Commit 69757962 authored by Kan Liang's avatar Kan Liang Committed by Arnaldo Carvalho de Melo
Browse files

perf test: Basic branch counter support 



Add a basic test for the branch counter feature.

The test verifies that
- The new filter can be successfully applied on the supported platforms.
- The counter value can be outputted via the perf report -D

Signed-off-by: default avatarKan Liang <kan.liang@linux.intel.com>
Tested-by: default avatarIan Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tinghao Zhang <tinghao.zhang@intel.com>
Link: https://lore.kernel.org/r/20231107184020.1497571-1-kan.liang@linux.intel.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent cd38d6b5

tools/perf/tests/shell/record.sh

+30 −0
Original line number Diff line number Diff line
@@ -12,6 +12,9 @@ err=0 
perfdata=$(mktemp /tmp/__perf_test.perf.data.XXXXX)

testprog="perf test -w thloop"

testsym="test_loop"

cpu_pmu_dir="/sys/bus/event_source/devices/cpu*"

br_cntr_file="/caps/branch_counter_nr"

br_cntr_output="branch stack counters"



cleanup() {

  rm -rf "${perfdata}"
@@ -155,10 +158,37 @@ test_workload() { 
  echo "Basic target workload test [Success]"

}



test_branch_counter() {

  echo "Basic branch counter test"

  # Check if the branch counter feature is supported

  for dir in $cpu_pmu_dir

  do

    if [ ! -e "$dir$br_cntr_file" ]

    then

      echo "branch counter feature not supported on all core PMUs ($dir) [Skipped]"

      return

    fi

  done

  if ! perf record -o "${perfdata}" -j any,counter ${testprog} 2> /dev/null

  then

    echo "Basic branch counter test [Failed record]"

    err=1

    return

  fi

  if ! perf report -i "${perfdata}" -D -q | grep -q "$br_cntr_output"

  then

    echo "Basic branch record test [Failed missing output]"

    err=1

    return

  fi

  echo "Basic branch counter test [Success]"

}



test_per_thread

test_register_capture

test_system_wide

test_workload

test_branch_counter



cleanup

exit $err