app/test-crypto-perf/cperf_test_latency.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2016-2017 Intel Corporation. All rights reserved.
   5  *
   6  *   Redistribution and use in source and binary forms, with or without
   7  *   modification, are permitted provided that the following conditions
   8  *   are met:
   9  *
  10  *     * Redistributions of source code must retain the above copyright
  11  *       notice, this list of conditions and the following disclaimer.
  12  *     * Redistributions in binary form must reproduce the above copyright
  13  *       notice, this list of conditions and the following disclaimer in
  14  *       the documentation and/or other materials provided with the
  15  *       distribution.
  16  *     * Neither the name of Intel Corporation nor the names of its
  17  *       contributors may be used to endorse or promote products derived
  18  *       from this software without specific prior written permission.
  19  *
  20  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  23  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  24  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  30  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include <rte_malloc.h>
  34 #include <rte_cycles.h>
  35 #include <rte_crypto.h>
  36 #include <rte_cryptodev.h>
  37
  38 #include "cperf_test_latency.h"
  39 #include "cperf_ops.h"
  40
  41
  42 struct cperf_op_result {
  43         uint64_t tsc_start;
  44         uint64_t tsc_end;
  45         enum rte_crypto_op_status status;
  46 };
  47
  48 struct cperf_latency_ctx {
  49         uint8_t dev_id;
  50         uint16_t qp_id;
  51         uint8_t lcore_id;
  52
  53         struct rte_mempool *pkt_mbuf_pool_in;
  54         struct rte_mempool *pkt_mbuf_pool_out;
  55         struct rte_mbuf **mbufs_in;
  56         struct rte_mbuf **mbufs_out;
  57
  58         struct rte_mempool *crypto_op_pool;
  59
  60         struct rte_cryptodev_sym_session *sess;
  61
  62         cperf_populate_ops_t populate_ops;
  63
  64         const struct cperf_options *options;
  65         const struct cperf_test_vector *test_vector;
  66         struct cperf_op_result *res;
  67 };
  68
  69 struct priv_op_data {
  70         struct cperf_op_result *result;
  71 };
  72
  73 #define max(a, b) (a > b ? (uint64_t)a : (uint64_t)b)
  74 #define min(a, b) (a < b ? (uint64_t)a : (uint64_t)b)
  75
  76 static void
  77 cperf_latency_test_free(struct cperf_latency_ctx *ctx, uint32_t mbuf_nb)
  78 {
  79         uint32_t i;
  80
  81         if (ctx) {
  82                 if (ctx->sess)
  83                         rte_cryptodev_sym_session_free(ctx->dev_id, ctx->sess);
  84
  85                 if (ctx->mbufs_in) {
  86                         for (i = 0; i < mbuf_nb; i++)
  87                                 rte_pktmbuf_free(ctx->mbufs_in[i]);
  88
  89                         rte_free(ctx->mbufs_in);
  90                 }
  91
  92                 if (ctx->mbufs_out) {
  93                         for (i = 0; i < mbuf_nb; i++) {
  94                                 if (ctx->mbufs_out[i] != NULL)
  95                                         rte_pktmbuf_free(ctx->mbufs_out[i]);
  96                         }
  97
  98                         rte_free(ctx->mbufs_out);
  99                 }
 100
 101                 if (ctx->pkt_mbuf_pool_in)
 102                         rte_mempool_free(ctx->pkt_mbuf_pool_in);
 103
 104                 if (ctx->pkt_mbuf_pool_out)
 105                         rte_mempool_free(ctx->pkt_mbuf_pool_out);
 106
 107                 if (ctx->crypto_op_pool)
 108                         rte_mempool_free(ctx->crypto_op_pool);
 109
 110                 rte_free(ctx->res);
 111                 rte_free(ctx);
 112         }
 113 }
 114
 115 static struct rte_mbuf *
 116 cperf_mbuf_create(struct rte_mempool *mempool,
 117                 uint32_t segments_nb,
 118                 const struct cperf_options *options,
 119                 const struct cperf_test_vector *test_vector)
 120 {
 121         struct rte_mbuf *mbuf;
 122         uint32_t segment_sz = options->max_buffer_size / segments_nb;
 123         uint32_t last_sz = options->max_buffer_size % segments_nb;
 124         uint8_t *mbuf_data;
 125         uint8_t *test_data =
 126                         (options->cipher_op == RTE_CRYPTO_CIPHER_OP_ENCRYPT) ?
 127                                         test_vector->plaintext.data :
 128                                         test_vector->ciphertext.data;
 129
 130         mbuf = rte_pktmbuf_alloc(mempool);
 131         if (mbuf == NULL)
 132                 goto error;
 133
 134         mbuf_data = (uint8_t *)rte_pktmbuf_append(mbuf, segment_sz);
 135         if (mbuf_data == NULL)
 136                 goto error;
 137
 138         memcpy(mbuf_data, test_data, segment_sz);
 139         test_data += segment_sz;
 140         segments_nb--;
 141
 142         while (segments_nb) {
 143                 struct rte_mbuf *m;
 144
 145                 m = rte_pktmbuf_alloc(mempool);
 146                 if (m == NULL)
 147                         goto error;
 148
 149                 rte_pktmbuf_chain(mbuf, m);
 150
 151                 mbuf_data = (uint8_t *)rte_pktmbuf_append(mbuf, segment_sz);
 152                 if (mbuf_data == NULL)
 153                         goto error;
 154
 155                 memcpy(mbuf_data, test_data, segment_sz);
 156                 test_data += segment_sz;
 157                 segments_nb--;
 158         }
 159
 160         if (last_sz) {
 161                 mbuf_data = (uint8_t *)rte_pktmbuf_append(mbuf, last_sz);
 162                 if (mbuf_data == NULL)
 163                         goto error;
 164
 165                 memcpy(mbuf_data, test_data, last_sz);
 166         }
 167
 168         if (options->op_type != CPERF_CIPHER_ONLY) {
 169                 mbuf_data = (uint8_t *)rte_pktmbuf_append(mbuf,
 170                         options->auth_digest_sz);
 171                 if (mbuf_data == NULL)
 172                         goto error;
 173         }
 174
 175         if (options->op_type == CPERF_AEAD) {
 176                 uint8_t *aead = (uint8_t *)rte_pktmbuf_prepend(mbuf,
 177                         RTE_ALIGN_CEIL(options->auth_aad_sz, 16));
 178
 179                 if (aead == NULL)
 180                         goto error;
 181
 182                 memcpy(aead, test_vector->aad.data, test_vector->aad.length);
 183         }
 184
 185         return mbuf;
 186 error:
 187         if (mbuf != NULL)
 188                 rte_pktmbuf_free(mbuf);
 189
 190         return NULL;
 191 }
 192
 193 void *
 194 cperf_latency_test_constructor(uint8_t dev_id, uint16_t qp_id,
 195                 const struct cperf_options *options,
 196                 const struct cperf_test_vector *test_vector,
 197                 const struct cperf_op_fns *op_fns)
 198 {
 199         struct cperf_latency_ctx *ctx = NULL;
 200         unsigned int mbuf_idx = 0;
 201         char pool_name[32] = "";
 202
 203         ctx = rte_malloc(NULL, sizeof(struct cperf_latency_ctx), 0);
 204         if (ctx == NULL)
 205                 goto err;
 206
 207         ctx->dev_id = dev_id;
 208         ctx->qp_id = qp_id;
 209
 210         ctx->populate_ops = op_fns->populate_ops;
 211         ctx->options = options;
 212         ctx->test_vector = test_vector;
 213
 214         /* IV goes at the end of the crypto operation */
 215         uint16_t iv_offset = sizeof(struct rte_crypto_op) +
 216                 sizeof(struct rte_crypto_sym_op) +
 217                 sizeof(struct cperf_op_result *);
 218
 219         ctx->sess = op_fns->sess_create(dev_id, options, test_vector, iv_offset);
 220         if (ctx->sess == NULL)
 221                 goto err;
 222
 223         snprintf(pool_name, sizeof(pool_name), "cperf_pool_in_cdev_%d",
 224                                 dev_id);
 225
 226         ctx->pkt_mbuf_pool_in = rte_pktmbuf_pool_create(pool_name,
 227                         options->pool_sz * options->segments_nb, 0, 0,
 228                         RTE_PKTMBUF_HEADROOM +
 229                         RTE_CACHE_LINE_ROUNDUP(
 230                                 (options->max_buffer_size / options->segments_nb) +
 231                                 (options->max_buffer_size % options->segments_nb) +
 232                                         options->auth_digest_sz),
 233                         rte_socket_id());
 234
 235         if (ctx->pkt_mbuf_pool_in == NULL)
 236                 goto err;
 237
 238         /* Generate mbufs_in with plaintext populated for test */
 239         ctx->mbufs_in = rte_malloc(NULL,
 240                         (sizeof(struct rte_mbuf *) *
 241                         ctx->options->pool_sz), 0);
 242
 243         for (mbuf_idx = 0; mbuf_idx < options->pool_sz; mbuf_idx++) {
 244                 ctx->mbufs_in[mbuf_idx] = cperf_mbuf_create(
 245                                 ctx->pkt_mbuf_pool_in, options->segments_nb,
 246                                 options, test_vector);
 247                 if (ctx->mbufs_in[mbuf_idx] == NULL)
 248                         goto err;
 249         }
 250
 251         if (options->out_of_place == 1) {
 252
 253                 snprintf(pool_name, sizeof(pool_name),
 254                                 "cperf_pool_out_cdev_%d",
 255                                 dev_id);
 256
 257                 ctx->pkt_mbuf_pool_out = rte_pktmbuf_pool_create(
 258                                 pool_name, options->pool_sz, 0, 0,
 259                                 RTE_PKTMBUF_HEADROOM +
 260                                 RTE_CACHE_LINE_ROUNDUP(
 261                                         options->max_buffer_size +
 262                                         options->auth_digest_sz),
 263                                 rte_socket_id());
 264
 265                 if (ctx->pkt_mbuf_pool_out == NULL)
 266                         goto err;
 267         }
 268
 269         ctx->mbufs_out = rte_malloc(NULL,
 270                         (sizeof(struct rte_mbuf *) *
 271                         ctx->options->pool_sz), 0);
 272
 273         for (mbuf_idx = 0; mbuf_idx < options->pool_sz; mbuf_idx++) {
 274                 if (options->out_of_place == 1) {
 275                         ctx->mbufs_out[mbuf_idx] = cperf_mbuf_create(
 276                                         ctx->pkt_mbuf_pool_out, 1,
 277                                         options, test_vector);
 278                         if (ctx->mbufs_out[mbuf_idx] == NULL)
 279                                 goto err;
 280                 } else {
 281                         ctx->mbufs_out[mbuf_idx] = NULL;
 282                 }
 283         }
 284
 285         snprintf(pool_name, sizeof(pool_name), "cperf_op_pool_cdev_%d",
 286                         dev_id);
 287
 288         uint16_t priv_size = sizeof(struct priv_op_data) + test_vector->iv.length;
 289         ctx->crypto_op_pool = rte_crypto_op_pool_create(pool_name,
 290                         RTE_CRYPTO_OP_TYPE_SYMMETRIC, options->pool_sz,
 291                         512, priv_size, rte_socket_id());
 292
 293         if (ctx->crypto_op_pool == NULL)
 294                 goto err;
 295
 296         ctx->res = rte_malloc(NULL, sizeof(struct cperf_op_result) *
 297                         ctx->options->total_ops, 0);
 298
 299         if (ctx->res == NULL)
 300                 goto err;
 301
 302         return ctx;
 303 err:
 304         cperf_latency_test_free(ctx, mbuf_idx);
 305
 306         return NULL;
 307 }
 308
 309 static inline void
 310 store_timestamp(struct rte_crypto_op *op, uint64_t timestamp)
 311 {
 312         struct priv_op_data *priv_data;
 313
 314         priv_data = (struct priv_op_data *) (op->sym + 1);
 315         priv_data->result->status = op->status;
 316         priv_data->result->tsc_end = timestamp;
 317 }
 318
 319 int
 320 cperf_latency_test_runner(void *arg)
 321 {
 322         struct cperf_latency_ctx *ctx = arg;
 323         uint16_t test_burst_size;
 324         uint8_t burst_size_idx = 0;
 325
 326         static int only_once;
 327
 328         if (ctx == NULL)
 329                 return 0;
 330
 331         struct rte_crypto_op *ops[ctx->options->max_burst_size];
 332         struct rte_crypto_op *ops_processed[ctx->options->max_burst_size];
 333         uint64_t i;
 334         struct priv_op_data *priv_data;
 335
 336         uint32_t lcore = rte_lcore_id();
 337
 338 #ifdef CPERF_LINEARIZATION_ENABLE
 339         struct rte_cryptodev_info dev_info;
 340         int linearize = 0;
 341
 342         /* Check if source mbufs require coalescing */
 343         if (ctx->options->segments_nb > 1) {
 344                 rte_cryptodev_info_get(ctx->dev_id, &dev_info);
 345                 if ((dev_info.feature_flags &
 346                                 RTE_CRYPTODEV_FF_MBUF_SCATTER_GATHER) == 0)
 347                         linearize = 1;
 348         }
 349 #endif /* CPERF_LINEARIZATION_ENABLE */
 350
 351         ctx->lcore_id = lcore;
 352
 353         /* Warm up the host CPU before starting the test */
 354         for (i = 0; i < ctx->options->total_ops; i++)
 355                 rte_cryptodev_enqueue_burst(ctx->dev_id, ctx->qp_id, NULL, 0);
 356
 357         /* Get first size from range or list */
 358         if (ctx->options->inc_burst_size != 0)
 359                 test_burst_size = ctx->options->min_burst_size;
 360         else
 361                 test_burst_size = ctx->options->burst_size_list[0];
 362
 363         uint16_t iv_offset = sizeof(struct rte_crypto_op) +
 364                 sizeof(struct rte_crypto_sym_op) +
 365                 sizeof(struct cperf_op_result *);
 366
 367         while (test_burst_size <= ctx->options->max_burst_size) {
 368                 uint64_t ops_enqd = 0, ops_deqd = 0;
 369                 uint64_t m_idx = 0, b_idx = 0;
 370
 371                 uint64_t tsc_val, tsc_end, tsc_start;
 372                 uint64_t tsc_max = 0, tsc_min = ~0UL, tsc_tot = 0, tsc_idx = 0;
 373                 uint64_t enqd_max = 0, enqd_min = ~0UL, enqd_tot = 0;
 374                 uint64_t deqd_max = 0, deqd_min = ~0UL, deqd_tot = 0;
 375
 376                 while (enqd_tot < ctx->options->total_ops) {
 377
 378                         uint16_t burst_size = ((enqd_tot + test_burst_size)
 379                                         <= ctx->options->total_ops) ?
 380                                                         test_burst_size :
 381                                                         ctx->options->total_ops -
 382                                                         enqd_tot;
 383
 384                         /* Allocate crypto ops from pool */
 385                         if (burst_size != rte_crypto_op_bulk_alloc(
 386                                         ctx->crypto_op_pool,
 387                                         RTE_CRYPTO_OP_TYPE_SYMMETRIC,
 388                                         ops, burst_size))
 389                                 return -1;
 390
 391                         /* Setup crypto op, attach mbuf etc */
 392                         (ctx->populate_ops)(ops, &ctx->mbufs_in[m_idx],
 393                                         &ctx->mbufs_out[m_idx],
 394                                         burst_size, ctx->sess, ctx->options,
 395                                         ctx->test_vector, iv_offset);
 396
 397                         tsc_start = rte_rdtsc_precise();
 398
 399 #ifdef CPERF_LINEARIZATION_ENABLE
 400                         if (linearize) {
 401                                 /* PMD doesn't support scatter-gather and source buffer
 402                                  * is segmented.
 403                                  * We need to linearize it before enqueuing.
 404                                  */
 405                                 for (i = 0; i < burst_size; i++)
 406                                         rte_pktmbuf_linearize(ops[i]->sym->m_src);
 407                         }
 408 #endif /* CPERF_LINEARIZATION_ENABLE */
 409
 410                         /* Enqueue burst of ops on crypto device */
 411                         ops_enqd = rte_cryptodev_enqueue_burst(ctx->dev_id, ctx->qp_id,
 412                                         ops, burst_size);
 413
 414                         /* Dequeue processed burst of ops from crypto device */
 415                         ops_deqd = rte_cryptodev_dequeue_burst(ctx->dev_id, ctx->qp_id,
 416                                         ops_processed, test_burst_size);
 417
 418                         tsc_end = rte_rdtsc_precise();
 419
 420                         /* Free memory for not enqueued operations */
 421                         if (ops_enqd != burst_size)
 422                                 rte_mempool_put_bulk(ctx->crypto_op_pool,
 423                                                 (void **)&ops_processed[ops_enqd],
 424                                                 burst_size - ops_enqd);
 425
 426                         for (i = 0; i < ops_enqd; i++) {
 427                                 ctx->res[tsc_idx].tsc_start = tsc_start;
 428                                 /*
 429                                  * Private data structure starts after the end of the
 430                                  * rte_crypto_sym_op structure.
 431                                  */
 432                                 priv_data = (struct priv_op_data *) (ops[i]->sym + 1);
 433                                 priv_data->result = (void *)&ctx->res[tsc_idx];
 434                                 tsc_idx++;
 435                         }
 436
 437                         if (likely(ops_deqd))  {
 438                                 /*
 439                                  * free crypto ops so they can be reused. We don't free
 440                                  * the mbufs here as we don't want to reuse them as
 441                                  * the crypto operation will change the data and cause
 442                                  * failures.
 443                                  */
 444                                 for (i = 0; i < ops_deqd; i++)
 445                                         store_timestamp(ops_processed[i], tsc_end);
 446
 447                                 rte_mempool_put_bulk(ctx->crypto_op_pool,
 448                                                 (void **)ops_processed, ops_deqd);
 449
 450                                 deqd_tot += ops_deqd;
 451                                 deqd_max = max(ops_deqd, deqd_max);
 452                                 deqd_min = min(ops_deqd, deqd_min);
 453                         }
 454
 455                         enqd_tot += ops_enqd;
 456                         enqd_max = max(ops_enqd, enqd_max);
 457                         enqd_min = min(ops_enqd, enqd_min);
 458
 459                         m_idx += ops_enqd;
 460                         m_idx = m_idx + test_burst_size > ctx->options->pool_sz ?
 461                                         0 : m_idx;
 462                         b_idx++;
 463                 }
 464
 465                 /* Dequeue any operations still in the crypto device */
 466                 while (deqd_tot < ctx->options->total_ops) {
 467                         /* Sending 0 length burst to flush sw crypto device */
 468                         rte_cryptodev_enqueue_burst(ctx->dev_id, ctx->qp_id, NULL, 0);
 469
 470                         /* dequeue burst */
 471                         ops_deqd = rte_cryptodev_dequeue_burst(ctx->dev_id, ctx->qp_id,
 472                                         ops_processed, test_burst_size);
 473
 474                         tsc_end = rte_rdtsc_precise();
 475
 476                         if (ops_deqd != 0) {
 477                                 for (i = 0; i < ops_deqd; i++)
 478                                         store_timestamp(ops_processed[i], tsc_end);
 479
 480                                 rte_mempool_put_bulk(ctx->crypto_op_pool,
 481                                                 (void **)ops_processed, ops_deqd);
 482
 483                                 deqd_tot += ops_deqd;
 484                                 deqd_max = max(ops_deqd, deqd_max);
 485                                 deqd_min = min(ops_deqd, deqd_min);
 486                         }
 487                 }
 488
 489                 for (i = 0; i < tsc_idx; i++) {
 490                         tsc_val = ctx->res[i].tsc_end - ctx->res[i].tsc_start;
 491                         tsc_max = max(tsc_val, tsc_max);
 492                         tsc_min = min(tsc_val, tsc_min);
 493                         tsc_tot += tsc_val;
 494                 }
 495
 496                 double time_tot, time_avg, time_max, time_min;
 497
 498                 const uint64_t tunit = 1000000; /* us */
 499                 const uint64_t tsc_hz = rte_get_tsc_hz();
 500
 501                 uint64_t enqd_avg = enqd_tot / b_idx;
 502                 uint64_t deqd_avg = deqd_tot / b_idx;
 503                 uint64_t tsc_avg = tsc_tot / tsc_idx;
 504
 505                 time_tot = tunit*(double)(tsc_tot) / tsc_hz;
 506                 time_avg = tunit*(double)(tsc_avg) / tsc_hz;
 507                 time_max = tunit*(double)(tsc_max) / tsc_hz;
 508                 time_min = tunit*(double)(tsc_min) / tsc_hz;
 509
 510                 if (ctx->options->csv) {
 511                         if (!only_once)
 512                                 printf("\n# lcore, Buffer Size, Burst Size, Pakt Seq #, "
 513                                                 "Packet Size, cycles, time (us)");
 514
 515                         for (i = 0; i < ctx->options->total_ops; i++) {
 516
 517                                 printf("\n%u;%u;%u;%"PRIu64";%"PRIu64";%.3f",
 518                                         ctx->lcore_id, ctx->options->test_buffer_size,
 519                                         test_burst_size, i + 1,
 520                                         ctx->res[i].tsc_end - ctx->res[i].tsc_start,
 521                                         tunit * (double) (ctx->res[i].tsc_end
 522                                                         - ctx->res[i].tsc_start)
 523                                                 / tsc_hz);
 524
 525                         }
 526                         only_once = 1;
 527                 } else {
 528                         printf("\n# Device %d on lcore %u\n", ctx->dev_id,
 529                                 ctx->lcore_id);
 530                         printf("\n# total operations: %u", ctx->options->total_ops);
 531                         printf("\n# Buffer size: %u", ctx->options->test_buffer_size);
 532                         printf("\n# Burst size: %u", test_burst_size);
 533                         printf("\n#     Number of bursts: %"PRIu64,
 534                                         b_idx);
 535
 536                         printf("\n#");
 537                         printf("\n#          \t       Total\t   Average\t   "
 538                                         "Maximum\t   Minimum");
 539                         printf("\n#  enqueued\t%12"PRIu64"\t%10"PRIu64"\t"
 540                                         "%10"PRIu64"\t%10"PRIu64, enqd_tot,
 541                                         enqd_avg, enqd_max, enqd_min);
 542                         printf("\n#  dequeued\t%12"PRIu64"\t%10"PRIu64"\t"
 543                                         "%10"PRIu64"\t%10"PRIu64, deqd_tot,
 544                                         deqd_avg, deqd_max, deqd_min);
 545                         printf("\n#    cycles\t%12"PRIu64"\t%10"PRIu64"\t"
 546                                         "%10"PRIu64"\t%10"PRIu64, tsc_tot,
 547                                         tsc_avg, tsc_max, tsc_min);
 548                         printf("\n# time [us]\t%12.0f\t%10.3f\t%10.3f\t%10.3f",
 549                                         time_tot, time_avg, time_max, time_min);
 550                         printf("\n\n");
 551
 552                 }
 553
 554                 /* Get next size from range or list */
 555                 if (ctx->options->inc_burst_size != 0)
 556                         test_burst_size += ctx->options->inc_burst_size;
 557                 else {
 558                         if (++burst_size_idx == ctx->options->burst_size_count)
 559                                 break;
 560                         test_burst_size =
 561                                 ctx->options->burst_size_list[burst_size_idx];
 562                 }
 563         }
 564
 565         return 0;
 566 }
 567
 568 void
 569 cperf_latency_test_destructor(void *arg)
 570 {
 571         struct cperf_latency_ctx *ctx = arg;
 572
 573         if (ctx == NULL)
 574                 return;
 575
 576         cperf_latency_test_free(ctx, ctx->options->pool_sz);
 577
 578 }