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::adjustWeightOfDummyCpuActions()
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: we should use lmm_update_variable_weight() ? */
42 /* FIXME: If we assign 1.05 and 0.05, the system makes apparently wrong values. */
43 ws_vm->pimpl_vm_->action_->setPriority(1);
46 /* no task exits on this VM */
47 XBT_DEBUG("set the weight of the dummy CPU action on PM to 0");
49 ws_vm->pimpl_vm_->action_->setPriority(0);
54 /* Helper function for executeParallelTask */
55 static inline double has_cost(double* array, int pos)
62 Action* HostModel::executeParallelTask(int host_nb, simgrid::s4u::Host** host_list, double* flops_amount,
63 double* bytes_amount, double rate)
65 Action* action = nullptr;
66 if ((host_nb == 1) && (has_cost(bytes_amount, 0) <= 0)) {
67 action = host_list[0]->pimpl_cpu->execution_start(flops_amount[0]);
68 } else if ((host_nb == 1) && (has_cost(flops_amount, 0) <= 0)) {
69 action = surf_network_model->communicate(host_list[0], host_list[0], bytes_amount[0], rate);
70 } else if ((host_nb == 2) && (has_cost(flops_amount, 0) <= 0) && (has_cost(flops_amount, 1) <= 0)) {
74 for (int i = 0; i < host_nb * host_nb; i++) {
75 if (has_cost(bytes_amount, i) > 0.0) {
77 value = has_cost(bytes_amount, i);
81 action = surf_network_model->communicate(host_list[0], host_list[1], value, rate);
83 xbt_die("Cannot have a communication with no flop to exchange in this model. You should consider using the "
86 xbt_die("Cannot have a communication that is not a simple point-to-point in this model. You should consider "
87 "using the ptask model");
91 "This model only accepts one of the following. You should consider using the ptask model for the other cases.\n"
92 " - execution with one host only and no communication\n"
93 " - Self-comms with one host only\n"
94 " - Communications with two hosts and no computation");
102 HostImpl::HostImpl(s4u::Host* host) : piface_(host)
104 /* The VM wants to reinstall a new HostImpl, but we don't want to leak the previously existing one */
105 delete piface_->pimpl_;
106 piface_->pimpl_ = this;
109 simgrid::surf::Storage* HostImpl::findStorageOnMountList(const char* mount)
111 XBT_DEBUG("Search for storage name '%s' on '%s'", mount, piface_->cname());
112 if (storage_.find(mount) == storage_.end())
113 xbt_die("Can't find mount '%s' for '%s'", mount, piface_->cname());
115 return storage_.at(mount);
118 xbt_dict_t HostImpl::getMountedStorageList()
120 xbt_dict_t storage_list = xbt_dict_new_homogeneous(nullptr);
121 char* storage_name = nullptr;
123 for (auto mnt : storage_) {
124 storage_name = (char*)mnt.second->cname();
125 xbt_dict_set(storage_list, mnt.first.c_str(), storage_name, nullptr);
130 void HostImpl::getAttachedStorageList(std::vector<const char*>* storages)
132 xbt_lib_cursor_t cursor;
135 xbt_lib_foreach(storage_lib, cursor, key, data)
137 if (xbt_lib_get_level(xbt_lib_get_elm_or_null(storage_lib, key), SURF_STORAGE_LEVEL) != nullptr) {
138 simgrid::surf::Storage* storage = static_cast<simgrid::surf::Storage*>(
139 xbt_lib_get_level(xbt_lib_get_elm_or_null(storage_lib, key), SURF_STORAGE_LEVEL));
140 if (not strcmp(static_cast<const char*>(storage->attach_), piface_->cname())) {
141 storages->push_back(storage->cname());
147 Action* HostImpl::open(const char* fullpath)
149 simgrid::surf::Storage* st = nullptr;
150 size_t longest_prefix_length = 0;
152 std::string mount_name;
154 XBT_DEBUG("Search for storage name for '%s' on '%s'", fullpath, piface_->cname());
155 for (auto mnt : storage_) {
156 XBT_DEBUG("See '%s'", mnt.first.c_str());
157 std::string file_mount_name = std::string(fullpath).substr(0, mnt.first.size());
159 if (file_mount_name == mnt.first && mnt.first.length() > longest_prefix_length) {
160 /* The current mount name is found in the full path and is bigger than the previous*/
161 longest_prefix_length = mnt.first.length();
165 if (longest_prefix_length > 0) { /* Mount point found, split fullpath into mount_name and path+filename*/
166 mount_name = std::string(fullpath).substr(0, longest_prefix_length);
167 path = std::string(fullpath).substr(longest_prefix_length, strlen(fullpath));
169 xbt_die("Can't find mount point for '%s' on '%s'", fullpath, piface_->cname());
171 XBT_DEBUG("OPEN %s on disk '%s'", path.c_str(), st->cname());
172 Action* action = st->open(mount_name.c_str(), path.c_str());
176 Action* HostImpl::close(surf_file_t fd)
178 simgrid::surf::Storage* st = findStorageOnMountList(fd->mount);
179 XBT_DEBUG("CLOSE %s on disk '%s'", fd->name, st->cname());
180 return st->close(fd);
183 Action* HostImpl::read(surf_file_t fd, sg_size_t size)
185 simgrid::surf::Storage* st = findStorageOnMountList(fd->mount);
186 XBT_DEBUG("READ %s on disk '%s'", fd->name, st->cname());
187 return st->read(fd, size);
190 Action* HostImpl::write(surf_file_t fd, sg_size_t size)
192 simgrid::surf::Storage* st = findStorageOnMountList(fd->mount);
193 XBT_DEBUG("WRITE %s on disk '%s'", fd->name, st->cname());
194 return st->write(fd, size);
197 int HostImpl::unlink(surf_file_t fd)
200 XBT_WARN("No such file descriptor. Impossible to unlink");
204 simgrid::surf::Storage* st = findStorageOnMountList(fd->mount);
205 /* Check if the file is on this storage */
206 if (st->content_->find(fd->name) == st->content_->end()) {
207 XBT_WARN("File %s is not on disk %s. Impossible to unlink", fd->name, st->cname());
210 XBT_DEBUG("UNLINK %s on disk '%s'", fd->name, st->cname());
211 st->usedSize_ -= fd->size;
213 // Remove the file from storage
214 sg_size_t* psize = st->content_->at(fd->name);
216 st->content_->erase(fd->name);
226 sg_size_t HostImpl::getSize(surf_file_t fd)
231 xbt_dynar_t HostImpl::getInfo(surf_file_t fd)
233 simgrid::surf::Storage* st = findStorageOnMountList(fd->mount);
234 sg_size_t* psize = xbt_new(sg_size_t, 1);
236 xbt_dynar_t info = xbt_dynar_new(sizeof(void*), nullptr);
237 xbt_dynar_push_as(info, sg_size_t*, psize);
238 xbt_dynar_push_as(info, void*, fd->mount);
239 xbt_dynar_push_as(info, void*, (void*)st->cname());
240 xbt_dynar_push_as(info, void*, st->typeId_);
245 sg_size_t HostImpl::fileTell(surf_file_t fd)
247 return fd->current_position;
250 int HostImpl::fileSeek(surf_file_t fd, sg_offset_t offset, int origin)
254 fd->current_position = offset;
257 fd->current_position += offset;
260 fd->current_position = fd->size + offset;
267 int HostImpl::fileMove(surf_file_t fd, const char* fullpath)
269 /* Check if the new full path is on the same mount point */
270 if (not strncmp((const char*)fd->mount, fullpath, strlen(fd->mount))) {
271 std::map<std::string, sg_size_t*>* content = findStorageOnMountList(fd->mount)->content_;
272 if (content->find(fd->name) != content->end()) { // src file exists
273 sg_size_t* psize = content->at(std::string(fd->name));
274 sg_size_t* new_psize = new sg_size_t;
277 content->erase(fd->name);
278 std::string path = std::string(fullpath).substr(strlen(fd->mount), strlen(fullpath));
279 content->insert({path.c_str(), new_psize});
280 XBT_DEBUG("Move file from %s to %s, size '%llu'", fd->name, fullpath, *psize);
283 XBT_WARN("File %s doesn't exist", fd->name);
287 XBT_WARN("New full path %s is not on the same mount point: %s. Action has been canceled.", fullpath, fd->mount);