linux-kernel - Re: [PATCH] perf test: Fix test case perf script tests on s390

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Date: Fri, 19 Jan 2024 13:49:44 -0800
From: Namhyung Kim <namhyung@...il.com>
To: Thomas Richter <tmricht@...ux.ibm.com>
Cc: linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org, 
	acme@...nel.org, irogers@...gle.com, acme@...hat.com, svens@...ux.ibm.com, 
	gor@...ux.ibm.com, sumanthk@...ux.ibm.com, hca@...ux.ibm.com
Subject: Re: [PATCH] perf test: Fix test case perf script tests on s390

Hello,

On Mon, Jan 15, 2024 at 6:50 AM Thomas Richter <tmricht@...ux.ibm.com> wrote:
>
> In linux next repo, test case 'perf script tests' fails on s390.
> The root case is a command line invocation of perf record with
> call-graph information. On s390 only dwarf formatted call-graphs
> are supported and only on software events.
>
> Change the command line parameters fors s390.
>
> Output before:
>  # perf test 89
>  89: perf script tests              : FAILED!
>  #
>
> Output after:
>  # perf test 89
>  89: perf script tests              : Ok
>  #
>
> Fixes: 0dd5041c9a0e ("perf addr_location: Add init/exit/copy functions")
> Signed-off-by: Thomas Richter <tmricht@...ux.ibm.com>
> Cc: Ian Rogers <irogers@...gle.com>
> ---
>  tools/perf/tests/shell/script.sh | 9 ++++++++-
>  1 file changed, 8 insertions(+), 1 deletion(-)
>
> diff --git a/tools/perf/tests/shell/script.sh b/tools/perf/tests/shell/script.sh
> index 5ae7bd0031a8..a6a09ef16e06 100755
> --- a/tools/perf/tests/shell/script.sh
> +++ b/tools/perf/tests/shell/script.sh
> @@ -54,7 +54,14 @@ def sample_table(*args):
>  def call_path_table(*args):
>      print(f'call_path_table({args}')
>  _end_of_file_
> -       perf record -g -o "${perfdatafile}" true
> +       case $(uname -m)
> +       in s390x)
> +               cmd_flags="--call-graph dwarf -e cpu-clock"
> +       ;; *)
> +               cmd_flags="-g"
> +       esac

I think this is unusual.  Maybe something like this?

    case $(uname -m) in
    s390x)
        cmd_flags="...";;
    *)
        cmd_flags="...";;
    esac

Thanks,
Namhyung


> +
> +       perf record $cmd_flags -o "${perfdatafile}" true
>         perf script -i "${perfdatafile}" -s "${db_test}"
>         echo "DB test [Success]"
>  }
> --
> 2.43.0
>
>