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SubjectRe: [PATCH v1] perf test: Avoid hard coded metrics in stat std output test
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On 2024-04-17 2:32 p.m., Ian Rogers wrote:
> Hard coded metric names fail on ARM testing.
>
> Signed-off-by: Ian Rogers <irogers@google.com>
> ---
> tools/perf/tests/shell/stat+std_output.sh | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/perf/tests/shell/stat+std_output.sh b/tools/perf/tests/shell/stat+std_output.sh
> index cbf2894b2c84..845f83213855 100755
> --- a/tools/perf/tests/shell/stat+std_output.sh
> +++ b/tools/perf/tests/shell/stat+std_output.sh
> @@ -13,7 +13,7 @@ stat_output=$(mktemp /tmp/__perf_test.stat_output.std.XXXXX)
>
> event_name=(cpu-clock task-clock context-switches cpu-migrations page-faults stalled-cycles-frontend stalled-cycles-backend cycles instructions branches branch-misses)
> event_metric=("CPUs utilized" "CPUs utilized" "/sec" "/sec" "/sec" "frontend cycles idle" "backend cycles idle" "GHz" "insn per cycle" "/sec" "of all branches")
> -skip_metric=("stalled cycles per insn" "tma_" "retiring" "frontend_bound" "bad_speculation" "backend_bound")
> +skip_metric=($(perf list --raw Default 2> /dev/null))


The "perf list --raw Default" only gives the topdown metrics.
The "stalled cycles per insn" is not covered.
The check should skip the line of "stalled cycles per insn" as well.

3,856,436,920 stalled-cycles-frontend # 74.09% frontend cycles idle
1,600,790,871 stalled-cycles-backend # 30.75% backend cycles idle
2,603,501,247 instructions # 0.50 insns per cycle
# 1.48 stalled cycles
per insn
484,357,498 branches # 283.455 M/sec
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/tools/perf/builtin-stat.c#n24

The newer Intel CPU doesn't have the stalled-cycles-* events. But it
seems power and older x86 CPU have the events.

Thanks,
Kan

>
> cleanup() {
> rm -f "${stat_output}"

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