[PATCH 6/7] selftest: sync: stress consumer/producer test

[Emilio López]

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 
---
 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 000..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 
+
+#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(_data_mpsc.lock);
+   test_data_mpsc.counter++;
+   pthread_mutex_unlock(_data_mpsc.lock);
+
+   ASSERT(sw_sync_timeline_inc(producer_timelines[id], 1) == 0,
+  "Error advancing producer timeline\n");
+
+   sw_sync_fence_destroy(fence);
+  

[PATCH 6/7] selftest: sync: stress consumer/producer test

[Emilio López]

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 
---
 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 000..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 
+
+#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(_data_mpsc.lock);
+   test_data_mpsc.counter++;
+   pthread_mutex_unlock(_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;
+}
+