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perf test: Add a basic offcpu profiling test
$ sudo ./perf test -v offcpu 88: perf record offcpu profiling tests : --- start --- test child forked, pid 685966 Basic off-cpu test Basic off-cpu test [Success] test child finished with 0 ---- end ---- perf record offcpu profiling tests: Ok Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Acked-by: Ian Rogers <irogers@google.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Blake Jones <blakejones@google.com> Cc: Hao Luo <haoluo@google.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Song Liu <songliubraving@fb.com> Cc: bpf@vger.kernel.org Link: https://lore.kernel.org/r/20220518224725.742882-7-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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tools/perf/tests/shell/record_offcpu.sh
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60
tools/perf/tests/shell/record_offcpu.sh
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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() {
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echo "Basic off-cpu test"
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if [ `id -u` != 0 ]
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then
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echo "Basic 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 ${perfdata} --quiet true 2>&1 | grep BUILD_BPF_SKEL
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then
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echo "Basic 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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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 record]"
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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 | egrep -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
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cleanup
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exit $err
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