/*
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* sync stress test: parallelism
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* Copyright 2015-2016 Collabora Ltd.
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*
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* Based on the implementation from the Android Open Source Project,
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*
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* Copyright 2012 Google, Inc
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <pthread.h>
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#include "sync.h"
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#include "sw_sync.h"
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#include "synctest.h"
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static struct {
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int iterations;
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int timeline;
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int counter;
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} test_data_two_threads;
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static int test_stress_two_threads_shared_timeline_thread(void *d)
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{
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int thread_id = (long)d;
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int timeline = test_data_two_threads.timeline;
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int iterations = test_data_two_threads.iterations;
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int fence, valid, ret, i;
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for (i = 0; i < iterations; i++) {
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fence = sw_sync_fence_create(timeline, "fence",
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i * 2 + thread_id);
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valid = sw_sync_fence_is_valid(fence);
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ASSERT(valid, "Failure allocating fence\n");
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/* Wait on the prior thread to complete */
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ret = sync_wait(fence, -1);
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ASSERT(ret > 0, "Problem occurred on prior thread\n");
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/*
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* Confirm the previous thread's writes are visible
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* and then increment
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*/
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ASSERT(test_data_two_threads.counter == i * 2 + thread_id,
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"Counter got damaged!\n");
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test_data_two_threads.counter++;
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/* Kick off the other thread */
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ret = sw_sync_timeline_inc(timeline, 1);
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ASSERT(ret == 0, "Advancing timeline failed\n");
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sw_sync_fence_destroy(fence);
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}
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return 0;
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}
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int test_stress_two_threads_shared_timeline(void)
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{
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pthread_t a, b;
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int valid;
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int timeline = sw_sync_timeline_create();
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valid = sw_sync_timeline_is_valid(timeline);
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ASSERT(valid, "Failure allocating timeline\n");
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test_data_two_threads.iterations = 1 << 16;
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test_data_two_threads.counter = 0;
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test_data_two_threads.timeline = timeline;
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/*
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* Use a single timeline to synchronize two threads
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* hammmering on the same counter.
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*/
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pthread_create(&a, NULL, (void *(*)(void *))
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test_stress_two_threads_shared_timeline_thread,
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(void *)0);
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pthread_create(&b, NULL, (void *(*)(void *))
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test_stress_two_threads_shared_timeline_thread,
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(void *)1);
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pthread_join(a, NULL);
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pthread_join(b, NULL);
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/* make sure the threads did not trample on one another */
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ASSERT(test_data_two_threads.counter ==
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test_data_two_threads.iterations * 2,
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"Counter has unexpected value\n");
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sw_sync_timeline_destroy(timeline);
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return 0;
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}
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