lib/librte_eal/common/rte_service.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2017 Intel Corporation
   3  */
   4
   5 #include <stdio.h>
   6 #include <unistd.h>
   7 #include <inttypes.h>
   8 #include <limits.h>
   9 #include <string.h>
  10 #include <dirent.h>
  11
  12 #include <rte_compat.h>
  13 #include <rte_service.h>
  14 #include "include/rte_service_component.h"
  15
  16 #include <rte_eal.h>
  17 #include <rte_lcore.h>
  18 #include <rte_common.h>
  19 #include <rte_debug.h>
  20 #include <rte_cycles.h>
  21 #include <rte_atomic.h>
  22 #include <rte_memory.h>
  23 #include <rte_malloc.h>
  24
  25 #define RTE_SERVICE_NUM_MAX 64
  26
  27 #define SERVICE_F_REGISTERED    (1 << 0)
  28 #define SERVICE_F_STATS_ENABLED (1 << 1)
  29 #define SERVICE_F_START_CHECK   (1 << 2)
  30
  31 /* runstates for services and lcores, denoting if they are active or not */
  32 #define RUNSTATE_STOPPED 0
  33 #define RUNSTATE_RUNNING 1
  34
  35 /* internal representation of a service */
  36 struct rte_service_spec_impl {
  37         /* public part of the struct */
  38         struct rte_service_spec spec;
  39
  40         /* atomic lock that when set indicates a service core is currently
  41          * running this service callback. When not set, a core may take the
  42          * lock and then run the service callback.
  43          */
  44         rte_atomic32_t execute_lock;
  45
  46         /* API set/get-able variables */
  47         int8_t app_runstate;
  48         int8_t comp_runstate;
  49         uint8_t internal_flags;
  50
  51         /* per service statistics */
  52         rte_atomic32_t num_mapped_cores;
  53         uint64_t calls;
  54         uint64_t cycles_spent;
  55 } __rte_cache_aligned;
  56
  57 /* the internal values of a service core */
  58 struct core_state {
  59         /* map of services IDs are run on this core */
  60         uint64_t service_mask;
  61         uint8_t runstate; /* running or stopped */
  62         uint8_t is_service_core; /* set if core is currently a service core */
  63
  64         uint64_t loops;
  65         uint64_t calls_per_service[RTE_SERVICE_NUM_MAX];
  66 } __rte_cache_aligned;
  67
  68 static uint32_t rte_service_count;
  69 static struct rte_service_spec_impl *rte_services;
  70 static struct core_state *lcore_states;
  71 static uint32_t rte_service_library_initialized;
  72
  73 int32_t rte_service_init(void)
  74 {
  75         if (rte_service_library_initialized) {
  76                 printf("service library init() called, init flag %d\n",
  77                         rte_service_library_initialized);
  78                 return -EALREADY;
  79         }
  80
  81         rte_services = rte_calloc("rte_services", RTE_SERVICE_NUM_MAX,
  82                         sizeof(struct rte_service_spec_impl),
  83                         RTE_CACHE_LINE_SIZE);
  84         if (!rte_services) {
  85                 printf("error allocating rte services array\n");
  86                 goto fail_mem;
  87         }
  88
  89         lcore_states = rte_calloc("rte_service_core_states", RTE_MAX_LCORE,
  90                         sizeof(struct core_state), RTE_CACHE_LINE_SIZE);
  91         if (!lcore_states) {
  92                 printf("error allocating core states array\n");
  93                 goto fail_mem;
  94         }
  95
  96         int i;
  97         int count = 0;
  98         struct rte_config *cfg = rte_eal_get_configuration();
  99         for (i = 0; i < RTE_MAX_LCORE; i++) {
 100                 if (lcore_config[i].core_role == ROLE_SERVICE) {
 101                         if ((unsigned int)i == cfg->master_lcore)
 102                                 continue;
 103                         rte_service_lcore_add(i);
 104                         count++;
 105                 }
 106         }
 107
 108         rte_service_library_initialized = 1;
 109         return 0;
 110 fail_mem:
 111         if (rte_services)
 112                 rte_free(rte_services);
 113         if (lcore_states)
 114                 rte_free(lcore_states);
 115         return -ENOMEM;
 116 }
 117
 118 void
 119 rte_service_finalize(void)
 120 {
 121         if (!rte_service_library_initialized)
 122                 return;
 123
 124         if (rte_services)
 125                 rte_free(rte_services);
 126
 127         if (lcore_states)
 128                 rte_free(lcore_states);
 129
 130         rte_service_library_initialized = 0;
 131 }
 132
 133 /* returns 1 if service is registered and has not been unregistered
 134  * Returns 0 if service never registered, or has been unregistered
 135  */
 136 static inline int
 137 service_valid(uint32_t id)
 138 {
 139         return !!(rte_services[id].internal_flags & SERVICE_F_REGISTERED);
 140 }
 141
 142 /* validate ID and retrieve service pointer, or return error value */
 143 #define SERVICE_VALID_GET_OR_ERR_RET(id, service, retval) do {          \
 144         if (id >= RTE_SERVICE_NUM_MAX || !service_valid(id))            \
 145                 return retval;                                          \
 146         service = &rte_services[id];                                    \
 147 } while (0)
 148
 149 /* returns 1 if statistics should be collected for service
 150  * Returns 0 if statistics should not be collected for service
 151  */
 152 static inline int
 153 service_stats_enabled(struct rte_service_spec_impl *impl)
 154 {
 155         return !!(impl->internal_flags & SERVICE_F_STATS_ENABLED);
 156 }
 157
 158 static inline int
 159 service_mt_safe(struct rte_service_spec_impl *s)
 160 {
 161         return !!(s->spec.capabilities & RTE_SERVICE_CAP_MT_SAFE);
 162 }
 163
 164 int32_t
 165 rte_service_set_stats_enable(uint32_t id, int32_t enabled)
 166 {
 167         struct rte_service_spec_impl *s;
 168         SERVICE_VALID_GET_OR_ERR_RET(id, s, 0);
 169
 170         if (enabled)
 171                 s->internal_flags |= SERVICE_F_STATS_ENABLED;
 172         else
 173                 s->internal_flags &= ~(SERVICE_F_STATS_ENABLED);
 174
 175         return 0;
 176 }
 177
 178 int32_t
 179 rte_service_set_runstate_mapped_check(uint32_t id, int32_t enabled)
 180 {
 181         struct rte_service_spec_impl *s;
 182         SERVICE_VALID_GET_OR_ERR_RET(id, s, 0);
 183
 184         if (enabled)
 185                 s->internal_flags |= SERVICE_F_START_CHECK;
 186         else
 187                 s->internal_flags &= ~(SERVICE_F_START_CHECK);
 188
 189         return 0;
 190 }
 191
 192 uint32_t
 193 rte_service_get_count(void)
 194 {
 195         return rte_service_count;
 196 }
 197
 198 int32_t
 199 rte_service_get_by_name(const char *name, uint32_t *service_id)
 200 {
 201         if (!service_id)
 202                 return -EINVAL;
 203
 204         int i;
 205         for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
 206                 if (service_valid(i) &&
 207                                 strcmp(name, rte_services[i].spec.name) == 0) {
 208                         *service_id = i;
 209                         return 0;
 210                 }
 211         }
 212
 213         return -ENODEV;
 214 }
 215
 216 const char *
 217 rte_service_get_name(uint32_t id)
 218 {
 219         struct rte_service_spec_impl *s;
 220         SERVICE_VALID_GET_OR_ERR_RET(id, s, 0);
 221         return s->spec.name;
 222 }
 223
 224 int32_t
 225 rte_service_probe_capability(uint32_t id, uint32_t capability)
 226 {
 227         struct rte_service_spec_impl *s;
 228         SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 229         return !!(s->spec.capabilities & capability);
 230 }
 231
 232 int32_t
 233 rte_service_component_register(const struct rte_service_spec *spec,
 234                                uint32_t *id_ptr)
 235 {
 236         uint32_t i;
 237         int32_t free_slot = -1;
 238
 239         if (spec->callback == NULL || strlen(spec->name) == 0)
 240                 return -EINVAL;
 241
 242         for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
 243                 if (!service_valid(i)) {
 244                         free_slot = i;
 245                         break;
 246                 }
 247         }
 248
 249         if ((free_slot < 0) || (i == RTE_SERVICE_NUM_MAX))
 250                 return -ENOSPC;
 251
 252         struct rte_service_spec_impl *s = &rte_services[free_slot];
 253         s->spec = *spec;
 254         s->internal_flags |= SERVICE_F_REGISTERED | SERVICE_F_START_CHECK;
 255
 256         rte_smp_wmb();
 257         rte_service_count++;
 258
 259         if (id_ptr)
 260                 *id_ptr = free_slot;
 261
 262         return 0;
 263 }
 264
 265 int32_t
 266 rte_service_component_unregister(uint32_t id)
 267 {
 268         uint32_t i;
 269         struct rte_service_spec_impl *s;
 270         SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 271
 272         rte_service_count--;
 273         rte_smp_wmb();
 274
 275         s->internal_flags &= ~(SERVICE_F_REGISTERED);
 276
 277         /* clear the run-bit in all cores */
 278         for (i = 0; i < RTE_MAX_LCORE; i++)
 279                 lcore_states[i].service_mask &= ~(UINT64_C(1) << id);
 280
 281         memset(&rte_services[id], 0, sizeof(struct rte_service_spec_impl));
 282
 283         return 0;
 284 }
 285
 286 int32_t
 287 rte_service_component_runstate_set(uint32_t id, uint32_t runstate)
 288 {
 289         struct rte_service_spec_impl *s;
 290         SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 291
 292         if (runstate)
 293                 s->comp_runstate = RUNSTATE_RUNNING;
 294         else
 295                 s->comp_runstate = RUNSTATE_STOPPED;
 296
 297         rte_smp_wmb();
 298         return 0;
 299 }
 300
 301 int32_t
 302 rte_service_runstate_set(uint32_t id, uint32_t runstate)
 303 {
 304         struct rte_service_spec_impl *s;
 305         SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 306
 307         if (runstate)
 308                 s->app_runstate = RUNSTATE_RUNNING;
 309         else
 310                 s->app_runstate = RUNSTATE_STOPPED;
 311
 312         rte_smp_wmb();
 313         return 0;
 314 }
 315
 316 int32_t
 317 rte_service_runstate_get(uint32_t id)
 318 {
 319         struct rte_service_spec_impl *s;
 320         SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 321         rte_smp_rmb();
 322
 323         int check_disabled = !(s->internal_flags & SERVICE_F_START_CHECK);
 324         int lcore_mapped = (rte_atomic32_read(&s->num_mapped_cores) > 0);
 325
 326         return (s->app_runstate == RUNSTATE_RUNNING) &&
 327                 (s->comp_runstate == RUNSTATE_RUNNING) &&
 328                 (check_disabled | lcore_mapped);
 329 }
 330
 331 static inline void
 332 rte_service_runner_do_callback(struct rte_service_spec_impl *s,
 333                                struct core_state *cs, uint32_t service_idx)
 334 {
 335         void *userdata = s->spec.callback_userdata;
 336
 337         if (service_stats_enabled(s)) {
 338                 uint64_t start = rte_rdtsc();
 339                 s->spec.callback(userdata);
 340                 uint64_t end = rte_rdtsc();
 341                 s->cycles_spent += end - start;
 342                 cs->calls_per_service[service_idx]++;
 343                 s->calls++;
 344         } else
 345                 s->spec.callback(userdata);
 346 }
 347
 348
 349 static inline int32_t
 350 service_run(uint32_t i, struct core_state *cs, uint64_t service_mask)
 351 {
 352         if (!service_valid(i))
 353                 return -EINVAL;
 354         struct rte_service_spec_impl *s = &rte_services[i];
 355         if (s->comp_runstate != RUNSTATE_RUNNING ||
 356                         s->app_runstate != RUNSTATE_RUNNING ||
 357                         !(service_mask & (UINT64_C(1) << i)))
 358                 return -ENOEXEC;
 359
 360         /* check do we need cmpset, if MT safe or <= 1 core
 361          * mapped, atomic ops are not required.
 362          */
 363         const int use_atomics = (service_mt_safe(s) == 0) &&
 364                                 (rte_atomic32_read(&s->num_mapped_cores) > 1);
 365         if (use_atomics) {
 366                 if (!rte_atomic32_cmpset((uint32_t *)&s->execute_lock, 0, 1))
 367                         return -EBUSY;
 368
 369                 rte_service_runner_do_callback(s, cs, i);
 370                 rte_atomic32_clear(&s->execute_lock);
 371         } else
 372                 rte_service_runner_do_callback(s, cs, i);
 373
 374         return 0;
 375 }
 376
 377 int32_t rte_service_run_iter_on_app_lcore(uint32_t id,
 378                 uint32_t serialize_mt_unsafe)
 379 {
 380         /* run service on calling core, using all-ones as the service mask */
 381         if (!service_valid(id))
 382                 return -EINVAL;
 383
 384         struct core_state *cs = &lcore_states[rte_lcore_id()];
 385         struct rte_service_spec_impl *s = &rte_services[id];
 386
 387         /* Atomically add this core to the mapped cores first, then examine if
 388          * we can run the service. This avoids a race condition between
 389          * checking the value, and atomically adding to the mapped count.
 390          */
 391         if (serialize_mt_unsafe)
 392                 rte_atomic32_inc(&s->num_mapped_cores);
 393
 394         if (service_mt_safe(s) == 0 &&
 395                         rte_atomic32_read(&s->num_mapped_cores) > 1) {
 396                 if (serialize_mt_unsafe)
 397                         rte_atomic32_dec(&s->num_mapped_cores);
 398                 return -EBUSY;
 399         }
 400
 401         int ret = service_run(id, cs, UINT64_MAX);
 402
 403         if (serialize_mt_unsafe)
 404                 rte_atomic32_dec(&s->num_mapped_cores);
 405
 406         return ret;
 407 }
 408
 409 static int32_t
 410 rte_service_runner_func(void *arg)
 411 {
 412         RTE_SET_USED(arg);
 413         uint32_t i;
 414         const int lcore = rte_lcore_id();
 415         struct core_state *cs = &lcore_states[lcore];
 416
 417         while (lcore_states[lcore].runstate == RUNSTATE_RUNNING) {
 418                 const uint64_t service_mask = cs->service_mask;
 419
 420                 for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
 421                         /* return value ignored as no change to code flow */
 422                         service_run(i, cs, service_mask);
 423                 }
 424
 425                 cs->loops++;
 426
 427                 rte_smp_rmb();
 428         }
 429
 430         lcore_config[lcore].state = WAIT;
 431
 432         return 0;
 433 }
 434
 435 int32_t
 436 rte_service_lcore_count(void)
 437 {
 438         int32_t count = 0;
 439         uint32_t i;
 440         for (i = 0; i < RTE_MAX_LCORE; i++)
 441                 count += lcore_states[i].is_service_core;
 442         return count;
 443 }
 444
 445 int32_t
 446 rte_service_lcore_list(uint32_t array[], uint32_t n)
 447 {
 448         uint32_t count = rte_service_lcore_count();
 449         if (count > n)
 450                 return -ENOMEM;
 451
 452         if (!array)
 453                 return -EINVAL;
 454
 455         uint32_t i;
 456         uint32_t idx = 0;
 457         for (i = 0; i < RTE_MAX_LCORE; i++) {
 458                 struct core_state *cs = &lcore_states[i];
 459                 if (cs->is_service_core) {
 460                         array[idx] = i;
 461                         idx++;
 462                 }
 463         }
 464
 465         return count;
 466 }
 467
 468 int32_t
 469 rte_service_lcore_count_services(uint32_t lcore)
 470 {
 471         if (lcore >= RTE_MAX_LCORE)
 472                 return -EINVAL;
 473
 474         struct core_state *cs = &lcore_states[lcore];
 475         if (!cs->is_service_core)
 476                 return -ENOTSUP;
 477
 478         return __builtin_popcountll(cs->service_mask);
 479 }
 480
 481 int32_t
 482 rte_service_start_with_defaults(void)
 483 {
 484         /* create a default mapping from cores to services, then start the
 485          * services to make them transparent to unaware applications.
 486          */
 487         uint32_t i;
 488         int ret;
 489         uint32_t count = rte_service_get_count();
 490
 491         int32_t lcore_iter = 0;
 492         uint32_t ids[RTE_MAX_LCORE] = {0};
 493         int32_t lcore_count = rte_service_lcore_list(ids, RTE_MAX_LCORE);
 494
 495         if (lcore_count == 0)
 496                 return -ENOTSUP;
 497
 498         for (i = 0; (int)i < lcore_count; i++)
 499                 rte_service_lcore_start(ids[i]);
 500
 501         for (i = 0; i < count; i++) {
 502                 /* do 1:1 core mapping here, with each service getting
 503                  * assigned a single core by default. Adding multiple services
 504                  * should multiplex to a single core, or 1:1 if there are the
 505                  * same amount of services as service-cores
 506                  */
 507                 ret = rte_service_map_lcore_set(i, ids[lcore_iter], 1);
 508                 if (ret)
 509                         return -ENODEV;
 510
 511                 lcore_iter++;
 512                 if (lcore_iter >= lcore_count)
 513                         lcore_iter = 0;
 514
 515                 ret = rte_service_runstate_set(i, 1);
 516                 if (ret)
 517                         return -ENOEXEC;
 518         }
 519
 520         return 0;
 521 }
 522
 523 static int32_t
 524 service_update(struct rte_service_spec *service, uint32_t lcore,
 525                 uint32_t *set, uint32_t *enabled)
 526 {
 527         uint32_t i;
 528         int32_t sid = -1;
 529
 530         for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
 531                 if ((struct rte_service_spec *)&rte_services[i] == service &&
 532                                 service_valid(i)) {
 533                         sid = i;
 534                         break;
 535                 }
 536         }
 537
 538         if (sid == -1 || lcore >= RTE_MAX_LCORE)
 539                 return -EINVAL;
 540
 541         if (!lcore_states[lcore].is_service_core)
 542                 return -EINVAL;
 543
 544         uint64_t sid_mask = UINT64_C(1) << sid;
 545         if (set) {
 546                 uint64_t lcore_mapped = lcore_states[lcore].service_mask &
 547                         sid_mask;
 548
 549                 if (*set && !lcore_mapped) {
 550                         lcore_states[lcore].service_mask |= sid_mask;
 551                         rte_atomic32_inc(&rte_services[sid].num_mapped_cores);
 552                 }
 553                 if (!*set && lcore_mapped) {
 554                         lcore_states[lcore].service_mask &= ~(sid_mask);
 555                         rte_atomic32_dec(&rte_services[sid].num_mapped_cores);
 556                 }
 557         }
 558
 559         if (enabled)
 560                 *enabled = !!(lcore_states[lcore].service_mask & (sid_mask));
 561
 562         rte_smp_wmb();
 563
 564         return 0;
 565 }
 566
 567 int32_t
 568 rte_service_map_lcore_set(uint32_t id, uint32_t lcore, uint32_t enabled)
 569 {
 570         struct rte_service_spec_impl *s;
 571         SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 572         uint32_t on = enabled > 0;
 573         return service_update(&s->spec, lcore, &on, 0);
 574 }
 575
 576 int32_t
 577 rte_service_map_lcore_get(uint32_t id, uint32_t lcore)
 578 {
 579         struct rte_service_spec_impl *s;
 580         SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 581         uint32_t enabled;
 582         int ret = service_update(&s->spec, lcore, 0, &enabled);
 583         if (ret == 0)
 584                 return enabled;
 585         return ret;
 586 }
 587
 588 static void
 589 set_lcore_state(uint32_t lcore, int32_t state)
 590 {
 591         /* mark core state in hugepage backed config */
 592         struct rte_config *cfg = rte_eal_get_configuration();
 593         cfg->lcore_role[lcore] = state;
 594
 595         /* mark state in process local lcore_config */
 596         lcore_config[lcore].core_role = state;
 597
 598         /* update per-lcore optimized state tracking */
 599         lcore_states[lcore].is_service_core = (state == ROLE_SERVICE);
 600 }
 601
 602 int32_t
 603 rte_service_lcore_reset_all(void)
 604 {
 605         /* loop over cores, reset all to mask 0 */
 606         uint32_t i;
 607         for (i = 0; i < RTE_MAX_LCORE; i++) {
 608                 if (lcore_states[i].is_service_core) {
 609                         lcore_states[i].service_mask = 0;
 610                         set_lcore_state(i, ROLE_RTE);
 611                         lcore_states[i].runstate = RUNSTATE_STOPPED;
 612                 }
 613         }
 614         for (i = 0; i < RTE_SERVICE_NUM_MAX; i++)
 615                 rte_atomic32_set(&rte_services[i].num_mapped_cores, 0);
 616
 617         rte_smp_wmb();
 618
 619         return 0;
 620 }
 621
 622 int32_t
 623 rte_service_lcore_add(uint32_t lcore)
 624 {
 625         if (lcore >= RTE_MAX_LCORE)
 626                 return -EINVAL;
 627         if (lcore_states[lcore].is_service_core)
 628                 return -EALREADY;
 629
 630         set_lcore_state(lcore, ROLE_SERVICE);
 631
 632         /* ensure that after adding a core the mask and state are defaults */
 633         lcore_states[lcore].service_mask = 0;
 634         lcore_states[lcore].runstate = RUNSTATE_STOPPED;
 635
 636         rte_smp_wmb();
 637
 638         return rte_eal_wait_lcore(lcore);
 639 }
 640
 641 int32_t
 642 rte_service_lcore_del(uint32_t lcore)
 643 {
 644         if (lcore >= RTE_MAX_LCORE)
 645                 return -EINVAL;
 646
 647         struct core_state *cs = &lcore_states[lcore];
 648         if (!cs->is_service_core)
 649                 return -EINVAL;
 650
 651         if (cs->runstate != RUNSTATE_STOPPED)
 652                 return -EBUSY;
 653
 654         set_lcore_state(lcore, ROLE_RTE);
 655
 656         rte_smp_wmb();
 657         return 0;
 658 }
 659
 660 int32_t
 661 rte_service_lcore_start(uint32_t lcore)
 662 {
 663         if (lcore >= RTE_MAX_LCORE)
 664                 return -EINVAL;
 665
 666         struct core_state *cs = &lcore_states[lcore];
 667         if (!cs->is_service_core)
 668                 return -EINVAL;
 669
 670         if (cs->runstate == RUNSTATE_RUNNING)
 671                 return -EALREADY;
 672
 673         /* set core to run state first, and then launch otherwise it will
 674          * return immediately as runstate keeps it in the service poll loop
 675          */
 676         lcore_states[lcore].runstate = RUNSTATE_RUNNING;
 677
 678         int ret = rte_eal_remote_launch(rte_service_runner_func, 0, lcore);
 679         /* returns -EBUSY if the core is already launched, 0 on success */
 680         return ret;
 681 }
 682
 683 int32_t
 684 rte_service_lcore_stop(uint32_t lcore)
 685 {
 686         if (lcore >= RTE_MAX_LCORE)
 687                 return -EINVAL;
 688
 689         if (lcore_states[lcore].runstate == RUNSTATE_STOPPED)
 690                 return -EALREADY;
 691
 692         uint32_t i;
 693         uint64_t service_mask = lcore_states[lcore].service_mask;
 694         for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
 695                 int32_t enabled = service_mask & (UINT64_C(1) << i);
 696                 int32_t service_running = rte_service_runstate_get(i);
 697                 int32_t only_core = (1 ==
 698                         rte_atomic32_read(&rte_services[i].num_mapped_cores));
 699
 700                 /* if the core is mapped, and the service is running, and this
 701                  * is the only core that is mapped, the service would cease to
 702                  * run if this core stopped, so fail instead.
 703                  */
 704                 if (enabled && service_running && only_core)
 705                         return -EBUSY;
 706         }
 707
 708         lcore_states[lcore].runstate = RUNSTATE_STOPPED;
 709
 710         return 0;
 711 }
 712
 713 int32_t
 714 rte_service_attr_get(uint32_t id, uint32_t attr_id, uint32_t *attr_value)
 715 {
 716         struct rte_service_spec_impl *s;
 717         SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 718
 719         if (!attr_value)
 720                 return -EINVAL;
 721
 722         switch (attr_id) {
 723         case RTE_SERVICE_ATTR_CYCLES:
 724                 *attr_value = s->cycles_spent;
 725                 return 0;
 726         case RTE_SERVICE_ATTR_CALL_COUNT:
 727                 *attr_value = s->calls;
 728                 return 0;
 729         default:
 730                 return -EINVAL;
 731         }
 732 }
 733
 734 int32_t __rte_experimental
 735 rte_service_lcore_attr_get(uint32_t lcore, uint32_t attr_id,
 736                            uint64_t *attr_value)
 737 {
 738         struct core_state *cs;
 739
 740         if (lcore >= RTE_MAX_LCORE || !attr_value)
 741                 return -EINVAL;
 742
 743         cs = &lcore_states[lcore];
 744         if (!cs->is_service_core)
 745                 return -ENOTSUP;
 746
 747         switch (attr_id) {
 748         case RTE_SERVICE_LCORE_ATTR_LOOPS:
 749                 *attr_value = cs->loops;
 750                 return 0;
 751         default:
 752                 return -EINVAL;
 753         }
 754 }
 755
 756 static void
 757 rte_service_dump_one(FILE *f, struct rte_service_spec_impl *s,
 758                      uint64_t all_cycles, uint32_t reset)
 759 {
 760         /* avoid divide by zero */
 761         if (all_cycles == 0)
 762                 all_cycles = 1;
 763
 764         int calls = 1;
 765         if (s->calls != 0)
 766                 calls = s->calls;
 767
 768         if (reset) {
 769                 s->cycles_spent = 0;
 770                 s->calls = 0;
 771                 return;
 772         }
 773
 774         fprintf(f, "  %s: stats %d\tcalls %"PRIu64"\tcycles %"
 775                         PRIu64"\tavg: %"PRIu64"\n",
 776                         s->spec.name, service_stats_enabled(s), s->calls,
 777                         s->cycles_spent, s->cycles_spent / calls);
 778 }
 779
 780 int32_t
 781 rte_service_attr_reset_all(uint32_t id)
 782 {
 783         struct rte_service_spec_impl *s;
 784         SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 785
 786         int reset = 1;
 787         rte_service_dump_one(NULL, s, 0, reset);
 788         return 0;
 789 }
 790
 791 int32_t __rte_experimental
 792 rte_service_lcore_attr_reset_all(uint32_t lcore)
 793 {
 794         struct core_state *cs;
 795
 796         if (lcore >= RTE_MAX_LCORE)
 797                 return -EINVAL;
 798
 799         cs = &lcore_states[lcore];
 800         if (!cs->is_service_core)
 801                 return -ENOTSUP;
 802
 803         cs->loops = 0;
 804
 805         return 0;
 806 }
 807
 808 static void
 809 service_dump_calls_per_lcore(FILE *f, uint32_t lcore, uint32_t reset)
 810 {
 811         uint32_t i;
 812         struct core_state *cs = &lcore_states[lcore];
 813
 814         fprintf(f, "%02d\t", lcore);
 815         for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
 816                 if (!service_valid(i))
 817                         continue;
 818                 fprintf(f, "%"PRIu64"\t", cs->calls_per_service[i]);
 819                 if (reset)
 820                         cs->calls_per_service[i] = 0;
 821         }
 822         fprintf(f, "\n");
 823 }
 824
 825 int32_t
 826 rte_service_dump(FILE *f, uint32_t id)
 827 {
 828         uint32_t i;
 829         int print_one = (id != UINT32_MAX);
 830
 831         uint64_t total_cycles = 0;
 832
 833         for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
 834                 if (!service_valid(i))
 835                         continue;
 836                 total_cycles += rte_services[i].cycles_spent;
 837         }
 838
 839         /* print only the specified service */
 840         if (print_one) {
 841                 struct rte_service_spec_impl *s;
 842                 SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 843                 fprintf(f, "Service %s Summary\n", s->spec.name);
 844                 uint32_t reset = 0;
 845                 rte_service_dump_one(f, s, total_cycles, reset);
 846                 return 0;
 847         }
 848
 849         /* print all services, as UINT32_MAX was passed as id */
 850         fprintf(f, "Services Summary\n");
 851         for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
 852                 if (!service_valid(i))
 853                         continue;
 854                 uint32_t reset = 0;
 855                 rte_service_dump_one(f, &rte_services[i], total_cycles, reset);
 856         }
 857
 858         fprintf(f, "Service Cores Summary\n");
 859         for (i = 0; i < RTE_MAX_LCORE; i++) {
 860                 if (lcore_config[i].core_role != ROLE_SERVICE)
 861                         continue;
 862
 863                 uint32_t reset = 0;
 864                 service_dump_calls_per_lcore(f, i, reset);
 865         }
 866
 867         return 0;
 868 }