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