src/simix/smx_host.c

   1 /* Copyright (c) 2007-2015. The SimGrid Team.
   2  * All rights reserved.                                                     */
   3
   4 /* This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the license (GNU LGPL) which comes with this package. */
   6
   7 #include "smx_private.h"
   8 #include "xbt/sysdep.h"
   9 #include "xbt/log.h"
  10 #include "xbt/dict.h"
  11 #include "mc/mc.h"
  12 #include "src/mc/mc_replay.h"
  13
  14 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_host, simix,
  15                                 "SIMIX hosts");
  16
  17 static void SIMIX_execution_finish(smx_synchro_t synchro);
  18
  19 /**
  20  * \brief Internal function to create a SIMIX host.
  21  * \param name name of the host to create
  22  */
  23 void SIMIX_host_create(sg_host_t host) // FIXME: braindead prototype. Take sg_host as parameter
  24 {
  25   smx_host_priv_t smx_host = xbt_new0(s_smx_host_priv_t, 1);
  26   s_smx_process_t proc;
  27
  28   /* Host structure */
  29   smx_host->process_list =
  30       xbt_swag_new(xbt_swag_offset(proc, host_proc_hookup));
  31
  32   /* Update global variables */
  33   sg_host_simix_set(host, smx_host);
  34 }
  35
  36 /**
  37  * \brief Start the host if it is off
  38  *
  39  */
  40 void SIMIX_host_on(sg_host_t h)
  41 {
  42   smx_host_priv_t host = sg_host_simix(h);
  43
  44   xbt_assert((host != NULL), "Invalid parameters");
  45
  46   if (surf_host_get_state(surf_host_resource_priv(h))==SURF_RESOURCE_OFF) {
  47     surf_host_set_state(surf_host_resource_priv(h), SURF_RESOURCE_ON);
  48
  49     unsigned int cpt;
  50     smx_process_arg_t arg;
  51     xbt_dynar_foreach(host->boot_processes,cpt,arg) {
  52
  53       char** argv = xbt_new(char*, arg->argc);
  54       for (int i=0; i<arg->argc; i++)
  55         argv[i] = xbt_strdup(arg->argv[i]);
  56
  57       XBT_DEBUG("Booting Process %s(%s) right now", arg->argv[0], arg->hostname);
  58       if (simix_global->create_process_function) {
  59         simix_global->create_process_function(argv[0],
  60                                               arg->code,
  61                                               NULL,
  62                                               arg->hostname,
  63                                               arg->kill_time,
  64                                               arg->argc,
  65                                               argv,
  66                                               arg->properties,
  67                                               arg->auto_restart,
  68                                               NULL);
  69       } else {
  70         simcall_process_create(arg->argv[0],
  71                                arg->code,
  72                                NULL,
  73                                arg->hostname,
  74                                arg->kill_time,
  75                                arg->argc,
  76                                argv,
  77                                arg->properties,
  78                                arg->auto_restart);
  79       }
  80     }
  81   }
  82 }
  83
  84 void simcall_HANDLER_host_off(smx_simcall_t simcall, sg_host_t h)
  85 {
  86  SIMIX_host_off(h, simcall->issuer);
  87 }
  88
  89 /**
  90  * \brief Stop the host if it is on
  91  *
  92  */
  93 void SIMIX_host_off(sg_host_t h, smx_process_t issuer)
  94 {
  95   smx_host_priv_t host = sg_host_simix(h);
  96
  97   xbt_assert((host != NULL), "Invalid parameters");
  98
  99   if (surf_host_get_state(surf_host_resource_priv(h))==SURF_RESOURCE_ON) {
 100         surf_host_set_state(surf_host_resource_priv(h), SURF_RESOURCE_OFF);
 101
 102     /* Clean Simulator data */
 103     if (xbt_swag_size(host->process_list) != 0) {
 104       smx_process_t process = NULL;
 105       xbt_swag_foreach(process, host->process_list) {
 106         SIMIX_process_kill(process, issuer);
 107         XBT_DEBUG("Killing %s on %s by %s", process->name,  sg_host_get_name(process->host), issuer->name);
 108       }
 109     }
 110   }
 111 }
 112
 113 /**
 114  * \brief Internal function to destroy a SIMIX host.
 115  *
 116  * \param h the host to destroy (a sg_host_t)
 117  */
 118 void SIMIX_host_destroy(void *h)
 119 {
 120   smx_host_priv_t host = (smx_host_priv_t) h;
 121
 122   xbt_assert((host != NULL), "Invalid parameters");
 123
 124   /* Clean Simulator data */
 125   if (xbt_swag_size(host->process_list) != 0) {
 126     char *msg = xbt_strdup("Shutting down host, but it's not empty:");
 127     char *tmp;
 128     smx_process_t process = NULL;
 129
 130     xbt_swag_foreach(process, host->process_list) {
 131       tmp = bprintf("%s\n\t%s", msg, process->name);
 132       free(msg);
 133       msg = tmp;
 134     }
 135     SIMIX_display_process_status();
 136     THROWF(arg_error, 0, "%s", msg);
 137   }
 138   xbt_dynar_free(&host->auto_restart_processes);
 139   xbt_dynar_free(&host->boot_processes);
 140   xbt_swag_free(host->process_list);
 141
 142   /* Clean host structure */
 143   free(host);
 144   return;
 145 }
 146
 147 sg_host_t SIMIX_host_self(void)
 148 {
 149   smx_process_t process = SIMIX_process_self();
 150   return (process == NULL) ? NULL : SIMIX_process_get_host(process);
 151 }
 152
 153 /* needs to be public and without simcall because it is called
 154    by exceptions and logging events */
 155 const char* SIMIX_host_self_get_name(void)
 156 {
 157   sg_host_t host = SIMIX_host_self();
 158   if (host == NULL || SIMIX_process_self() == simix_global->maestro_process)
 159     return "";
 160
 161   return SIMIX_host_get_name(host);
 162 }
 163
 164 xbt_dict_t SIMIX_host_get_properties(sg_host_t host){
 165   return surf_host_get_properties(surf_host_resource_priv(host));
 166 }
 167
 168
 169 xbt_swag_t SIMIX_host_get_process_list(sg_host_t host){
 170   smx_host_priv_t host_priv = sg_host_simix(host);
 171
 172   return host_priv->process_list;
 173 }
 174
 175
 176 double SIMIX_host_get_current_power_peak(sg_host_t host) {
 177           return surf_host_get_current_power_peak(host);
 178 }
 179
 180 double SIMIX_host_get_power_peak_at(sg_host_t host, int pstate_index) {
 181           return surf_host_get_power_peak_at(host, pstate_index);
 182 }
 183
 184 void SIMIX_host_set_pstate(sg_host_t host, int pstate_index) {
 185           surf_host_set_pstate(host, pstate_index);
 186 }
 187 double SIMIX_host_get_wattmin_at(sg_host_t host,int pstate) {
 188           return surf_host_get_wattmin_at(host,pstate);
 189 }
 190 double SIMIX_host_get_wattmax_at(sg_host_t host,int pstate) {
 191           return surf_host_get_wattmax_at(host,pstate);
 192 }
 193
 194 void _SIMIX_host_free_process_arg(void *data)
 195 {
 196   smx_process_arg_t arg = *(void**)data;
 197   int i;
 198   for (i = 0; i < arg->argc; i++)
 199     xbt_free(arg->argv[i]);
 200   xbt_free(arg->argv);
 201   xbt_free(arg->name);
 202   xbt_free(arg);
 203 }
 204 /**
 205  * \brief Add a process to the list of the processes that the host will restart when it comes back
 206  * This function add a process to the list of the processes that will be restarted when the host comes
 207  * back. It is expected that this function is called when the host is down.
 208  * The processes will only be restarted once, meaning that you will have to register the process
 209  * again to restart the process again.
 210  */
 211 void SIMIX_host_add_auto_restart_process(sg_host_t host,
 212                                          const char *name,
 213                                          xbt_main_func_t code,
 214                                          void *data,
 215                                          const char *hostname,
 216                                          double kill_time,
 217                                          int argc, char **argv,
 218                                          xbt_dict_t properties,
 219                                          int auto_restart)
 220 {
 221   if (!sg_host_simix(host)->auto_restart_processes) {
 222     sg_host_simix(host)->auto_restart_processes = xbt_dynar_new(sizeof(smx_process_arg_t),_SIMIX_host_free_process_arg);
 223   }
 224   smx_process_arg_t arg = xbt_new(s_smx_process_arg_t,1);
 225   arg->name = xbt_strdup(name);
 226   arg->code = code;
 227   arg->data = data;
 228   arg->hostname = hostname;
 229   arg->kill_time = kill_time;
 230   arg->argc = argc;
 231
 232   arg->argv = xbt_new(char*,argc + 1);
 233
 234   int i;
 235   for (i = 0; i < argc; i++) {
 236     arg->argv[i] = xbt_strdup(argv[i]);
 237   }
 238   arg->argv[argc] = NULL;
 239
 240   arg->properties = properties;
 241   arg->auto_restart = auto_restart;
 242
 243   if( sg_host_get_state(host) == SURF_RESOURCE_OFF
 244       && !xbt_dict_get_or_null(watched_hosts_lib,sg_host_get_name(host))){
 245     xbt_dict_set(watched_hosts_lib,sg_host_get_name(host),host,NULL);
 246     XBT_DEBUG("Have pushed host %s to watched_hosts_lib because state == SURF_RESOURCE_OFF",sg_host_get_name(host));
 247   }
 248   xbt_dynar_push_as(sg_host_simix(host)->auto_restart_processes,smx_process_arg_t,arg);
 249 }
 250 /**
 251  * \brief Restart the list of processes that have been registered to the host
 252  */
 253 void SIMIX_host_restart_processes(sg_host_t host)
 254 {
 255   unsigned int cpt;
 256   smx_process_arg_t arg;
 257   xbt_dynar_t process_list = sg_host_simix(host)->auto_restart_processes;
 258   if (!process_list)
 259     return;
 260
 261   xbt_dynar_foreach (process_list, cpt, arg) {
 262
 263     XBT_DEBUG("Restarting Process %s(%s) right now", arg->argv[0], arg->hostname);
 264     if (simix_global->create_process_function) {
 265       simix_global->create_process_function(arg->argv[0],
 266                                             arg->code,
 267                                             NULL,
 268                                             arg->hostname,
 269                                             arg->kill_time,
 270                                             arg->argc,
 271                                             arg->argv,
 272                                             arg->properties,
 273                                             arg->auto_restart,
 274                                             NULL);
 275     } else {
 276       simcall_process_create(arg->argv[0],
 277                              arg->code,
 278                              NULL,
 279                              arg->hostname,
 280                              arg->kill_time,
 281                              arg->argc,
 282                              arg->argv,
 283                              arg->properties,
 284                              arg->auto_restart);
 285
 286     }
 287     /* arg->argv is used by the process created above.  Hide it to
 288      * _SIMIX_host_free_process_arg() which is called by xbt_dynar_reset()
 289      * below. */
 290     arg->argc = 0;
 291     arg->argv = NULL;
 292   }
 293   xbt_dynar_reset(process_list);
 294 }
 295
 296 void SIMIX_host_autorestart(sg_host_t host)
 297 {
 298   if(simix_global->autorestart)
 299     simix_global->autorestart(host);
 300   else
 301     xbt_die("No function for simix_global->autorestart");
 302 }
 303 smx_synchro_t simcall_HANDLER_process_execute(smx_simcall_t simcall,
 304                 const char* name, double flops_amount, double priority, double bound, unsigned long affinity_mask) {
 305         return SIMIX_process_execute(simcall->issuer, name,flops_amount,priority,bound,affinity_mask);
 306 }
 307 smx_synchro_t SIMIX_process_execute(smx_process_t issuer, const char *name,
 308      double flops_amount, double priority, double bound, unsigned long affinity_mask){
 309
 310   /* alloc structures and initialize */
 311   smx_synchro_t synchro = xbt_mallocator_get(simix_global->synchro_mallocator);
 312   synchro->type = SIMIX_SYNC_EXECUTE;
 313   synchro->name = xbt_strdup(name);
 314   synchro->state = SIMIX_RUNNING;
 315   synchro->execution.host = issuer->host;
 316   synchro->category = NULL;
 317
 318   /* set surf's action */
 319   if (!MC_is_active() && !MC_record_replay_is_active()) {
 320
 321     synchro->execution.surf_exec = surf_host_execute(issuer->host, flops_amount);
 322     surf_action_set_data(synchro->execution.surf_exec, synchro);
 323     surf_action_set_priority(synchro->execution.surf_exec, priority);
 324
 325     /* Note (hypervisor): for multicore, the bound value being passed to the
 326      * surf layer should not be zero (i.e., unlimited). It should be the
 327      * capacity of a CPU core. */
 328     if (bound == 0)
 329       surf_cpu_action_set_bound(synchro->execution.surf_exec, sg_host_get_speed(issuer->host));
 330     else
 331       surf_cpu_action_set_bound(synchro->execution.surf_exec, bound);
 332
 333     if (affinity_mask != 0) {
 334       /* just a double check to confirm that this host is the host where this task is running. */
 335       xbt_assert(synchro->execution.host == issuer->host);
 336       surf_cpu_action_set_affinity(synchro->execution.surf_exec, issuer->host, affinity_mask);
 337     }
 338   }
 339
 340   XBT_DEBUG("Create execute synchro %p: %s", synchro, synchro->name);
 341
 342   return synchro;
 343 }
 344
 345 smx_synchro_t SIMIX_process_parallel_execute(const char *name,
 346     int host_nb, sg_host_t *host_list,
 347     double *flops_amount, double *bytes_amount,
 348     double amount, double rate){
 349
 350   sg_host_t*host_list_cpy = NULL;
 351   int i;
 352
 353   /* alloc structures and initialize */
 354   smx_synchro_t synchro = xbt_mallocator_get(simix_global->synchro_mallocator);
 355   synchro->type = SIMIX_SYNC_PARALLEL_EXECUTE;
 356   synchro->name = xbt_strdup(name);
 357   synchro->state = SIMIX_RUNNING;
 358   synchro->execution.host = NULL; /* FIXME: do we need the list of hosts? */
 359   synchro->category = NULL;
 360
 361   /* set surf's synchro */
 362   host_list_cpy = xbt_new0(sg_host_t, host_nb);
 363   for (i = 0; i < host_nb; i++)
 364     host_list_cpy[i] = host_list[i];
 365
 366
 367   /* FIXME: what happens if host_list contains VMs and PMs. If
 368    * execute_parallel_task() does not change the state of the model, we can mix
 369    * them. */
 370   surf_model_t ws_model = surf_resource_model(host_list[0], SURF_HOST_LEVEL);
 371   for (i = 1; i < host_nb; i++) {
 372     surf_model_t ws_model_tmp = surf_resource_model(host_list[i], SURF_HOST_LEVEL);
 373     if (ws_model_tmp != ws_model) {
 374       XBT_CRITICAL("mixing VMs and PMs is not supported");
 375       DIE_IMPOSSIBLE;
 376     }
 377   }
 378
 379   /* set surf's synchro */
 380   if (!MC_is_active() && !MC_record_replay_is_active()) {
 381     synchro->execution.surf_exec =
 382       surf_host_model_execute_parallel_task(surf_host_model,
 383                   host_nb, host_list_cpy, flops_amount, bytes_amount, rate);
 384
 385     surf_action_set_data(synchro->execution.surf_exec, synchro);
 386   }
 387   XBT_DEBUG("Create parallel execute synchro %p", synchro);
 388
 389   return synchro;
 390 }
 391
 392 void SIMIX_process_execution_destroy(smx_synchro_t synchro){
 393   XBT_DEBUG("Destroy synchro %p", synchro);
 394
 395   if (synchro->execution.surf_exec) {
 396     surf_action_unref(synchro->execution.surf_exec);
 397     synchro->execution.surf_exec = NULL;
 398   }
 399   xbt_free(synchro->name);
 400   xbt_mallocator_release(simix_global->synchro_mallocator, synchro);
 401 }
 402
 403 void SIMIX_process_execution_cancel(smx_synchro_t synchro){
 404   XBT_DEBUG("Cancel synchro %p", synchro);
 405
 406   if (synchro->execution.surf_exec)
 407     surf_action_cancel(synchro->execution.surf_exec);
 408 }
 409
 410 double SIMIX_process_execution_get_remains(smx_synchro_t synchro){
 411   double result = 0.0;
 412
 413   if (synchro->state == SIMIX_RUNNING)
 414     result = surf_action_get_remains(synchro->execution.surf_exec);
 415
 416   return result;
 417 }
 418
 419 e_smx_state_t SIMIX_process_execution_get_state(smx_synchro_t synchro){
 420   return synchro->state;
 421 }
 422
 423 void SIMIX_process_execution_set_priority(smx_synchro_t synchro, double priority){
 424
 425   if(synchro->execution.surf_exec)
 426         surf_action_set_priority(synchro->execution.surf_exec, priority);
 427 }
 428
 429 void SIMIX_process_execution_set_bound(smx_synchro_t synchro, double bound){
 430
 431   if(synchro->execution.surf_exec)
 432         surf_cpu_action_set_bound(synchro->execution.surf_exec, bound);
 433 }
 434
 435 void SIMIX_process_execution_set_affinity(smx_synchro_t synchro, sg_host_t host, unsigned long mask){
 436   xbt_assert(synchro->type == SIMIX_SYNC_EXECUTE);
 437
 438   if (synchro->execution.surf_exec) {
 439     /* just a double check to confirm that this host is the host where this task is running. */
 440     xbt_assert(synchro->execution.host == host);
 441     surf_cpu_action_set_affinity(synchro->execution.surf_exec, host, mask);
 442   }
 443 }
 444
 445 void simcall_HANDLER_process_execution_wait(smx_simcall_t simcall, smx_synchro_t synchro){
 446
 447   XBT_DEBUG("Wait for execution of synchro %p, state %d", synchro, (int)synchro->state);
 448
 449   /* Associate this simcall to the synchro */
 450   xbt_fifo_push(synchro->simcalls, simcall);
 451   simcall->issuer->waiting_synchro = synchro;
 452
 453   /* set surf's synchro */
 454   if (MC_is_active() || MC_record_replay_is_active()) {
 455     synchro->state = SIMIX_DONE;
 456     SIMIX_execution_finish(synchro);
 457     return;
 458   }
 459
 460   /* If the synchro is already finished then perform the error handling */
 461   if (synchro->state != SIMIX_RUNNING)
 462     SIMIX_execution_finish(synchro);
 463 }
 464
 465 void SIMIX_host_execution_suspend(smx_synchro_t synchro)
 466 {
 467   if(synchro->execution.surf_exec)
 468     surf_action_suspend(synchro->execution.surf_exec);
 469 }
 470
 471 void SIMIX_host_execution_resume(smx_synchro_t synchro)
 472 {
 473   if(synchro->execution.surf_exec)
 474     surf_action_resume(synchro->execution.surf_exec);
 475 }
 476
 477 void SIMIX_execution_finish(smx_synchro_t synchro)
 478 {
 479   xbt_fifo_item_t item;
 480   smx_simcall_t simcall;
 481
 482   xbt_fifo_foreach(synchro->simcalls, item, simcall, smx_simcall_t) {
 483
 484     switch (synchro->state) {
 485
 486       case SIMIX_DONE:
 487         /* do nothing, synchro done */
 488         XBT_DEBUG("SIMIX_execution_finished: execution successful");
 489         break;
 490
 491       case SIMIX_FAILED:
 492         XBT_DEBUG("SIMIX_execution_finished: host '%s' failed", sg_host_get_name(simcall->issuer->host));
 493         simcall->issuer->context->iwannadie = 1;
 494         SMX_EXCEPTION(simcall->issuer, host_error, 0, "Host failed");
 495         break;
 496
 497       case SIMIX_CANCELED:
 498         XBT_DEBUG("SIMIX_execution_finished: execution canceled");
 499         SMX_EXCEPTION(simcall->issuer, cancel_error, 0, "Canceled");
 500         break;
 501
 502       default:
 503         xbt_die("Internal error in SIMIX_execution_finish: unexpected synchro state %d",
 504             (int)synchro->state);
 505     }
 506     /* check if the host is down */
 507     if (surf_host_get_state(surf_host_resource_priv(simcall->issuer->host)) != SURF_RESOURCE_ON) {
 508       simcall->issuer->context->iwannadie = 1;
 509     }
 510
 511     simcall->issuer->waiting_synchro =    NULL;
 512     simcall_process_execution_wait__set__result(simcall, synchro->state);
 513     SIMIX_simcall_answer(simcall);
 514   }
 515
 516   /* We no longer need it */
 517   SIMIX_process_execution_destroy(synchro);
 518 }
 519
 520
 521 void SIMIX_post_host_execute(smx_synchro_t synchro)
 522 {
 523   if (synchro->type == SIMIX_SYNC_EXECUTE && /* FIMXE: handle resource failure
 524                                                * for parallel tasks too */
 525       surf_host_get_state(surf_host_resource_priv(synchro->execution.host)) == SURF_RESOURCE_OFF) {
 526     /* If the host running the synchro failed, notice it so that the asking
 527      * process can be killed if it runs on that host itself */
 528     synchro->state = SIMIX_FAILED;
 529   } else if (surf_action_get_state(synchro->execution.surf_exec) == SURF_ACTION_FAILED) {
 530     /* If the host running the synchro didn't fail, then the synchro was
 531      * canceled */
 532     synchro->state = SIMIX_CANCELED;
 533   } else {
 534     synchro->state = SIMIX_DONE;
 535   }
 536
 537   if (synchro->execution.surf_exec) {
 538     surf_action_unref(synchro->execution.surf_exec);
 539     synchro->execution.surf_exec = NULL;
 540   }
 541
 542   /* If there are simcalls associated with the synchro, then answer them */
 543   if (xbt_fifo_size(synchro->simcalls)) {
 544     SIMIX_execution_finish(synchro);
 545   }
 546 }
 547
 548
 549 void SIMIX_set_category(smx_synchro_t synchro, const char *category)
 550 {
 551   if (synchro->state != SIMIX_RUNNING) return;
 552   if (synchro->type == SIMIX_SYNC_EXECUTE){
 553     surf_action_set_category(synchro->execution.surf_exec, category);
 554   }else if (synchro->type == SIMIX_SYNC_COMMUNICATE){
 555     surf_action_set_category(synchro->comm.surf_comm, category);
 556   }
 557 }
 558
 559 /**
 560  * \brief Function to get the parameters of the given the SIMIX host.
 561  *
 562  * \param host the host to get_phys_host (a sg_host_t)
 563  * \param param the parameter object space to be overwritten (a ws_params_t)
 564  */
 565 void SIMIX_host_get_params(sg_host_t ind_vm, vm_params_t params)
 566 {
 567   /* jump to ws_get_params(). */
 568   surf_host_get_params(ind_vm, params);
 569 }
 570
 571 void SIMIX_host_set_params(sg_host_t ind_vm, vm_params_t params)
 572 {
 573   /* jump to ws_set_params(). */
 574   surf_host_set_params(ind_vm, params);
 575 }
 576
 577 xbt_dict_t SIMIX_host_get_mounted_storage_list(sg_host_t host){
 578   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 579
 580   return surf_host_get_mounted_storage_list(host);
 581 }
 582
 583 xbt_dynar_t SIMIX_host_get_attached_storage_list(sg_host_t host){
 584   xbt_assert((host != NULL), "Invalid parameters (simix host is NULL)");
 585
 586   return surf_host_get_attached_storage_list(host);
 587 }