ceph/src/seastar/dpdk/app/test/test_mempool.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2014 Intel Corporation
   3  */
   4
   5 #include <string.h>
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8 #include <stdint.h>
   9 #include <inttypes.h>
  10 #include <stdarg.h>
  11 #include <errno.h>
  12 #include <sys/queue.h>
  13
  14 #include <rte_common.h>
  15 #include <rte_log.h>
  16 #include <rte_debug.h>
  17 #include <rte_memory.h>
  18 #include <rte_launch.h>
  19 #include <rte_cycles.h>
  20 #include <rte_eal.h>
  21 #include <rte_per_lcore.h>
  22 #include <rte_lcore.h>
  23 #include <rte_atomic.h>
  24 #include <rte_branch_prediction.h>
  25 #include <rte_mempool.h>
  26 #include <rte_spinlock.h>
  27 #include <rte_malloc.h>
  28 #include <rte_mbuf_pool_ops.h>
  29
  30 #include "test.h"
  31
  32 /*
  33  * Mempool
  34  * =======
  35  *
  36  * Basic tests: done on one core with and without cache:
  37  *
  38  *    - Get one object, put one object
  39  *    - Get two objects, put two objects
  40  *    - Get all objects, test that their content is not modified and
  41  *      put them back in the pool.
  42  */
  43
  44 #define MEMPOOL_ELT_SIZE 2048
  45 #define MAX_KEEP 16
  46 #define MEMPOOL_SIZE ((rte_lcore_count()*(MAX_KEEP+RTE_MEMPOOL_CACHE_MAX_SIZE))-1)
  47
  48 #define LOG_ERR() printf("test failed at %s():%d\n", __func__, __LINE__)
  49 #define RET_ERR() do {                                                  \
  50                 LOG_ERR();                                              \
  51                 return -1;                                              \
  52         } while (0)
  53 #define GOTO_ERR(var, label) do {                                       \
  54                 LOG_ERR();                                              \
  55                 var = -1;                                               \
  56                 goto label;                                             \
  57         } while (0)
  58
  59 static rte_atomic32_t synchro;
  60
  61 /*
  62  * save the object number in the first 4 bytes of object data. All
  63  * other bytes are set to 0.
  64  */
  65 static void
  66 my_obj_init(struct rte_mempool *mp, __attribute__((unused)) void *arg,
  67             void *obj, unsigned i)
  68 {
  69         uint32_t *objnum = obj;
  70
  71         memset(obj, 0, mp->elt_size);
  72         *objnum = i;
  73 }
  74
  75 /* basic tests (done on one core) */
  76 static int
  77 test_mempool_basic(struct rte_mempool *mp, int use_external_cache)
  78 {
  79         uint32_t *objnum;
  80         void **objtable;
  81         void *obj, *obj2;
  82         char *obj_data;
  83         int ret = 0;
  84         unsigned i, j;
  85         int offset;
  86         struct rte_mempool_cache *cache;
  87
  88         if (use_external_cache) {
  89                 /* Create a user-owned mempool cache. */
  90                 cache = rte_mempool_cache_create(RTE_MEMPOOL_CACHE_MAX_SIZE,
  91                                                  SOCKET_ID_ANY);
  92                 if (cache == NULL)
  93                         RET_ERR();
  94         } else {
  95                 /* May be NULL if cache is disabled. */
  96                 cache = rte_mempool_default_cache(mp, rte_lcore_id());
  97         }
  98
  99         /* dump the mempool status */
 100         rte_mempool_dump(stdout, mp);
 101
 102         printf("get an object\n");
 103         if (rte_mempool_generic_get(mp, &obj, 1, cache) < 0)
 104                 GOTO_ERR(ret, out);
 105         rte_mempool_dump(stdout, mp);
 106
 107         /* tests that improve coverage */
 108         printf("get object count\n");
 109         /* We have to count the extra caches, one in this case. */
 110         offset = use_external_cache ? 1 * cache->len : 0;
 111         if (rte_mempool_avail_count(mp) + offset != MEMPOOL_SIZE - 1)
 112                 GOTO_ERR(ret, out);
 113
 114         printf("get private data\n");
 115         if (rte_mempool_get_priv(mp) != (char *)mp +
 116                         MEMPOOL_HEADER_SIZE(mp, mp->cache_size))
 117                 GOTO_ERR(ret, out);
 118
 119 #ifndef RTE_EXEC_ENV_FREEBSD /* rte_mem_virt2iova() not supported on bsd */
 120         printf("get physical address of an object\n");
 121         if (rte_mempool_virt2iova(obj) != rte_mem_virt2iova(obj))
 122                 GOTO_ERR(ret, out);
 123 #endif
 124
 125         printf("put the object back\n");
 126         rte_mempool_generic_put(mp, &obj, 1, cache);
 127         rte_mempool_dump(stdout, mp);
 128
 129         printf("get 2 objects\n");
 130         if (rte_mempool_generic_get(mp, &obj, 1, cache) < 0)
 131                 GOTO_ERR(ret, out);
 132         if (rte_mempool_generic_get(mp, &obj2, 1, cache) < 0) {
 133                 rte_mempool_generic_put(mp, &obj, 1, cache);
 134                 GOTO_ERR(ret, out);
 135         }
 136         rte_mempool_dump(stdout, mp);
 137
 138         printf("put the objects back\n");
 139         rte_mempool_generic_put(mp, &obj, 1, cache);
 140         rte_mempool_generic_put(mp, &obj2, 1, cache);
 141         rte_mempool_dump(stdout, mp);
 142
 143         /*
 144          * get many objects: we cannot get them all because the cache
 145          * on other cores may not be empty.
 146          */
 147         objtable = malloc(MEMPOOL_SIZE * sizeof(void *));
 148         if (objtable == NULL)
 149                 GOTO_ERR(ret, out);
 150
 151         for (i = 0; i < MEMPOOL_SIZE; i++) {
 152                 if (rte_mempool_generic_get(mp, &objtable[i], 1, cache) < 0)
 153                         break;
 154         }
 155
 156         /*
 157          * for each object, check that its content was not modified,
 158          * and put objects back in pool
 159          */
 160         while (i--) {
 161                 obj = objtable[i];
 162                 obj_data = obj;
 163                 objnum = obj;
 164                 if (*objnum > MEMPOOL_SIZE) {
 165                         printf("bad object number(%d)\n", *objnum);
 166                         ret = -1;
 167                         break;
 168                 }
 169                 for (j = sizeof(*objnum); j < mp->elt_size; j++) {
 170                         if (obj_data[j] != 0)
 171                                 ret = -1;
 172                 }
 173
 174                 rte_mempool_generic_put(mp, &objtable[i], 1, cache);
 175         }
 176
 177         free(objtable);
 178         if (ret == -1)
 179                 printf("objects were modified!\n");
 180
 181 out:
 182         if (use_external_cache) {
 183                 rte_mempool_cache_flush(cache, mp);
 184                 rte_mempool_cache_free(cache);
 185         }
 186
 187         return ret;
 188 }
 189
 190 static int test_mempool_creation_with_exceeded_cache_size(void)
 191 {
 192         struct rte_mempool *mp_cov;
 193
 194         mp_cov = rte_mempool_create("test_mempool_cache_too_big",
 195                 MEMPOOL_SIZE,
 196                 MEMPOOL_ELT_SIZE,
 197                 RTE_MEMPOOL_CACHE_MAX_SIZE + 32, 0,
 198                 NULL, NULL,
 199                 my_obj_init, NULL,
 200                 SOCKET_ID_ANY, 0);
 201
 202         if (mp_cov != NULL) {
 203                 rte_mempool_free(mp_cov);
 204                 RET_ERR();
 205         }
 206
 207         return 0;
 208 }
 209
 210 static struct rte_mempool *mp_spsc;
 211 static rte_spinlock_t scsp_spinlock;
 212 static void *scsp_obj_table[MAX_KEEP];
 213
 214 /*
 215  * single producer function
 216  */
 217 static int test_mempool_single_producer(void)
 218 {
 219         unsigned int i;
 220         void *obj = NULL;
 221         uint64_t start_cycles, end_cycles;
 222         uint64_t duration = rte_get_timer_hz() / 4;
 223
 224         start_cycles = rte_get_timer_cycles();
 225         while (1) {
 226                 end_cycles = rte_get_timer_cycles();
 227                 /* duration uses up, stop producing */
 228                 if (start_cycles + duration < end_cycles)
 229                         break;
 230                 rte_spinlock_lock(&scsp_spinlock);
 231                 for (i = 0; i < MAX_KEEP; i ++) {
 232                         if (NULL != scsp_obj_table[i]) {
 233                                 obj = scsp_obj_table[i];
 234                                 break;
 235                         }
 236                 }
 237                 rte_spinlock_unlock(&scsp_spinlock);
 238                 if (i >= MAX_KEEP) {
 239                         continue;
 240                 }
 241                 if (rte_mempool_from_obj(obj) != mp_spsc) {
 242                         printf("obj not owned by this mempool\n");
 243                         RET_ERR();
 244                 }
 245                 rte_mempool_put(mp_spsc, obj);
 246                 rte_spinlock_lock(&scsp_spinlock);
 247                 scsp_obj_table[i] = NULL;
 248                 rte_spinlock_unlock(&scsp_spinlock);
 249         }
 250
 251         return 0;
 252 }
 253
 254 /*
 255  * single consumer function
 256  */
 257 static int test_mempool_single_consumer(void)
 258 {
 259         unsigned int i;
 260         void * obj;
 261         uint64_t start_cycles, end_cycles;
 262         uint64_t duration = rte_get_timer_hz() / 8;
 263
 264         start_cycles = rte_get_timer_cycles();
 265         while (1) {
 266                 end_cycles = rte_get_timer_cycles();
 267                 /* duration uses up, stop consuming */
 268                 if (start_cycles + duration < end_cycles)
 269                         break;
 270                 rte_spinlock_lock(&scsp_spinlock);
 271                 for (i = 0; i < MAX_KEEP; i ++) {
 272                         if (NULL == scsp_obj_table[i])
 273                                 break;
 274                 }
 275                 rte_spinlock_unlock(&scsp_spinlock);
 276                 if (i >= MAX_KEEP)
 277                         continue;
 278                 if (rte_mempool_get(mp_spsc, &obj) < 0)
 279                         break;
 280                 rte_spinlock_lock(&scsp_spinlock);
 281                 scsp_obj_table[i] = obj;
 282                 rte_spinlock_unlock(&scsp_spinlock);
 283         }
 284
 285         return 0;
 286 }
 287
 288 /*
 289  * test function for mempool test based on singple consumer and single producer,
 290  * can run on one lcore only
 291  */
 292 static int
 293 test_mempool_launch_single_consumer(__attribute__((unused)) void *arg)
 294 {
 295         return test_mempool_single_consumer();
 296 }
 297
 298 static void
 299 my_mp_init(struct rte_mempool *mp, __attribute__((unused)) void *arg)
 300 {
 301         printf("mempool name is %s\n", mp->name);
 302         /* nothing to be implemented here*/
 303         return ;
 304 }
 305
 306 /*
 307  * it tests the mempool operations based on singple producer and single consumer
 308  */
 309 static int
 310 test_mempool_sp_sc(void)
 311 {
 312         int ret = 0;
 313         unsigned lcore_id = rte_lcore_id();
 314         unsigned lcore_next;
 315
 316         /* create a mempool with single producer/consumer ring */
 317         if (mp_spsc == NULL) {
 318                 mp_spsc = rte_mempool_create("test_mempool_sp_sc", MEMPOOL_SIZE,
 319                         MEMPOOL_ELT_SIZE, 0, 0,
 320                         my_mp_init, NULL,
 321                         my_obj_init, NULL,
 322                         SOCKET_ID_ANY,
 323                         MEMPOOL_F_NO_CACHE_ALIGN | MEMPOOL_F_SP_PUT |
 324                         MEMPOOL_F_SC_GET);
 325                 if (mp_spsc == NULL)
 326                         RET_ERR();
 327         }
 328         if (rte_mempool_lookup("test_mempool_sp_sc") != mp_spsc) {
 329                 printf("Cannot lookup mempool from its name\n");
 330                 ret = -1;
 331                 goto err;
 332         }
 333         lcore_next = rte_get_next_lcore(lcore_id, 0, 1);
 334         if (lcore_next >= RTE_MAX_LCORE) {
 335                 ret = -1;
 336                 goto err;
 337         }
 338         if (rte_eal_lcore_role(lcore_next) != ROLE_RTE) {
 339                 ret = -1;
 340                 goto err;
 341         }
 342         rte_spinlock_init(&scsp_spinlock);
 343         memset(scsp_obj_table, 0, sizeof(scsp_obj_table));
 344         rte_eal_remote_launch(test_mempool_launch_single_consumer, NULL,
 345                 lcore_next);
 346         if (test_mempool_single_producer() < 0)
 347                 ret = -1;
 348
 349         if (rte_eal_wait_lcore(lcore_next) < 0)
 350                 ret = -1;
 351
 352 err:
 353         rte_mempool_free(mp_spsc);
 354         mp_spsc = NULL;
 355
 356         return ret;
 357 }
 358
 359 /*
 360  * it tests some more basic of mempool
 361  */
 362 static int
 363 test_mempool_basic_ex(struct rte_mempool *mp)
 364 {
 365         unsigned i;
 366         void **obj;
 367         void *err_obj;
 368         int ret = -1;
 369
 370         if (mp == NULL)
 371                 return ret;
 372
 373         obj = rte_calloc("test_mempool_basic_ex", MEMPOOL_SIZE,
 374                 sizeof(void *), 0);
 375         if (obj == NULL) {
 376                 printf("test_mempool_basic_ex fail to rte_malloc\n");
 377                 return ret;
 378         }
 379         printf("test_mempool_basic_ex now mempool (%s) has %u free entries\n",
 380                 mp->name, rte_mempool_in_use_count(mp));
 381         if (rte_mempool_full(mp) != 1) {
 382                 printf("test_mempool_basic_ex the mempool should be full\n");
 383                 goto fail_mp_basic_ex;
 384         }
 385
 386         for (i = 0; i < MEMPOOL_SIZE; i ++) {
 387                 if (rte_mempool_get(mp, &obj[i]) < 0) {
 388                         printf("test_mp_basic_ex fail to get object for [%u]\n",
 389                                 i);
 390                         goto fail_mp_basic_ex;
 391                 }
 392         }
 393         if (rte_mempool_get(mp, &err_obj) == 0) {
 394                 printf("test_mempool_basic_ex get an impossible obj\n");
 395                 goto fail_mp_basic_ex;
 396         }
 397         printf("number: %u\n", i);
 398         if (rte_mempool_empty(mp) != 1) {
 399                 printf("test_mempool_basic_ex the mempool should be empty\n");
 400                 goto fail_mp_basic_ex;
 401         }
 402
 403         for (i = 0; i < MEMPOOL_SIZE; i++)
 404                 rte_mempool_put(mp, obj[i]);
 405
 406         if (rte_mempool_full(mp) != 1) {
 407                 printf("test_mempool_basic_ex the mempool should be full\n");
 408                 goto fail_mp_basic_ex;
 409         }
 410
 411         ret = 0;
 412
 413 fail_mp_basic_ex:
 414         if (obj != NULL)
 415                 rte_free((void *)obj);
 416
 417         return ret;
 418 }
 419
 420 static int
 421 test_mempool_same_name_twice_creation(void)
 422 {
 423         struct rte_mempool *mp_tc, *mp_tc2;
 424
 425         mp_tc = rte_mempool_create("test_mempool_same_name", MEMPOOL_SIZE,
 426                 MEMPOOL_ELT_SIZE, 0, 0,
 427                 NULL, NULL,
 428                 NULL, NULL,
 429                 SOCKET_ID_ANY, 0);
 430
 431         if (mp_tc == NULL)
 432                 RET_ERR();
 433
 434         mp_tc2 = rte_mempool_create("test_mempool_same_name", MEMPOOL_SIZE,
 435                 MEMPOOL_ELT_SIZE, 0, 0,
 436                 NULL, NULL,
 437                 NULL, NULL,
 438                 SOCKET_ID_ANY, 0);
 439
 440         if (mp_tc2 != NULL) {
 441                 rte_mempool_free(mp_tc);
 442                 rte_mempool_free(mp_tc2);
 443                 RET_ERR();
 444         }
 445
 446         rte_mempool_free(mp_tc);
 447         return 0;
 448 }
 449
 450 static void
 451 walk_cb(struct rte_mempool *mp, void *userdata __rte_unused)
 452 {
 453         printf("\t%s\n", mp->name);
 454 }
 455
 456 static int
 457 test_mempool(void)
 458 {
 459         int ret = -1;
 460         struct rte_mempool *mp_cache = NULL;
 461         struct rte_mempool *mp_nocache = NULL;
 462         struct rte_mempool *mp_stack = NULL;
 463         struct rte_mempool *default_pool = NULL;
 464         const char *default_pool_ops = rte_mbuf_best_mempool_ops();
 465
 466         rte_atomic32_init(&synchro);
 467
 468         /* create a mempool (without cache) */
 469         mp_nocache = rte_mempool_create("test_nocache", MEMPOOL_SIZE,
 470                 MEMPOOL_ELT_SIZE, 0, 0,
 471                 NULL, NULL,
 472                 my_obj_init, NULL,
 473                 SOCKET_ID_ANY, 0);
 474
 475         if (mp_nocache == NULL) {
 476                 printf("cannot allocate mp_nocache mempool\n");
 477                 goto err;
 478         }
 479
 480         /* create a mempool (with cache) */
 481         mp_cache = rte_mempool_create("test_cache", MEMPOOL_SIZE,
 482                 MEMPOOL_ELT_SIZE,
 483                 RTE_MEMPOOL_CACHE_MAX_SIZE, 0,
 484                 NULL, NULL,
 485                 my_obj_init, NULL,
 486                 SOCKET_ID_ANY, 0);
 487
 488         if (mp_cache == NULL) {
 489                 printf("cannot allocate mp_cache mempool\n");
 490                 goto err;
 491         }
 492
 493         /* create a mempool with an external handler */
 494         mp_stack = rte_mempool_create_empty("test_stack",
 495                 MEMPOOL_SIZE,
 496                 MEMPOOL_ELT_SIZE,
 497                 RTE_MEMPOOL_CACHE_MAX_SIZE, 0,
 498                 SOCKET_ID_ANY, 0);
 499
 500         if (mp_stack == NULL) {
 501                 printf("cannot allocate mp_stack mempool\n");
 502                 goto err;
 503         }
 504         if (rte_mempool_set_ops_byname(mp_stack, "stack", NULL) < 0) {
 505                 printf("cannot set stack handler\n");
 506                 goto err;
 507         }
 508         if (rte_mempool_populate_default(mp_stack) < 0) {
 509                 printf("cannot populate mp_stack mempool\n");
 510                 goto err;
 511         }
 512         rte_mempool_obj_iter(mp_stack, my_obj_init, NULL);
 513
 514         /* Create a mempool based on Default handler */
 515         printf("Testing %s mempool handler\n", default_pool_ops);
 516         default_pool = rte_mempool_create_empty("default_pool",
 517                                                 MEMPOOL_SIZE,
 518                                                 MEMPOOL_ELT_SIZE,
 519                                                 RTE_MEMPOOL_CACHE_MAX_SIZE, 0,
 520                                                 SOCKET_ID_ANY, 0);
 521
 522         if (default_pool == NULL) {
 523                 printf("cannot allocate default mempool\n");
 524                 goto err;
 525         }
 526         if (rte_mempool_set_ops_byname(default_pool,
 527                                 default_pool_ops, NULL) < 0) {
 528                 printf("cannot set %s handler\n", default_pool_ops);
 529                 goto err;
 530         }
 531         if (rte_mempool_populate_default(default_pool) < 0) {
 532                 printf("cannot populate %s mempool\n", default_pool_ops);
 533                 goto err;
 534         }
 535         rte_mempool_obj_iter(default_pool, my_obj_init, NULL);
 536
 537         /* retrieve the mempool from its name */
 538         if (rte_mempool_lookup("test_nocache") != mp_nocache) {
 539                 printf("Cannot lookup mempool from its name\n");
 540                 goto err;
 541         }
 542
 543         printf("Walk into mempools:\n");
 544         rte_mempool_walk(walk_cb, NULL);
 545
 546         rte_mempool_list_dump(stdout);
 547
 548         /* basic tests without cache */
 549         if (test_mempool_basic(mp_nocache, 0) < 0)
 550                 goto err;
 551
 552         /* basic tests with cache */
 553         if (test_mempool_basic(mp_cache, 0) < 0)
 554                 goto err;
 555
 556         /* basic tests with user-owned cache */
 557         if (test_mempool_basic(mp_nocache, 1) < 0)
 558                 goto err;
 559
 560         /* more basic tests without cache */
 561         if (test_mempool_basic_ex(mp_nocache) < 0)
 562                 goto err;
 563
 564         /* mempool operation test based on single producer and single comsumer */
 565         if (test_mempool_sp_sc() < 0)
 566                 goto err;
 567
 568         if (test_mempool_creation_with_exceeded_cache_size() < 0)
 569                 goto err;
 570
 571         if (test_mempool_same_name_twice_creation() < 0)
 572                 goto err;
 573
 574         /* test the stack handler */
 575         if (test_mempool_basic(mp_stack, 1) < 0)
 576                 goto err;
 577
 578         if (test_mempool_basic(default_pool, 1) < 0)
 579                 goto err;
 580
 581         rte_mempool_list_dump(stdout);
 582
 583         ret = 0;
 584
 585 err:
 586         rte_mempool_free(mp_nocache);
 587         rte_mempool_free(mp_cache);
 588         rte_mempool_free(mp_stack);
 589         rte_mempool_free(default_pool);
 590
 591         return ret;
 592 }
 593
 594 REGISTER_TEST_COMMAND(mempool_autotest, test_mempool);