Commit f215054d authored by Namhyung Kim's avatar Namhyung Kim Committed by Arnaldo Carvalho de Melo
Browse files

perf test: Add -w/--workload option 



The -w/--workload option is to run a simple workload used by testing.
This adds a basic framework to run the workloads and 'noploop' workload
as an example.

  $ perf test -w noploop

The noploop does a loop doing nothing (NOP) for a second by default.
It can have an optional argument to specify the time in seconds.

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/20221116233854.1596378-2-namhyung@kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent e664f31e

tools/perf/tests/Build

+2 −0
Original line number Diff line number Diff line
@@ -103,3 +103,5 @@ endif 
CFLAGS_attr.o         += -DBINDIR="BUILD_STR($(bindir_SQ))" -DPYTHON="BUILD_STR($(PYTHON_WORD))"

CFLAGS_python-use.o   += -DPYTHONPATH="BUILD_STR($(OUTPUT)python)" -DPYTHON="BUILD_STR($(PYTHON_WORD))"

CFLAGS_dwarf-unwind.o += -fno-optimize-sibling-calls



perf-y += workloads/

tools/perf/tests/builtin-test.c

+24 −0
Original line number Diff line number Diff line
@@ -118,6 +118,10 @@ static struct test_suite **tests[] = { 
	arch_tests,

};



static struct test_workload *workloads[] = {

	&workload__noploop,

};



static int num_subtests(const struct test_suite *t)

{

	int num;
@@ -475,6 +479,21 @@ static int perf_test__list(int argc, const char **argv) 
	return 0;

}



static int run_workload(const char *work, int argc, const char **argv)

{

	unsigned int i = 0;

	struct test_workload *twl;



	for (i = 0; i < ARRAY_SIZE(workloads); i++) {

		twl = workloads[i];

		if (!strcmp(twl->name, work))

			return twl->func(argc, argv);

	}



	pr_info("No workload found: %s\n", work);

	return -1;

}



int cmd_test(int argc, const char **argv)

{

	const char *test_usage[] = {
@@ -482,12 +501,14 @@ int cmd_test(int argc, const char **argv) 
	NULL,

	};

	const char *skip = NULL;

	const char *workload = NULL;

	const struct option test_options[] = {

	OPT_STRING('s', "skip", &skip, "tests", "tests to skip"),

	OPT_INCR('v', "verbose", &verbose,

		    "be more verbose (show symbol address, etc)"),

	OPT_BOOLEAN('F', "dont-fork", &dont_fork,

		    "Do not fork for testcase"),

	OPT_STRING('w', "workload", &workload, "work", "workload to run for testing"),

	OPT_END()

	};

	const char * const test_subcommands[] = { "list", NULL };
@@ -504,6 +525,9 @@ int cmd_test(int argc, const char **argv) 
	if (argc >= 1 && !strcmp(argv[0], "list"))

		return perf_test__list(argc - 1, argv + 1);



	if (workload)

		return run_workload(workload, argc, argv);



	symbol_conf.priv_size = sizeof(int);

	symbol_conf.sort_by_name = true;

	symbol_conf.try_vmlinux_path = true;

tools/perf/tests/tests.h

+22 −0
Original line number Diff line number Diff line
@@ -180,4 +180,26 @@ int test__arch_unwind_sample(struct perf_sample *sample, 
DECLARE_SUITE(vectors_page);

#endif



/*

 * Define test workloads to be used in test suites.

 */

typedef int (*workload_fnptr)(int argc, const char **argv);



struct test_workload {

	const char	*name;

	workload_fnptr	func;

};



#define DECLARE_WORKLOAD(work) \

	extern struct test_workload workload__##work



#define DEFINE_WORKLOAD(work) \

struct test_workload workload__##work = {	\

	.name = #work,				\

	.func = work,				\

}



/* The list of test workloads */

DECLARE_WORKLOAD(noploop);



#endif /* TESTS_H */

tools/perf/tests/workloads/Build

0 → 100644
+3 −0
Original line number Diff line number Diff line 
# SPDX-License-Identifier: GPL-2.0



perf-y += noploop.o

tools/perf/tests/workloads/noploop.c

0 → 100644
+32 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 */

#include <stdlib.h>

#include <signal.h>

#include <unistd.h>

#include <linux/compiler.h>

#include "../tests.h"



static volatile sig_atomic_t done;



static void sighandler(int sig __maybe_unused)

{

	done = 1;

}



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

{

	int sec = 1;



	if (argc > 0)

		sec = atoi(argv[0]);



	signal(SIGINT, sighandler);

	signal(SIGALRM, sighandler);

	alarm(sec);



	while (!done)

		continue;



	return 0;

}



DEFINE_WORKLOAD(noploop);