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 /** @brief use destroy() instead of this destructor */
110 HostImpl::~HostImpl() = default;
112 simgrid::surf::Storage* HostImpl::findStorageOnMountList(const char* mount)
114 simgrid::surf::Storage* st = nullptr;
116 XBT_DEBUG("Search for storage name '%s' on '%s'", mount, piface_->cname());
117 for (auto mnt : storage_) {
118 XBT_DEBUG("See '%s'", mnt.name);
119 if (!strcmp(mount, mnt.name)) {
120 st = static_cast<simgrid::surf::Storage*>(mnt.storage);
125 xbt_die("Can't find mount '%s' for '%s'", mount, piface_->cname());
129 xbt_dict_t HostImpl::getMountedStorageList()
131 xbt_dict_t storage_list = xbt_dict_new_homogeneous(nullptr);
132 char* storage_name = nullptr;
134 for (auto mnt : storage_) {
135 storage_name = (char*)static_cast<simgrid::surf::Storage*>(mnt.storage)->cname();
136 xbt_dict_set(storage_list, mnt.name, storage_name, nullptr);
141 void HostImpl::getAttachedStorageList(std::vector<const char*>* storages)
143 xbt_lib_cursor_t cursor;
146 xbt_lib_foreach(storage_lib, cursor, key, data)
148 if (xbt_lib_get_level(xbt_lib_get_elm_or_null(storage_lib, key), SURF_STORAGE_LEVEL) != nullptr) {
149 simgrid::surf::Storage* storage = static_cast<simgrid::surf::Storage*>(
150 xbt_lib_get_level(xbt_lib_get_elm_or_null(storage_lib, key), SURF_STORAGE_LEVEL));
151 if (!strcmp(static_cast<const char*>(storage->attach_), piface_->cname())) {
152 storages->push_back(storage->cname());
158 Action* HostImpl::open(const char* fullpath)
161 simgrid::surf::Storage* st = nullptr;
162 size_t longest_prefix_length = 0;
164 std::string mount_name;
166 XBT_DEBUG("Search for storage name for '%s' on '%s'", fullpath, piface_->cname());
167 for (auto mnt : storage_) {
168 XBT_DEBUG("See '%s'", mnt.name);
169 std::string file_mount_name = std::string(fullpath).substr(0, strlen(mnt.name));
171 if (!strcmp(file_mount_name.c_str(), mnt.name) &&
172 strlen(mnt.name) > longest_prefix_length) { /* The current mount name is found in the full path and is
173 bigger than the previous*/
174 longest_prefix_length = strlen(mnt.name);
175 st = static_cast<simgrid::surf::Storage*>(mnt.storage);
178 if (longest_prefix_length > 0) { /* Mount point found, split fullpath into mount_name and path+filename*/
179 mount_name = std::string(fullpath).substr(0, longest_prefix_length);
180 path = std::string(fullpath).substr(longest_prefix_length, strlen(fullpath));
182 xbt_die("Can't find mount point for '%s' on '%s'", fullpath, piface_->cname());
184 XBT_DEBUG("OPEN %s on disk '%s'", path.c_str(), st->cname());
185 Action* action = st->open(mount_name.c_str(), path.c_str());
189 Action* HostImpl::close(surf_file_t fd)
191 simgrid::surf::Storage* st = findStorageOnMountList(fd->mount);
192 XBT_DEBUG("CLOSE %s on disk '%s'", fd->name, st->cname());
193 return st->close(fd);
196 Action* HostImpl::read(surf_file_t fd, sg_size_t size)
198 simgrid::surf::Storage* st = findStorageOnMountList(fd->mount);
199 XBT_DEBUG("READ %s on disk '%s'", fd->name, st->cname());
200 return st->read(fd, size);
203 Action* HostImpl::write(surf_file_t fd, sg_size_t size)
205 simgrid::surf::Storage* st = findStorageOnMountList(fd->mount);
206 XBT_DEBUG("WRITE %s on disk '%s'", fd->name, st->cname());
207 return st->write(fd, size);
210 int HostImpl::unlink(surf_file_t fd)
213 XBT_WARN("No such file descriptor. Impossible to unlink");
217 simgrid::surf::Storage* st = findStorageOnMountList(fd->mount);
218 /* Check if the file is on this storage */
219 if (!xbt_dict_get_or_null(st->content_, fd->name)) {
220 XBT_WARN("File %s is not on disk %s. Impossible to unlink", fd->name, st->cname());
223 XBT_DEBUG("UNLINK %s on disk '%s'", fd->name, st->cname());
224 st->usedSize_ -= fd->size;
226 // Remove the file from storage
227 xbt_dict_remove(st->content_, fd->name);
237 sg_size_t HostImpl::getSize(surf_file_t fd)
242 xbt_dynar_t HostImpl::getInfo(surf_file_t fd)
244 simgrid::surf::Storage* st = findStorageOnMountList(fd->mount);
245 sg_size_t* psize = xbt_new(sg_size_t, 1);
247 xbt_dynar_t info = xbt_dynar_new(sizeof(void*), nullptr);
248 xbt_dynar_push_as(info, sg_size_t*, psize);
249 xbt_dynar_push_as(info, void*, fd->mount);
250 xbt_dynar_push_as(info, void*, (void*)st->cname());
251 xbt_dynar_push_as(info, void*, st->typeId_);
252 xbt_dynar_push_as(info, void*, st->contentType_);
257 sg_size_t HostImpl::fileTell(surf_file_t fd)
259 return fd->current_position;
262 int HostImpl::fileSeek(surf_file_t fd, sg_offset_t offset, int origin)
267 fd->current_position = offset;
270 fd->current_position += offset;
273 fd->current_position = fd->size + offset;
280 int HostImpl::fileMove(surf_file_t fd, const char* fullpath)
282 /* Check if the new full path is on the same mount point */
283 if (!strncmp((const char*)fd->mount, fullpath, strlen(fd->mount))) {
284 sg_size_t* psize = (sg_size_t*)xbt_dict_get_or_null(findStorageOnMountList(fd->mount)->content_, fd->name);
285 if (psize) { // src file exists
286 sg_size_t* new_psize = xbt_new(sg_size_t, 1);
288 xbt_dict_remove(findStorageOnMountList(fd->mount)->content_, fd->name);
289 std::string path = std::string(fullpath).substr(strlen(fd->mount), strlen(fullpath));
290 xbt_dict_set(findStorageOnMountList(fd->mount)->content_, path.c_str(), new_psize, nullptr);
291 XBT_DEBUG("Move file from %s to %s, size '%llu'", fd->name, fullpath, *psize);
294 XBT_WARN("File %s doesn't exist", fd->name);
298 XBT_WARN("New full path %s is not on the same mount point: %s. Action has been canceled.", fullpath, fd->mount);