linux-kernel - Re: [Patch v2 5/5] perf tests: Add topdown events counting and sampling tests

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Message-ID: <c9e09449-f8ff-471f-adf3-1a5e8f97a102@linux.intel.com>
Date: Mon, 8 Jul 2024 09:40:28 -0400
From: "Liang, Kan" <kan.liang@...ux.intel.com>
To: Dapeng Mi <dapeng1.mi@...ux.intel.com>,
 Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
 Arnaldo Carvalho de Melo <acme@...nel.org>,
 Namhyung Kim <namhyung@...nel.org>, Ian Rogers <irogers@...gle.com>,
 Adrian Hunter <adrian.hunter@...el.com>,
 Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
 Yongwei Ma <yongwei.ma@...el.com>, Dapeng Mi <dapeng1.mi@...el.com>
Subject: Re: [Patch v2 5/5] perf tests: Add topdown events counting and
 sampling tests



On 2024-07-08 10:42 a.m., Dapeng Mi wrote:
> Add counting and leader sampling tests to verify topdown events including
> raw format can be reordered correctly.
> 
> Signed-off-by: Dapeng Mi <dapeng1.mi@...ux.intel.com>
> ---
>  tools/perf/tests/shell/record.sh | 6 ++++++
>  tools/perf/tests/shell/stat.sh   | 6 ++++++
>  2 files changed, 12 insertions(+)
> 
> diff --git a/tools/perf/tests/shell/record.sh b/tools/perf/tests/shell/record.sh
> index 8e3e66780fed..164f0cf9648e 100755
> --- a/tools/perf/tests/shell/record.sh
> +++ b/tools/perf/tests/shell/record.sh
> @@ -214,6 +214,12 @@ test_leader_sampling() {
>      index=$(($index+1))
>      prev_branches=$branches
>    done < $script_output

The topdown is a model specific feature and only be available for the
big core.

We need to check if topdown is supported before doing the test.

The same check in the test_topdown_groups() may be used here as well.

  if ! perf stat -e '{slots,topdown-retiring}' true > /dev/null 2>&1
  then
    echo "Topdown sampling read test [Skipped event parsing failed]"
    return
  fi

Thanks,
Kan

> +  if ! perf record -o "${perfdata}" -e "{instructions,slots,topdown-retiring}:S" true 2> /dev/null
> +  then
> +    echo "Leader sampling [Failed topdown events not reordered correctly]"
> +    err=1
> +    return
> +  fi
>    echo "Basic leader sampling test [Success]"
>  }
>  
> diff --git a/tools/perf/tests/shell/stat.sh b/tools/perf/tests/shell/stat.sh
> index 3f1e67795490..092a7a2abcf8 100755
> --- a/tools/perf/tests/shell/stat.sh
> +++ b/tools/perf/tests/shell/stat.sh
> @@ -79,6 +79,12 @@ test_topdown_groups() {
>      err=1
>      return
>    fi
> +  if perf stat -e '{instructions,r400,r8000}' true 2>&1 | grep -E -q "<not supported>"
> +  then
> +    echo "Topdown event group test [Failed raw format slots not reordered first]"
> +    err=1
> +    return
> +  fi
>    echo "Topdown event group test [Success]"
>  }
>