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_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 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 next_event_date = -1.0;
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 next_event_date = future_evt_set->next_date();
75 XBT_DEBUG("Next TRACE event: %f", next_event_date);
77 if(! surf_network_model->nextOccuringEventIsIdempotent()){ // NS3, I see you
78 if (next_event_date!=-1.0 && time_delta!=-1.0) {
79 time_delta = MIN(next_event_date - NOW, time_delta);
81 time_delta = 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) {
94 XBT_DEBUG("no next TRACE event. Stop searching for it");
98 if ((time_delta == -1.0) || (next_event_date > NOW + time_delta))
99 break; // next event occurs after the next resource change, bail out
101 XBT_DEBUG("Updating models (min = %g, NOW = %g, next_event_date = %g)", time_delta, NOW, next_event_date);
103 while ((event = future_evt_set->pop_leq(next_event_date, &value, &resource))) {
104 if (resource->isUsed() || xbt_dict_get_or_null(watched_hosts_lib, resource->cname())) {
105 time_delta = next_event_date - NOW;
106 XBT_DEBUG("This event invalidates the next_occuring_event() computation of models. Next event set to %f", time_delta);
108 // 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
109 double round_start = NOW;
110 NOW = next_event_date;
111 /* update state of the corresponding resource to the new value. Does not touch lmm.
112 It will be modified if needed when updating actions */
113 XBT_DEBUG("Calling update_resource_state for resource %s", resource->cname());
114 resource->apply_event(event, value);
119 /* FIXME: Moved this test to here to avoid stopping simulation if there are actions running on cpus and all cpus are with availability = 0.
120 * This may cause an infinite loop if one cpu has a trace with periodicity = 0 and the other a trace with periodicity > 0.
121 * The options are: all traces with same periodicity(0 or >0) or we need to change the way how the events are managed */
122 if (time_delta < 0) {
123 XBT_DEBUG("No next event at all. Bail out now.");
127 XBT_DEBUG("Duration set to %f", time_delta);
129 // Bump the time: jump into the future
130 NOW = NOW + time_delta;
132 // Inform the models of the date change
133 for (auto model : *all_existing_models) {
134 model->updateActionsState(NOW, time_delta);
136 simgrid::s4u::onTimeAdvance(time_delta);
138 TRACE_paje_dump_buffer (0);
146 static surf_action_t ActionListExtract(simgrid::surf::ActionList* list)
150 surf_action_t res = &list->front();
155 surf_action_t surf_model_extract_done_action_set(surf_model_t model)
157 return ActionListExtract(model->getDoneActionSet());
160 surf_action_t surf_model_extract_failed_action_set(surf_model_t model){
161 return ActionListExtract(model->getFailedActionSet());
164 int surf_model_running_action_set_size(surf_model_t model){
165 return model->getRunningActionSet()->size();
168 surf_action_t surf_host_open(sg_host_t host, const char* fullpath){
169 return host->pimpl_->open(fullpath);
172 surf_action_t surf_host_close(sg_host_t host, surf_file_t fd){
173 return host->pimpl_->close(fd);
176 int surf_host_unlink(sg_host_t host, surf_file_t fd){
177 return host->pimpl_->unlink(fd);
180 size_t surf_host_get_size(sg_host_t host, surf_file_t fd){
181 return host->pimpl_->getSize(fd);
184 surf_action_t surf_host_read(sg_host_t host, surf_file_t fd, sg_size_t size){
185 return host->pimpl_->read(fd, size);
188 surf_action_t surf_host_write(sg_host_t host, surf_file_t fd, sg_size_t size){
189 return host->pimpl_->write(fd, size);
192 xbt_dynar_t surf_host_get_info(sg_host_t host, surf_file_t fd){
193 return host->pimpl_->getInfo(fd);
196 size_t surf_host_file_tell(sg_host_t host, surf_file_t fd){
197 return host->pimpl_->fileTell(fd);
200 int surf_host_file_seek(sg_host_t host, surf_file_t fd,
201 sg_offset_t offset, int origin){
202 return host->pimpl_->fileSeek(fd, offset, origin);
205 int surf_host_file_move(sg_host_t host, surf_file_t fd, const char* fullpath){
206 return host->pimpl_->fileMove(fd, fullpath);
209 sg_size_t surf_storage_get_size(surf_resource_t resource){
210 return static_cast<simgrid::surf::Storage*>(surf_storage_resource_priv(resource))->size_;
213 sg_size_t surf_storage_get_free_size(surf_resource_t resource){
214 return static_cast<simgrid::surf::Storage*>(surf_storage_resource_priv(resource))->getFreeSize();
217 sg_size_t surf_storage_get_used_size(surf_resource_t resource){
218 return static_cast<simgrid::surf::Storage*>(surf_storage_resource_priv(resource))->getUsedSize();
221 xbt_dict_t surf_storage_get_properties(surf_resource_t resource){
222 return static_cast<simgrid::surf::Storage*>(surf_storage_resource_priv(resource))->getProperties();
225 const char* surf_storage_get_host(surf_resource_t resource){
226 return static_cast<simgrid::surf::Storage*>(surf_storage_resource_priv(resource))->attach_;
229 const char* surf_storage_get_name(surf_resource_t resource){
230 return static_cast<simgrid::surf::Storage*>(surf_storage_resource_priv(resource))->cname();
233 void surf_cpu_action_set_bound(surf_action_t action, double bound) {
234 static_cast<simgrid::surf::CpuAction*>(action)->setBound(bound);
237 surf_file_t surf_storage_action_get_file(surf_action_t action){
238 return static_cast<simgrid::surf::StorageAction*>(action)->file_;