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.h"
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_iterator_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);
37 XBT_DEBUG ("Set every models in the right state by updating them to 0.");
38 for (auto 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 next_event_date = -1.0;
46 double model_next_action_end = -1.0;
48 simgrid::surf::Resource *resource = nullptr;
49 tmgr_trace_iterator_t event = nullptr;
52 xbt_assert(max_date > NOW,"You asked to simulate up to %f, but that's in the past already", max_date);
54 time_delta = max_date - NOW;
57 /* Physical models MUST be resolved first */
58 XBT_DEBUG("Looking for next event in physical models");
59 double next_event_phy = surf_host_model->nextOccuringEvent(NOW);
60 if ((time_delta < 0.0 || next_event_phy < time_delta) && next_event_phy >= 0.0) {
61 time_delta = next_event_phy;
63 if (surf_vm_model != nullptr) {
64 XBT_DEBUG("Looking for next event in virtual models");
65 double next_event_virt = surf_vm_model->nextOccuringEvent(NOW);
66 if ((time_delta < 0.0 || next_event_virt < time_delta) && next_event_virt >= 0.0)
67 time_delta = next_event_virt;
70 XBT_DEBUG("Min for resources (remember that NS3 don't update that value): %f", time_delta);
72 XBT_DEBUG("Looking for next trace event");
74 while (1) { // Handle next occurring events until none remains
75 next_event_date = future_evt_set->next_date();
76 XBT_DEBUG("Next TRACE event: %f", next_event_date);
78 if(! surf_network_model->nextOccuringEventIsIdempotent()){ // NS3, I see you
79 if (next_event_date!=-1.0 && time_delta!=-1.0) {
80 time_delta = MIN(next_event_date - NOW, time_delta);
82 time_delta = MAX(next_event_date - NOW, time_delta); // Get the positive component
85 XBT_DEBUG("Run the NS3 network at most %fs", time_delta);
86 // run until min or next flow
87 model_next_action_end = surf_network_model->nextOccuringEvent(time_delta);
89 XBT_DEBUG("Min for network : %f", model_next_action_end);
90 if(model_next_action_end>=0.0)
91 time_delta = model_next_action_end;
94 if (next_event_date < 0.0) {
95 XBT_DEBUG("no next TRACE event. Stop searching for it");
99 if ((time_delta == -1.0) || (next_event_date > NOW + time_delta))
100 break; // next event occurs after the next resource change, bail out
102 XBT_DEBUG("Updating models (min = %g, NOW = %g, next_event_date = %g)", time_delta, NOW, next_event_date);
104 while ((event = future_evt_set->pop_leq(next_event_date, &value, &resource))) {
105 if (resource->isUsed() || xbt_dict_get_or_null(watched_hosts_lib, resource->cname())) {
106 time_delta = next_event_date - NOW;
107 XBT_DEBUG("This event invalidates the next_occuring_event() computation of models. Next event set to %f", time_delta);
109 // 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
110 double round_start = NOW;
111 NOW = next_event_date;
112 /* update state of the corresponding resource to the new value. Does not touch lmm.
113 It will be modified if needed when updating actions */
114 XBT_DEBUG("Calling update_resource_state for resource %s", resource->cname());
115 resource->apply_event(event, value);
120 /* FIXME: Moved this test to here to avoid stopping simulation if there are actions running on cpus and all cpus are with availability = 0.
121 * This may cause an infinite loop if one cpu has a trace with periodicity = 0 and the other a trace with periodicity > 0.
122 * The options are: all traces with same periodicity(0 or >0) or we need to change the way how the events are managed */
123 if (time_delta < 0) {
124 XBT_DEBUG("No next event at all. Bail out now.");
128 XBT_DEBUG("Duration set to %f", time_delta);
130 // Bump the time: jump into the future
131 NOW = NOW + time_delta;
133 // Inform the models of the date change
134 for (auto model : *all_existing_models) {
135 model->updateActionsState(NOW, time_delta);
137 simgrid::s4u::onTimeAdvance(time_delta);
139 TRACE_paje_dump_buffer (0);
147 static surf_action_t ActionListExtract(simgrid::surf::ActionList* list)
151 surf_action_t res = &list->front();
156 surf_action_t surf_model_extract_done_action_set(surf_model_t model)
158 return ActionListExtract(model->getDoneActionSet());
161 surf_action_t surf_model_extract_failed_action_set(surf_model_t model){
162 return ActionListExtract(model->getFailedActionSet());
165 int surf_model_running_action_set_size(surf_model_t model){
166 return model->getRunningActionSet()->size();
169 surf_action_t surf_host_open(sg_host_t host, const char* fullpath){
170 return host->pimpl_->open(fullpath);
173 surf_action_t surf_host_close(sg_host_t host, surf_file_t fd){
174 return host->pimpl_->close(fd);
177 int surf_host_unlink(sg_host_t host, surf_file_t fd){
178 return host->pimpl_->unlink(fd);
181 size_t surf_host_get_size(sg_host_t host, surf_file_t fd){
182 return host->pimpl_->getSize(fd);
185 surf_action_t surf_host_read(sg_host_t host, surf_file_t fd, sg_size_t size){
186 return host->pimpl_->read(fd, size);
189 surf_action_t surf_host_write(sg_host_t host, surf_file_t fd, sg_size_t size){
190 return host->pimpl_->write(fd, size);
193 xbt_dynar_t surf_host_get_info(sg_host_t host, surf_file_t fd){
194 return host->pimpl_->getInfo(fd);
197 size_t surf_host_file_tell(sg_host_t host, surf_file_t fd){
198 return host->pimpl_->fileTell(fd);
201 int surf_host_file_seek(sg_host_t host, surf_file_t fd,
202 sg_offset_t offset, int origin){
203 return host->pimpl_->fileSeek(fd, offset, origin);
206 int surf_host_file_move(sg_host_t host, surf_file_t fd, const char* fullpath){
207 return host->pimpl_->fileMove(fd, fullpath);
210 sg_size_t surf_storage_get_size(surf_resource_t resource){
211 return static_cast<simgrid::surf::Storage*>(surf_storage_resource_priv(resource))->size_;
214 sg_size_t surf_storage_get_free_size(surf_resource_t resource){
215 return static_cast<simgrid::surf::Storage*>(surf_storage_resource_priv(resource))->getFreeSize();
218 sg_size_t surf_storage_get_used_size(surf_resource_t resource){
219 return static_cast<simgrid::surf::Storage*>(surf_storage_resource_priv(resource))->getUsedSize();
222 xbt_dict_t surf_storage_get_properties(surf_resource_t resource){
223 return static_cast<simgrid::surf::Storage*>(surf_storage_resource_priv(resource))->getProperties();
226 const char* surf_storage_get_host(surf_resource_t resource){
227 return static_cast<simgrid::surf::Storage*>(surf_storage_resource_priv(resource))->attach_;
230 const char* surf_storage_get_name(surf_resource_t resource){
231 return static_cast<simgrid::surf::Storage*>(surf_storage_resource_priv(resource))->cname();
234 void surf_cpu_action_set_bound(surf_action_t action, double bound) {
235 static_cast<simgrid::surf::CpuAction*>(action)->setBound(bound);
238 surf_file_t surf_storage_action_get_file(surf_action_t action){
239 return static_cast<simgrid::surf::StorageAction*>(action)->file_;