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_) {
32 Cpu* cpu = ws_vm->pimpl_cpu;
33 int active_tasks = lmm_constraint_get_variable_amount(cpu->constraint());
35 /* The impact of the VM over its PM is the min between its vCPU amount and the amount of tasks it contains */
36 int impact = std::min(active_tasks, ws_vm->pimpl_vm_->coreAmount());
38 XBT_INFO("set the weight of the dummy CPU action of VM%p on PM to %d (#tasks: %d)", ws_vm, impact, active_tasks);
39 ws_vm->pimpl_vm_->action_->setPriority(impact);
43 /* Helper function for executeParallelTask */
44 static inline double has_cost(double* array, int pos)
51 Action* HostModel::executeParallelTask(int host_nb, simgrid::s4u::Host** host_list, double* flops_amount,
52 double* bytes_amount, double rate)
54 Action* action = nullptr;
55 if ((host_nb == 1) && (has_cost(bytes_amount, 0) <= 0)) {
56 action = host_list[0]->pimpl_cpu->execution_start(flops_amount[0]);
57 } else if ((host_nb == 1) && (has_cost(flops_amount, 0) <= 0)) {
58 action = surf_network_model->communicate(host_list[0], host_list[0], bytes_amount[0], rate);
59 } else if ((host_nb == 2) && (has_cost(flops_amount, 0) <= 0) && (has_cost(flops_amount, 1) <= 0)) {
63 for (int i = 0; i < host_nb * host_nb; i++) {
64 if (has_cost(bytes_amount, i) > 0.0) {
66 value = has_cost(bytes_amount, i);
70 action = surf_network_model->communicate(host_list[0], host_list[1], value, rate);
72 xbt_die("Cannot have a communication with no flop to exchange in this model. You should consider using the "
75 xbt_die("Cannot have a communication that is not a simple point-to-point in this model. You should consider "
76 "using the ptask model");
80 "This model only accepts one of the following. You should consider using the ptask model for the other cases.\n"
81 " - execution with one host only and no communication\n"
82 " - Self-comms with one host only\n"
83 " - Communications with two hosts and no computation");
91 HostImpl::HostImpl(s4u::Host* host) : piface_(host)
93 /* The VM wants to reinstall a new HostImpl, but we don't want to leak the previously existing one */
94 delete piface_->pimpl_;
95 piface_->pimpl_ = this;
98 simgrid::surf::StorageImpl* HostImpl::findStorageOnMountList(const char* mount)
100 XBT_DEBUG("Search for storage name '%s' on '%s'", mount, piface_->cname());
101 if (storage_.find(mount) == storage_.end())
102 xbt_die("Can't find mount '%s' for '%s'", mount, piface_->cname());
104 return storage_.at(mount);
107 xbt_dict_t HostImpl::getMountedStorageList()
109 xbt_dict_t storage_list = xbt_dict_new_homogeneous(nullptr);
110 char* storage_name = nullptr;
112 for (auto mnt : storage_) {
113 storage_name = (char*)mnt.second->cname();
114 xbt_dict_set(storage_list, mnt.first.c_str(), storage_name, nullptr);
119 void HostImpl::getAttachedStorageList(std::vector<const char*>* storages)
121 for (auto s : storage_)
122 if (not strcmp(static_cast<const char*>(s.second->attach_), piface_->cname()))
123 storages->push_back(s.second->piface_.name());
126 Action* HostImpl::open(const char* fullpath)
128 simgrid::surf::StorageImpl* st = nullptr;
129 size_t longest_prefix_length = 0;
131 std::string mount_name;
133 XBT_DEBUG("Search for storage name for '%s' on '%s'", fullpath, piface_->cname());
134 for (auto mnt : storage_) {
135 XBT_DEBUG("See '%s'", mnt.first.c_str());
136 std::string file_mount_name = std::string(fullpath).substr(0, mnt.first.size());
138 if (file_mount_name == mnt.first && mnt.first.length() > longest_prefix_length) {
139 /* The current mount name is found in the full path and is bigger than the previous*/
140 longest_prefix_length = mnt.first.length();
144 if (longest_prefix_length > 0) { /* Mount point found, split fullpath into mount_name and path+filename*/
145 mount_name = std::string(fullpath).substr(0, longest_prefix_length);
146 path = std::string(fullpath).substr(longest_prefix_length, strlen(fullpath));
148 xbt_die("Can't find mount point for '%s' on '%s'", fullpath, piface_->cname());
150 XBT_DEBUG("OPEN %s on disk '%s'", path.c_str(), st->cname());
151 Action* action = st->open(mount_name.c_str(), path.c_str());
155 Action* HostImpl::close(surf_file_t fd)
157 simgrid::surf::StorageImpl* st = findStorageOnMountList(fd->mount);
158 XBT_DEBUG("CLOSE %s on disk '%s'", fd->name, st->cname());
159 return st->close(fd);
162 Action* HostImpl::read(surf_file_t fd, sg_size_t size)
164 simgrid::surf::StorageImpl* st = findStorageOnMountList(fd->mount);
165 XBT_DEBUG("READ %s on disk '%s'", fd->name, st->cname());
166 return st->read(fd, size);
169 Action* HostImpl::write(surf_file_t fd, sg_size_t size)
171 simgrid::surf::StorageImpl* st = findStorageOnMountList(fd->mount);
172 XBT_DEBUG("WRITE %s on disk '%s'", fd->name, st->cname());
173 return st->write(fd, size);
176 int HostImpl::unlink(surf_file_t fd)
179 XBT_WARN("No such file descriptor. Impossible to unlink");
183 simgrid::surf::StorageImpl* st = findStorageOnMountList(fd->mount);
184 /* Check if the file is on this storage */
185 if (st->content_->find(fd->name) == st->content_->end()) {
186 XBT_WARN("File %s is not on disk %s. Impossible to unlink", fd->name, st->cname());
189 XBT_DEBUG("UNLINK %s on disk '%s'", fd->name, st->cname());
190 st->usedSize_ -= fd->size;
192 // Remove the file from storage
193 sg_size_t* psize = st->content_->at(fd->name);
195 st->content_->erase(fd->name);
205 sg_size_t HostImpl::getSize(surf_file_t fd)
210 xbt_dynar_t HostImpl::getInfo(surf_file_t fd)
212 simgrid::surf::StorageImpl* st = findStorageOnMountList(fd->mount);
213 sg_size_t* psize = xbt_new(sg_size_t, 1);
215 xbt_dynar_t info = xbt_dynar_new(sizeof(void*), nullptr);
216 xbt_dynar_push_as(info, sg_size_t*, psize);
217 xbt_dynar_push_as(info, void*, fd->mount);
218 xbt_dynar_push_as(info, void*, (void*)st->cname());
219 xbt_dynar_push_as(info, void*, st->typeId_);
224 sg_size_t HostImpl::fileTell(surf_file_t fd)
226 return fd->current_position;
229 int HostImpl::fileSeek(surf_file_t fd, sg_offset_t offset, int origin)
233 fd->current_position = offset;
236 fd->current_position += offset;
239 fd->current_position = fd->size + offset;
246 int HostImpl::fileMove(surf_file_t fd, const char* fullpath)
248 /* Check if the new full path is on the same mount point */
249 if (not strncmp((const char*)fd->mount, fullpath, strlen(fd->mount))) {
250 std::map<std::string, sg_size_t*>* content = findStorageOnMountList(fd->mount)->content_;
251 if (content->find(fd->name) != content->end()) { // src file exists
252 sg_size_t* psize = content->at(std::string(fd->name));
253 sg_size_t* new_psize = new sg_size_t;
256 content->erase(fd->name);
257 std::string path = std::string(fullpath).substr(strlen(fd->mount), strlen(fullpath));
258 content->insert({path.c_str(), new_psize});
259 XBT_DEBUG("Move file from %s to %s, size '%llu'", fd->name, fullpath, *psize);
262 XBT_WARN("File %s doesn't exist", fd->name);
266 XBT_WARN("New full path %s is not on the same mount point: %s. Action has been canceled.", fullpath, fd->mount);