ade1d0307b
Record off-cpu data with perf bench sched messaging workload and count the number of offcpu-time events. Also update the test script not to run next tests if failed already and revise the error messages. $ sudo ./perf test offcpu -v 88: perf record offcpu profiling tests : --- start --- test child forked, pid 344780 Checking off-cpu privilege Basic off-cpu test Basic off-cpu test [Success] Child task off-cpu test Child task off-cpu test [Success] test child finished with 0 ---- end ---- perf record offcpu profiling tests: Ok Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Blake Jones <blakejones@google.com> Cc: Hao Luo <haoluo@google.com> Cc: Ian Rogers <irogers@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/20220811185456.194721-5-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
103 lines
2.1 KiB
Bash
Executable file
103 lines
2.1 KiB
Bash
Executable file
#!/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 | 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_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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