1 /* Copyright (c) 2013-2018. The SimGrid Team. All rights reserved. */
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. */
6 #include "simgrid/s4u/Engine.hpp"
7 #include "src/instr/instr_private.hpp"
8 #include "src/plugins/vm/VirtualMachineImpl.hpp"
11 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_kernel);
21 double next_event_date = -1.0;
22 tmgr_trace_event_t event = nullptr;
24 simgrid::kernel::resource::Resource* resource = nullptr;
26 XBT_DEBUG ("Consume all trace events occurring before the starting time.");
27 while ((next_event_date = future_evt_set->next_date()) != -1.0) {
28 if (next_event_date > NOW)
31 while ((event = future_evt_set->pop_leq(next_event_date, &value, &resource))) {
33 resource->apply_event(event, value);
37 XBT_DEBUG ("Set every models in the right state by updating them to 0.");
38 for (auto const& model : *all_existing_models)
39 model->update_actions_state(NOW, 0.0);
42 double surf_solve(double max_date)
44 double time_delta = -1.0; /* duration */
45 double model_next_action_end = -1.0;
47 simgrid::kernel::resource::Resource* resource = nullptr;
48 tmgr_trace_event_t event = nullptr;
51 xbt_assert(max_date > NOW,"You asked to simulate up to %f, but that's in the past already", max_date);
53 time_delta = max_date - NOW;
56 /* Physical models MUST be resolved first */
57 XBT_DEBUG("Looking for next event in physical models");
58 double next_event_phy = surf_host_model->next_occuring_event(NOW);
59 if ((time_delta < 0.0 || next_event_phy < time_delta) && next_event_phy >= 0.0) {
60 time_delta = next_event_phy;
62 if (surf_vm_model != nullptr) {
63 XBT_DEBUG("Looking for next event in virtual models");
64 double next_event_virt = surf_vm_model->next_occuring_event(NOW);
65 if ((time_delta < 0.0 || next_event_virt < time_delta) && next_event_virt >= 0.0)
66 time_delta = next_event_virt;
69 for (auto const& model : *all_existing_models) {
70 if (model != surf_host_model && model != surf_vm_model && model != surf_network_model &&
71 model != surf_storage_model) {
72 double next_event_model = model->next_occuring_event(NOW);
73 if ((time_delta < 0.0 || next_event_model < time_delta) && next_event_model >= 0.0)
74 time_delta = next_event_model;
78 XBT_DEBUG("Min for resources (remember that NS3 don't update that value): %f", time_delta);
80 XBT_DEBUG("Looking for next trace event");
82 while (1) { // Handle next occurring events until none remains
83 double next_event_date = future_evt_set->next_date();
84 XBT_DEBUG("Next TRACE event: %f", next_event_date);
86 if (not surf_network_model->next_occuring_event_is_idempotent()) { // NS3, I see you
87 if (next_event_date != -1.0) {
88 time_delta = std::min(next_event_date - NOW, time_delta);
90 time_delta = std::max(next_event_date - NOW, time_delta); // Get the positive component
93 XBT_DEBUG("Run the NS3 network at most %fs", time_delta);
94 // run until min or next flow
95 model_next_action_end = surf_network_model->next_occuring_event(time_delta);
97 XBT_DEBUG("Min for network : %f", model_next_action_end);
98 if (model_next_action_end >= 0.0)
99 time_delta = model_next_action_end;
102 if (next_event_date < 0.0 || (next_event_date > NOW + time_delta)) {
103 // next event may have already occurred or will after the next resource change, then bail out
104 XBT_DEBUG("no next usable TRACE event. Stop searching for it");
108 XBT_DEBUG("Updating models (min = %g, NOW = %g, next_event_date = %g)", time_delta, NOW, next_event_date);
110 while ((event = future_evt_set->pop_leq(next_event_date, &value, &resource))) {
111 if (resource->is_used() || (watched_hosts.find(resource->get_cname()) != watched_hosts.end())) {
112 time_delta = next_event_date - NOW;
113 XBT_DEBUG("This event invalidates the next_occuring_event() computation of models. Next event set to %f", time_delta);
115 // FIXME: I'm too lame to update NOW live, so I change it and restore it so that the real update with surf_min will work
116 double round_start = NOW;
117 NOW = next_event_date;
118 /* update state of the corresponding resource to the new value. Does not touch lmm.
119 It will be modified if needed when updating actions */
120 XBT_DEBUG("Calling update_resource_state for resource %s", resource->get_cname());
121 resource->apply_event(event, value);
126 /* FIXME: Moved this test to here to avoid stopping simulation if there are actions running on cpus and all cpus are with availability = 0.
127 * This may cause an infinite loop if one cpu has a trace with periodicity = 0 and the other a trace with periodicity > 0.
128 * The options are: all traces with same periodicity(0 or >0) or we need to change the way how the events are managed */
129 if (time_delta < 0) {
130 XBT_DEBUG("No next event at all. Bail out now.");
134 XBT_DEBUG("Duration set to %f", time_delta);
136 // Bump the time: jump into the future
137 NOW = NOW + time_delta;
139 // Inform the models of the date change
140 for (auto const& model : *all_existing_models)
141 model->update_actions_state(NOW, time_delta);
143 simgrid::s4u::on_time_advance(time_delta);
145 TRACE_paje_dump_buffer(false);
153 static simgrid::kernel::resource::Action* ActionListExtract(simgrid::kernel::resource::Action::StateSet* list)
157 simgrid::kernel::resource::Action* res = &list->front();
162 simgrid::kernel::resource::Action* surf_model_extract_done_action_set(simgrid::kernel::resource::Model* model)
164 return ActionListExtract(model->get_finished_action_set());
167 simgrid::kernel::resource::Action* surf_model_extract_failed_action_set(simgrid::kernel::resource::Model* model)
169 return ActionListExtract(model->get_failed_action_set());
172 int surf_model_running_action_set_size(simgrid::kernel::resource::Model* model)
174 return model->get_started_action_set()->size();
177 void surf_cpu_action_set_bound(simgrid::kernel::resource::Action* action, double bound)
179 static_cast<simgrid::surf::CpuAction*>(action)->set_bound(bound);