1 /* Copyright (c) 2013-2017. 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::surf::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->updateActionsState(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::surf::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->nextOccuringEvent(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->nextOccuringEvent(NOW);
65 if ((time_delta < 0.0 || next_event_virt < time_delta) && next_event_virt >= 0.0)
66 time_delta = next_event_virt;
69 XBT_DEBUG("Min for resources (remember that NS3 don't update that value): %f", time_delta);
71 XBT_DEBUG("Looking for next trace event");
73 while (1) { // Handle next occurring events until none remains
74 double next_event_date = future_evt_set->next_date();
75 XBT_DEBUG("Next TRACE event: %f", next_event_date);
77 if (not surf_network_model->nextOccuringEventIsIdempotent()) { // NS3, I see you
78 if (next_event_date != -1.0) {
79 time_delta = std::min(next_event_date - NOW, time_delta);
81 time_delta = std::max(next_event_date - NOW, time_delta); // Get the positive component
84 XBT_DEBUG("Run the NS3 network at most %fs", time_delta);
85 // run until min or next flow
86 model_next_action_end = surf_network_model->nextOccuringEvent(time_delta);
88 XBT_DEBUG("Min for network : %f", model_next_action_end);
89 if (model_next_action_end >= 0.0)
90 time_delta = model_next_action_end;
93 if (next_event_date < 0.0 || (next_event_date > NOW + time_delta)) {
94 // next event may have already occurred or will after the next resource change, then bail out
95 XBT_DEBUG("no next usable TRACE event. Stop searching for it");
99 XBT_DEBUG("Updating models (min = %g, NOW = %g, next_event_date = %g)", time_delta, NOW, next_event_date);
101 while ((event = future_evt_set->pop_leq(next_event_date, &value, &resource))) {
102 if (resource->isUsed() || (watched_hosts.find(resource->getCname()) != watched_hosts.end())) {
103 time_delta = next_event_date - NOW;
104 XBT_DEBUG("This event invalidates the next_occuring_event() computation of models. Next event set to %f", time_delta);
106 // 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
107 double round_start = NOW;
108 NOW = next_event_date;
109 /* update state of the corresponding resource to the new value. Does not touch lmm.
110 It will be modified if needed when updating actions */
111 XBT_DEBUG("Calling update_resource_state for resource %s", resource->getCname());
112 resource->apply_event(event, value);
117 /* FIXME: Moved this test to here to avoid stopping simulation if there are actions running on cpus and all cpus are with availability = 0.
118 * This may cause an infinite loop if one cpu has a trace with periodicity = 0 and the other a trace with periodicity > 0.
119 * The options are: all traces with same periodicity(0 or >0) or we need to change the way how the events are managed */
120 if (time_delta < 0) {
121 XBT_DEBUG("No next event at all. Bail out now.");
125 XBT_DEBUG("Duration set to %f", time_delta);
127 // Bump the time: jump into the future
128 NOW = NOW + time_delta;
130 // Inform the models of the date change
131 for (auto const& model : *all_existing_models)
132 model->updateActionsState(NOW, time_delta);
134 simgrid::s4u::onTimeAdvance(time_delta);
136 TRACE_paje_dump_buffer(false);
144 static surf_action_t ActionListExtract(simgrid::surf::ActionList* list)
148 surf_action_t res = &list->front();
153 surf_action_t surf_model_extract_done_action_set(surf_model_t model)
155 return ActionListExtract(model->getDoneActionSet());
158 surf_action_t surf_model_extract_failed_action_set(surf_model_t model){
159 return ActionListExtract(model->getFailedActionSet());
162 int surf_model_running_action_set_size(surf_model_t model){
163 return model->getRunningActionSet()->size();
166 void surf_cpu_action_set_bound(surf_action_t action, double bound) {
167 static_cast<simgrid::surf::CpuAction*>(action)->setBound(bound);