Re: [PATCH v1] perf tests task-analyzer: Write all test files to tmpdir

[Namhyung Kim <namhyung@kernel.org>]

On Fri, Mar 20, 2026 at 11:16:24PM -0700, Ian Rogers wrote:
> Writing to the test output files in the current working directory can
> fail in various contexts such as continual test. Other tests write to
> a mktemp-ed file, make the "perf script task-analyszer tests" follow
> this convention too. Currently this isn't possible for the perf.data
> file due to a lack of perf script support.

I don't know what you mean by the last sentence.

> 
> Signed-off-by: Ian Rogers <irogers@google.com>
> ---
>  tools/perf/tests/shell/test_task_analyzer.sh | 37 +++++++++++---------
>  1 file changed, 20 insertions(+), 17 deletions(-)
> 
> diff --git a/tools/perf/tests/shell/test_task_analyzer.sh b/tools/perf/tests/shell/test_task_analyzer.sh
> index e194fcf61df3..cc74b03477fe 100755
> --- a/tools/perf/tests/shell/test_task_analyzer.sh
> +++ b/tools/perf/tests/shell/test_task_analyzer.sh
> @@ -3,6 +3,10 @@
>  # SPDX-License-Identifier: GPL-2.0
>  
>  tmpdir=$(mktemp -d /tmp/perf-script-task-analyzer-XXXXX)
> +# perf script report only supports input from the perf.data file.
> +perfdata="perf.data"

I thought you want to use a different file name.  What's the point of
adding a variable here?


> +csv="$tmpdir/csv"
> +csvsummary="$tmpdir/csvsummary"
>  err=0
>  
>  # set PERF_EXEC_PATH to find scripts in the source directory
> @@ -15,11 +19,10 @@ fi
>  export ASAN_OPTIONS=detect_leaks=0
>  
>  cleanup() {
> -  rm -f perf.data
> -  rm -f perf.data.old
> -  rm -f csv
> -  rm -f csvsummary
> +  rm -f "${perfdata}"
> +  rm -f "${perfdata}".old
>    rm -rf "$tmpdir"
> +
>    trap - exit term int
>  }
>  
> @@ -61,7 +64,7 @@ skip_no_probe_record_support() {
>  
>  prepare_perf_data() {
>  	# 1s should be sufficient to catch at least some switches
> -	perf record -e sched:sched_switch -a -- sleep 1 > /dev/null 2>&1
> +	perf record -e sched:sched_switch -a -o "${perfdata}" -- sleep 1 > /dev/null 2>&1

I'm not sure why it's needed.

Thanks,
Namhyung


>  	# check if perf data file got created in above step.
>  	if [ ! -e "perf.data" ]; then
>  		printf "FAIL: perf record failed to create \"perf.data\" \n"
> @@ -130,28 +133,28 @@ test_extended_times_summary_ns() {
>  }
>  
>  test_csv() {
> -	perf script report task-analyzer --csv csv > /dev/null
> -	check_exec_0 "perf script report task-analyzer --csv csv"
> -	find_str_or_fail "Comm;" csv "${FUNCNAME[0]}"
> +	perf script report task-analyzer --csv "${csv}" > /dev/null
> +	check_exec_0 "perf script report task-analyzer --csv ${csv}"
> +	find_str_or_fail "Comm;" "${csv}" "${FUNCNAME[0]}"
>  }
>  
>  test_csv_extended_times() {
> -	perf script report task-analyzer --csv csv --extended-times > /dev/null
> -	check_exec_0 "perf script report task-analyzer --csv csv --extended-times"
> -	find_str_or_fail "Out-Out;" csv "${FUNCNAME[0]}"
> +	perf script report task-analyzer --csv "${csv}" --extended-times > /dev/null
> +	check_exec_0 "perf script report task-analyzer --csv ${csv} --extended-times"
> +	find_str_or_fail "Out-Out;" "${csv}" "${FUNCNAME[0]}"
>  }
>  
>  test_csvsummary() {
> -	perf script report task-analyzer --csv-summary csvsummary > /dev/null
> -	check_exec_0 "perf script report task-analyzer --csv-summary csvsummary"
> -	find_str_or_fail "Comm;" csvsummary "${FUNCNAME[0]}"
> +	perf script report task-analyzer --csv-summary "${csvsummary}" > /dev/null
> +	check_exec_0 "perf script report task-analyzer --csv-summary ${csvsummary}"
> +	find_str_or_fail "Comm;" "${csvsummary}" "${FUNCNAME[0]}"
>  }
>  
>  test_csvsummary_extended() {
> -	perf script report task-analyzer --csv-summary csvsummary --summary-extended \
> +	perf script report task-analyzer --csv-summary "${csvsummary}" --summary-extended \
>  	>/dev/null
> -	check_exec_0 "perf script report task-analyzer --csv-summary csvsummary --summary-extended"
> -	find_str_or_fail "Out-Out;" csvsummary "${FUNCNAME[0]}"
> +	check_exec_0 "perf script report task-analyzer --csv-summary ${csvsummary} --summary-extended"
> +	find_str_or_fail "Out-Out;" "${csvsummary}" "${FUNCNAME[0]}"
>  }
>  
>  skip_no_probe_record_support
> -- 
> 2.53.0.959.g497ff81fa9-goog
>