lib/librte_eal/common/rte_service.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2017 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <stdio.h>
  35 #include <unistd.h>
  36 #include <inttypes.h>
  37 #include <limits.h>
  38 #include <string.h>
  39 #include <dirent.h>
  40
  41 #include <rte_service.h>
  42 #include "include/rte_service_component.h"
  43
  44 #include <rte_eal.h>
  45 #include <rte_lcore.h>
  46 #include <rte_common.h>
  47 #include <rte_debug.h>
  48 #include <rte_cycles.h>
  49 #include <rte_atomic.h>
  50 #include <rte_memory.h>
  51 #include <rte_malloc.h>
  52
  53 #define RTE_SERVICE_NUM_MAX 64
  54
  55 #define SERVICE_F_REGISTERED    (1 << 0)
  56 #define SERVICE_F_STATS_ENABLED (1 << 1)
  57
  58 /* runstates for services and lcores, denoting if they are active or not */
  59 #define RUNSTATE_STOPPED 0
  60 #define RUNSTATE_RUNNING 1
  61
  62 /* internal representation of a service */
  63 struct rte_service_spec_impl {
  64         /* public part of the struct */
  65         struct rte_service_spec spec;
  66
  67         /* atomic lock that when set indicates a service core is currently
  68          * running this service callback. When not set, a core may take the
  69          * lock and then run the service callback.
  70          */
  71         rte_atomic32_t execute_lock;
  72
  73         /* API set/get-able variables */
  74         int8_t app_runstate;
  75         int8_t comp_runstate;
  76         uint8_t internal_flags;
  77
  78         /* per service statistics */
  79         uint32_t num_mapped_cores;
  80         uint64_t calls;
  81         uint64_t cycles_spent;
  82 } __rte_cache_aligned;
  83
  84 /* the internal values of a service core */
  85 struct core_state {
  86         /* map of services IDs are run on this core */
  87         uint64_t service_mask;
  88         uint8_t runstate; /* running or stopped */
  89         uint8_t is_service_core; /* set if core is currently a service core */
  90
  91         /* extreme statistics */
  92         uint64_t calls_per_service[RTE_SERVICE_NUM_MAX];
  93 } __rte_cache_aligned;
  94
  95 static uint32_t rte_service_count;
  96 static struct rte_service_spec_impl *rte_services;
  97 static struct core_state *lcore_states;
  98 static uint32_t rte_service_library_initialized;
  99
 100 int32_t rte_service_init(void)
 101 {
 102         if (rte_service_library_initialized) {
 103                 printf("service library init() called, init flag %d\n",
 104                         rte_service_library_initialized);
 105                 return -EALREADY;
 106         }
 107
 108         rte_services = rte_calloc("rte_services", RTE_SERVICE_NUM_MAX,
 109                         sizeof(struct rte_service_spec_impl),
 110                         RTE_CACHE_LINE_SIZE);
 111         if (!rte_services) {
 112                 printf("error allocating rte services array\n");
 113                 return -ENOMEM;
 114         }
 115
 116         lcore_states = rte_calloc("rte_service_core_states", RTE_MAX_LCORE,
 117                         sizeof(struct core_state), RTE_CACHE_LINE_SIZE);
 118         if (!lcore_states) {
 119                 printf("error allocating core states array\n");
 120                 return -ENOMEM;
 121         }
 122
 123         int i;
 124         int count = 0;
 125         struct rte_config *cfg = rte_eal_get_configuration();
 126         for (i = 0; i < RTE_MAX_LCORE; i++) {
 127                 if (lcore_config[i].core_role == ROLE_SERVICE) {
 128                         if ((unsigned int)i == cfg->master_lcore)
 129                                 continue;
 130                         rte_service_lcore_add(i);
 131                         count++;
 132                 }
 133         }
 134
 135         rte_service_library_initialized = 1;
 136         return 0;
 137 }
 138
 139 /* returns 1 if service is registered and has not been unregistered
 140  * Returns 0 if service never registered, or has been unregistered
 141  */
 142 static inline int
 143 service_valid(uint32_t id)
 144 {
 145         return !!(rte_services[id].internal_flags & SERVICE_F_REGISTERED);
 146 }
 147
 148 /* validate ID and retrieve service pointer, or return error value */
 149 #define SERVICE_VALID_GET_OR_ERR_RET(id, service, retval) do {          \
 150         if (id >= RTE_SERVICE_NUM_MAX || !service_valid(id))            \
 151                 return retval;                                          \
 152         service = &rte_services[id];                                    \
 153 } while (0)
 154
 155 /* returns 1 if statistics should be colleced for service
 156  * Returns 0 if statistics should not be collected for service
 157  */
 158 static inline int
 159 service_stats_enabled(struct rte_service_spec_impl *impl)
 160 {
 161         return !!(impl->internal_flags & SERVICE_F_STATS_ENABLED);
 162 }
 163
 164 static inline int
 165 service_mt_safe(struct rte_service_spec_impl *s)
 166 {
 167         return !!(s->spec.capabilities & RTE_SERVICE_CAP_MT_SAFE);
 168 }
 169
 170 int32_t rte_service_set_stats_enable(uint32_t id, int32_t enabled)
 171 {
 172         struct rte_service_spec_impl *s;
 173         SERVICE_VALID_GET_OR_ERR_RET(id, s, 0);
 174
 175         if (enabled)
 176                 s->internal_flags |= SERVICE_F_STATS_ENABLED;
 177         else
 178                 s->internal_flags &= ~(SERVICE_F_STATS_ENABLED);
 179
 180         return 0;
 181 }
 182
 183 uint32_t
 184 rte_service_get_count(void)
 185 {
 186         return rte_service_count;
 187 }
 188
 189 int32_t rte_service_get_by_name(const char *name, uint32_t *service_id)
 190 {
 191         if (!service_id)
 192                 return -EINVAL;
 193
 194         int i;
 195         for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
 196                 if (service_valid(i) &&
 197                                 strcmp(name, rte_services[i].spec.name) == 0) {
 198                         *service_id = i;
 199                         return 0;
 200                 }
 201         }
 202
 203         return -ENODEV;
 204 }
 205
 206 const char *
 207 rte_service_get_name(uint32_t id)
 208 {
 209         struct rte_service_spec_impl *s;
 210         SERVICE_VALID_GET_OR_ERR_RET(id, s, 0);
 211         return s->spec.name;
 212 }
 213
 214 int32_t
 215 rte_service_probe_capability(uint32_t id, uint32_t capability)
 216 {
 217         struct rte_service_spec_impl *s;
 218         SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 219         return !!(s->spec.capabilities & capability);
 220 }
 221
 222 int32_t
 223 rte_service_component_register(const struct rte_service_spec *spec,
 224                                uint32_t *id_ptr)
 225 {
 226         uint32_t i;
 227         int32_t free_slot = -1;
 228
 229         if (spec->callback == NULL || strlen(spec->name) == 0)
 230                 return -EINVAL;
 231
 232         for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
 233                 if (!service_valid(i)) {
 234                         free_slot = i;
 235                         break;
 236                 }
 237         }
 238
 239         if ((free_slot < 0) || (i == RTE_SERVICE_NUM_MAX))
 240                 return -ENOSPC;
 241
 242         struct rte_service_spec_impl *s = &rte_services[free_slot];
 243         s->spec = *spec;
 244         s->internal_flags |= SERVICE_F_REGISTERED;
 245
 246         rte_smp_wmb();
 247         rte_service_count++;
 248
 249         if (id_ptr)
 250                 *id_ptr = free_slot;
 251
 252         return 0;
 253 }
 254
 255 int32_t
 256 rte_service_component_unregister(uint32_t id)
 257 {
 258         uint32_t i;
 259         struct rte_service_spec_impl *s;
 260         SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 261
 262         rte_service_count--;
 263         rte_smp_wmb();
 264
 265         s->internal_flags &= ~(SERVICE_F_REGISTERED);
 266
 267         /* clear the run-bit in all cores */
 268         for (i = 0; i < RTE_MAX_LCORE; i++)
 269                 lcore_states[i].service_mask &= ~(UINT64_C(1) << id);
 270
 271         memset(&rte_services[id], 0, sizeof(struct rte_service_spec_impl));
 272
 273         return 0;
 274 }
 275
 276 int32_t
 277 rte_service_component_runstate_set(uint32_t id, uint32_t runstate)
 278 {
 279         struct rte_service_spec_impl *s;
 280         SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 281
 282         if (runstate)
 283                 s->comp_runstate = RUNSTATE_RUNNING;
 284         else
 285                 s->comp_runstate = RUNSTATE_STOPPED;
 286
 287         rte_smp_wmb();
 288         return 0;
 289 }
 290
 291 int32_t
 292 rte_service_runstate_set(uint32_t id, uint32_t runstate)
 293 {
 294         struct rte_service_spec_impl *s;
 295         SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 296
 297         if (runstate)
 298                 s->app_runstate = RUNSTATE_RUNNING;
 299         else
 300                 s->app_runstate = RUNSTATE_STOPPED;
 301
 302         rte_smp_wmb();
 303         return 0;
 304 }
 305
 306 int32_t
 307 rte_service_runstate_get(uint32_t id)
 308 {
 309         struct rte_service_spec_impl *s;
 310         SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 311         rte_smp_rmb();
 312         return (s->app_runstate == RUNSTATE_RUNNING) &&
 313                 (s->comp_runstate == RUNSTATE_RUNNING) &&
 314                 (s->num_mapped_cores > 0);
 315 }
 316
 317 static inline void
 318 rte_service_runner_do_callback(struct rte_service_spec_impl *s,
 319                                struct core_state *cs, uint32_t service_idx)
 320 {
 321         void *userdata = s->spec.callback_userdata;
 322
 323         if (service_stats_enabled(s)) {
 324                 uint64_t start = rte_rdtsc();
 325                 s->spec.callback(userdata);
 326                 uint64_t end = rte_rdtsc();
 327                 s->cycles_spent += end - start;
 328                 cs->calls_per_service[service_idx]++;
 329                 s->calls++;
 330         } else
 331                 s->spec.callback(userdata);
 332 }
 333
 334
 335 static inline int32_t
 336 service_run(uint32_t i, struct core_state *cs, uint64_t service_mask)
 337 {
 338         if (!service_valid(i))
 339                 return -EINVAL;
 340         struct rte_service_spec_impl *s = &rte_services[i];
 341         if (s->comp_runstate != RUNSTATE_RUNNING ||
 342                         s->app_runstate != RUNSTATE_RUNNING ||
 343                         !(service_mask & (UINT64_C(1) << i)))
 344                 return -ENOEXEC;
 345
 346         /* check do we need cmpset, if MT safe or <= 1 core
 347          * mapped, atomic ops are not required.
 348          */
 349         const int use_atomics = (service_mt_safe(s) == 0) &&
 350                                 (s->num_mapped_cores > 1);
 351         if (use_atomics) {
 352                 if (!rte_atomic32_cmpset((uint32_t *)&s->execute_lock, 0, 1))
 353                         return -EBUSY;
 354
 355                 rte_service_runner_do_callback(s, cs, i);
 356                 rte_atomic32_clear(&s->execute_lock);
 357         } else
 358                 rte_service_runner_do_callback(s, cs, i);
 359
 360         return 0;
 361 }
 362
 363 int32_t rte_service_run_iter_on_app_lcore(uint32_t id)
 364 {
 365         /* run service on calling core, using all-ones as the service mask */
 366         struct core_state *cs = &lcore_states[rte_lcore_id()];
 367         return service_run(id, cs, UINT64_MAX);
 368 }
 369
 370 static int32_t
 371 rte_service_runner_func(void *arg)
 372 {
 373         RTE_SET_USED(arg);
 374         uint32_t i;
 375         const int lcore = rte_lcore_id();
 376         struct core_state *cs = &lcore_states[lcore];
 377
 378         while (lcore_states[lcore].runstate == RUNSTATE_RUNNING) {
 379                 const uint64_t service_mask = cs->service_mask;
 380
 381                 for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
 382                         /* return value ignored as no change to code flow */
 383                         service_run(i, cs, service_mask);
 384                 }
 385
 386                 rte_smp_rmb();
 387         }
 388
 389         lcore_config[lcore].state = WAIT;
 390
 391         return 0;
 392 }
 393
 394 int32_t
 395 rte_service_lcore_count(void)
 396 {
 397         int32_t count = 0;
 398         uint32_t i;
 399         for (i = 0; i < RTE_MAX_LCORE; i++)
 400                 count += lcore_states[i].is_service_core;
 401         return count;
 402 }
 403
 404 int32_t
 405 rte_service_lcore_list(uint32_t array[], uint32_t n)
 406 {
 407         uint32_t count = rte_service_lcore_count();
 408         if (count > n)
 409                 return -ENOMEM;
 410
 411         if (!array)
 412                 return -EINVAL;
 413
 414         uint32_t i;
 415         uint32_t idx = 0;
 416         for (i = 0; i < RTE_MAX_LCORE; i++) {
 417                 struct core_state *cs = &lcore_states[i];
 418                 if (cs->is_service_core) {
 419                         array[idx] = i;
 420                         idx++;
 421                 }
 422         }
 423
 424         return count;
 425 }
 426
 427 int32_t
 428 rte_service_lcore_count_services(uint32_t lcore)
 429 {
 430         if (lcore >= RTE_MAX_LCORE)
 431                 return -EINVAL;
 432
 433         struct core_state *cs = &lcore_states[lcore];
 434         if (!cs->is_service_core)
 435                 return -ENOTSUP;
 436
 437         return __builtin_popcountll(cs->service_mask);
 438 }
 439
 440 int32_t
 441 rte_service_start_with_defaults(void)
 442 {
 443         /* create a default mapping from cores to services, then start the
 444          * services to make them transparent to unaware applications.
 445          */
 446         uint32_t i;
 447         int ret;
 448         uint32_t count = rte_service_get_count();
 449
 450         int32_t lcore_iter = 0;
 451         uint32_t ids[RTE_MAX_LCORE] = {0};
 452         int32_t lcore_count = rte_service_lcore_list(ids, RTE_MAX_LCORE);
 453
 454         if (lcore_count == 0)
 455                 return -ENOTSUP;
 456
 457         for (i = 0; (int)i < lcore_count; i++)
 458                 rte_service_lcore_start(ids[i]);
 459
 460         for (i = 0; i < count; i++) {
 461                 /* do 1:1 core mapping here, with each service getting
 462                  * assigned a single core by default. Adding multiple services
 463                  * should multiplex to a single core, or 1:1 if there are the
 464                  * same amount of services as service-cores
 465                  */
 466                 ret = rte_service_map_lcore_set(i, ids[lcore_iter], 1);
 467                 if (ret)
 468                         return -ENODEV;
 469
 470                 lcore_iter++;
 471                 if (lcore_iter >= lcore_count)
 472                         lcore_iter = 0;
 473
 474                 ret = rte_service_runstate_set(i, 1);
 475                 if (ret)
 476                         return -ENOEXEC;
 477         }
 478
 479         return 0;
 480 }
 481
 482 static int32_t
 483 service_update(struct rte_service_spec *service, uint32_t lcore,
 484                 uint32_t *set, uint32_t *enabled)
 485 {
 486         uint32_t i;
 487         int32_t sid = -1;
 488
 489         for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
 490                 if ((struct rte_service_spec *)&rte_services[i] == service &&
 491                                 service_valid(i)) {
 492                         sid = i;
 493                         break;
 494                 }
 495         }
 496
 497         if (sid == -1 || lcore >= RTE_MAX_LCORE)
 498                 return -EINVAL;
 499
 500         if (!lcore_states[lcore].is_service_core)
 501                 return -EINVAL;
 502
 503         uint64_t sid_mask = UINT64_C(1) << sid;
 504         if (set) {
 505                 if (*set) {
 506                         lcore_states[lcore].service_mask |= sid_mask;
 507                         rte_services[sid].num_mapped_cores++;
 508                 } else {
 509                         lcore_states[lcore].service_mask &= ~(sid_mask);
 510                         rte_services[sid].num_mapped_cores--;
 511                 }
 512         }
 513
 514         if (enabled)
 515                 *enabled = !!(lcore_states[lcore].service_mask & (sid_mask));
 516
 517         rte_smp_wmb();
 518
 519         return 0;
 520 }
 521
 522 int32_t
 523 rte_service_map_lcore_set(uint32_t id, uint32_t lcore, uint32_t enabled)
 524 {
 525         struct rte_service_spec_impl *s;
 526         SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 527         uint32_t on = enabled > 0;
 528         return service_update(&s->spec, lcore, &on, 0);
 529 }
 530
 531 int32_t
 532 rte_service_map_lcore_get(uint32_t id, uint32_t lcore)
 533 {
 534         struct rte_service_spec_impl *s;
 535         SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 536         uint32_t enabled;
 537         int ret = service_update(&s->spec, lcore, 0, &enabled);
 538         if (ret == 0)
 539                 return enabled;
 540         return ret;
 541 }
 542
 543 int32_t rte_service_lcore_reset_all(void)
 544 {
 545         /* loop over cores, reset all to mask 0 */
 546         uint32_t i;
 547         for (i = 0; i < RTE_MAX_LCORE; i++) {
 548                 lcore_states[i].service_mask = 0;
 549                 lcore_states[i].is_service_core = 0;
 550                 lcore_states[i].runstate = RUNSTATE_STOPPED;
 551         }
 552         for (i = 0; i < RTE_SERVICE_NUM_MAX; i++)
 553                 rte_services[i].num_mapped_cores = 0;
 554
 555         rte_smp_wmb();
 556
 557         return 0;
 558 }
 559
 560 static void
 561 set_lcore_state(uint32_t lcore, int32_t state)
 562 {
 563         /* mark core state in hugepage backed config */
 564         struct rte_config *cfg = rte_eal_get_configuration();
 565         cfg->lcore_role[lcore] = state;
 566
 567         /* mark state in process local lcore_config */
 568         lcore_config[lcore].core_role = state;
 569
 570         /* update per-lcore optimized state tracking */
 571         lcore_states[lcore].is_service_core = (state == ROLE_SERVICE);
 572 }
 573
 574 int32_t
 575 rte_service_lcore_add(uint32_t lcore)
 576 {
 577         if (lcore >= RTE_MAX_LCORE)
 578                 return -EINVAL;
 579         if (lcore_states[lcore].is_service_core)
 580                 return -EALREADY;
 581
 582         set_lcore_state(lcore, ROLE_SERVICE);
 583
 584         /* ensure that after adding a core the mask and state are defaults */
 585         lcore_states[lcore].service_mask = 0;
 586         lcore_states[lcore].runstate = RUNSTATE_STOPPED;
 587
 588         rte_smp_wmb();
 589
 590         return rte_eal_wait_lcore(lcore);
 591 }
 592
 593 int32_t
 594 rte_service_lcore_del(uint32_t lcore)
 595 {
 596         if (lcore >= RTE_MAX_LCORE)
 597                 return -EINVAL;
 598
 599         struct core_state *cs = &lcore_states[lcore];
 600         if (!cs->is_service_core)
 601                 return -EINVAL;
 602
 603         if (cs->runstate != RUNSTATE_STOPPED)
 604                 return -EBUSY;
 605
 606         set_lcore_state(lcore, ROLE_RTE);
 607
 608         rte_smp_wmb();
 609         return 0;
 610 }
 611
 612 int32_t
 613 rte_service_lcore_start(uint32_t lcore)
 614 {
 615         if (lcore >= RTE_MAX_LCORE)
 616                 return -EINVAL;
 617
 618         struct core_state *cs = &lcore_states[lcore];
 619         if (!cs->is_service_core)
 620                 return -EINVAL;
 621
 622         if (cs->runstate == RUNSTATE_RUNNING)
 623                 return -EALREADY;
 624
 625         /* set core to run state first, and then launch otherwise it will
 626          * return immediately as runstate keeps it in the service poll loop
 627          */
 628         lcore_states[lcore].runstate = RUNSTATE_RUNNING;
 629
 630         int ret = rte_eal_remote_launch(rte_service_runner_func, 0, lcore);
 631         /* returns -EBUSY if the core is already launched, 0 on success */
 632         return ret;
 633 }
 634
 635 int32_t
 636 rte_service_lcore_stop(uint32_t lcore)
 637 {
 638         if (lcore >= RTE_MAX_LCORE)
 639                 return -EINVAL;
 640
 641         if (lcore_states[lcore].runstate == RUNSTATE_STOPPED)
 642                 return -EALREADY;
 643
 644         uint32_t i;
 645         uint64_t service_mask = lcore_states[lcore].service_mask;
 646         for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
 647                 int32_t enabled = service_mask & (UINT64_C(1) << i);
 648                 int32_t service_running = rte_service_runstate_get(i);
 649                 int32_t only_core = rte_services[i].num_mapped_cores == 1;
 650
 651                 /* if the core is mapped, and the service is running, and this
 652                  * is the only core that is mapped, the service would cease to
 653                  * run if this core stopped, so fail instead.
 654                  */
 655                 if (enabled && service_running && only_core)
 656                         return -EBUSY;
 657         }
 658
 659         lcore_states[lcore].runstate = RUNSTATE_STOPPED;
 660
 661         return 0;
 662 }
 663
 664 static void
 665 rte_service_dump_one(FILE *f, struct rte_service_spec_impl *s,
 666                      uint64_t all_cycles, uint32_t reset)
 667 {
 668         /* avoid divide by zero */
 669         if (all_cycles == 0)
 670                 all_cycles = 1;
 671
 672         int calls = 1;
 673         if (s->calls != 0)
 674                 calls = s->calls;
 675
 676         fprintf(f, "  %s: stats %d\tcalls %"PRIu64"\tcycles %"
 677                         PRIu64"\tavg: %"PRIu64"\n",
 678                         s->spec.name, service_stats_enabled(s), s->calls,
 679                         s->cycles_spent, s->cycles_spent / calls);
 680
 681         if (reset) {
 682                 s->cycles_spent = 0;
 683                 s->calls = 0;
 684         }
 685 }
 686
 687 static void
 688 service_dump_calls_per_lcore(FILE *f, uint32_t lcore, uint32_t reset)
 689 {
 690         uint32_t i;
 691         struct core_state *cs = &lcore_states[lcore];
 692
 693         fprintf(f, "%02d\t", lcore);
 694         for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
 695                 if (!service_valid(i))
 696                         continue;
 697                 fprintf(f, "%"PRIu64"\t", cs->calls_per_service[i]);
 698                 if (reset)
 699                         cs->calls_per_service[i] = 0;
 700         }
 701         fprintf(f, "\n");
 702 }
 703
 704 int32_t rte_service_dump(FILE *f, uint32_t id)
 705 {
 706         uint32_t i;
 707         int print_one = (id != UINT32_MAX);
 708
 709         uint64_t total_cycles = 0;
 710
 711         for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
 712                 if (!service_valid(i))
 713                         continue;
 714                 total_cycles += rte_services[i].cycles_spent;
 715         }
 716
 717         /* print only the specified service */
 718         if (print_one) {
 719                 struct rte_service_spec_impl *s;
 720                 SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 721                 fprintf(f, "Service %s Summary\n", s->spec.name);
 722                 uint32_t reset = 0;
 723                 rte_service_dump_one(f, s, total_cycles, reset);
 724                 return 0;
 725         }
 726
 727         /* print all services, as UINT32_MAX was passed as id */
 728         fprintf(f, "Services Summary\n");
 729         for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
 730                 if (!service_valid(i))
 731                         continue;
 732                 uint32_t reset = 1;
 733                 rte_service_dump_one(f, &rte_services[i], total_cycles, reset);
 734         }
 735
 736         fprintf(f, "Service Cores Summary\n");
 737         for (i = 0; i < RTE_MAX_LCORE; i++) {
 738                 if (lcore_config[i].core_role != ROLE_SERVICE)
 739                         continue;
 740
 741                 uint32_t reset = 1;
 742                 service_dump_calls_per_lcore(f, i, reset);
 743         }
 744
 745         return 0;
 746 }