#!/bin/bash# perf trace summary (exclusive)# SPDX-License-Identifier: GPL-2.0 # Check that perf trace works with various summary mode # shellcheck source=lib/probe.sh. "$(dirname $0)"/lib/probe.sh skip_if_no_perf_trace || exit 2[ "$(id -u)" = 0 ] || exit 2 OUTPUT=$(mktemp /tmp/perf_trace_test.XXXXX) test_perf_trace() {    args=$1    workload="cat /dev/null"    search="^\s*(open|read|close).*[0-9]+%$"     echo "testing: perf trace ${args} -- ${workload}"    perf trace ${args} -- ${workload} >${OUTPUT} 2>&1    if [ $? -ne 0 ]; then        echo "Error: perf trace ${args} failed unexpectedly"        cat ${OUTPUT}        rm -f ${OUTPUT}        exit 1    fi     count=$(grep -E -c -m 3 "${search}" ${OUTPUT})    if [ "${count}" != "3" ]; then	echo "Error: cannot find enough pattern ${search} in the output"	cat ${OUTPUT}	rm -f ${OUTPUT}	exit 1    fi} # summary only for a processtest_perf_trace "-s" # normal output with summary at the endtest_perf_trace "-S" # summary only with an explicit summary modetest_perf_trace "-s --summary-mode=thread" # summary with normal output - total summary modetest_perf_trace "-S --summary-mode=total" # summary only for system wide - per-thread summarytest_perf_trace "-as --summary-mode=thread --no-bpf-summary" # summary only for system wide - total summary modetest_perf_trace "-as --summary-mode=total --no-bpf-summary" if ! perf check feature -q bpf; then    echo "Skip --bpf-summary tests as perf built without libbpf"    rm -f ${OUTPUT}    exit 2fi # summary only for system wide - per-thread summary with BPFtest_perf_trace "-as --summary-mode=thread --bpf-summary" # summary only for system wide - total summary mode with BPFtest_perf_trace "-as --summary-mode=total --bpf-summary" # summary with normal output for system wide - total summary mode with BPFtest_perf_trace "-aS --summary-mode=total --bpf-summary" # summary only for system wide - cgroup summary mode with BPFtest_perf_trace "-as --summary-mode=cgroup --bpf-summary" # summary with normal output for system wide - cgroup summary mode with BPFtest_perf_trace "-aS --summary-mode=cgroup --bpf-summary" rm -f ${OUTPUT}