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Commit 54b519f3 authored by Emilio López's avatar Emilio López Committed by Shuah Khan
Browse files

selftest: sync: stress test for parallelism 



This test is based on the libsync test suite from Android.
This commit includes a stress test that invokes operations
in parallel.

Signed-off-by: default avatarEmilio López <emilio.lopez@collabora.co.uk>
Signed-off-by: default avatarShuah Khan <shuahkh@osg.samsung.com>
parent fdba7cff

tools/testing/selftests/sync/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -14,6 +14,7 @@ TESTS += sync_alloc.o 
TESTS += sync_fence.o

TESTS += sync_merge.o

TESTS += sync_wait.o

TESTS += sync_stress_parallelism.o



sync_test: $(OBJS) $(TESTS)

tools/testing/selftests/sync/sync_stress_parallelism.c

0 → 100644
+111 −0
Original line number Diff line number Diff line 
/*

 *  sync stress test: parallelism

 *  Copyright 2015-2016 Collabora Ltd.

 *

 *  Based on the implementation from the Android Open Source Project,

 *

 *  Copyright 2012 Google, Inc

 *

 *  Permission is hereby granted, free of charge, to any person obtaining a

 *  copy of this software and associated documentation files (the "Software"),

 *  to deal in the Software without restriction, including without limitation

 *  the rights to use, copy, modify, merge, publish, distribute, sublicense,

 *  and/or sell copies of the Software, and to permit persons to whom the

 *  Software is furnished to do so, subject to the following conditions:

 *

 *  The above copyright notice and this permission notice shall be included in

 *  all copies or substantial portions of the Software.

 *

 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

 *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR

 *  OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,

 *  ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR

 *  OTHER DEALINGS IN THE SOFTWARE.

 */



#include <pthread.h>



#include "sync.h"

#include "sw_sync.h"

#include "synctest.h"



static struct {

	int iterations;

	int timeline;

	int counter;

} test_data_two_threads;



static int test_stress_two_threads_shared_timeline_thread(void *d)

{

	int thread_id = (long)d;

	int timeline = test_data_two_threads.timeline;

	int iterations = test_data_two_threads.iterations;

	int fence, valid, ret, i;



	for (i = 0; i < iterations; i++) {

		fence = sw_sync_fence_create(timeline, "fence",

					     i * 2 + thread_id);

		valid = sw_sync_fence_is_valid(fence);

		ASSERT(valid, "Failure allocating fence\n");



		/* Wait on the prior thread to complete */

		ret = sync_wait(fence, -1);

		ASSERT(ret > 0, "Problem occurred on prior thread\n");



		/*

		 * Confirm the previous thread's writes are visible

		 * and then increment

		 */

		ASSERT(test_data_two_threads.counter == i * 2 + thread_id,

		       "Counter got damaged!\n");

		test_data_two_threads.counter++;



		/* Kick off the other thread */

		ret = sw_sync_timeline_inc(timeline, 1);

		ASSERT(ret == 0, "Advancing timeline failed\n");



		sw_sync_fence_destroy(fence);

	}



	return 0;

}



int test_stress_two_threads_shared_timeline(void)

{

	pthread_t a, b;

	int valid;

	int timeline = sw_sync_timeline_create();



	valid = sw_sync_timeline_is_valid(timeline);

	ASSERT(valid, "Failure allocating timeline\n");



	test_data_two_threads.iterations = 1 << 16;

	test_data_two_threads.counter = 0;

	test_data_two_threads.timeline = timeline;



	/*

	 * Use a single timeline to synchronize two threads

	 * hammmering on the same counter.

	 */



	pthread_create(&a, NULL, (void *(*)(void *))

		       test_stress_two_threads_shared_timeline_thread,

		       (void *)0);

	pthread_create(&b, NULL, (void *(*)(void *))

		       test_stress_two_threads_shared_timeline_thread,

		       (void *)1);



	pthread_join(a, NULL);

	pthread_join(b, NULL);



	/* make sure the threads did not trample on one another */

	ASSERT(test_data_two_threads.counter ==

	       test_data_two_threads.iterations * 2,

	       "Counter has unexpected value\n");



	sw_sync_timeline_destroy(timeline);



	return 0;

}

tools/testing/selftests/sync/sync_test.c

+1 −0
Original line number Diff line number Diff line
@@ -66,6 +66,7 @@ int main(void) 
	err += RUN_TEST(test_fence_one_timeline_merge);

	err += RUN_TEST(test_fence_merge_same_fence);

	err += RUN_TEST(test_fence_multi_timeline_wait);

	err += RUN_TEST(test_stress_two_threads_shared_timeline);



	if (err)

		printf("[FAIL]\tsync errors: %d\n", err);

tools/testing/selftests/sync/synctest.h

+3 −0
Original line number Diff line number Diff line
@@ -54,4 +54,7 @@ int test_fence_merge_same_fence(void); 
/* Fence wait tests */

int test_fence_multi_timeline_wait(void);



/* Stress test - parallelism */

int test_stress_two_threads_shared_timeline(void);



#endif