Commit 69b35292 authored by Namhyung Kim's avatar Namhyung Kim Committed by Arnaldo Carvalho de Melo
Browse files

perf test: Add 'thloop' test workload 



The thloop is similar to noploop but runs in two threads.  This is
needed to verify perf record --per-thread to handle multi-threaded
programs properly.

  $ perf test -w thloop

It also takes an optional argument to specify runtime in seconds
(default: 1).

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/20221116233854.1596378-4-namhyung@kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 24e733b2

tools/perf/tests/builtin-test.c

+1 −0
Original line number Diff line number Diff line
@@ -120,6 +120,7 @@ static struct test_suite **tests[] = { 


static struct test_workload *workloads[] = {

	&workload__noploop,

	&workload__thloop,

};



static int num_subtests(const struct test_suite *t)

tools/perf/tests/tests.h

+1 −0
Original line number Diff line number Diff line
@@ -201,5 +201,6 @@ struct test_workload workload__##work = { \ 


/* The list of test workloads */

DECLARE_WORKLOAD(noploop);

DECLARE_WORKLOAD(thloop);



#endif /* TESTS_H */

tools/perf/tests/workloads/Build

+1 −0
Original line number Diff line number Diff line 
# SPDX-License-Identifier: GPL-2.0



perf-y += noploop.o

perf-y += thloop.o

tools/perf/tests/workloads/thloop.c

0 → 100644
+53 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 */

#include <pthread.h>

#include <stdlib.h>

#include <signal.h>

#include <unistd.h>

#include <linux/compiler.h>

#include "../tests.h"



static volatile sig_atomic_t done;

static volatile unsigned count;



/* We want to check this symbol in perf report */

noinline void test_loop(void);



static void sighandler(int sig __maybe_unused)

{

	done = 1;

}



noinline void test_loop(void)

{

	while (!done)

		count++;

}



static void *thfunc(void *arg)

{

	void (*loop_fn)(void) = arg;



	loop_fn();

	return NULL;

}



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

{

	int sec = 1;

	pthread_t th;



	if (argc > 0)

		sec = atoi(argv[0]);



	signal(SIGINT, sighandler);

	signal(SIGALRM, sighandler);

	alarm(sec);



	pthread_create(&th, NULL, thfunc, test_loop);

	test_loop();

	pthread_join(th, NULL);



	return 0;

}



DEFINE_WORKLOAD(thloop);