src/simix/smx_host.cpp

   1 /* Copyright (c) 2007-2016. The SimGrid Team. All rights reserved.          */
   2
   3 /* This program is free software; you can redistribute it and/or modify it
   4  * under the terms of the license (GNU LGPL) which comes with this package. */
   5
   6 #include "mc/mc.h"
   7 #include "smx_private.h"
   8 #include "src/kernel/activity/CommImpl.hpp"
   9 #include "src/mc/mc_replay.h"
  10 #include "src/plugins/vm/VirtualMachineImpl.hpp"
  11 #include "xbt/ex.hpp"
  12
  13 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_host, simix, "SIMIX hosts");
  14
  15 namespace simgrid {
  16   namespace simix {
  17     simgrid::xbt::Extension<simgrid::s4u::Host, Host> Host::EXTENSION_ID;
  18
  19     Host::Host()
  20     {
  21       if (not Host::EXTENSION_ID.valid())
  22         Host::EXTENSION_ID = s4u::Host::extension_create<simix::Host>();
  23
  24       simgrid::simix::ActorImpl act;
  25       process_list = xbt_swag_new(xbt_swag_offset(act, host_proc_hookup));
  26     }
  27
  28     Host::~Host()
  29     {
  30       /* Clean Simulator data */
  31       if (xbt_swag_size(process_list) != 0) {
  32         char *msg = xbt_strdup("Shutting down host, but it's not empty:");
  33         char *tmp;
  34         smx_actor_t process = nullptr;
  35
  36         xbt_swag_foreach(process, process_list) {
  37           tmp = bprintf("%s\n\t%s", msg, process->name.c_str());
  38           free(msg);
  39           msg = tmp;
  40         }
  41         SIMIX_display_process_status();
  42         THROWF(arg_error, 0, "%s", msg);
  43       }
  44       for (auto arg : auto_restart_processes)
  45         delete arg;
  46       auto_restart_processes.clear();
  47       for (auto arg : boot_processes)
  48         delete arg;
  49       boot_processes.clear();
  50       xbt_swag_free(process_list);
  51     }
  52
  53     /** Re-starts all the actors that are marked as restartable.
  54      *
  55      * Weird things will happen if you turn on an host that is already on. S4U is fool-proof, not this.
  56      */
  57     void Host::turnOn()
  58     {
  59       for (auto arg : boot_processes) {
  60         XBT_DEBUG("Booting Process %s(%s) right now", arg->name.c_str(), arg->host->cname());
  61         smx_actor_t actor = simix_global->create_process_function(arg->name.c_str(), arg->code, nullptr, arg->host,
  62                                                                   arg->properties, nullptr);
  63         if (arg->kill_time >= 0)
  64           simcall_process_set_kill_time(actor, arg->kill_time);
  65         if (arg->auto_restart)
  66           simcall_process_auto_restart_set(actor, arg->auto_restart);
  67       }
  68     }
  69
  70 }} // namespaces
  71
  72 /** @brief Stop the host if it is on */
  73 void SIMIX_host_off(sg_host_t h, smx_actor_t issuer)
  74 {
  75   simgrid::simix::Host* host = h->extension<simgrid::simix::Host>();
  76
  77   xbt_assert((host != nullptr), "Invalid parameters");
  78
  79   if (h->isOn()) {
  80     h->pimpl_cpu->turnOff();
  81
  82     /* Clean Simulator data */
  83     if (xbt_swag_size(host->process_list) != 0) {
  84       smx_actor_t process = nullptr;
  85       xbt_swag_foreach(process, host->process_list) {
  86         SIMIX_process_kill(process, issuer);
  87         XBT_DEBUG("Killing %s@%s on behalf of %s", process->cname(), process->host->cname(), issuer->cname());
  88       }
  89     }
  90   } else {
  91     XBT_INFO("Host %s is already off", h->cname());
  92   }
  93 }
  94
  95 sg_host_t sg_host_self()
  96 {
  97   smx_actor_t process = SIMIX_process_self();
  98   return (process == nullptr) ? nullptr : process->host;
  99 }
 100
 101 /* needs to be public and without simcall for exceptions and logging events */
 102 const char* sg_host_self_get_name()
 103 {
 104   sg_host_t host = sg_host_self();
 105   if (host == nullptr || SIMIX_process_self() == simix_global->maestro_process)
 106     return "";
 107
 108   return host->cname();
 109 }
 110
 111 /**
 112  * \brief Add a process to the list of the processes that the host will restart when it comes back
 113  * This function add a process to the list of the processes that will be restarted when the host comes
 114  * back. It is expected that this function is called when the host is down.
 115  * The processes will only be restarted once, meaning that you will have to register the process
 116  * again to restart the process again.
 117  */
 118 void SIMIX_host_add_auto_restart_process(
 119   sg_host_t host, const char *name, std::function<void()> code,
 120   void* data, double kill_time, xbt_dict_t properties, int auto_restart)
 121 {
 122   smx_process_arg_t arg = new simgrid::simix::ProcessArg();
 123   arg->name = name;
 124   arg->code = std::move(code);
 125   arg->data = data;
 126   arg->host = host;
 127   arg->kill_time = kill_time;
 128   arg->properties = properties;
 129   arg->auto_restart = auto_restart;
 130
 131   if (host->isOff() && not xbt_dict_get_or_null(watched_hosts_lib, host->cname())) {
 132     xbt_dict_set(watched_hosts_lib, host->cname(), host, nullptr);
 133     XBT_DEBUG("Push host %s to watched_hosts_lib because state == SURF_RESOURCE_OFF", host->cname());
 134   }
 135   host->extension<simgrid::simix::Host>()->auto_restart_processes.push_back(arg);
 136 }
 137 /** @brief Restart the list of processes that have been registered to the host */
 138 void SIMIX_host_autorestart(sg_host_t host)
 139 {
 140   std::vector<simgrid::simix::ProcessArg*> process_list =
 141       host->extension<simgrid::simix::Host>()->auto_restart_processes;
 142
 143   for (auto arg : process_list) {
 144     XBT_DEBUG("Restarting Process %s@%s right now", arg->name.c_str(), arg->host->cname());
 145     smx_actor_t actor = simix_global->create_process_function(arg->name.c_str(), arg->code, nullptr, arg->host,
 146                                                               arg->properties, nullptr);
 147     if (arg->kill_time >= 0)
 148       simcall_process_set_kill_time(actor, arg->kill_time);
 149     if (arg->auto_restart)
 150       simcall_process_auto_restart_set(actor, arg->auto_restart);
 151   }
 152   process_list.clear();
 153 }
 154
 155 boost::intrusive_ptr<simgrid::kernel::activity::ExecImpl> simcall_HANDLER_execution_start(smx_simcall_t simcall,
 156                                                                                           const char* name,
 157                                                                                           double flops_amount,
 158                                                                                           double priority, double bound)
 159 {
 160   return SIMIX_execution_start(simcall->issuer, name,flops_amount,priority,bound);
 161 }
 162
 163 boost::intrusive_ptr<simgrid::kernel::activity::ExecImpl>
 164 SIMIX_execution_start(smx_actor_t issuer, const char* name, double flops_amount, double priority, double bound)
 165 {
 166
 167   /* alloc structures and initialize */
 168   simgrid::kernel::activity::ExecImplPtr exec =
 169       simgrid::kernel::activity::ExecImplPtr(new simgrid::kernel::activity::ExecImpl(name, issuer->host));
 170
 171   /* set surf's action */
 172   if (not MC_is_active() && not MC_record_replay_is_active()) {
 173
 174     exec->surf_exec = issuer->host->pimpl_cpu->execution_start(flops_amount);
 175     exec->surf_exec->setData(exec.get());
 176     exec->surf_exec->setSharingWeight(priority);
 177
 178     if (bound > 0)
 179       static_cast<simgrid::surf::CpuAction*>(exec->surf_exec)->setBound(bound);
 180   }
 181
 182   XBT_DEBUG("Create execute synchro %p: %s", exec.get(), exec->name.c_str());
 183
 184   return exec;
 185 }
 186
 187 boost::intrusive_ptr<simgrid::kernel::activity::ExecImpl>
 188 SIMIX_execution_parallel_start(const char* name, int host_nb, sg_host_t* host_list, double* flops_amount,
 189                                double* bytes_amount, double amount, double rate, double timeout)
 190 {
 191
 192   /* alloc structures and initialize */
 193   simgrid::kernel::activity::ExecImplPtr exec =
 194       simgrid::kernel::activity::ExecImplPtr(new simgrid::kernel::activity::ExecImpl(name, nullptr));
 195
 196   /* set surf's synchro */
 197   sg_host_t *host_list_cpy = xbt_new0(sg_host_t, host_nb);
 198   for (int i = 0; i < host_nb; i++)
 199     host_list_cpy[i] = host_list[i];
 200
 201   /* Check that we are not mixing VMs and PMs in the parallel task */
 202   bool is_a_vm = (nullptr != dynamic_cast<simgrid::s4u::VirtualMachine*>(host_list[0]));
 203   for (int i = 1; i < host_nb; i++) {
 204     bool tmp_is_a_vm = (nullptr != dynamic_cast<simgrid::s4u::VirtualMachine*>(host_list[i]));
 205     xbt_assert(is_a_vm == tmp_is_a_vm, "parallel_execute: mixing VMs and PMs is not supported (yet).");
 206   }
 207
 208   /* set surf's synchro */
 209   if (not MC_is_active() && not MC_record_replay_is_active()) {
 210     exec->surf_exec = surf_host_model->executeParallelTask(host_nb, host_list_cpy, flops_amount, bytes_amount, rate);
 211     exec->surf_exec->setData(exec.get());
 212     if (timeout > 0) {
 213       exec->timeoutDetector = host_list[0]->pimpl_cpu->sleep(timeout);
 214       exec->timeoutDetector->setData(exec.get());
 215     }
 216   }
 217   XBT_DEBUG("Create parallel execute synchro %p", exec.get());
 218
 219   return exec;
 220 }
 221
 222 void SIMIX_execution_cancel(smx_activity_t synchro)
 223 {
 224   XBT_DEBUG("Cancel synchro %p", synchro.get());
 225   simgrid::kernel::activity::ExecImplPtr exec =
 226       boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(synchro);
 227
 228   if (exec->surf_exec)
 229     exec->surf_exec->cancel();
 230 }
 231
 232 void SIMIX_execution_set_priority(smx_activity_t synchro, double priority)
 233 {
 234   simgrid::kernel::activity::ExecImplPtr exec =
 235       boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(synchro);
 236   if(exec->surf_exec)
 237     exec->surf_exec->setSharingWeight(priority);
 238 }
 239
 240 void SIMIX_execution_set_bound(smx_activity_t synchro, double bound)
 241 {
 242   simgrid::kernel::activity::ExecImplPtr exec =
 243       boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(synchro);
 244   if(exec->surf_exec)
 245     static_cast<simgrid::surf::CpuAction*>(exec->surf_exec)->setBound(bound);
 246 }
 247
 248 void simcall_HANDLER_execution_wait(smx_simcall_t simcall, smx_activity_t synchro)
 249 {
 250   simgrid::kernel::activity::ExecImplPtr exec =
 251       boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(synchro);
 252   XBT_DEBUG("Wait for execution of synchro %p, state %d", synchro.get(), (int)synchro->state);
 253
 254   /* Associate this simcall to the synchro */
 255   synchro->simcalls.push_back(simcall);
 256   simcall->issuer->waiting_synchro = synchro;
 257
 258   /* set surf's synchro */
 259   if (MC_is_active() || MC_record_replay_is_active()) {
 260     synchro->state = SIMIX_DONE;
 261     SIMIX_execution_finish(exec);
 262     return;
 263   }
 264
 265   /* If the synchro is already finished then perform the error handling */
 266   if (synchro->state != SIMIX_RUNNING)
 267     SIMIX_execution_finish(exec);
 268 }
 269
 270 void SIMIX_execution_finish(simgrid::kernel::activity::ExecImplPtr exec)
 271 {
 272   for (smx_simcall_t simcall : exec->simcalls) {
 273     switch (exec->state) {
 274
 275       case SIMIX_DONE:
 276         /* do nothing, synchro done */
 277         XBT_DEBUG("SIMIX_execution_finished: execution successful");
 278         break;
 279
 280       case SIMIX_FAILED:
 281         XBT_DEBUG("SIMIX_execution_finished: host '%s' failed", simcall->issuer->host->cname());
 282         simcall->issuer->context->iwannadie = 1;
 283         SMX_EXCEPTION(simcall->issuer, host_error, 0, "Host failed");
 284         break;
 285
 286       case SIMIX_CANCELED:
 287         XBT_DEBUG("SIMIX_execution_finished: execution canceled");
 288         SMX_EXCEPTION(simcall->issuer, cancel_error, 0, "Canceled");
 289         break;
 290
 291       case SIMIX_TIMEOUT:
 292         XBT_DEBUG("SIMIX_execution_finished: execution timeouted");
 293         SMX_EXCEPTION(simcall->issuer, timeout_error, 0, "Timeouted");
 294         break;
 295
 296       default:
 297         xbt_die("Internal error in SIMIX_execution_finish: unexpected synchro state %d",
 298             (int)exec->state);
 299     }
 300     /* Fail the process if the host is down */
 301     if (simcall->issuer->host->isOff())
 302       simcall->issuer->context->iwannadie = 1;
 303
 304     simcall->issuer->waiting_synchro = nullptr;
 305     simcall_execution_wait__set__result(simcall, exec->state);
 306     SIMIX_simcall_answer(simcall);
 307   }
 308 }
 309
 310 void SIMIX_set_category(smx_activity_t synchro, const char *category)
 311 {
 312   if (synchro->state != SIMIX_RUNNING)
 313     return;
 314
 315   simgrid::kernel::activity::ExecImplPtr exec =
 316       boost::dynamic_pointer_cast<simgrid::kernel::activity::ExecImpl>(synchro);
 317   if (exec != nullptr) {
 318     exec->surf_exec->setCategory(category);
 319     return;
 320   }
 321
 322   simgrid::kernel::activity::CommImplPtr comm =
 323       boost::dynamic_pointer_cast<simgrid::kernel::activity::CommImpl>(synchro);
 324   if (comm != nullptr) {
 325     comm->surf_comm->setCategory(category);
 326   }
 327 }