linux/tools/testing/selftests/ftrace/test.d/tracer/wakeup.tc

#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
# description: Test wakeup tracer
# requires: wakeup:tracer

if ! which chrt ; then
  echo "chrt is not found. This test requires nice command."
  exit_unresolved
fi

echo wakeup > current_tracer
echo 1 > tracing_on
echo 0 > tracing_max_latency

: "Wakeup higher priority task"
chrt -f 5 sleep 1

echo 0 > tracing_on
grep '+ \[[[:digit:]]*\]' trace
grep '==> \[[[:digit:]]*\]' trace