Files
linux/tools/perf/tests/shell/perf_sched_stats.sh
Namhyung Kim dc647eb009 perf test: Skip sched stats test for !root
Running perf sched stats requires root and it fails to open the
schedstat file for regular users.  Let's skip the test.

  $ perf sched stats true
  Failed to open /proc/sys/kernel/sched_schedstats

Reviewed-by: Ian Rogers <irogers@google.com>
Tested-by: Swapnil Sapkal <swapnil.sapkal@amd.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2026-04-05 23:27:51 -07:00

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#!/bin/sh
# perf sched stats tests
# SPDX-License-Identifier: GPL-2.0
set -e
if [ "$(id -u)" != 0 ]; then
echo "[Skip] No root permission"
exit 2
fi
perfdata=$(mktemp /tmp/__perf_test_sched_stats.perf.data.XXXXX)
perfdata2=$(mktemp /tmp/__perf_test_sched_stats.perf.data.XXXXX)
cleanup() {
rm -f "${perfdata}"
rm -f "${perfdata}".old
rm -f "${perfdata2}"
rm -f "${perfdata2}".old
trap - EXIT TERM INT
}
trap_cleanup() {
echo "Unexpected signal in ${FUNCNAME[1]}"
cleanup
exit 1
}
trap trap_cleanup EXIT TERM INT
err=0
test_perf_sched_stats_record() {
echo "Basic perf sched stats record test"
if ! perf sched stats record -o "${perfdata}" true 2>&1 | \
grep -E -q "[ perf sched stats: Wrote samples to perf.data ]"
then
echo "Basic perf sched stats record test [Failed]"
err=1
return
fi
echo "Basic perf sched stats record test [Success]"
}
test_perf_sched_stats_report() {
echo "Basic perf sched stats report test"
perf sched stats record -o "${perfdata}" true > /dev/null
if ! perf sched stats report -i "${perfdata}" 2>&1 | grep -E -q "Description"
then
echo "Basic perf sched stats report test [Failed]"
err=1
return
fi
echo "Basic perf sched stats report test [Success]"
}
test_perf_sched_stats_live() {
echo "Basic perf sched stats live mode test"
if ! perf sched stats true 2>&1 | grep -E -q "Description"
then
echo "Basic perf sched stats live mode test [Failed]"
err=1
return
fi
echo "Basic perf sched stats live mode test [Success]"
}
test_perf_sched_stats_diff() {
echo "Basic perf sched stats diff test"
perf sched stats record -o "${perfdata}" true > /dev/null
perf sched stats record -o "${perfdata2}" true > /dev/null
if ! perf sched stats diff "${perfdata}" "${perfdata2}" > /dev/null
then
echo "Basic perf sched stats diff test [Failed]"
err=1
return
fi
echo "Basic perf sched stats diff test [Success]"
}
test_perf_sched_stats_record
test_perf_sched_stats_report
test_perf_sched_stats_live
test_perf_sched_stats_diff
cleanup
exit $err