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"
10 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_kernel);
20 double next_event_date = -1.0;
21 tmgr_trace_event_t event = nullptr;
23 simgrid::surf::Resource *resource = nullptr;
25 XBT_DEBUG ("Consume all trace events occurring before the starting time.");
26 while ((next_event_date = future_evt_set->next_date()) != -1.0) {
27 if (next_event_date > NOW)
30 while ((event = future_evt_set->pop_leq(next_event_date, &value, &resource))) {
32 resource->apply_event(event, value);
36 XBT_DEBUG ("Set every models in the right state by updating them to 0.");
37 for (auto const& model : *all_existing_models)
38 model->updateActionsState(NOW, 0.0);
41 double surf_solve(double max_date)
43 double time_delta = -1.0; /* duration */
44 double model_next_action_end = -1.0;
46 simgrid::surf::Resource *resource = nullptr;
47 tmgr_trace_event_t event = nullptr;
50 xbt_assert(max_date > NOW,"You asked to simulate up to %f, but that's in the past already", max_date);
52 time_delta = max_date - NOW;
55 /* Physical models MUST be resolved first */
56 XBT_DEBUG("Looking for next event in physical models");
57 double next_event_phy = surf_host_model->nextOccuringEvent(NOW);
58 if ((time_delta < 0.0 || next_event_phy < time_delta) && next_event_phy >= 0.0) {
59 time_delta = next_event_phy;
61 if (surf_vm_model != nullptr) {
62 XBT_DEBUG("Looking for next event in virtual models");
63 double next_event_virt = surf_vm_model->nextOccuringEvent(NOW);
64 if ((time_delta < 0.0 || next_event_virt < time_delta) && next_event_virt >= 0.0)
65 time_delta = next_event_virt;
68 XBT_DEBUG("Min for resources (remember that NS3 don't update that value): %f", time_delta);
70 XBT_DEBUG("Looking for next trace event");
72 while (1) { // Handle next occurring events until none remains
73 double next_event_date = future_evt_set->next_date();
74 XBT_DEBUG("Next TRACE event: %f", next_event_date);
76 if (not surf_network_model->nextOccuringEventIsIdempotent()) { // NS3, I see you
77 if (next_event_date != -1.0) {
78 time_delta = MIN(next_event_date - NOW, time_delta);
80 time_delta = MAX(next_event_date - NOW, time_delta); // Get the positive component
83 XBT_DEBUG("Run the NS3 network at most %fs", time_delta);
84 // run until min or next flow
85 model_next_action_end = surf_network_model->nextOccuringEvent(time_delta);
87 XBT_DEBUG("Min for network : %f", model_next_action_end);
88 if (model_next_action_end >= 0.0)
89 time_delta = model_next_action_end;
92 if (next_event_date < 0.0 || (next_event_date > NOW + time_delta)) {
93 // next event may have already occurred or will after the next resource change, then bail out
94 XBT_DEBUG("no next usable TRACE event. Stop searching for it");
98 XBT_DEBUG("Updating models (min = %g, NOW = %g, next_event_date = %g)", time_delta, NOW, next_event_date);
100 while ((event = future_evt_set->pop_leq(next_event_date, &value, &resource))) {
101 if (resource->isUsed() || (watched_hosts.find(resource->getCname()) != watched_hosts.end())) {
102 time_delta = next_event_date - NOW;
103 XBT_DEBUG("This event invalidates the next_occuring_event() computation of models. Next event set to %f", time_delta);
105 // 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
106 double round_start = NOW;
107 NOW = next_event_date;
108 /* update state of the corresponding resource to the new value. Does not touch lmm.
109 It will be modified if needed when updating actions */
110 XBT_DEBUG("Calling update_resource_state for resource %s", resource->getCname());
111 resource->apply_event(event, value);
116 /* FIXME: Moved this test to here to avoid stopping simulation if there are actions running on cpus and all cpus are with availability = 0.
117 * This may cause an infinite loop if one cpu has a trace with periodicity = 0 and the other a trace with periodicity > 0.
118 * The options are: all traces with same periodicity(0 or >0) or we need to change the way how the events are managed */
119 if (time_delta < 0) {
120 XBT_DEBUG("No next event at all. Bail out now.");
124 XBT_DEBUG("Duration set to %f", time_delta);
126 // Bump the time: jump into the future
127 NOW = NOW + time_delta;
129 // Inform the models of the date change
130 for (auto const& model : *all_existing_models)
131 model->updateActionsState(NOW, time_delta);
133 simgrid::s4u::onTimeAdvance(time_delta);
135 TRACE_paje_dump_buffer(false);
143 static surf_action_t ActionListExtract(simgrid::surf::ActionList* list)
147 surf_action_t res = &list->front();
152 surf_action_t surf_model_extract_done_action_set(surf_model_t model)
154 return ActionListExtract(model->getDoneActionSet());
157 surf_action_t surf_model_extract_failed_action_set(surf_model_t model){
158 return ActionListExtract(model->getFailedActionSet());
161 int surf_model_running_action_set_size(surf_model_t model){
162 return model->getRunningActionSet()->size();
165 void surf_cpu_action_set_bound(surf_action_t action, double bound) {
166 static_cast<simgrid::surf::CpuAction*>(action)->setBound(bound);