This test is based on the libsync test suite from Android.
This commit includes a stress test that replicates a
consumer/producer pattern.
Signed-off-by: Emilio López <emilio.lopez@xxxxxxxxxxxxxxx>
---
tools/testing/selftests/sync/Makefile | 1 +
.../testing/selftests/sync/sync_stress_consumer.c | 185 +++++++++++++++++++++
tools/testing/selftests/sync/sync_test.c | 1 +
tools/testing/selftests/sync/synctest.h | 3 +
4 files changed, 190 insertions(+)
create mode 100644 tools/testing/selftests/sync/sync_stress_consumer.c
diff --git a/tools/testing/selftests/sync/Makefile b/tools/testing/selftests/sync/Makefile
index 1ed2864..910e3f9 100644
--- a/tools/testing/selftests/sync/Makefile
+++ b/tools/testing/selftests/sync/Makefile
@@ -19,6 +19,7 @@ TESTS += sync_fence.o
TESTS += sync_merge.o
TESTS += sync_wait.o
TESTS += sync_stress_parallelism.o
+TESTS += sync_stress_consumer.o
sync_test: $(SRC) $(TESTS)
diff --git a/tools/testing/selftests/sync/sync_stress_consumer.c b/tools/testing/selftests/sync/sync_stress_consumer.c
new file mode 100644
index 0000000..d9eff8d
--- /dev/null
+++ b/tools/testing/selftests/sync/sync_stress_consumer.c
@@ -0,0 +1,185 @@
+/*
+ * sync stress test: producer/consumer
+ * 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"
+
+/* IMPORTANT NOTE: if you see this test failing on your system, it may be
+ * due to a shortage of file descriptors. Please ensure your system has
+ * a sensible limit for this test to finish correctly.
+ */
+
+/* Returns 1 on error, 0 on success */
+static int busy_wait_on_fence(int fence)
+{
+ int error, active;
+
+ do {
+ error = sync_fence_count_with_status(fence, FENCE_STATUS_ERROR);
+ ASSERT(error == 0, "Error occurred on fence\n");
+ active = sync_fence_count_with_status(fence,
+ FENCE_STATUS_ACTIVE);
+ } while (active);
+
+ return 0;
+}
+
+static struct {
+ int iterations;
+ int threads;
+ int counter;
+ int consumer_timeline;
+ int *producer_timelines;
+ pthread_mutex_t lock;
+} test_data_mpsc;
+
+static int mpsc_producer_thread(void *d)
+{
+ int id = (long)d;
+ int fence, valid, i;
+ int *producer_timelines = test_data_mpsc.producer_timelines;
+ int consumer_timeline = test_data_mpsc.consumer_timeline;
+ int iterations = test_data_mpsc.iterations;
+
+ for (i = 0; i < iterations; i++) {
+ fence = sw_sync_fence_create(consumer_timeline, "fence", i);
+ valid = sw_sync_fence_is_valid(fence);
+ ASSERT(valid, "Failure creating fence\n");
+
+ /*
+ * Wait for the consumer to finish. Use alternate
+ * means of waiting on the fence
+ */
+
+ if ((iterations + id) % 8 != 0) {
+ ASSERT(sync_wait(fence, -1) > 0,
+ "Failure waiting on fence\n");
+ } else {
+ ASSERT(busy_wait_on_fence(fence) == 0,
+ "Failure waiting on fence\n");
+ }
+
+ /*
+ * Every producer increments the counter, the consumer
+ * checks and erases it
+ */
+ pthread_mutex_lock(&test_data_mpsc.lock);
+ test_data_mpsc.counter++;
+ pthread_mutex_unlock(&test_data_mpsc.lock);
+
+ ASSERT(sw_sync_timeline_inc(producer_timelines[id], 1) == 0,
+ "Error advancing producer timeline\n");
+
+ sw_sync_fence_destroy(fence);
+ }
+
+ return 0;
+}
+
+static int mpcs_consumer_thread(void)
+{
+ int fence, merged, tmp, valid, it, i;
+ int *producer_timelines = test_data_mpsc.producer_timelines;
+ int consumer_timeline = test_data_mpsc.consumer_timeline;
+ int iterations = test_data_mpsc.iterations;
+ int n = test_data_mpsc.threads;
+
+ for (it = 1; it <= iterations; it++) {
+ fence = sw_sync_fence_create(producer_timelines[0], "name", it);
+ for (i = 1; i < n; i++) {
+ tmp = sw_sync_fence_create(producer_timelines[i],
+ "name", it);
+ merged = sync_merge("name", tmp, fence);
+ sw_sync_fence_destroy(tmp);
+ sw_sync_fence_destroy(fence);
+ fence = merged;
+ }
+
+ valid = sw_sync_fence_is_valid(fence);
+ ASSERT(valid, "Failure merging fences\n");
+
+ /*
+ * Make sure we see an increment from every producer thread.
+ * Vary the means by which we wait.
+ */
+ if (iterations % 8 != 0) {
+ ASSERT(sync_wait(fence, -1) > 0,
+ "Producers did not increment as expected\n");
+ } else {
+ ASSERT(busy_wait_on_fence(fence) == 0,
+ "Producers did not increment as expected\n");
+ }
+
+ ASSERT(test_data_mpsc.counter == n * it,
+ "Counter value mismatch!\n");
+
+ /* Release the producer threads */
+ ASSERT(sw_sync_timeline_inc(consumer_timeline, 1) == 0,
+ "Failure releasing producer threads\n");
+
+ sw_sync_fence_destroy(fence);
+ }
+
+ return 0;
+}
+
+int test_consumer_stress_multi_producer_single_consumer(void)
+{
+ int iterations = 1 << 12;
+ int n = 5;
+ long i, ret;
+ int producer_timelines[n];
+ int consumer_timeline;
+ pthread_t threads[n];
+
+ consumer_timeline = sw_sync_timeline_create();
+ for (i = 0; i < n; i++)
+ producer_timelines[i] = sw_sync_timeline_create();
+
+ test_data_mpsc.producer_timelines = producer_timelines;
+ test_data_mpsc.consumer_timeline = consumer_timeline;
+ test_data_mpsc.iterations = iterations;
+ test_data_mpsc.threads = n;
+ test_data_mpsc.counter = 0;
+ pthread_mutex_init(&test_data_mpsc.lock, NULL);
+
+ for (i = 0; i < n; i++) {
+ pthread_create(&threads[i], NULL, (void * (*)(void *))
+ mpsc_producer_thread, (void *)i);
+ }
+
+ /* Consumer thread runs here */
+ ret = mpcs_consumer_thread();
+
+ for (i = 0; i < n; i++)
+ pthread_join(threads[i], NULL);
+
+ return ret;
+}
diff --git a/tools/testing/selftests/sync/sync_test.c b/tools/testing/selftests/sync/sync_test.c
index 3bb1024..32f2534 100644
--- a/tools/testing/selftests/sync/sync_test.c
+++ b/tools/testing/selftests/sync/sync_test.c
@@ -67,6 +67,7 @@ int main(void)
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);
+ err += RUN_TEST(test_consumer_stress_multi_producer_single_consumer);
if (err)
printf("[FAIL]\tsync errors: %d\n", err);
diff --git a/tools/testing/selftests/sync/synctest.h b/tools/testing/selftests/sync/synctest.h
index c461577..a94b622 100644
--- a/tools/testing/selftests/sync/synctest.h
+++ b/tools/testing/selftests/sync/synctest.h
@@ -57,4 +57,7 @@ int test_fence_multi_timeline_wait(void);
/* Stress test - parallelism */
int test_stress_two_threads_shared_timeline(void);
+/* Stress test - consumer */
+int test_consumer_stress_multi_producer_single_consumer(void);
+
#endif
--
2.9.3
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