1 /*
2  *  sync stress test: merging
3  *  Copyright 2015-2016 Collabora Ltd.
4  *
5  *  Based on the implementation from the Android Open Source Project,
6  *
7  *  Copyright 2012 Google, Inc
8  *
9  *  Permission is hereby granted, free of charge, to any person obtaining a
10  *  copy of this software and associated documentation files (the "Software"),
11  *  to deal in the Software without restriction, including without limitation
12  *  the rights to use, copy, modify, merge, publish, distribute, sublicense,
13  *  and/or sell copies of the Software, and to permit persons to whom the
14  *  Software is furnished to do so, subject to the following conditions:
15  *
16  *  The above copyright notice and this permission notice shall be included in
17  *  all copies or substantial portions of the Software.
18  *
19  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20  *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21  *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22  *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
23  *  OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
24  *  ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
25  *  OTHER DEALINGS IN THE SOFTWARE.
26  */
27 
28 #include <stdlib.h>
29 #include <string.h>
30 #include <time.h>
31 
32 #include "sync.h"
33 #include "sw_sync.h"
34 #include "synctest.h"
35 
test_merge_stress_random_merge(void)36 int test_merge_stress_random_merge(void)
37 {
38 	int i, size, ret;
39 	int timeline_count = 32;
40 	int merge_count = 1024 * 32;
41 	int timelines[timeline_count];
42 	int fence_map[timeline_count];
43 	int fence, tmpfence, merged, valid;
44 	int timeline, timeline_offset, sync_point;
45 
46 	srand(time(NULL));
47 
48 	for (i = 0; i < timeline_count; i++)
49 		timelines[i] = sw_sync_timeline_create();
50 
51 	fence = sw_sync_fence_create(timelines[0], "fence", 0);
52 	valid = sw_sync_fence_is_valid(fence);
53 	ASSERT(valid, "Failure creating fence\n");
54 
55 	memset(fence_map, -1, sizeof(fence_map));
56 	fence_map[0] = 0;
57 
58 	/*
59 	 * Randomly create sync_points out of a fixed set of timelines,
60 	 * and merge them together
61 	 */
62 	for (i = 0; i < merge_count; i++) {
63 		/* Generate sync_point. */
64 		timeline_offset = rand() % timeline_count;
65 		timeline = timelines[timeline_offset];
66 		sync_point = rand();
67 
68 		/* Keep track of the latest sync_point in each timeline. */
69 		if (fence_map[timeline_offset] == -1)
70 			fence_map[timeline_offset] = sync_point;
71 		else if (fence_map[timeline_offset] < sync_point)
72 			fence_map[timeline_offset] = sync_point;
73 
74 		/* Merge */
75 		tmpfence = sw_sync_fence_create(timeline, "fence", sync_point);
76 		merged = sync_merge("merge", tmpfence, fence);
77 		sw_sync_fence_destroy(tmpfence);
78 		sw_sync_fence_destroy(fence);
79 		fence = merged;
80 
81 		valid = sw_sync_fence_is_valid(merged);
82 		ASSERT(valid, "Failure creating fence i\n");
83 	}
84 
85 	size = 0;
86 	for (i = 0; i < timeline_count; i++)
87 		if (fence_map[i] != -1)
88 			size++;
89 
90 	/* Confirm our map matches the fence. */
91 	ASSERT(sync_fence_size(fence) == size,
92 	       "Quantity of elements not matching\n");
93 
94 	/* Trigger the merged fence */
95 	for (i = 0; i < timeline_count; i++) {
96 		if (fence_map[i] != -1) {
97 			ret = sync_wait(fence, 0);
98 			ASSERT(ret == 0,
99 			       "Failure waiting on fence until timeout\n");
100 			/* Increment the timeline to the last sync_point */
101 			sw_sync_timeline_inc(timelines[i], fence_map[i]);
102 		}
103 	}
104 
105 	/* Check that the fence is triggered. */
106 	ret = sync_wait(fence, 0);
107 	ASSERT(ret > 0, "Failure triggering fence\n");
108 
109 	sw_sync_fence_destroy(fence);
110 
111 	for (i = 0; i < timeline_count; i++)
112 		sw_sync_timeline_destroy(timelines[i]);
113 
114 	return 0;
115 }
116