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         int32_t runstate;
  75         uint8_t internal_flags;
  76
  77         /* per service statistics */
  78         uint32_t num_mapped_cores;
  79         uint64_t calls;
  80         uint64_t cycles_spent;
  81 } __rte_cache_aligned;
  82
  83 /* the internal values of a service core */
  84 struct core_state {
  85         /* map of services IDs are run on this core */
  86         uint64_t service_mask;
  87         uint8_t runstate; /* running or stopped */
  88         uint8_t is_service_core; /* set if core is currently a service core */
  89
  90         /* extreme statistics */
  91         uint64_t calls_per_service[RTE_SERVICE_NUM_MAX];
  92 } __rte_cache_aligned;
  93
  94 static uint32_t rte_service_count;
  95 static struct rte_service_spec_impl *rte_services;
  96 static struct core_state *lcore_states;
  97 static uint32_t rte_service_library_initialized;
  98
  99 int32_t rte_service_init(void)
 100 {
 101         if (rte_service_library_initialized) {
 102                 printf("service library init() called, init flag %d\n",
 103                         rte_service_library_initialized);
 104                 return -EALREADY;
 105         }
 106
 107         rte_services = rte_calloc("rte_services", RTE_SERVICE_NUM_MAX,
 108                         sizeof(struct rte_service_spec_impl),
 109                         RTE_CACHE_LINE_SIZE);
 110         if (!rte_services) {
 111                 printf("error allocating rte services array\n");
 112                 return -ENOMEM;
 113         }
 114
 115         lcore_states = rte_calloc("rte_service_core_states", RTE_MAX_LCORE,
 116                         sizeof(struct core_state), RTE_CACHE_LINE_SIZE);
 117         if (!lcore_states) {
 118                 printf("error allocating core states array\n");
 119                 return -ENOMEM;
 120         }
 121
 122         int i;
 123         int count = 0;
 124         struct rte_config *cfg = rte_eal_get_configuration();
 125         for (i = 0; i < RTE_MAX_LCORE; i++) {
 126                 if (lcore_config[i].core_role == ROLE_SERVICE) {
 127                         if ((unsigned int)i == cfg->master_lcore)
 128                                 continue;
 129                         rte_service_lcore_add(i);
 130                         count++;
 131                 }
 132         }
 133
 134         rte_service_library_initialized = 1;
 135         return 0;
 136 }
 137
 138 /* returns 1 if service is registered and has not been unregistered
 139  * Returns 0 if service never registered, or has been unregistered
 140  */
 141 static inline int
 142 service_valid(uint32_t id)
 143 {
 144         return !!(rte_services[id].internal_flags & SERVICE_F_REGISTERED);
 145 }
 146
 147 /* validate ID and retrieve service pointer, or return error value */
 148 #define SERVICE_VALID_GET_OR_ERR_RET(id, service, retval) do {          \
 149         if (id >= RTE_SERVICE_NUM_MAX || !service_valid(id))            \
 150                 return retval;                                          \
 151         service = &rte_services[id];                                    \
 152 } while (0)
 153
 154 /* returns 1 if statistics should be colleced for service
 155  * Returns 0 if statistics should not be collected for service
 156  */
 157 static inline int
 158 service_stats_enabled(struct rte_service_spec_impl *impl)
 159 {
 160         return !!(impl->internal_flags & SERVICE_F_STATS_ENABLED);
 161 }
 162
 163 static inline int
 164 service_mt_safe(struct rte_service_spec_impl *s)
 165 {
 166         return s->spec.capabilities & RTE_SERVICE_CAP_MT_SAFE;
 167 }
 168
 169 int32_t rte_service_set_stats_enable(uint32_t id, int32_t enabled)
 170 {
 171         struct rte_service_spec_impl *s;
 172         SERVICE_VALID_GET_OR_ERR_RET(id, s, 0);
 173
 174         if (enabled)
 175                 s->internal_flags |= SERVICE_F_STATS_ENABLED;
 176         else
 177                 s->internal_flags &= ~(SERVICE_F_STATS_ENABLED);
 178
 179         return 0;
 180 }
 181
 182 uint32_t
 183 rte_service_get_count(void)
 184 {
 185         return rte_service_count;
 186 }
 187
 188 struct rte_service_spec *
 189 rte_service_get_by_id(uint32_t id)
 190 {
 191         struct rte_service_spec *service = NULL;
 192         if (id < rte_service_count)
 193                 service = (struct rte_service_spec *)&rte_services[id];
 194
 195         return service;
 196 }
 197
 198 struct rte_service_spec *rte_service_get_by_name(const char *name)
 199 {
 200         struct rte_service_spec *service = NULL;
 201         int i;
 202         for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
 203                 if (service_valid(i) &&
 204                                 strcmp(name, rte_services[i].spec.name) == 0) {
 205                         service = (struct rte_service_spec *)&rte_services[i];
 206                         break;
 207                 }
 208         }
 209
 210         return service;
 211 }
 212
 213 const char *
 214 rte_service_get_name(uint32_t id)
 215 {
 216         struct rte_service_spec_impl *s;
 217         SERVICE_VALID_GET_OR_ERR_RET(id, s, 0);
 218         return s->spec.name;
 219 }
 220
 221 int32_t
 222 rte_service_probe_capability(uint32_t id, uint32_t capability)
 223 {
 224         struct rte_service_spec_impl *s;
 225         SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 226         return s->spec.capabilities & capability;
 227 }
 228
 229 int32_t
 230 rte_service_component_register(const struct rte_service_spec *spec,
 231                                uint32_t *id_ptr)
 232 {
 233         uint32_t i;
 234         int32_t free_slot = -1;
 235
 236         if (spec->callback == NULL || strlen(spec->name) == 0)
 237                 return -EINVAL;
 238
 239         for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
 240                 if (!service_valid(i)) {
 241                         free_slot = i;
 242                         break;
 243                 }
 244         }
 245
 246         if ((free_slot < 0) || (i == RTE_SERVICE_NUM_MAX))
 247                 return -ENOSPC;
 248
 249         struct rte_service_spec_impl *s = &rte_services[free_slot];
 250         s->spec = *spec;
 251         s->internal_flags |= SERVICE_F_REGISTERED;
 252
 253         rte_smp_wmb();
 254         rte_service_count++;
 255
 256         if (id_ptr)
 257                 *id_ptr = free_slot;
 258
 259         return 0;
 260 }
 261
 262 int32_t
 263 rte_service_unregister(struct rte_service_spec *spec)
 264 {
 265         struct rte_service_spec_impl *s = NULL;
 266         struct rte_service_spec_impl *spec_impl =
 267                 (struct rte_service_spec_impl *)spec;
 268
 269         uint32_t i;
 270         uint32_t service_id;
 271         for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
 272                 if (&rte_services[i] == spec_impl) {
 273                         s = spec_impl;
 274                         service_id = i;
 275                         break;
 276                 }
 277         }
 278
 279         if (!s)
 280                 return -EINVAL;
 281
 282         rte_service_count--;
 283         rte_smp_wmb();
 284
 285         s->internal_flags &= ~(SERVICE_F_REGISTERED);
 286
 287         for (i = 0; i < RTE_MAX_LCORE; i++)
 288                 lcore_states[i].service_mask &= ~(UINT64_C(1) << service_id);
 289
 290         memset(&rte_services[service_id], 0,
 291                         sizeof(struct rte_service_spec_impl));
 292
 293         return 0;
 294 }
 295
 296 int32_t
 297 rte_service_runstate_set(uint32_t id, uint32_t runstate)
 298 {
 299         struct rte_service_spec_impl *s;
 300         SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 301
 302         if (runstate)
 303                 s->runstate = RUNSTATE_RUNNING;
 304         else
 305                 s->runstate = RUNSTATE_STOPPED;
 306
 307         rte_smp_wmb();
 308         return 0;
 309 }
 310
 311 int32_t
 312 rte_service_runstate_get(uint32_t id)
 313 {
 314         struct rte_service_spec_impl *s;
 315         SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 316
 317         return (s->runstate == RUNSTATE_RUNNING) && (s->num_mapped_cores > 0);
 318 }
 319
 320 static int32_t
 321 rte_service_runner_func(void *arg)
 322 {
 323         RTE_SET_USED(arg);
 324         uint32_t i;
 325         const int lcore = rte_lcore_id();
 326         struct core_state *cs = &lcore_states[lcore];
 327
 328         while (lcore_states[lcore].runstate == RUNSTATE_RUNNING) {
 329                 const uint64_t service_mask = cs->service_mask;
 330                 for (i = 0; i < rte_service_count; i++) {
 331                         struct rte_service_spec_impl *s = &rte_services[i];
 332                         if (s->runstate != RUNSTATE_RUNNING ||
 333                                         !(service_mask & (UINT64_C(1) << i)))
 334                                 continue;
 335
 336                         /* check do we need cmpset, if MT safe or <= 1 core
 337                          * mapped, atomic ops are not required.
 338                          */
 339                         const int need_cmpset = !((service_mt_safe(s) == 0) &&
 340                                                 (s->num_mapped_cores > 1));
 341                         uint32_t *lock = (uint32_t *)&s->execute_lock;
 342
 343                         if (need_cmpset || rte_atomic32_cmpset(lock, 0, 1)) {
 344                                 void *userdata = s->spec.callback_userdata;
 345
 346                                 if (service_stats_enabled(s)) {
 347                                         uint64_t start = rte_rdtsc();
 348                                         s->spec.callback(userdata);
 349                                         uint64_t end = rte_rdtsc();
 350                                         s->cycles_spent += end - start;
 351                                         cs->calls_per_service[i]++;
 352                                         s->calls++;
 353                                 } else
 354                                         s->spec.callback(userdata);
 355
 356                                 if (need_cmpset)
 357                                         rte_atomic32_clear(&s->execute_lock);
 358                         }
 359                 }
 360
 361                 rte_smp_rmb();
 362         }
 363
 364         lcore_config[lcore].state = WAIT;
 365
 366         return 0;
 367 }
 368
 369 int32_t
 370 rte_service_lcore_count(void)
 371 {
 372         int32_t count = 0;
 373         uint32_t i;
 374         for (i = 0; i < RTE_MAX_LCORE; i++)
 375                 count += lcore_states[i].is_service_core;
 376         return count;
 377 }
 378
 379 int32_t
 380 rte_service_lcore_list(uint32_t array[], uint32_t n)
 381 {
 382         uint32_t count = rte_service_lcore_count();
 383         if (count > n)
 384                 return -ENOMEM;
 385
 386         if (!array)
 387                 return -EINVAL;
 388
 389         uint32_t i;
 390         uint32_t idx = 0;
 391         for (i = 0; i < RTE_MAX_LCORE; i++) {
 392                 struct core_state *cs = &lcore_states[i];
 393                 if (cs->is_service_core) {
 394                         array[idx] = i;
 395                         idx++;
 396                 }
 397         }
 398
 399         return count;
 400 }
 401
 402 int32_t
 403 rte_service_lcore_count_services(uint32_t lcore)
 404 {
 405         if (lcore >= RTE_MAX_LCORE)
 406                 return -EINVAL;
 407
 408         struct core_state *cs = &lcore_states[lcore];
 409         if (!cs->is_service_core)
 410                 return -ENOTSUP;
 411
 412         return __builtin_popcountll(cs->service_mask);
 413 }
 414
 415 int32_t
 416 rte_service_start_with_defaults(void)
 417 {
 418         /* create a default mapping from cores to services, then start the
 419          * services to make them transparent to unaware applications.
 420          */
 421         uint32_t i;
 422         int ret;
 423         uint32_t count = rte_service_get_count();
 424
 425         int32_t lcore_iter = 0;
 426         uint32_t ids[RTE_MAX_LCORE];
 427         int32_t lcore_count = rte_service_lcore_list(ids, RTE_MAX_LCORE);
 428
 429         if (lcore_count == 0)
 430                 return -ENOTSUP;
 431
 432         for (i = 0; (int)i < lcore_count; i++)
 433                 rte_service_lcore_start(ids[i]);
 434
 435         for (i = 0; i < count; i++) {
 436                 struct rte_service_spec *s = rte_service_get_by_id(i);
 437                 if (!s)
 438                         return -EINVAL;
 439
 440                 /* do 1:1 core mapping here, with each service getting
 441                  * assigned a single core by default. Adding multiple services
 442                  * should multiplex to a single core, or 1:1 if there are the
 443                  * same amount of services as service-cores
 444                  */
 445                 ret = rte_service_map_lcore_set(i, ids[lcore_iter], 1);
 446                 if (ret)
 447                         return -ENODEV;
 448
 449                 lcore_iter++;
 450                 if (lcore_iter >= lcore_count)
 451                         lcore_iter = 0;
 452
 453                 ret = rte_service_runstate_set(i, 1);
 454                 if (ret)
 455                         return -ENOEXEC;
 456         }
 457
 458         return 0;
 459 }
 460
 461 static int32_t
 462 service_update(struct rte_service_spec *service, uint32_t lcore,
 463                 uint32_t *set, uint32_t *enabled)
 464 {
 465         uint32_t i;
 466         int32_t sid = -1;
 467
 468         for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
 469                 if ((struct rte_service_spec *)&rte_services[i] == service &&
 470                                 service_valid(i)) {
 471                         sid = i;
 472                         break;
 473                 }
 474         }
 475
 476         if (sid == -1 || lcore >= RTE_MAX_LCORE)
 477                 return -EINVAL;
 478
 479         if (!lcore_states[lcore].is_service_core)
 480                 return -EINVAL;
 481
 482         uint64_t sid_mask = UINT64_C(1) << sid;
 483         if (set) {
 484                 if (*set) {
 485                         lcore_states[lcore].service_mask |= sid_mask;
 486                         rte_services[sid].num_mapped_cores++;
 487                 } else {
 488                         lcore_states[lcore].service_mask &= ~(sid_mask);
 489                         rte_services[sid].num_mapped_cores--;
 490                 }
 491         }
 492
 493         if (enabled)
 494                 *enabled = (lcore_states[lcore].service_mask & (sid_mask));
 495
 496         rte_smp_wmb();
 497
 498         return 0;
 499 }
 500
 501 int32_t
 502 rte_service_map_lcore_set(uint32_t id, uint32_t lcore, uint32_t enabled)
 503 {
 504         struct rte_service_spec_impl *s;
 505         SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 506         uint32_t on = enabled > 0;
 507         return service_update(&s->spec, lcore, &on, 0);
 508 }
 509
 510 int32_t
 511 rte_service_map_lcore_get(uint32_t id, uint32_t lcore)
 512 {
 513         struct rte_service_spec_impl *s;
 514         SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 515         uint32_t enabled;
 516         int ret = service_update(&s->spec, lcore, 0, &enabled);
 517         if (ret == 0)
 518                 return enabled;
 519         return ret;
 520 }
 521
 522 int32_t rte_service_lcore_reset_all(void)
 523 {
 524         /* loop over cores, reset all to mask 0 */
 525         uint32_t i;
 526         for (i = 0; i < RTE_MAX_LCORE; i++) {
 527                 lcore_states[i].service_mask = 0;
 528                 lcore_states[i].is_service_core = 0;
 529                 lcore_states[i].runstate = RUNSTATE_STOPPED;
 530         }
 531         for (i = 0; i < RTE_SERVICE_NUM_MAX; i++)
 532                 rte_services[i].num_mapped_cores = 0;
 533
 534         rte_smp_wmb();
 535
 536         return 0;
 537 }
 538
 539 static void
 540 set_lcore_state(uint32_t lcore, int32_t state)
 541 {
 542         /* mark core state in hugepage backed config */
 543         struct rte_config *cfg = rte_eal_get_configuration();
 544         cfg->lcore_role[lcore] = state;
 545
 546         /* mark state in process local lcore_config */
 547         lcore_config[lcore].core_role = state;
 548
 549         /* update per-lcore optimized state tracking */
 550         lcore_states[lcore].is_service_core = (state == ROLE_SERVICE);
 551 }
 552
 553 int32_t
 554 rte_service_lcore_add(uint32_t lcore)
 555 {
 556         if (lcore >= RTE_MAX_LCORE)
 557                 return -EINVAL;
 558         if (lcore_states[lcore].is_service_core)
 559                 return -EALREADY;
 560
 561         set_lcore_state(lcore, ROLE_SERVICE);
 562
 563         /* ensure that after adding a core the mask and state are defaults */
 564         lcore_states[lcore].service_mask = 0;
 565         lcore_states[lcore].runstate = RUNSTATE_STOPPED;
 566
 567         rte_smp_wmb();
 568         return 0;
 569 }
 570
 571 int32_t
 572 rte_service_lcore_del(uint32_t lcore)
 573 {
 574         if (lcore >= RTE_MAX_LCORE)
 575                 return -EINVAL;
 576
 577         struct core_state *cs = &lcore_states[lcore];
 578         if (!cs->is_service_core)
 579                 return -EINVAL;
 580
 581         if (cs->runstate != RUNSTATE_STOPPED)
 582                 return -EBUSY;
 583
 584         set_lcore_state(lcore, ROLE_RTE);
 585
 586         rte_smp_wmb();
 587         return 0;
 588 }
 589
 590 int32_t
 591 rte_service_lcore_start(uint32_t lcore)
 592 {
 593         if (lcore >= RTE_MAX_LCORE)
 594                 return -EINVAL;
 595
 596         struct core_state *cs = &lcore_states[lcore];
 597         if (!cs->is_service_core)
 598                 return -EINVAL;
 599
 600         if (cs->runstate == RUNSTATE_RUNNING)
 601                 return -EALREADY;
 602
 603         /* set core to run state first, and then launch otherwise it will
 604          * return immediately as runstate keeps it in the service poll loop
 605          */
 606         lcore_states[lcore].runstate = RUNSTATE_RUNNING;
 607
 608         int ret = rte_eal_remote_launch(rte_service_runner_func, 0, lcore);
 609         /* returns -EBUSY if the core is already launched, 0 on success */
 610         return ret;
 611 }
 612
 613 int32_t
 614 rte_service_lcore_stop(uint32_t lcore)
 615 {
 616         if (lcore >= RTE_MAX_LCORE)
 617                 return -EINVAL;
 618
 619         if (lcore_states[lcore].runstate == RUNSTATE_STOPPED)
 620                 return -EALREADY;
 621
 622         uint32_t i;
 623         for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
 624                 int32_t enabled =
 625                         lcore_states[i].service_mask & (UINT64_C(1) << i);
 626                 int32_t service_running = rte_services[i].runstate !=
 627                                                 RUNSTATE_STOPPED;
 628                 int32_t only_core = rte_services[i].num_mapped_cores == 1;
 629
 630                 /* if the core is mapped, and the service is running, and this
 631                  * is the only core that is mapped, the service would cease to
 632                  * run if this core stopped, so fail instead.
 633                  */
 634                 if (enabled && service_running && only_core)
 635                         return -EBUSY;
 636         }
 637
 638         lcore_states[lcore].runstate = RUNSTATE_STOPPED;
 639
 640         return 0;
 641 }
 642
 643 static void
 644 rte_service_dump_one(FILE *f, struct rte_service_spec_impl *s,
 645                      uint64_t all_cycles, uint32_t reset)
 646 {
 647         /* avoid divide by zero */
 648         if (all_cycles == 0)
 649                 all_cycles = 1;
 650
 651         int calls = 1;
 652         if (s->calls != 0)
 653                 calls = s->calls;
 654
 655         fprintf(f, "  %s: stats %d\tcalls %"PRIu64"\tcycles %"
 656                         PRIu64"\tavg: %"PRIu64"\n",
 657                         s->spec.name, service_stats_enabled(s), s->calls,
 658                         s->cycles_spent, s->cycles_spent / calls);
 659
 660         if (reset) {
 661                 s->cycles_spent = 0;
 662                 s->calls = 0;
 663         }
 664 }
 665
 666 static void
 667 service_dump_calls_per_lcore(FILE *f, uint32_t lcore, uint32_t reset)
 668 {
 669         uint32_t i;
 670         struct core_state *cs = &lcore_states[lcore];
 671
 672         fprintf(f, "%02d\t", lcore);
 673         for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
 674                 if (!service_valid(i))
 675                         continue;
 676                 fprintf(f, "%"PRIu64"\t", cs->calls_per_service[i]);
 677                 if (reset)
 678                         cs->calls_per_service[i] = 0;
 679         }
 680         fprintf(f, "\n");
 681 }
 682
 683 int32_t rte_service_dump(FILE *f, uint32_t id)
 684 {
 685         uint32_t i;
 686         int print_one = (id != UINT32_MAX);
 687
 688         uint64_t total_cycles = 0;
 689         for (i = 0; i < rte_service_count; i++) {
 690                 if (!service_valid(i))
 691                         continue;
 692                 total_cycles += rte_services[i].cycles_spent;
 693         }
 694
 695         /* print only the specified service */
 696         if (print_one) {
 697                 struct rte_service_spec_impl *s;
 698                 SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 699                 fprintf(f, "Service %s Summary\n", s->spec.name);
 700                 uint32_t reset = 0;
 701                 rte_service_dump_one(f, s, total_cycles, reset);
 702                 return 0;
 703         }
 704
 705         /* print all services, as UINT32_MAX was passed as id */
 706         fprintf(f, "Services Summary\n");
 707         for (i = 0; i < rte_service_count; i++) {
 708                 uint32_t reset = 1;
 709                 rte_service_dump_one(f, &rte_services[i], total_cycles, reset);
 710         }
 711
 712         fprintf(f, "Service Cores Summary\n");
 713         for (i = 0; i < RTE_MAX_LCORE; i++) {
 714                 if (lcore_config[i].core_role != ROLE_SERVICE)
 715                         continue;
 716
 717                 uint32_t reset = 0;
 718                 service_dump_calls_per_lcore(f, i, reset);
 719         }
 720
 721         return 0;
 722 }