Commit 7bc1dd96 authored by Namhyung Kim's avatar Namhyung Kim Committed by Arnaldo Carvalho de Melo
Browse files

perf test: Replace brstack test workload 



So that it can get rid of requirement of a compiler.  Also rename the
symbols to match with the perf test workload.

Signed-off-by: default avatarNamhyung Kim <namhyung@kernel.org>
Tested-by: default avatarJames Clark <james.clark@arm.com>
Acked-by: default avatarGerman Gomez <german.gomez@arm.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Athira Jajeev <atrajeev@linux.vnet.ibm.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/20221116233854.1596378-11-namhyung@kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent a104f0ea

tools/perf/tests/shell/test_brstack.sh

+12 −54
Original line number Diff line number Diff line
@@ -4,13 +4,6 @@ 
# SPDX-License-Identifier: GPL-2.0

# German Gomez <german.gomez@arm.com>, 2022



# we need a C compiler to build the test programs

# so bail if none is found

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

	echo "failed: no compiler, install gcc"

	exit 2

fi



# skip the test if the hardware doesn't support branch stack sampling

# and if the architecture doesn't support filter types: any,save_type,u

if ! perf record -o- --no-buildid --branch-filter any,save_type,u -- true > /dev/null 2>&1 ; then
@@ -19,6 +12,7 @@ if ! perf record -o- --no-buildid --branch-filter any,save_type,u -- true > /dev 
fi



TMPDIR=$(mktemp -d /tmp/__perf_test.program.XXXXX)

TESTPROG="perf test -w brstack"



cleanup() {

	rm -rf $TMPDIR
@@ -26,57 +20,24 @@ cleanup() { 


trap cleanup exit term int



gen_test_program() {

	# generate test program

	cat << EOF > $1

#define BENCH_RUNS 999999

int cnt;

void bar(void) {

}			/* return */

void foo(void) {

	bar();		/* call */

}			/* return */

void bench(void) {

  void (*foo_ind)(void) = foo;

  if ((cnt++) % 3)	/* branch (cond) */

    foo();		/* call */

  bar();		/* call */

  foo_ind();		/* call (ind) */

}

int main(void)

{

  int cnt = 0;

  while (1) {

    if ((cnt++) > BENCH_RUNS)

      break;

    bench();		/* call */

  }			/* branch (uncond) */

  return 0;

}

EOF

}



test_user_branches() {

	echo "Testing user branch stack sampling"



	gen_test_program "$TEMPDIR/program.c"

	cc -fno-inline -g "$TEMPDIR/program.c" -o $TMPDIR/a.out



	perf record -o $TMPDIR/perf.data --branch-filter any,save_type,u -- $TMPDIR/a.out > /dev/null 2>&1

	perf record -o $TMPDIR/perf.data --branch-filter any,save_type,u -- ${TESTPROG} > /dev/null 2>&1

	perf script -i $TMPDIR/perf.data --fields brstacksym | xargs -n1 > $TMPDIR/perf.script



	# example of branch entries:

	# 	foo+0x14/bar+0x40/P/-/-/0/CALL

	# 	brstack_foo+0x14/brstack_bar+0x40/P/-/-/0/CALL



	set -x

	egrep -m1 "^bench\+[^ ]*/foo\+[^ ]*/IND_CALL$"	$TMPDIR/perf.script

	egrep -m1 "^foo\+[^ ]*/bar\+[^ ]*/CALL$"	$TMPDIR/perf.script

	egrep -m1 "^bench\+[^ ]*/foo\+[^ ]*/CALL$"	$TMPDIR/perf.script

	egrep -m1 "^bench\+[^ ]*/bar\+[^ ]*/CALL$"	$TMPDIR/perf.script

	egrep -m1 "^bar\+[^ ]*/foo\+[^ ]*/RET$"		$TMPDIR/perf.script

	egrep -m1 "^foo\+[^ ]*/bench\+[^ ]*/RET$"	$TMPDIR/perf.script

	egrep -m1 "^bench\+[^ ]*/bench\+[^ ]*/COND$"	$TMPDIR/perf.script

	egrep -m1 "^main\+[^ ]*/main\+[^ ]*/UNCOND$"	$TMPDIR/perf.script

	egrep -m1 "^brstack_bench\+[^ ]*/brstack_foo\+[^ ]*/IND_CALL$"	$TMPDIR/perf.script

	egrep -m1 "^brstack_foo\+[^ ]*/brstack_bar\+[^ ]*/CALL$"	$TMPDIR/perf.script

	egrep -m1 "^brstack_bench\+[^ ]*/brstack_foo\+[^ ]*/CALL$"	$TMPDIR/perf.script

	egrep -m1 "^brstack_bench\+[^ ]*/brstack_bar\+[^ ]*/CALL$"	$TMPDIR/perf.script

	egrep -m1 "^brstack_bar\+[^ ]*/brstack_foo\+[^ ]*/RET$"		$TMPDIR/perf.script

	egrep -m1 "^brstack_foo\+[^ ]*/brstack_bench\+[^ ]*/RET$"	$TMPDIR/perf.script

	egrep -m1 "^brstack_bench\+[^ ]*/brstack_bench\+[^ ]*/COND$"	$TMPDIR/perf.script

	egrep -m1 "^brstack\+[^ ]*/brstack\+[^ ]*/UNCOND$"		$TMPDIR/perf.script

	set +x



	# some branch types are still not being tested:
@@ -91,10 +52,7 @@ test_filter() { 


	echo "Testing branch stack filtering permutation ($filter,$expect)"



	gen_test_program "$TEMPDIR/program.c"

	cc -fno-inline -g "$TEMPDIR/program.c" -o $TMPDIR/a.out



	perf record -o $TMPDIR/perf.data --branch-filter $filter,save_type,u -- $TMPDIR/a.out > /dev/null 2>&1

	perf record -o $TMPDIR/perf.data --branch-filter $filter,save_type,u -- ${TESTPROG} > /dev/null 2>&1

	perf script -i $TMPDIR/perf.data --fields brstack | xargs -n1 > $TMPDIR/perf.script



	# fail if we find any branch type that doesn't match any of the expected ones