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perf test: Add perf record sample filtering test
$ sudo ./perf test 'sample filter' -v 94: perf record sample filtering (by BPF) tests : --- start --- test child forked, pid 3817527 Checking BPF-filter privilege Basic bpf-filter test Basic bpf-filter test [Success] Failing bpf-filter test Error: task-clock event does not have PERF_SAMPLE_CPU Failing bpf-filter test [Success] Group bpf-filter test Error: task-clock event does not have PERF_SAMPLE_CPU Error: task-clock event does not have PERF_SAMPLE_CODE_PAGE_SIZE Group bpf-filter test [Success] test child finished with 0 ---- end ---- perf record sample filtering (by BPF) tests: Ok Reviewed-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/r/20230811025822.3859771-2-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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tools/perf/tests/shell/record_bpf_filter.sh
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tools/perf/tests/shell/record_bpf_filter.sh
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#!/bin/sh
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# perf record sample filtering (by BPF) 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 "${perfdata}".old
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trap - EXIT TERM INT
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}
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trap_cleanup() {
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cleanup
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exit 1
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}
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trap trap_cleanup EXIT TERM INT
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test_bpf_filter_priv() {
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echo "Checking BPF-filter privilege"
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if [ "$(id -u)" != 0 ]
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then
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echo "bpf-filter 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 -e task-clock --filter 'period > 1' \
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-o /dev/null --quiet true 2>&1
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then
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echo "bpf-filter 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_bpf_filter_basic() {
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echo "Basic bpf-filter test"
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if ! perf record -e task-clock -c 10000 --filter 'ip < 0xffffffff00000000' \
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-o "${perfdata}" true 2> /dev/null
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then
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echo "Basic bpf-filter test [Failed record]"
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err=1
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return
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fi
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if perf script -i "${perfdata}" -F ip | grep 'ffffffff[0-9a-f]*'
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then
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echo "Basic bpf-filter 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 "Basic bpf-filter test [Success]"
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}
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test_bpf_filter_fail() {
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echo "Failing bpf-filter test"
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# 'cpu' requires PERF_SAMPLE_CPU flag
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if ! perf record -e task-clock --filter 'cpu > 0' \
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-o /dev/null true 2>&1 | grep PERF_SAMPLE_CPU
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then
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echo "Failing bpf-filter test [Failed forbidden CPU]"
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err=1
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return
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fi
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if ! perf record --sample-cpu -e task-clock --filter 'cpu > 0' \
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-o /dev/null true 2>/dev/null
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then
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echo "Failing bpf-filter test [Failed should succeed]"
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err=1
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return
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fi
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echo "Failing bpf-filter test [Success]"
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}
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test_bpf_filter_group() {
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echo "Group bpf-filter test"
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if ! perf record -e task-clock --filter 'period > 1000 || ip > 0' \
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-o /dev/null true 2>/dev/null
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then
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echo "Group bpf-filter test [Failed should succeed]"
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err=1
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return
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fi
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if ! perf record -e task-clock --filter 'cpu > 0 || ip > 0' \
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-o /dev/null true 2>&1 | grep PERF_SAMPLE_CPU
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then
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echo "Group bpf-filter test [Failed forbidden CPU]"
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err=1
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return
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fi
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if ! perf record -e task-clock --filter 'period > 0 || code_pgsz > 4096' \
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-o /dev/null true 2>&1 | grep PERF_SAMPLE_CODE_PAGE_SIZE
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then
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echo "Group bpf-filter test [Failed forbidden CODE_PAGE_SIZE]"
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err=1
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return
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fi
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echo "Group bpf-filter test [Success]"
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}
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test_bpf_filter_priv
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if [ $err = 0 ]; then
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test_bpf_filter_basic
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fi
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if [ $err = 0 ]; then
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test_bpf_filter_fail
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fi
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if [ $err = 0 ]; then
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test_bpf_filter_group
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fi
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cleanup
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exit $err
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