LXR linux/tools/testing/selftests/sync/sync_stress

   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
  36int 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