Commit 41522f74 authored by Namhyung Kim's avatar Namhyung Kim Committed by Arnaldo Carvalho de Melo
Browse files

perf test: Add 'leafloop' test workload 



The leafloop workload is to run an infinite loop in the test_leaf
function.  This is needed for the ARM fp callgraph test to verify if it
gets the correct callchains.

  $ perf test -w leafloop

Committer notes:

Add a:

  -U_FORTIFY_SOURCE

to the leafloop CFLAGS as the main perf flags set it and it requires
building with optimization, and this new test has a -O0.

Signed-off-by: default avatarNamhyung Kim <namhyung@kernel.org>
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: James Clark <james.clark@arm.com>
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/20221116233854.1596378-6-namhyung@kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 0b8ff0ba

tools/perf/tests/builtin-test.c

+1 −0
Original line number Diff line number Diff line
@@ -121,6 +121,7 @@ static struct test_suite **tests[] = { 
static struct test_workload *workloads[] = {

	&workload__noploop,

	&workload__thloop,

	&workload__leafloop,

};



static int num_subtests(const struct test_suite *t)

tools/perf/tests/tests.h

+1 −0
Original line number Diff line number Diff line
@@ -202,5 +202,6 @@ struct test_workload workload__##work = { \ 
/* The list of test workloads */

DECLARE_WORKLOAD(noploop);

DECLARE_WORKLOAD(thloop);

DECLARE_WORKLOAD(leafloop);



#endif /* TESTS_H */

tools/perf/tests/workloads/Build

+3 −0
Original line number Diff line number Diff line
@@ -2,3 +2,6 @@ 


perf-y += noploop.o

perf-y += thloop.o

perf-y += leafloop.o



CFLAGS_leafloop.o         = -g -O0 -fno-inline -fno-omit-frame-pointer -U_FORTIFY_SOURCE

tools/perf/tests/workloads/leafloop.c

0 → 100644
+34 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 */

#include <stdlib.h>

#include <linux/compiler.h>

#include "../tests.h"



/* We want to check these symbols in perf script */

noinline void leaf(volatile int b);

noinline void parent(volatile int b);



static volatile int a;



noinline void leaf(volatile int b)

{

	for (;;)

		a += b;

}



noinline void parent(volatile int b)

{

	leaf(b);

}



static int leafloop(int argc, const char **argv)

{

	int c = 1;



	if (argc > 0)

		c = atoi(argv[0]);



	parent(c);

	return 0;

}



DEFINE_WORKLOAD(leafloop);