linux-kernel - Re: [PATCH v2 1/1] Add field checking tests for perf stat JSON output.

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Date:   Tue, 31 Aug 2021 21:46:10 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Claire Jensen <cjense@...gle.com>
Cc:     peterz@...radead.org, mingo@...hat.com, acme@...nel.org,
        mark.rutland@....com, alexander.shishkin@...ux.intel.com,
        namhyung@...nel.org, yao.jin@...ux.intel.com, song@...nel.org,
        andi@...stfloor.org, adrian.hunter@...el.com,
        kan.liang@...ux.intel.com, james.clark@....com,
        alexander.antonov@...ux.intel.com, changbin.du@...el.com,
        liuqi115@...wei.com, irogers@...gle.com, eranian@...gle.com,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        clairej735@...il.com
Subject: Re: [PATCH v2 1/1] Add field checking tests for perf stat JSON
 output.

On Fri, Aug 13, 2021 at 10:09:37PM +0000, Claire Jensen wrote:
> Counts number of fields to make sure expected fields are present.
> 
> Signed-off-by: Claire Jensen <cjense@...gle.com>
> ---
>  .../tests/shell/lib/perf_json_output_lint.py  |  48 ++++++++
>  tools/perf/tests/shell/stat+json_output.sh    | 114 ++++++++++++++++++
>  2 files changed, 162 insertions(+)
>  create mode 100644 tools/perf/tests/shell/lib/perf_json_output_lint.py
>  create mode 100644 tools/perf/tests/shell/stat+json_output.sh

this one needs to have exec priv, right?

> 
> diff --git a/tools/perf/tests/shell/lib/perf_json_output_lint.py b/tools/perf/tests/shell/lib/perf_json_output_lint.py
> new file mode 100644
> index 000000000000..45d9163e7423
> --- /dev/null

SNIP

> diff --git a/tools/perf/tests/shell/stat+json_output.sh b/tools/perf/tests/shell/stat+json_output.sh
> new file mode 100644
> index 000000000000..8a772badae45
> --- /dev/null
> +++ b/tools/perf/tests/shell/stat+json_output.sh
> @@ -0,0 +1,114 @@
> +#!/bin/bash
> +# perf stat JSON output linter
> +# SPDX-License-Identifier: GPL-2.0
> +# Checks various perf stat JSON output commands for the
> +# correct number of fields.
> +
> +set -e
> +set -x
> +
> +pythonchecker=$(dirname $0)/lib/perf_json_output_lint.py
> +file="/proc/sys/kernel/perf_event_paranoid"
> +paranoia=$(cat "$file" | grep -o -E '[0-9]+')
> +
> +check_no_args()
> +{
> +	perf stat -j sleep 1 2>&1 | \

hum, is this based on some other change? I don't see -j option in perf stat

jirka

> +	python $pythonchecker --no-args
> +}
> +
> +if [ $paranoia -gt 0 ];
> +then
> +	echo check_all_cpus test skipped because of paranoia level.
> +else
> +	check_all_cpus()
> +	{
> +		perf stat -j -a 2>&1 sleep 1 | \
> +		python $pythonchecker --all-cpus
> +	}

SNIP