104 lines
2.1 KiB
Bash
104 lines
2.1 KiB
Bash
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#!/bin/sh
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# perf record offcpu profiling tests
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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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cleanup() {
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rm -f ${perfdata}
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rm -f ${perfdata}.old
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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 1
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}
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trap trap_cleanup exit term int
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test_offcpu_priv() {
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echo "Checking off-cpu privilege"
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if [ `id -u` != 0 ]
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then
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echo "off-cpu test [Skipped permission]"
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err=2
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return
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fi
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if perf record --off-cpu -o /dev/null --quiet true 2>&1 | grep BUILD_BPF_SKEL
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then
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echo "off-cpu test [Skipped missing BPF support]"
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err=2
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return
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fi
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}
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test_offcpu_basic() {
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echo "Basic off-cpu test"
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if ! perf record --off-cpu -e dummy -o ${perfdata} sleep 1 2> /dev/null
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then
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echo "Basic off-cpu test [Failed record]"
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err=1
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return
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fi
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if ! perf evlist -i ${perfdata} | grep -q "offcpu-time"
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then
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echo "Basic off-cpu test [Failed no event]"
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err=1
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return
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fi
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if ! perf report -i ${perfdata} -q --percent-limit=90 | grep -E -q sleep
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then
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echo "Basic off-cpu test [Failed missing output]"
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err=1
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return
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fi
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echo "Basic off-cpu test [Success]"
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}
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test_offcpu_child() {
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echo "Child task off-cpu test"
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# perf bench sched messaging creates 400 processes
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if ! perf record --off-cpu -e dummy -o ${perfdata} -- \
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perf bench sched messaging -g 10 > /dev/null 2>&1
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then
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echo "Child task off-cpu test [Failed record]"
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err=1
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return
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fi
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if ! perf evlist -i ${perfdata} | grep -q "offcpu-time"
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then
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echo "Child task off-cpu test [Failed no event]"
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err=1
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return
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fi
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# each process waits for read and write, so it should be more than 800 events
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if ! perf report -i ${perfdata} -s comm -q -n -t ';' --percent-limit=90 | \
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awk -F ";" '{ if (NF > 3 && int($3) < 800) exit 1; }'
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then
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echo "Child task off-cpu test [Failed invalid output]"
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err=1
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return
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fi
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echo "Child task off-cpu test [Success]"
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}
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test_offcpu_priv
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if [ $err = 0 ]; then
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test_offcpu_basic
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fi
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if [ $err = 0 ]; then
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test_offcpu_child
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fi
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cleanup
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exit $err
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