linux-kernel - Re: [PATCH 08/12] perf test: Replace arm spe fork test workload with sqrtloop

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Message-ID: <f76388e6-df62-baf0-4f6b-84fc3822b233@arm.com>
Date:   Mon, 14 Nov 2022 11:12:26 +0000
From:   James Clark <james.clark@....com>
To:     Namhyung Kim <namhyung@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...nel.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        linux-perf-users@...r.kernel.org, Leo Yan <leo.yan@...aro.org>,
        German Gomez <german.gomez@....com>,
        Zhengjun Xing <zhengjun.xing@...ux.intel.com>,
        Athira Jajeev <atrajeev@...ux.vnet.ibm.com>
Subject: Re: [PATCH 08/12] perf test: Replace arm spe fork test workload with
 sqrtloop



On 10/11/2022 18:19, Namhyung Kim wrote:
> So that it can get rid of requirement of a compiler.  I've also removed
> killall as it'll kill perf process now and run the test workload for 10
> sec instead.
> 
> Tested-by: Leo Yan <leo.yan@...aro.org>
> Signed-off-by: Namhyung Kim <namhyung@...nel.org>
> ---
>  tools/perf/tests/shell/test_arm_spe_fork.sh | 44 +--------------------
>  1 file changed, 1 insertion(+), 43 deletions(-)

Tested-by: James Clark <james.clark@....com>

> 
> diff --git a/tools/perf/tests/shell/test_arm_spe_fork.sh b/tools/perf/tests/shell/test_arm_spe_fork.sh
> index c920d3583d30..da810e1b2b9e 100755
> --- a/tools/perf/tests/shell/test_arm_spe_fork.sh
> +++ b/tools/perf/tests/shell/test_arm_spe_fork.sh
> @@ -11,14 +11,7 @@ skip_if_no_arm_spe_event() {
>  
>  skip_if_no_arm_spe_event || exit 2
>  
> -# skip if there's no compiler
> -if ! [ -x "$(command -v cc)" ]; then
> -	echo "failed: no compiler, install gcc"
> -	exit 2
> -fi
> -
> -TEST_PROGRAM_SOURCE=$(mktemp /tmp/__perf_test.program.XXXXX.c)
> -TEST_PROGRAM=$(mktemp /tmp/__perf_test.program.XXXXX)
> +TEST_PROGRAM="perf test -w sqrtloop 10"
>  PERF_DATA=$(mktemp /tmp/__perf_test.perf.data.XXXXX)
>  PERF_RECORD_LOG=$(mktemp /tmp/__perf_test.log.XXXXX)
>  
> @@ -27,43 +20,10 @@ cleanup_files()
>  	echo "Cleaning up files..."
>  	rm -f ${PERF_RECORD_LOG}
>  	rm -f ${PERF_DATA}
> -	rm -f ${TEST_PROGRAM_SOURCE}
> -	rm -f ${TEST_PROGRAM}
>  }
>  
>  trap cleanup_files exit term int
>  
> -# compile test program
> -cat << EOF > $TEST_PROGRAM_SOURCE
> -#include <math.h>
> -#include <stdio.h>
> -#include <stdlib.h>
> -#include <unistd.h>
> -#include <sys/wait.h>
> -
> -int workload() {
> -  while (1)
> -    sqrt(rand());
> -  return 0;
> -}
> -
> -int main() {
> -  switch (fork()) {
> -    case 0:
> -      return workload();
> -    case -1:
> -      return 1;
> -    default:
> -      wait(NULL);
> -  }
> -  return 0;
> -}
> -EOF
> -
> -echo "Compiling test program..."
> -CFLAGS="-lm"
> -cc $TEST_PROGRAM_SOURCE $CFLAGS -o $TEST_PROGRAM || exit 1
> -
>  echo "Recording workload..."
>  perf record -o ${PERF_DATA} -e arm_spe/period=65536/ -vvv -- $TEST_PROGRAM > ${PERF_RECORD_LOG} 2>&1 &
>  PERFPID=$!
> @@ -78,8 +38,6 @@ echo Log lines after 1 second = $log1
>  
>  kill $PERFPID
>  wait $PERFPID
> -# test program may leave an orphan process running the workload
> -killall $(basename $TEST_PROGRAM)
>  
>  if [ "$log0" = "$log1" ];
>  then