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 void rte_service_finalize(void)
 118 {
 119         if (!rte_service_library_initialized)
 120                 return;
 121
 122         if (rte_services)
 123                 rte_free(rte_services);
 124
 125         if (lcore_states)
 126                 rte_free(lcore_states);
 127
 128         rte_service_library_initialized = 0;
 129 }
 130
 131 /* returns 1 if service is registered and has not been unregistered
 132  * Returns 0 if service never registered, or has been unregistered
 133  */
 134 static inline int
 135 service_valid(uint32_t id)
 136 {
 137         return !!(rte_services[id].internal_flags & SERVICE_F_REGISTERED);
 138 }
 139
 140 /* validate ID and retrieve service pointer, or return error value */
 141 #define SERVICE_VALID_GET_OR_ERR_RET(id, service, retval) do {          \
 142         if (id >= RTE_SERVICE_NUM_MAX || !service_valid(id))            \
 143                 return retval;                                          \
 144         service = &rte_services[id];                                    \
 145 } while (0)
 146
 147 /* returns 1 if statistics should be collected for service
 148  * Returns 0 if statistics should not be collected for service
 149  */
 150 static inline int
 151 service_stats_enabled(struct rte_service_spec_impl *impl)
 152 {
 153         return !!(impl->internal_flags & SERVICE_F_STATS_ENABLED);
 154 }
 155
 156 static inline int
 157 service_mt_safe(struct rte_service_spec_impl *s)
 158 {
 159         return !!(s->spec.capabilities & RTE_SERVICE_CAP_MT_SAFE);
 160 }
 161
 162 int32_t rte_service_set_stats_enable(uint32_t id, int32_t enabled)
 163 {
 164         struct rte_service_spec_impl *s;
 165         SERVICE_VALID_GET_OR_ERR_RET(id, s, 0);
 166
 167         if (enabled)
 168                 s->internal_flags |= SERVICE_F_STATS_ENABLED;
 169         else
 170                 s->internal_flags &= ~(SERVICE_F_STATS_ENABLED);
 171
 172         return 0;
 173 }
 174
 175 int32_t rte_service_set_runstate_mapped_check(uint32_t id, int32_t enabled)
 176 {
 177         struct rte_service_spec_impl *s;
 178         SERVICE_VALID_GET_OR_ERR_RET(id, s, 0);
 179
 180         if (enabled)
 181                 s->internal_flags |= SERVICE_F_START_CHECK;
 182         else
 183                 s->internal_flags &= ~(SERVICE_F_START_CHECK);
 184
 185         return 0;
 186 }
 187
 188 uint32_t
 189 rte_service_get_count(void)
 190 {
 191         return rte_service_count;
 192 }
 193
 194 int32_t rte_service_get_by_name(const char *name, uint32_t *service_id)
 195 {
 196         if (!service_id)
 197                 return -EINVAL;
 198
 199         int i;
 200         for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
 201                 if (service_valid(i) &&
 202                                 strcmp(name, rte_services[i].spec.name) == 0) {
 203                         *service_id = i;
 204                         return 0;
 205                 }
 206         }
 207
 208         return -ENODEV;
 209 }
 210
 211 const char *
 212 rte_service_get_name(uint32_t id)
 213 {
 214         struct rte_service_spec_impl *s;
 215         SERVICE_VALID_GET_OR_ERR_RET(id, s, 0);
 216         return s->spec.name;
 217 }
 218
 219 int32_t
 220 rte_service_probe_capability(uint32_t id, uint32_t capability)
 221 {
 222         struct rte_service_spec_impl *s;
 223         SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 224         return !!(s->spec.capabilities & capability);
 225 }
 226
 227 int32_t
 228 rte_service_component_register(const struct rte_service_spec *spec,
 229                                uint32_t *id_ptr)
 230 {
 231         uint32_t i;
 232         int32_t free_slot = -1;
 233
 234         if (spec->callback == NULL || strlen(spec->name) == 0)
 235                 return -EINVAL;
 236
 237         for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
 238                 if (!service_valid(i)) {
 239                         free_slot = i;
 240                         break;
 241                 }
 242         }
 243
 244         if ((free_slot < 0) || (i == RTE_SERVICE_NUM_MAX))
 245                 return -ENOSPC;
 246
 247         struct rte_service_spec_impl *s = &rte_services[free_slot];
 248         s->spec = *spec;
 249         s->internal_flags |= SERVICE_F_REGISTERED | SERVICE_F_START_CHECK;
 250
 251         rte_smp_wmb();
 252         rte_service_count++;
 253
 254         if (id_ptr)
 255                 *id_ptr = free_slot;
 256
 257         return 0;
 258 }
 259
 260 int32_t
 261 rte_service_component_unregister(uint32_t id)
 262 {
 263         uint32_t i;
 264         struct rte_service_spec_impl *s;
 265         SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 266
 267         rte_service_count--;
 268         rte_smp_wmb();
 269
 270         s->internal_flags &= ~(SERVICE_F_REGISTERED);
 271
 272         /* clear the run-bit in all cores */
 273         for (i = 0; i < RTE_MAX_LCORE; i++)
 274                 lcore_states[i].service_mask &= ~(UINT64_C(1) << id);
 275
 276         memset(&rte_services[id], 0, sizeof(struct rte_service_spec_impl));
 277
 278         return 0;
 279 }
 280
 281 int32_t
 282 rte_service_component_runstate_set(uint32_t id, uint32_t runstate)
 283 {
 284         struct rte_service_spec_impl *s;
 285         SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 286
 287         if (runstate)
 288                 s->comp_runstate = RUNSTATE_RUNNING;
 289         else
 290                 s->comp_runstate = RUNSTATE_STOPPED;
 291
 292         rte_smp_wmb();
 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->app_runstate = RUNSTATE_RUNNING;
 304         else
 305                 s->app_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         rte_smp_rmb();
 317
 318         int check_disabled = !(s->internal_flags & SERVICE_F_START_CHECK);
 319         int lcore_mapped = (rte_atomic32_read(&s->num_mapped_cores) > 0);
 320
 321         return (s->app_runstate == RUNSTATE_RUNNING) &&
 322                 (s->comp_runstate == RUNSTATE_RUNNING) &&
 323                 (check_disabled | lcore_mapped);
 324 }
 325
 326 static inline void
 327 rte_service_runner_do_callback(struct rte_service_spec_impl *s,
 328                                struct core_state *cs, uint32_t service_idx)
 329 {
 330         void *userdata = s->spec.callback_userdata;
 331
 332         if (service_stats_enabled(s)) {
 333                 uint64_t start = rte_rdtsc();
 334                 s->spec.callback(userdata);
 335                 uint64_t end = rte_rdtsc();
 336                 s->cycles_spent += end - start;
 337                 cs->calls_per_service[service_idx]++;
 338                 s->calls++;
 339         } else
 340                 s->spec.callback(userdata);
 341 }
 342
 343
 344 static inline int32_t
 345 service_run(uint32_t i, struct core_state *cs, uint64_t service_mask)
 346 {
 347         if (!service_valid(i))
 348                 return -EINVAL;
 349         struct rte_service_spec_impl *s = &rte_services[i];
 350         if (s->comp_runstate != RUNSTATE_RUNNING ||
 351                         s->app_runstate != RUNSTATE_RUNNING ||
 352                         !(service_mask & (UINT64_C(1) << i)))
 353                 return -ENOEXEC;
 354
 355         /* check do we need cmpset, if MT safe or <= 1 core
 356          * mapped, atomic ops are not required.
 357          */
 358         const int use_atomics = (service_mt_safe(s) == 0) &&
 359                                 (rte_atomic32_read(&s->num_mapped_cores) > 1);
 360         if (use_atomics) {
 361                 if (!rte_atomic32_cmpset((uint32_t *)&s->execute_lock, 0, 1))
 362                         return -EBUSY;
 363
 364                 rte_service_runner_do_callback(s, cs, i);
 365                 rte_atomic32_clear(&s->execute_lock);
 366         } else
 367                 rte_service_runner_do_callback(s, cs, i);
 368
 369         return 0;
 370 }
 371
 372 int32_t rte_service_run_iter_on_app_lcore(uint32_t id,
 373                 uint32_t serialize_mt_unsafe)
 374 {
 375         /* run service on calling core, using all-ones as the service mask */
 376         if (!service_valid(id))
 377                 return -EINVAL;
 378
 379         struct core_state *cs = &lcore_states[rte_lcore_id()];
 380         struct rte_service_spec_impl *s = &rte_services[id];
 381
 382         /* Atomically add this core to the mapped cores first, then examine if
 383          * we can run the service. This avoids a race condition between
 384          * checking the value, and atomically adding to the mapped count.
 385          */
 386         if (serialize_mt_unsafe)
 387                 rte_atomic32_inc(&s->num_mapped_cores);
 388
 389         if (service_mt_safe(s) == 0 &&
 390                         rte_atomic32_read(&s->num_mapped_cores) > 1) {
 391                 if (serialize_mt_unsafe)
 392                         rte_atomic32_dec(&s->num_mapped_cores);
 393                 return -EBUSY;
 394         }
 395
 396         int ret = service_run(id, cs, UINT64_MAX);
 397
 398         if (serialize_mt_unsafe)
 399                 rte_atomic32_dec(&s->num_mapped_cores);
 400
 401         return ret;
 402 }
 403
 404 static int32_t
 405 rte_service_runner_func(void *arg)
 406 {
 407         RTE_SET_USED(arg);
 408         uint32_t i;
 409         const int lcore = rte_lcore_id();
 410         struct core_state *cs = &lcore_states[lcore];
 411
 412         while (lcore_states[lcore].runstate == RUNSTATE_RUNNING) {
 413                 const uint64_t service_mask = cs->service_mask;
 414
 415                 for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
 416                         /* return value ignored as no change to code flow */
 417                         service_run(i, cs, service_mask);
 418                 }
 419
 420                 rte_smp_rmb();
 421         }
 422
 423         lcore_config[lcore].state = WAIT;
 424
 425         return 0;
 426 }
 427
 428 int32_t
 429 rte_service_lcore_count(void)
 430 {
 431         int32_t count = 0;
 432         uint32_t i;
 433         for (i = 0; i < RTE_MAX_LCORE; i++)
 434                 count += lcore_states[i].is_service_core;
 435         return count;
 436 }
 437
 438 int32_t
 439 rte_service_lcore_list(uint32_t array[], uint32_t n)
 440 {
 441         uint32_t count = rte_service_lcore_count();
 442         if (count > n)
 443                 return -ENOMEM;
 444
 445         if (!array)
 446                 return -EINVAL;
 447
 448         uint32_t i;
 449         uint32_t idx = 0;
 450         for (i = 0; i < RTE_MAX_LCORE; i++) {
 451                 struct core_state *cs = &lcore_states[i];
 452                 if (cs->is_service_core) {
 453                         array[idx] = i;
 454                         idx++;
 455                 }
 456         }
 457
 458         return count;
 459 }
 460
 461 int32_t
 462 rte_service_lcore_count_services(uint32_t lcore)
 463 {
 464         if (lcore >= RTE_MAX_LCORE)
 465                 return -EINVAL;
 466
 467         struct core_state *cs = &lcore_states[lcore];
 468         if (!cs->is_service_core)
 469                 return -ENOTSUP;
 470
 471         return __builtin_popcountll(cs->service_mask);
 472 }
 473
 474 int32_t
 475 rte_service_start_with_defaults(void)
 476 {
 477         /* create a default mapping from cores to services, then start the
 478          * services to make them transparent to unaware applications.
 479          */
 480         uint32_t i;
 481         int ret;
 482         uint32_t count = rte_service_get_count();
 483
 484         int32_t lcore_iter = 0;
 485         uint32_t ids[RTE_MAX_LCORE] = {0};
 486         int32_t lcore_count = rte_service_lcore_list(ids, RTE_MAX_LCORE);
 487
 488         if (lcore_count == 0)
 489                 return -ENOTSUP;
 490
 491         for (i = 0; (int)i < lcore_count; i++)
 492                 rte_service_lcore_start(ids[i]);
 493
 494         for (i = 0; i < count; i++) {
 495                 /* do 1:1 core mapping here, with each service getting
 496                  * assigned a single core by default. Adding multiple services
 497                  * should multiplex to a single core, or 1:1 if there are the
 498                  * same amount of services as service-cores
 499                  */
 500                 ret = rte_service_map_lcore_set(i, ids[lcore_iter], 1);
 501                 if (ret)
 502                         return -ENODEV;
 503
 504                 lcore_iter++;
 505                 if (lcore_iter >= lcore_count)
 506                         lcore_iter = 0;
 507
 508                 ret = rte_service_runstate_set(i, 1);
 509                 if (ret)
 510                         return -ENOEXEC;
 511         }
 512
 513         return 0;
 514 }
 515
 516 static int32_t
 517 service_update(struct rte_service_spec *service, uint32_t lcore,
 518                 uint32_t *set, uint32_t *enabled)
 519 {
 520         uint32_t i;
 521         int32_t sid = -1;
 522
 523         for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
 524                 if ((struct rte_service_spec *)&rte_services[i] == service &&
 525                                 service_valid(i)) {
 526                         sid = i;
 527                         break;
 528                 }
 529         }
 530
 531         if (sid == -1 || lcore >= RTE_MAX_LCORE)
 532                 return -EINVAL;
 533
 534         if (!lcore_states[lcore].is_service_core)
 535                 return -EINVAL;
 536
 537         uint64_t sid_mask = UINT64_C(1) << sid;
 538         if (set) {
 539                 uint64_t lcore_mapped = lcore_states[lcore].service_mask &
 540                         sid_mask;
 541
 542                 if (*set && !lcore_mapped) {
 543                         lcore_states[lcore].service_mask |= sid_mask;
 544                         rte_atomic32_inc(&rte_services[sid].num_mapped_cores);
 545                 }
 546                 if (!*set && lcore_mapped) {
 547                         lcore_states[lcore].service_mask &= ~(sid_mask);
 548                         rte_atomic32_dec(&rte_services[sid].num_mapped_cores);
 549                 }
 550         }
 551
 552         if (enabled)
 553                 *enabled = !!(lcore_states[lcore].service_mask & (sid_mask));
 554
 555         rte_smp_wmb();
 556
 557         return 0;
 558 }
 559
 560 int32_t
 561 rte_service_map_lcore_set(uint32_t id, uint32_t lcore, uint32_t enabled)
 562 {
 563         struct rte_service_spec_impl *s;
 564         SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 565         uint32_t on = enabled > 0;
 566         return service_update(&s->spec, lcore, &on, 0);
 567 }
 568
 569 int32_t
 570 rte_service_map_lcore_get(uint32_t id, uint32_t lcore)
 571 {
 572         struct rte_service_spec_impl *s;
 573         SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 574         uint32_t enabled;
 575         int ret = service_update(&s->spec, lcore, 0, &enabled);
 576         if (ret == 0)
 577                 return enabled;
 578         return ret;
 579 }
 580
 581 static void
 582 set_lcore_state(uint32_t lcore, int32_t state)
 583 {
 584         /* mark core state in hugepage backed config */
 585         struct rte_config *cfg = rte_eal_get_configuration();
 586         cfg->lcore_role[lcore] = state;
 587
 588         /* mark state in process local lcore_config */
 589         lcore_config[lcore].core_role = state;
 590
 591         /* update per-lcore optimized state tracking */
 592         lcore_states[lcore].is_service_core = (state == ROLE_SERVICE);
 593 }
 594
 595 int32_t rte_service_lcore_reset_all(void)
 596 {
 597         /* loop over cores, reset all to mask 0 */
 598         uint32_t i;
 599         for (i = 0; i < RTE_MAX_LCORE; i++) {
 600                 if (lcore_states[i].is_service_core) {
 601                         lcore_states[i].service_mask = 0;
 602                         set_lcore_state(i, ROLE_RTE);
 603                         lcore_states[i].runstate = RUNSTATE_STOPPED;
 604                 }
 605         }
 606         for (i = 0; i < RTE_SERVICE_NUM_MAX; i++)
 607                 rte_atomic32_set(&rte_services[i].num_mapped_cores, 0);
 608
 609         rte_smp_wmb();
 610
 611         return 0;
 612 }
 613
 614 int32_t
 615 rte_service_lcore_add(uint32_t lcore)
 616 {
 617         if (lcore >= RTE_MAX_LCORE)
 618                 return -EINVAL;
 619         if (lcore_states[lcore].is_service_core)
 620                 return -EALREADY;
 621
 622         set_lcore_state(lcore, ROLE_SERVICE);
 623
 624         /* ensure that after adding a core the mask and state are defaults */
 625         lcore_states[lcore].service_mask = 0;
 626         lcore_states[lcore].runstate = RUNSTATE_STOPPED;
 627
 628         rte_smp_wmb();
 629
 630         return rte_eal_wait_lcore(lcore);
 631 }
 632
 633 int32_t
 634 rte_service_lcore_del(uint32_t lcore)
 635 {
 636         if (lcore >= RTE_MAX_LCORE)
 637                 return -EINVAL;
 638
 639         struct core_state *cs = &lcore_states[lcore];
 640         if (!cs->is_service_core)
 641                 return -EINVAL;
 642
 643         if (cs->runstate != RUNSTATE_STOPPED)
 644                 return -EBUSY;
 645
 646         set_lcore_state(lcore, ROLE_RTE);
 647
 648         rte_smp_wmb();
 649         return 0;
 650 }
 651
 652 int32_t
 653 rte_service_lcore_start(uint32_t lcore)
 654 {
 655         if (lcore >= RTE_MAX_LCORE)
 656                 return -EINVAL;
 657
 658         struct core_state *cs = &lcore_states[lcore];
 659         if (!cs->is_service_core)
 660                 return -EINVAL;
 661
 662         if (cs->runstate == RUNSTATE_RUNNING)
 663                 return -EALREADY;
 664
 665         /* set core to run state first, and then launch otherwise it will
 666          * return immediately as runstate keeps it in the service poll loop
 667          */
 668         lcore_states[lcore].runstate = RUNSTATE_RUNNING;
 669
 670         int ret = rte_eal_remote_launch(rte_service_runner_func, 0, lcore);
 671         /* returns -EBUSY if the core is already launched, 0 on success */
 672         return ret;
 673 }
 674
 675 int32_t
 676 rte_service_lcore_stop(uint32_t lcore)
 677 {
 678         if (lcore >= RTE_MAX_LCORE)
 679                 return -EINVAL;
 680
 681         if (lcore_states[lcore].runstate == RUNSTATE_STOPPED)
 682                 return -EALREADY;
 683
 684         uint32_t i;
 685         uint64_t service_mask = lcore_states[lcore].service_mask;
 686         for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
 687                 int32_t enabled = service_mask & (UINT64_C(1) << i);
 688                 int32_t service_running = rte_service_runstate_get(i);
 689                 int32_t only_core = (1 ==
 690                         rte_atomic32_read(&rte_services[i].num_mapped_cores));
 691
 692                 /* if the core is mapped, and the service is running, and this
 693                  * is the only core that is mapped, the service would cease to
 694                  * run if this core stopped, so fail instead.
 695                  */
 696                 if (enabled && service_running && only_core)
 697                         return -EBUSY;
 698         }
 699
 700         lcore_states[lcore].runstate = RUNSTATE_STOPPED;
 701
 702         return 0;
 703 }
 704
 705 int32_t
 706 rte_service_attr_get(uint32_t id, uint32_t attr_id, uint32_t *attr_value)
 707 {
 708         struct rte_service_spec_impl *s;
 709         SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 710
 711         if (!attr_value)
 712                 return -EINVAL;
 713
 714         switch (attr_id) {
 715         case RTE_SERVICE_ATTR_CYCLES:
 716                 *attr_value = s->cycles_spent;
 717                 return 0;
 718         case RTE_SERVICE_ATTR_CALL_COUNT:
 719                 *attr_value = s->calls;
 720                 return 0;
 721         default:
 722                 return -EINVAL;
 723         }
 724 }
 725
 726 static void
 727 rte_service_dump_one(FILE *f, struct rte_service_spec_impl *s,
 728                      uint64_t all_cycles, uint32_t reset)
 729 {
 730         /* avoid divide by zero */
 731         if (all_cycles == 0)
 732                 all_cycles = 1;
 733
 734         int calls = 1;
 735         if (s->calls != 0)
 736                 calls = s->calls;
 737
 738         if (reset) {
 739                 s->cycles_spent = 0;
 740                 s->calls = 0;
 741                 return;
 742         }
 743
 744         fprintf(f, "  %s: stats %d\tcalls %"PRIu64"\tcycles %"
 745                         PRIu64"\tavg: %"PRIu64"\n",
 746                         s->spec.name, service_stats_enabled(s), s->calls,
 747                         s->cycles_spent, s->cycles_spent / calls);
 748 }
 749
 750 int32_t
 751 rte_service_attr_reset_all(uint32_t id)
 752 {
 753         struct rte_service_spec_impl *s;
 754         SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 755
 756         int reset = 1;
 757         rte_service_dump_one(NULL, s, 0, reset);
 758         return 0;
 759 }
 760
 761 static void
 762 service_dump_calls_per_lcore(FILE *f, uint32_t lcore, uint32_t reset)
 763 {
 764         uint32_t i;
 765         struct core_state *cs = &lcore_states[lcore];
 766
 767         fprintf(f, "%02d\t", lcore);
 768         for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
 769                 if (!service_valid(i))
 770                         continue;
 771                 fprintf(f, "%"PRIu64"\t", cs->calls_per_service[i]);
 772                 if (reset)
 773                         cs->calls_per_service[i] = 0;
 774         }
 775         fprintf(f, "\n");
 776 }
 777
 778 int32_t rte_service_dump(FILE *f, uint32_t id)
 779 {
 780         uint32_t i;
 781         int print_one = (id != UINT32_MAX);
 782
 783         uint64_t total_cycles = 0;
 784
 785         for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
 786                 if (!service_valid(i))
 787                         continue;
 788                 total_cycles += rte_services[i].cycles_spent;
 789         }
 790
 791         /* print only the specified service */
 792         if (print_one) {
 793                 struct rte_service_spec_impl *s;
 794                 SERVICE_VALID_GET_OR_ERR_RET(id, s, -EINVAL);
 795                 fprintf(f, "Service %s Summary\n", s->spec.name);
 796                 uint32_t reset = 0;
 797                 rte_service_dump_one(f, s, total_cycles, reset);
 798                 return 0;
 799         }
 800
 801         /* print all services, as UINT32_MAX was passed as id */
 802         fprintf(f, "Services Summary\n");
 803         for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
 804                 if (!service_valid(i))
 805                         continue;
 806                 uint32_t reset = 0;
 807                 rte_service_dump_one(f, &rte_services[i], total_cycles, reset);
 808         }
 809
 810         fprintf(f, "Service Cores Summary\n");
 811         for (i = 0; i < RTE_MAX_LCORE; i++) {
 812                 if (lcore_config[i].core_role != ROLE_SERVICE)
 813                         continue;
 814
 815                 uint32_t reset = 0;
 816                 service_dump_calls_per_lcore(f, i, reset);
 817         }
 818
 819         return 0;
 820 }