf.data.XXXXX)



cleanup() {

  rm -f "${perfdata}"

  rm -f "${perfdata}".old

  trap - EXIT TERM INT

}



trap_cleanup() {

  cleanup

  exit 1

}

trap trap_cleanup EXIT TERM INT



test_bpf_filter_priv() {

  echo "Checking BPF-filter privilege"



  if [ "$(id -u)" != 0 ]

  then

    echo "bpf-filter test [Skipped permission]"

    err=2

    return

  fi

  if ! perf record -e task-clock --filter 'period > 1' \

	  -o /dev/null --quiet true 2>&1

  then

    echo "bpf-filter test [Skipped missing BPF support]"

    err=2

    return

  fi

}



test_bpf_filter_basic() {

  echo "Basic bpf-filter test"



  if ! perf record -e task-clock -c 10000 --filter 'ip < 0xffffffff00000000' \

	  -o "${perfdata}" true 2> /dev/null

  then

    echo "Basic bpf-filter test [Failed record]"

    err=1

    return

  fi

  if perf script -i "${perfdata}" -F ip | grep 'ffffffff[0-9a-f]*'

  then

    echo "Basic bpf-filter test [Failed invalid output]"

    err=1

    return

  fi

  echo "Basic bpf-filter test [Success]"

}



test_bpf_filter_fail() {

  echo "Failing bpf-filter test"



  # 'cpu' requires PERF_SAMPLE_CPU flag

  if ! perf record -e task-clock --filter 'cpu > 0' \

	  -o /dev/null true 2>&1 | grep PERF_SAMPLE_CPU

  then

    echo "Failing bpf-filter test [Failed forbidden CPU]"

    err=1

    return

  fi



  if ! perf record --sample-cpu -e task-clock --filter 'cpu > 0' \

	  -o /dev/null true 2>/dev/null

  then

    echo "Failing bpf-filter test [Failed should succeed]"

    err=1

    return

  fi



  echo "Failing bpf-filter test [Success]"

}



test_bpf_filter_group() {

  echo "Group bpf-filter test"



  if ! perf record -e task-clock --filter 'period > 1000 || ip > 0' \

	  -o /dev/null true 2>/dev/null

  then

    echo "Group bpf-filter test [Failed should succeed]"

    err=1

    return

  fi



  if ! perf record -e task-clock --filter 'cpu > 0 || ip > 0' \

	  -o /dev/null true 2>&1 | grep PERF_SAMPLE_CPU

  then

    echo "Group bpf-filter test [Failed forbidden CPU]"

    err=1

    return

  fi



  if ! perf record -e task-clock --filter 'period > 0 || code_pgsz > 4096' \

	  -o /dev/null true 2>&1 | grep PERF_SAMPLE_CODE_PAGE_SIZE

  then

    echo "Group bpf-filter test [Failed forbidden CODE_PAGE_SIZE]"

    err=1

    return

  fi



  echo "Group bpf-filter test [Success]"

}





test_bpf_filter_priv



if [ $err = 0 ]; then

  test_bpf_filter_basic

fi



if [ $err = 0 ]; then

  test_bpf_filter_fail

fi



if [ $err = 0 ]; then

  test_bpf_filter_group

fi



cleanup

exit $err