src/simix/smx_host.cpp

   1 /* Copyright (c) 2007-2019. 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 "simgrid/Exception.hpp"
   8 #include "smx_private.hpp"
   9 #include "src/kernel/activity/CommImpl.hpp"
  10 #include "src/kernel/activity/ExecImpl.hpp"
  11 #include "src/mc/mc_replay.hpp"
  12 #include "src/plugins/vm/VirtualMachineImpl.hpp"
  13 #include "src/simix/smx_host_private.hpp"
  14
  15 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_host, simix, "SIMIX hosts");
  16
  17 /* needs to be public and without simcall for exceptions and logging events */
  18 const char* sg_host_self_get_name()
  19 {
  20   sg_host_t host = sg_host_self();
  21   if (host == nullptr || SIMIX_process_self() == simix_global->maestro_process)
  22     return "";
  23
  24   return host->get_cname();
  25 }
  26
  27 simgrid::kernel::activity::ExecImplPtr SIMIX_execution_start(std::string name, std::string category,
  28                                                              double flops_amount, double priority, double bound,
  29                                                              sg_host_t host)
  30 {
  31   /* set surf's action */
  32   simgrid::kernel::resource::Action* surf_action = nullptr;
  33   if (not MC_is_active() && not MC_record_replay_is_active()) {
  34     surf_action = host->pimpl_cpu->execution_start(flops_amount);
  35     surf_action->set_priority(priority);
  36     if (bound > 0)
  37       surf_action->set_bound(bound);
  38   }
  39
  40   simgrid::kernel::activity::ExecImplPtr exec = simgrid::kernel::activity::ExecImplPtr(
  41       new simgrid::kernel::activity::ExecImpl(name, category, /*timeout_detector*/ nullptr, host));
  42   if (surf_action != nullptr) {
  43     exec->surf_action_ = surf_action;
  44     exec->surf_action_->set_data(exec.get());
  45   }
  46   XBT_DEBUG("Create execute synchro %p: %s", exec.get(), exec->name_.c_str());
  47   simgrid::kernel::activity::ExecImpl::on_creation(exec);
  48
  49   return exec;
  50 }
  51
  52 simgrid::kernel::activity::ExecImplPtr SIMIX_execution_parallel_start(std::string name, int host_nb,
  53                                                                       sg_host_t* host_list, double* flops_amount,
  54                                                                       double* bytes_amount, double rate, double timeout)
  55 {
  56
  57   /* Check that we are not mixing VMs and PMs in the parallel task */
  58   bool is_a_vm = (nullptr != dynamic_cast<simgrid::s4u::VirtualMachine*>(host_list[0]));
  59   for (int i = 1; i < host_nb; i++) {
  60     bool tmp_is_a_vm = (nullptr != dynamic_cast<simgrid::s4u::VirtualMachine*>(host_list[i]));
  61     xbt_assert(is_a_vm == tmp_is_a_vm, "parallel_execute: mixing VMs and PMs is not supported (yet).");
  62   }
  63
  64   /* set surf's synchro */
  65   simgrid::kernel::resource::Action* surf_action      = nullptr;
  66   simgrid::kernel::resource::Action* timeout_detector = nullptr;
  67   if (not MC_is_active() && not MC_record_replay_is_active()) {
  68     surf_action = surf_host_model->execute_parallel(host_nb, host_list, flops_amount, bytes_amount, rate);
  69     if (timeout > 0) {
  70       timeout_detector = host_list[0]->pimpl_cpu->sleep(timeout);
  71     }
  72   }
  73
  74   simgrid::kernel::activity::ExecImplPtr exec = simgrid::kernel::activity::ExecImplPtr(
  75       new simgrid::kernel::activity::ExecImpl(name, "", timeout_detector, nullptr));
  76   if (surf_action != nullptr) {
  77     exec->surf_action_ = surf_action;
  78     exec->surf_action_->set_data(exec.get());
  79   }
  80   XBT_DEBUG("Create parallel execute synchro %p", exec.get());
  81
  82   return exec;
  83 }
  84
  85 void simcall_HANDLER_execution_wait(smx_simcall_t simcall, smx_activity_t synchro)
  86 {
  87   XBT_DEBUG("Wait for execution of synchro %p, state %d", synchro.get(), (int)synchro->state_);
  88
  89   /* Associate this simcall to the synchro */
  90   synchro->simcalls_.push_back(simcall);
  91   simcall->issuer->waiting_synchro = synchro;
  92
  93   /* set surf's synchro */
  94   if (MC_is_active() || MC_record_replay_is_active()) {
  95     synchro->state_ = SIMIX_DONE;
  96     SIMIX_execution_finish(synchro);
  97     return;
  98   }
  99
 100   /* If the synchro is already finished then perform the error handling */
 101   if (synchro->state_ != SIMIX_RUNNING)
 102     SIMIX_execution_finish(synchro);
 103 }
 104
 105 void simcall_HANDLER_execution_test(smx_simcall_t simcall, smx_activity_t synchro)
 106 {
 107   int res = (synchro->state_ != SIMIX_WAITING && synchro->state_ != SIMIX_RUNNING);
 108   if (res) {
 109     synchro->simcalls_.push_back(simcall);
 110     SIMIX_execution_finish(synchro);
 111   } else {
 112     SIMIX_simcall_answer(simcall);
 113   }
 114   simcall_execution_test__set__result(simcall, res);
 115 }
 116
 117 void SIMIX_execution_finish(smx_activity_t synchro)
 118 {
 119   simgrid::kernel::activity::ExecImplPtr exec =
 120       boost::static_pointer_cast<simgrid::kernel::activity::ExecImpl>(synchro);
 121
 122   while (not synchro->simcalls_.empty()) {
 123     smx_simcall_t simcall = synchro->simcalls_.front();
 124     synchro->simcalls_.pop_front();
 125     switch (exec->state_) {
 126
 127       case SIMIX_DONE:
 128         /* do nothing, synchro done */
 129         XBT_DEBUG("SIMIX_execution_finished: execution successful");
 130         break;
 131
 132       case SIMIX_FAILED:
 133         XBT_DEBUG("SIMIX_execution_finished: host '%s' failed", simcall->issuer->host_->get_cname());
 134         simcall->issuer->context_->iwannadie = true;
 135         simcall->issuer->exception =
 136             std::make_exception_ptr(simgrid::HostFailureException(XBT_THROW_POINT, "Host failed"));
 137         break;
 138
 139       case SIMIX_CANCELED:
 140         XBT_DEBUG("SIMIX_execution_finished: execution canceled");
 141         SMX_EXCEPTION(simcall->issuer, cancel_error, 0, "Canceled");
 142         break;
 143
 144       case SIMIX_TIMEOUT:
 145         XBT_DEBUG("SIMIX_execution_finished: execution timeouted");
 146         simcall->issuer->exception = std::make_exception_ptr(simgrid::TimeoutError(XBT_THROW_POINT, "Timeouted"));
 147         break;
 148
 149       default:
 150         xbt_die("Internal error in SIMIX_execution_finish: unexpected synchro state %d", (int)exec->state_);
 151     }
 152     /* Fail the process if the host is down */
 153     if (simcall->issuer->host_->is_off())
 154       simcall->issuer->context_->iwannadie = true;
 155
 156     simcall->issuer->waiting_synchro = nullptr;
 157     simcall_execution_wait__set__result(simcall, exec->state_);
 158     SIMIX_simcall_answer(simcall);
 159   }
 160 }