ceph/src/spdk/dpdk/test/test/test_event_ring.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2017 Intel Corporation
   3  */
   4
   5 #include <string.h>
   6
   7 #include <rte_event_ring.h>
   8
   9 #include "test.h"
  10
  11 /*
  12  * Event Ring
  13  * ===========
  14  *
  15  * Test some basic ops for the event rings.
  16  * Does not fully test everything, since most code is reused from rte_ring
  17  * library and tested as part of the normal ring autotests.
  18  */
  19
  20 #define RING_SIZE 4096
  21 #define MAX_BULK 32
  22
  23 static struct rte_event_ring *r;
  24
  25 /*
  26  * ensure failure to create ring with a bad ring size
  27  */
  28 static int
  29 test_event_ring_creation_with_wrong_size(void)
  30 {
  31         struct rte_event_ring *rp = NULL;
  32
  33         /* Test if ring size is not power of 2 */
  34         rp = rte_event_ring_create("test_bad_ring_size", RING_SIZE + 1,
  35                         SOCKET_ID_ANY, 0);
  36         if (rp != NULL)
  37                 return -1;
  38
  39         /* Test if ring size is exceeding the limit */
  40         rp = rte_event_ring_create("test_bad_ring_size", (RTE_RING_SZ_MASK + 1),
  41                         SOCKET_ID_ANY, 0);
  42         if (rp != NULL)
  43                 return -1;
  44         return 0;
  45 }
  46
  47 /*
  48  * Test to check if a non-power-of-2 count causes the create
  49  * function to fail correctly
  50  */
  51 static int
  52 test_create_count_odd(void)
  53 {
  54         struct rte_event_ring *r = rte_event_ring_create("test_event_ring_count",
  55                         4097, SOCKET_ID_ANY, 0);
  56         if (r != NULL)
  57                 return -1;
  58         return 0;
  59 }
  60
  61 static int
  62 test_lookup_null(void)
  63 {
  64         struct rte_event_ring *rlp = rte_event_ring_lookup("ring_not_found");
  65         if (rlp == NULL && rte_errno != ENOENT) {
  66                 printf("test failed to return error on null pointer\n");
  67                 return -1;
  68         }
  69         return 0;
  70 }
  71
  72 static int
  73 test_basic_event_enqueue_dequeue(void)
  74 {
  75         struct rte_event_ring *sr = NULL;
  76         struct rte_event evs[16];
  77         uint16_t ret, free_count, used_count;
  78
  79         memset(evs, 0, sizeof(evs));
  80         sr = rte_event_ring_create("spsc_ring", 32, rte_socket_id(),
  81                         RING_F_SP_ENQ | RING_F_SC_DEQ);
  82         if (sr == NULL) {
  83                 printf("Failed to create sp/sc ring\n");
  84                 return -1;
  85         }
  86         if (rte_event_ring_get_capacity(sr) != 31) {
  87                 printf("Error, invalid capacity\n");
  88                 goto error;
  89         }
  90
  91         /* test sp/sc ring */
  92         if (rte_event_ring_count(sr) != 0) {
  93                 printf("Error, ring not empty as expected\n");
  94                 goto error;
  95         }
  96         if (rte_event_ring_free_count(sr) != rte_event_ring_get_capacity(sr)) {
  97                 printf("Error, ring free count not as expected\n");
  98                 goto error;
  99         }
 100
 101         ret = rte_event_ring_enqueue_burst(sr, evs, RTE_DIM(evs), &free_count);
 102         if (ret != RTE_DIM(evs) ||
 103                         free_count != rte_event_ring_get_capacity(sr) - ret) {
 104                 printf("Error, status after enqueue is unexpected\n");
 105                 goto error;
 106         }
 107
 108         ret = rte_event_ring_enqueue_burst(sr, evs, RTE_DIM(evs), &free_count);
 109         if (ret != RTE_DIM(evs) - 1 ||
 110                         free_count != 0) {
 111                 printf("Error, status after enqueue is unexpected\n");
 112                 goto error;
 113         }
 114
 115         ret = rte_event_ring_dequeue_burst(sr, evs, RTE_DIM(evs), &used_count);
 116         if (ret != RTE_DIM(evs) ||
 117                         used_count != rte_event_ring_get_capacity(sr) - ret) {
 118                 printf("Error, status after enqueue is unexpected\n");
 119                 goto error;
 120         }
 121         ret = rte_event_ring_dequeue_burst(sr, evs, RTE_DIM(evs), &used_count);
 122         if (ret != RTE_DIM(evs) - 1 ||
 123                         used_count != 0) {
 124                 printf("Error, status after enqueue is unexpected\n");
 125                 goto error;
 126         }
 127
 128         rte_event_ring_free(sr);
 129         return 0;
 130 error:
 131         rte_event_ring_free(sr);
 132         return -1;
 133 }
 134
 135 static int
 136 test_event_ring_with_exact_size(void)
 137 {
 138         struct rte_event_ring *std_ring, *exact_sz_ring;
 139         struct rte_event ev = { .mbuf = NULL };
 140         struct rte_event ev_array[16];
 141         static const unsigned int ring_sz = RTE_DIM(ev_array);
 142         unsigned int i;
 143
 144         std_ring = rte_event_ring_create("std", ring_sz, rte_socket_id(),
 145                         RING_F_SP_ENQ | RING_F_SC_DEQ);
 146         if (std_ring == NULL) {
 147                 printf("%s: error, can't create std ring\n", __func__);
 148                 return -1;
 149         }
 150         exact_sz_ring = rte_event_ring_create("exact sz",
 151                         ring_sz, rte_socket_id(),
 152                         RING_F_SP_ENQ | RING_F_SC_DEQ | RING_F_EXACT_SZ);
 153         if (exact_sz_ring == NULL) {
 154                 printf("%s: error, can't create exact size ring\n", __func__);
 155                 return -1;
 156         }
 157
 158         /*
 159          * Check that the exact size ring is bigger than the standard ring
 160          */
 161         if (rte_event_ring_get_size(std_ring) >=
 162                         rte_event_ring_get_size(exact_sz_ring)) {
 163                 printf("%s: error, std ring (size: %u) is not smaller than exact size one (size %u)\n",
 164                                 __func__,
 165                                 rte_event_ring_get_size(std_ring),
 166                                 rte_event_ring_get_size(exact_sz_ring));
 167                 return -1;
 168         }
 169         /*
 170          * check that the exact_sz_ring can hold one more element than the
 171          * standard ring. (16 vs 15 elements)
 172          */
 173         for (i = 0; i < ring_sz - 1; i++) {
 174                 rte_event_ring_enqueue_burst(std_ring, &ev, 1, NULL);
 175                 rte_event_ring_enqueue_burst(exact_sz_ring, &ev, 1, NULL);
 176         }
 177         if (rte_event_ring_enqueue_burst(std_ring, &ev, 1, NULL) != 0) {
 178                 printf("%s: error, unexpected successful enqueue\n", __func__);
 179                 return -1;
 180         }
 181         if (rte_event_ring_enqueue_burst(exact_sz_ring, &ev, 1, NULL) != 1) {
 182                 printf("%s: error, enqueue failed\n", __func__);
 183                 return -1;
 184         }
 185
 186         /* check that dequeue returns the expected number of elements */
 187         if (rte_event_ring_dequeue_burst(exact_sz_ring, ev_array,
 188                         RTE_DIM(ev_array), NULL) != ring_sz) {
 189                 printf("%s: error, failed to dequeue expected nb of elements\n",
 190                                 __func__);
 191                 return -1;
 192         }
 193
 194         /* check that the capacity function returns expected value */
 195         if (rte_event_ring_get_capacity(exact_sz_ring) != ring_sz) {
 196                 printf("%s: error, incorrect ring capacity reported\n",
 197                                 __func__);
 198                 return -1;
 199         }
 200
 201         rte_event_ring_free(std_ring);
 202         rte_event_ring_free(exact_sz_ring);
 203         return 0;
 204 }
 205
 206 static int
 207 test_event_ring(void)
 208 {
 209         if (r == NULL)
 210                 r = rte_event_ring_create("ev_test", RING_SIZE,
 211                                 SOCKET_ID_ANY, 0);
 212         if (r == NULL)
 213                 return -1;
 214
 215         /* retrieve the ring from its name */
 216         if (rte_event_ring_lookup("ev_test") != r) {
 217                 printf("Cannot lookup ring from its name\n");
 218                 return -1;
 219         }
 220
 221         /* basic operations */
 222         if (test_create_count_odd() < 0) {
 223                 printf("Test failed to detect odd count\n");
 224                 return -1;
 225         }
 226         printf("Test detected odd count\n");
 227
 228         if (test_lookup_null() < 0) {
 229                 printf("Test failed to detect NULL ring lookup\n");
 230                 return -1;
 231         }
 232         printf("Test detected NULL ring lookup\n");
 233
 234         /* test of creating ring with wrong size */
 235         if (test_event_ring_creation_with_wrong_size() < 0)
 236                 return -1;
 237
 238         if (test_basic_event_enqueue_dequeue() < 0)
 239                 return -1;
 240
 241         if (test_event_ring_with_exact_size() < 0)
 242                 return -1;
 243
 244         return 0;
 245 }
 246
 247 REGISTER_TEST_COMMAND(event_ring_autotest, test_event_ring);