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