Commit 90d97674 authored by Thomas Richter's avatar Thomas Richter Committed by Namhyung Kim
Browse files

perf test: Use cycles event in perf record test for leader_sampling 



On s390 the event instructions can not be used for recording.
This event is only supported by perf stat.

Change the event from instructions to cycles in subtest
test_leader_sampling.

Signed-off-by: default avatarThomas Richter <tmricht@linux.ibm.com>
Suggested-by: default avatarJames Clark <james.clark@linaro.org>
Reviewed-by: default avatarJames Clark <james.clark@linaro.org>
Reviewed-by: default avatarKan Liang <kan.liang@linux.intel.com>
Link: https://lore.kernel.org/r/20250131102756.4185235-3-tmricht@linux.ibm.com


Signed-off-by: default avatarNamhyung Kim <namhyung@kernel.org>
parent 85919943

tools/perf/tests/shell/record.sh

+5 −5
Original line number Diff line number Diff line
@@ -231,7 +231,7 @@ test_cgroup() { 


test_leader_sampling() {

  echo "Basic leader sampling test"

  if ! perf record -o "${perfdata}" -e "{instructions,instructions}:Su" -- \

  if ! perf record -o "${perfdata}" -e "{cycles,cycles}:Su" -- \

    perf test -w brstack 2> /dev/null

  then

    echo "Leader sampling [Failed record]"
@@ -243,15 +243,15 @@ test_leader_sampling() { 
  while IFS= read -r line

  do

    # Check if the two instruction counts are equal in each record

    instructions=$(echo $line | awk '{for(i=1;i<=NF;i++) if($i=="instructions:") print $(i-1)}')

    if [ $(($index%2)) -ne 0 ] && [ ${instructions}x != ${prev_instructions}x ]

    cycles=$(echo $line | awk '{for(i=1;i<=NF;i++) if($i=="cycles:") print $(i-1)}')

    if [ $(($index%2)) -ne 0 ] && [ ${cycles}x != ${prev_cycles}x ]

    then

      echo "Leader sampling [Failed inconsistent instructions count]"

      echo "Leader sampling [Failed inconsistent cycles count]"

      err=1

      return

    fi

    index=$(($index+1))

    prev_instructions=$instructions

    prev_cycles=$cycles

  done < $script_output

  echo "Basic leader sampling test [Success]"

}