/* * 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.
*/
/* 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 */ staticint 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;
}
staticstruct { int iterations; int threads; int counter; int consumer_timeline; int *producer_timelines;
pthread_mutex_t lock;
} test_data_mpsc;
staticint 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);
staticint 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;
}
/* * 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");
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();
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