Commit 24e733b2 authored by Namhyung Kim's avatar Namhyung Kim Committed by Arnaldo Carvalho de Melo
Browse files

perf test: Replace pipe test workload with noploop 



So that it can get rid of requirement of a compiler.
Also define and use more local symbols to ease future changes.

  $ sudo ./perf test -v pipe
   87: perf pipe recording and injection test                          :
  --- start ---
  test child forked, pid 748003
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.000 MB - ]
      748014   748014       -1 |perf
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.000 MB - ]
      99.83%  perf     perf                  [.] noploop
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.000 MB - ]
      99.85%  perf     perf                  [.] noploop
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.160 MB /tmp/perf.data.2XYPdw (4007 samples) ]
      99.83%  perf     perf                  [.] noploop
  test child finished with 0
  ---- end ----
  perf pipe recording and injection test: Ok

Signed-off-by: default avatarNamhyung Kim <namhyung@kernel.org>
Tested-by: default avatarJames Clark <james.clark@arm.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Zhengjun Xing <zhengjun.xing@linux.intel.com>
Link: https://lore.kernel.org/r/20221116233854.1596378-3-namhyung@kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent f215054d

tools/perf/tests/shell/pipe_test.sh

+10 −45
Original line number Diff line number Diff line
@@ -2,68 +2,33 @@ 
# perf pipe recording and injection test

# SPDX-License-Identifier: GPL-2.0



# skip if there's no compiler

if ! [ -x "$(command -v cc)" ]; then

	echo "failed: no compiler, install gcc"

	exit 2

fi



file=$(mktemp /tmp/test.file.XXXXXX)

data=$(mktemp /tmp/perf.data.XXXXXX)

prog="perf test -w noploop"

task="perf"

sym="noploop"



cat <<EOF | cc -o ${file} -x c -

#include <signal.h>

#include <stdlib.h>

#include <unistd.h>



volatile int done;



void sigalrm(int sig) {

	done = 1;

}



__attribute__((noinline)) void noploop(void) {

	while (!done)

		continue;

}



int main(int argc, char *argv[]) {

	int sec = 1;



	if (argc > 1)

		sec = atoi(argv[1]);



	signal(SIGALRM, sigalrm);

	alarm(sec);



	noploop();

	return 0;

}

EOF





if ! perf record -e task-clock:u -o - ${file} | perf report -i - --task | grep test.file; then

if ! perf record -e task-clock:u -o - ${prog} | perf report -i - --task | grep ${task}; then

	echo "cannot find the test file in the perf report"

	exit 1

fi



if ! perf record -e task-clock:u -o - ${file} | perf inject -b | perf report -i - | grep noploop; then

if ! perf record -e task-clock:u -o - ${prog} | perf inject -b | perf report -i - | grep ${sym}; then

	echo "cannot find noploop function in pipe #1"

	exit 1

fi



perf record -e task-clock:u -o - ${file} | perf inject -b -o ${data}

if ! perf report -i ${data} | grep noploop; then

perf record -e task-clock:u -o - ${prog} | perf inject -b -o ${data}

if ! perf report -i ${data} | grep ${sym}; then

	echo "cannot find noploop function in pipe #2"

	exit 1

fi



perf record -e task-clock:u -o ${data} ${file}

if ! perf inject -b -i ${data} | perf report -i - | grep noploop; then

perf record -e task-clock:u -o ${data} ${prog}

if ! perf inject -b -i ${data} | perf report -i - | grep ${sym}; then

	echo "cannot find noploop function in pipe #3"

	exit 1

fi





rm -f ${file} ${data} ${data}.old

rm -f ${data} ${data}.old

exit 0