74 lines
1.4 KiB
Bash
74 lines
1.4 KiB
Bash
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#!/bin/sh
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# kernel lock contention analysis test
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# SPDX-License-Identifier: GPL-2.0
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set -e
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err=0
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perfdata=$(mktemp /tmp/__perf_test.perf.data.XXXXX)
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result=$(mktemp /tmp/__perf_test.result.XXXXX)
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cleanup() {
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rm -f ${perfdata}
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rm -f ${result}
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trap - exit term int
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}
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trap_cleanup() {
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cleanup
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exit ${err}
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}
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trap trap_cleanup exit term int
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check() {
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if [ `id -u` != 0 ]; then
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echo "[Skip] No root permission"
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err=2
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exit
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fi
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if ! perf list | grep -q lock:contention_begin; then
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echo "[Skip] No lock contention tracepoints"
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err=2
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exit
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fi
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}
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test_record()
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{
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echo "Testing perf lock record and perf lock contention"
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perf lock record -o ${perfdata} -- perf bench sched messaging > /dev/null 2>&1
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# the output goes to the stderr and we expect only 1 output (-E 1)
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perf lock contention -i ${perfdata} -E 1 -q 2> ${result}
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if [ $(cat "${result}" | wc -l) != "1" ]; then
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echo "[Fail] Recorded result count is not 1:" $(cat "${result}" | wc -l)
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err=1
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exit
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fi
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}
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test_bpf()
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{
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echo "Testing perf lock contention --use-bpf"
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if ! perf lock con -b true > /dev/null 2>&1 ; then
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echo "[Skip] No BPF support"
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exit
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fi
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# the perf lock contention output goes to the stderr
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perf lock con -a -b -E 1 -q -- perf bench sched messaging > /dev/null 2> ${result}
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if [ $(cat "${result}" | wc -l) != "1" ]; then
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echo "[Fail] BPF result count is not 1:" $(cat "${result}" | wc -l)
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err=1
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exit
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fi
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}
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check
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test_record
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test_bpf
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exit ${err}
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