linux-kernel - Re: [PATCH] perf tests: Fix test_arm_callgraph

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Date:   Thu, 22 Jun 2023 22:00:21 -0700
From:   Namhyung Kim <namhyung@...nel.org>
To:     James Clark <james.clark@....com>
Cc:     linux-perf-users@...r.kernel.org, spoorts2@...ibm.com,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>, Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Athira Rajeev <atrajeev@...ux.vnet.ibm.com>,
        Kajol Jain <kjain@...ux.ibm.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf tests: Fix test_arm_callgraph_fp variable expansion

Hi James,

On Thu, Jun 22, 2023 at 3:18 AM James Clark <james.clark@....com> wrote:
>
> $TEST_PROGRAM is a command with spaces so it's supposed to be word
> split. The referenced fix to fix the shellcheck warnings incorrectly
> quoted this string so unquote it to fix the test.
>
> At the same time silence the shellcheck warning for that line and fix
> two more shellcheck errors at the end of the script.
>
> Fixes: 1bb17b4c6c91 ("perf tests arm_callgraph_fp: Address shellcheck warnings about signal names and adding double quotes for expression")
> Signed-off-by: James Clark <james.clark@....com>

Acked-by: Namhyung Kim <namhyung@...nel.org>

Thanks,
Namhyung

> ---
>  tools/perf/tests/shell/test_arm_callgraph_fp.sh | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/tools/perf/tests/shell/test_arm_callgraph_fp.sh b/tools/perf/tests/shell/test_arm_callgraph_fp.sh
> index 1380e0d12dce..66dfdfdad553 100755
> --- a/tools/perf/tests/shell/test_arm_callgraph_fp.sh
> +++ b/tools/perf/tests/shell/test_arm_callgraph_fp.sh
> @@ -15,7 +15,8 @@ cleanup_files()
>  trap cleanup_files EXIT TERM INT
>
>  # Add a 1 second delay to skip samples that are not in the leaf() function
> -perf record -o "$PERF_DATA" --call-graph fp -e cycles//u -D 1000 --user-callchains -- "$TEST_PROGRAM" 2> /dev/null &
> +# shellcheck disable=SC2086
> +perf record -o "$PERF_DATA" --call-graph fp -e cycles//u -D 1000 --user-callchains -- $TEST_PROGRAM 2> /dev/null &
>  PID=$!
>
>  echo " + Recording (PID=$PID)..."
> @@ -33,8 +34,8 @@ wait $PID
>  #      76c leafloop
>  # ...
>
> -perf script -i $PERF_DATA -F comm,ip,sym | head -n4
> -perf script -i $PERF_DATA -F comm,ip,sym | head -n4 | \
> +perf script -i "$PERF_DATA" -F comm,ip,sym | head -n4
> +perf script -i "$PERF_DATA" -F comm,ip,sym | head -n4 | \
>         awk '{ if ($2 != "") sym[i++] = $2 } END { if (sym[0] != "leaf" ||
>                                                        sym[1] != "parent" ||
>                                                        sym[2] != "leafloop") exit 1 }'
> --
> 2.34.1
>