linux-kernel - [PATCH 12/12] perf test: Replace data symbol test workload with datasym

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Date:   Thu, 10 Nov 2022 10:19:20 -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>,
        Athira Jajeev <atrajeev@...ux.vnet.ibm.com>
Subject: [PATCH 12/12] perf test: Replace data symbol test workload with datasym

So that it can get rid of requirement of a compiler.

  $ sudo ./perf test -v 109
  109: Test data symbol                                                :
  --- start ---
  test child forked, pid 844526
  Recording workload...
  [ perf record: Woken up 2 times to write data ]
  [ perf record: Captured and wrote 0.354 MB /tmp/__perf_test.perf.data.GFeZO (4847 samples) ]
  Cleaning up files...
  test child finished with 0
  ---- end ----
  Test data symbol: Ok

Cc: Leo Yan <leo.yan@...aro.org>
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/tests/shell/test_data_symbol.sh | 29 +---------------------
 1 file changed, 1 insertion(+), 28 deletions(-)

diff --git a/tools/perf/tests/shell/test_data_symbol.sh b/tools/perf/tests/shell/test_data_symbol.sh
index cd6eb54d235d..d871e6c743ef 100755
--- a/tools/perf/tests/shell/test_data_symbol.sh
+++ b/tools/perf/tests/shell/test_data_symbol.sh
@@ -11,13 +11,7 @@ skip_if_no_mem_event() {
 
 skip_if_no_mem_event || exit 2
 
-# skip if there's no compiler
-if ! [ -x "$(command -v cc)" ]; then
-	echo "skip: no compiler, install gcc"
-	exit 2
-fi
-
-TEST_PROGRAM=$(mktemp /tmp/__perf_test.program.XXXXX)
+TEST_PROGRAM="perf test -w datasym"
 PERF_DATA=$(mktemp /tmp/__perf_test.perf.data.XXXXX)
 
 check_result() {
@@ -45,31 +39,10 @@ cleanup_files()
 {
 	echo "Cleaning up files..."
 	rm -f ${PERF_DATA}
-	rm -f ${TEST_PROGRAM}
 }
 
 trap cleanup_files exit term int
 
-# compile test program
-echo "Compiling test program..."
-cat << EOF | cc -o ${TEST_PROGRAM} -x c -
-typedef struct _buf {
-	char data1;
-	char reserved[55];
-	char data2;
-} buf __attribute__((aligned(64)));
-
-static buf buf1;
-
-int main(void) {
-	for (;;) {
-		buf1.data1++;
-		buf1.data2 += buf1.data1;
-	}
-	return 0;
-}
-EOF
-
 echo "Recording workload..."
 
 # perf mem/c2c internally uses IBS PMU on AMD CPU which doesn't support
-- 
2.38.1.493.g58b659f92b-goog