1 /* Copyright (c) 2013-2016. 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 "src/plugins/vm/VirtualMachineImpl.hpp"
9 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_host, surf, "Logging specific to the SURF host module");
11 simgrid::surf::HostModel *surf_host_model = nullptr;
24 /* Each VM has a dummy CPU action on the PM layer. This CPU action works as the
25 * constraint (capacity) of the VM in the PM layer. If the VM does not have any
26 * active task, the dummy CPU action must be deactivated, so that the VM does
27 * not get any CPU share in the PM layer. */
28 void HostModel::ignoreEmptyVmInPmLMM()
30 /* iterate for all virtual machines */
31 for (s4u::VirtualMachine* ws_vm : vm::VirtualMachineImpl::allVms_) {
33 Cpu* cpu = ws_vm->pimpl_cpu;
35 int is_active = lmm_constraint_used(cpu->model()->getMaxminSystem(), cpu->constraint());
38 /* some tasks exist on this VM */
39 XBT_DEBUG("set the weight of the dummy CPU action on PM to 1");
41 /* FIXME: If we assign 1.05 and 0.05, the system makes apparently wrong values. */
42 ws_vm->pimpl_vm_->action_->setPriority(1);
45 /* no task exist on this VM */
46 XBT_DEBUG("set the weight of the dummy CPU action on PM to 0");
48 ws_vm->pimpl_vm_->action_->setPriority(0);
53 /* Helper function for executeParallelTask */
54 static inline double has_cost(double* array, int pos)
61 Action* HostModel::executeParallelTask(int host_nb, simgrid::s4u::Host** host_list, double* flops_amount,
62 double* bytes_amount, double rate)
64 Action* action = nullptr;
65 if ((host_nb == 1) && (has_cost(bytes_amount, 0) <= 0)) {
66 action = host_list[0]->pimpl_cpu->execution_start(flops_amount[0]);
67 } else if ((host_nb == 1) && (has_cost(flops_amount, 0) <= 0)) {
68 action = surf_network_model->communicate(host_list[0], host_list[0], bytes_amount[0], rate);
69 } else if ((host_nb == 2) && (has_cost(flops_amount, 0) <= 0) && (has_cost(flops_amount, 1) <= 0)) {
73 for (int i = 0; i < host_nb * host_nb; i++) {
74 if (has_cost(bytes_amount, i) > 0.0) {
76 value = has_cost(bytes_amount, i);
80 action = surf_network_model->communicate(host_list[0], host_list[1], value, rate);
82 xbt_die("Cannot have a communication with no flop to exchange in this model. You should consider using the "
85 xbt_die("Cannot have a communication that is not a simple point-to-point in this model. You should consider "
86 "using the ptask model");
90 "This model only accepts one of the following. You should consider using the ptask model for the other cases.\n"
91 " - execution with one host only and no communication\n"
92 " - Self-comms with one host only\n"
93 " - Communications with two hosts and no computation");
101 HostImpl::HostImpl(s4u::Host* host) : piface_(host)
103 /* The VM wants to reinstall a new HostImpl, but we don't want to leak the previously existing one */
104 delete piface_->pimpl_;
105 piface_->pimpl_ = this;
108 simgrid::surf::StorageImpl* HostImpl::findStorageOnMountList(const char* mount)
110 XBT_DEBUG("Search for storage name '%s' on '%s'", mount, piface_->cname());
111 if (storage_.find(mount) == storage_.end())
112 xbt_die("Can't find mount '%s' for '%s'", mount, piface_->cname());
114 return storage_.at(mount);
117 xbt_dict_t HostImpl::getMountedStorageList()
119 xbt_dict_t storage_list = xbt_dict_new_homogeneous(nullptr);
120 char* storage_name = nullptr;
122 for (auto mnt : storage_) {
123 storage_name = (char*)mnt.second->cname();
124 xbt_dict_set(storage_list, mnt.first.c_str(), storage_name, nullptr);
129 void HostImpl::getAttachedStorageList(std::vector<const char*>* storages)
131 for (auto s : storage_)
132 if (not strcmp(static_cast<const char*>(s.second->attach_), piface_->cname()))
133 storages->push_back(s.second->piface_.name());
136 Action* HostImpl::open(const char* fullpath)
138 simgrid::surf::StorageImpl* st = nullptr;
139 size_t longest_prefix_length = 0;
141 std::string mount_name;
143 XBT_DEBUG("Search for storage name for '%s' on '%s'", fullpath, piface_->cname());
144 for (auto mnt : storage_) {
145 XBT_DEBUG("See '%s'", mnt.first.c_str());
146 std::string file_mount_name = std::string(fullpath).substr(0, mnt.first.size());
148 if (file_mount_name == mnt.first && mnt.first.length() > longest_prefix_length) {
149 /* The current mount name is found in the full path and is bigger than the previous*/
150 longest_prefix_length = mnt.first.length();
154 if (longest_prefix_length > 0) { /* Mount point found, split fullpath into mount_name and path+filename*/
155 mount_name = std::string(fullpath).substr(0, longest_prefix_length);
156 path = std::string(fullpath).substr(longest_prefix_length, strlen(fullpath));
158 xbt_die("Can't find mount point for '%s' on '%s'", fullpath, piface_->cname());
160 XBT_DEBUG("OPEN %s on disk '%s'", path.c_str(), st->cname());
161 Action* action = st->open(mount_name.c_str(), path.c_str());
165 Action* HostImpl::close(surf_file_t fd)
167 simgrid::surf::StorageImpl* st = findStorageOnMountList(fd->mount);
168 XBT_DEBUG("CLOSE %s on disk '%s'", fd->name, st->cname());
169 return st->close(fd);
172 Action* HostImpl::read(surf_file_t fd, sg_size_t size)
174 simgrid::surf::StorageImpl* st = findStorageOnMountList(fd->mount);
175 XBT_DEBUG("READ %s on disk '%s'", fd->name, st->cname());
176 return st->read(fd, size);
179 Action* HostImpl::write(surf_file_t fd, sg_size_t size)
181 simgrid::surf::StorageImpl* st = findStorageOnMountList(fd->mount);
182 XBT_DEBUG("WRITE %s on disk '%s'", fd->name, st->cname());
183 return st->write(fd, size);
186 int HostImpl::unlink(surf_file_t fd)
189 XBT_WARN("No such file descriptor. Impossible to unlink");
193 simgrid::surf::StorageImpl* st = findStorageOnMountList(fd->mount);
194 /* Check if the file is on this storage */
195 if (st->content_->find(fd->name) == st->content_->end()) {
196 XBT_WARN("File %s is not on disk %s. Impossible to unlink", fd->name, st->cname());
199 XBT_DEBUG("UNLINK %s on disk '%s'", fd->name, st->cname());
200 st->usedSize_ -= fd->size;
202 // Remove the file from storage
203 sg_size_t* psize = st->content_->at(fd->name);
205 st->content_->erase(fd->name);
215 sg_size_t HostImpl::getSize(surf_file_t fd)
220 xbt_dynar_t HostImpl::getInfo(surf_file_t fd)
222 simgrid::surf::StorageImpl* st = findStorageOnMountList(fd->mount);
223 sg_size_t* psize = xbt_new(sg_size_t, 1);
225 xbt_dynar_t info = xbt_dynar_new(sizeof(void*), nullptr);
226 xbt_dynar_push_as(info, sg_size_t*, psize);
227 xbt_dynar_push_as(info, void*, fd->mount);
228 xbt_dynar_push_as(info, void*, (void*)st->cname());
229 xbt_dynar_push_as(info, void*, st->typeId_);
234 sg_size_t HostImpl::fileTell(surf_file_t fd)
236 return fd->current_position;
239 int HostImpl::fileSeek(surf_file_t fd, sg_offset_t offset, int origin)
243 fd->current_position = offset;
246 fd->current_position += offset;
249 fd->current_position = fd->size + offset;
256 int HostImpl::fileMove(surf_file_t fd, const char* fullpath)
258 /* Check if the new full path is on the same mount point */
259 if (not strncmp((const char*)fd->mount, fullpath, strlen(fd->mount))) {
260 std::map<std::string, sg_size_t*>* content = findStorageOnMountList(fd->mount)->content_;
261 if (content->find(fd->name) != content->end()) { // src file exists
262 sg_size_t* psize = content->at(std::string(fd->name));
263 sg_size_t* new_psize = new sg_size_t;
266 content->erase(fd->name);
267 std::string path = std::string(fullpath).substr(strlen(fd->mount), strlen(fullpath));
268 content->insert({path.c_str(), new_psize});
269 XBT_DEBUG("Move file from %s to %s, size '%llu'", fd->name, fullpath, *psize);
272 XBT_WARN("File %s doesn't exist", fd->name);
276 XBT_WARN("New full path %s is not on the same mount point: %s. Action has been canceled.", fullpath, fd->mount);