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070b315333
The test would fail if target machine does not have 'uncore_imc' devices. Since event uniquifying behavior is similar among different architectures, we are restricting the test to only run on machines with `uncore_imc` devices. Suggested-by: Ian Rogers <irogers@google.com> Signed-off-by: Chun-Tse Shao <ctshao@google.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/r/20250521224513.1104129-1-ctshao@google.com [ Skip the test, i.e. return 2, instead of returning 0 as if the test had succeed ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
77 lines
2.4 KiB
Bash
Executable file
77 lines
2.4 KiB
Bash
Executable file
#!/bin/bash
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# perf stat events uniquifying
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# SPDX-License-Identifier: GPL-2.0
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set -e
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stat_output=$(mktemp /tmp/__perf_test.stat_output.XXXXX)
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perf_tool=perf
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err=0
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test_event_uniquifying() {
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# We use `clockticks` in `uncore_imc` to verify the uniquify behavior.
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pmu="uncore_imc"
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event="clockticks"
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# If the `-A` option is added, the event should be uniquified.
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#
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# $perf list -v clockticks
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#
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# List of pre-defined events (to be used in -e or -M):
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#
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# uncore_imc_0/clockticks/ [Kernel PMU event]
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# uncore_imc_1/clockticks/ [Kernel PMU event]
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# uncore_imc_2/clockticks/ [Kernel PMU event]
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# uncore_imc_3/clockticks/ [Kernel PMU event]
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# uncore_imc_4/clockticks/ [Kernel PMU event]
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# uncore_imc_5/clockticks/ [Kernel PMU event]
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#
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# ...
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#
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# $perf stat -e clockticks -A -- true
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#
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# Performance counter stats for 'system wide':
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#
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# CPU0 3,773,018 uncore_imc_0/clockticks/
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# CPU0 3,609,025 uncore_imc_1/clockticks/
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# CPU0 0 uncore_imc_2/clockticks/
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# CPU0 3,230,009 uncore_imc_3/clockticks/
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# CPU0 3,049,897 uncore_imc_4/clockticks/
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# CPU0 0 uncore_imc_5/clockticks/
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#
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# 0.002029828 seconds time elapsed
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echo "stat event uniquifying test"
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uniquified_event_array=()
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# Skip if the machine does not have `uncore_imc` device.
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if ! ${perf_tool} list pmu | grep -q ${pmu}; then
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echo "Target does not support PMU ${pmu} [Skipped]"
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err=2
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return
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fi
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# Check how many uniquified events.
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while IFS= read -r line; do
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uniquified_event=$(echo "$line" | awk '{print $1}')
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uniquified_event_array+=("${uniquified_event}")
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done < <(${perf_tool} list -v ${event} | grep ${pmu})
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perf_command="${perf_tool} stat -e $event -A -o ${stat_output} -- true"
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$perf_command
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# Check the output contains all uniquified events.
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for uniquified_event in "${uniquified_event_array[@]}"; do
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if ! cat "${stat_output}" | grep -q "${uniquified_event}"; then
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echo "Event is not uniquified [Failed]"
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echo "${perf_command}"
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cat "${stat_output}"
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err=1
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break
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fi
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done
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}
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test_event_uniquifying
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rm -f "${stat_output}"
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exit $err
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