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

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Date:   Wed,  9 Nov 2022 09:46:31 -0800
From:   Namhyung Kim <namhyung@...nel.org>
To:     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>,
        James Clark <james.clark@....com>
Subject: [PATCH 08/12] perf test: Replace arm spe fork test workload with sqrtloop

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.

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(-)

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
-- 
2.38.1.431.g37b22c650d-goog