Commit 0e22c5ca authored by Ian Rogers's avatar Ian Rogers Committed by Namhyung Kim
Browse files

perf test: Add sched latency and script shell tests 



Add shell tests covering the `perf sched latency` and `perf sched
script` commands. The test creates 2 noploop processes on the same
forced CPU, it then checks that the process appears in the `perf
sched` output.

Reviewed-by: default avatarJames Clark <james.clark@linaro.org>
Signed-off-by: default avatarIan Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20250628012302.1242532-2-irogers@google.com


Signed-off-by: default avatarNamhyung Kim <namhyung@kernel.org>
parent b6cea9b4

tools/perf/tests/shell/sched.sh

0 → 100755
+93 −0
Original line number Diff line number Diff line 
#!/bin/bash

# perf sched tests

# SPDX-License-Identifier: GPL-2.0



set -e



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

  echo "[Skip] No root permission"

  exit 2

fi



err=0

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

PID1=0

PID2=0



cleanup() {

  rm -f "${perfdata}"

  rm -f "${perfdata}".old



  trap - EXIT TERM INT

}



trap_cleanup() {

  echo "Unexpected signal in ${FUNCNAME[1]}"

  cleanup

  exit 1

}

trap trap_cleanup EXIT TERM INT



start_noploops() {

  # Start two noploop workloads on CPU0 to trigger scheduling.

  perf test -w noploop 10 &

  PID1=$!

  taskset -pc 0 $PID1

  perf test -w noploop 10 &

  PID2=$!

  taskset -pc 0 $PID2



  if ! grep -q 'Cpus_allowed_list:\s*0$' "/proc/$PID1/status"

  then

    echo "Sched [Error taskset did not work for the 1st noploop ($PID1)]"

    grep Cpus_allowed /proc/$PID1/status

    err=1

  fi



  if ! grep -q 'Cpus_allowed_list:\s*0$' "/proc/$PID2/status"

  then

    echo "Sched [Error taskset did not work for the 2nd noploop ($PID2)]"

    grep Cpus_allowed /proc/$PID2/status

    err=1

  fi

}



cleanup_noploops() {

  kill "$PID1" "$PID2"

}



test_sched_latency() {

  echo "Sched latency"



  start_noploops



  perf sched record --no-inherit -o "${perfdata}" sleep 1

  if ! perf sched latency -i "${perfdata}" | grep -q perf-noploop

  then

    echo "Sched latency [Failed missing output]"

    err=1

  fi



  cleanup_noploops

}



test_sched_script() {

  echo "Sched script"



  start_noploops



  perf sched record --no-inherit -o "${perfdata}" sleep 1

  if ! perf sched script -i "${perfdata}" | grep -q perf-noploop

  then

    echo "Sched script [Failed missing output]"

    err=1

  fi



  cleanup_noploops

}



test_sched_latency

test_sched_script



cleanup

exit $err