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/surf/HostImpl.hpp"
7 #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;
118 XBT_DEBUG("Search for storage name '%s' on '%s'", mount, piface_->cname());
119 xbt_dynar_foreach (storage_, cursor, mnt) {
120 XBT_DEBUG("See '%s'", mnt.name);
121 if (!strcmp(mount, mnt.name)) {
122 st = static_cast<simgrid::surf::Storage*>(mnt.storage);
127 xbt_die("Can't find mount '%s' for '%s'", mount, piface_->cname());
131 xbt_dict_t HostImpl::getMountedStorageList()
135 xbt_dict_t storage_list = xbt_dict_new_homogeneous(nullptr);
136 char* storage_name = nullptr;
138 xbt_dynar_foreach (storage_, i, mnt) {
139 storage_name = (char*)static_cast<simgrid::surf::Storage*>(mnt.storage)->cname();
140 xbt_dict_set(storage_list, mnt.name, storage_name, nullptr);
145 xbt_dynar_t HostImpl::getAttachedStorageList()
147 xbt_lib_cursor_t cursor;
150 xbt_dynar_t result = xbt_dynar_new(sizeof(void*), nullptr);
151 xbt_lib_foreach(storage_lib, cursor, key, data)
153 if (xbt_lib_get_level(xbt_lib_get_elm_or_null(storage_lib, key), SURF_STORAGE_LEVEL) != nullptr) {
154 simgrid::surf::Storage* storage = static_cast<simgrid::surf::Storage*>(
155 xbt_lib_get_level(xbt_lib_get_elm_or_null(storage_lib, key), SURF_STORAGE_LEVEL));
156 if (!strcmp((const char*)storage->attach_, piface_->cname())) {
157 xbt_dynar_push_as(result, void*, (void*)storage->cname());
164 Action* HostImpl::open(const char* fullpath)
167 simgrid::surf::Storage* st = nullptr;
170 size_t longest_prefix_length = 0;
171 char* path = nullptr;
172 char* file_mount_name = nullptr;
173 char* mount_name = nullptr;
175 XBT_DEBUG("Search for storage name for '%s' on '%s'", fullpath, piface_->cname());
176 xbt_dynar_foreach (storage_, cursor, mnt) {
177 XBT_DEBUG("See '%s'", mnt.name);
178 file_mount_name = (char*)xbt_malloc((strlen(mnt.name) + 1));
179 strncpy(file_mount_name, fullpath, strlen(mnt.name) + 1);
180 file_mount_name[strlen(mnt.name)] = '\0';
182 if (!strcmp(file_mount_name, mnt.name) &&
183 strlen(mnt.name) > longest_prefix_length) { /* The current mount name is found in the full path and is
184 bigger than the previous*/
185 longest_prefix_length = strlen(mnt.name);
186 st = static_cast<simgrid::surf::Storage*>(mnt.storage);
188 free(file_mount_name);
190 if (longest_prefix_length > 0) { /* Mount point found, split fullpath into mount_name and path+filename*/
191 path = (char*)xbt_malloc((strlen(fullpath) - longest_prefix_length + 1));
192 mount_name = (char*)xbt_malloc((longest_prefix_length + 1));
193 strncpy(mount_name, fullpath, longest_prefix_length + 1);
194 strncpy(path, fullpath + longest_prefix_length, strlen(fullpath) - longest_prefix_length + 1);
195 path[strlen(fullpath) - longest_prefix_length] = '\0';
196 mount_name[longest_prefix_length] = '\0';
198 xbt_die("Can't find mount point for '%s' on '%s'", fullpath, piface_->cname());
200 XBT_DEBUG("OPEN %s on disk '%s'", path, st->cname());
201 Action* action = st->open((const char*)mount_name, (const char*)path);
203 free((char*)mount_name);
207 Action* HostImpl::close(surf_file_t fd)
209 simgrid::surf::Storage* st = findStorageOnMountList(fd->mount);
210 XBT_DEBUG("CLOSE %s on disk '%s'", fd->name, st->cname());
211 return st->close(fd);
214 Action* HostImpl::read(surf_file_t fd, sg_size_t size)
216 simgrid::surf::Storage* st = findStorageOnMountList(fd->mount);
217 XBT_DEBUG("READ %s on disk '%s'", fd->name, st->cname());
218 return st->read(fd, size);
221 Action* HostImpl::write(surf_file_t fd, sg_size_t size)
223 simgrid::surf::Storage* st = findStorageOnMountList(fd->mount);
224 XBT_DEBUG("WRITE %s on disk '%s'", fd->name, st->cname());
225 return st->write(fd, size);
228 int HostImpl::unlink(surf_file_t fd)
231 XBT_WARN("No such file descriptor. Impossible to unlink");
235 simgrid::surf::Storage* st = findStorageOnMountList(fd->mount);
236 /* Check if the file is on this storage */
237 if (!xbt_dict_get_or_null(st->content_, fd->name)) {
238 XBT_WARN("File %s is not on disk %s. Impossible to unlink", fd->name, st->cname());
241 XBT_DEBUG("UNLINK %s on disk '%s'", fd->name, st->cname());
242 st->usedSize_ -= fd->size;
244 // Remove the file from storage
245 xbt_dict_remove(st->content_, fd->name);
255 sg_size_t HostImpl::getSize(surf_file_t fd)
260 xbt_dynar_t HostImpl::getInfo(surf_file_t fd)
262 simgrid::surf::Storage* st = findStorageOnMountList(fd->mount);
263 sg_size_t* psize = xbt_new(sg_size_t, 1);
265 xbt_dynar_t info = xbt_dynar_new(sizeof(void*), nullptr);
266 xbt_dynar_push_as(info, sg_size_t*, psize);
267 xbt_dynar_push_as(info, void*, fd->mount);
268 xbt_dynar_push_as(info, void*, (void*)st->cname());
269 xbt_dynar_push_as(info, void*, st->typeId_);
270 xbt_dynar_push_as(info, void*, st->contentType_);
275 sg_size_t HostImpl::fileTell(surf_file_t fd)
277 return fd->current_position;
280 int HostImpl::fileSeek(surf_file_t fd, sg_offset_t offset, int origin)
285 fd->current_position = offset;
288 fd->current_position += offset;
291 fd->current_position = fd->size + offset;
298 int HostImpl::fileMove(surf_file_t fd, const char* fullpath)
300 /* Check if the new full path is on the same mount point */
301 if (!strncmp((const char*)fd->mount, fullpath, strlen(fd->mount))) {
302 sg_size_t* psize = (sg_size_t*)xbt_dict_get_or_null(findStorageOnMountList(fd->mount)->content_, fd->name);
303 if (psize) { // src file exists
304 sg_size_t* new_psize = xbt_new(sg_size_t, 1);
306 xbt_dict_remove(findStorageOnMountList(fd->mount)->content_, fd->name);
307 char* path = (char*)xbt_malloc((strlen(fullpath) - strlen(fd->mount) + 1));
308 strncpy(path, fullpath + strlen(fd->mount), strlen(fullpath) - strlen(fd->mount) + 1);
309 xbt_dict_set(findStorageOnMountList(fd->mount)->content_, path, new_psize, nullptr);
310 XBT_DEBUG("Move file from %s to %s, size '%llu'", fd->name, fullpath, *psize);
314 XBT_WARN("File %s doesn't exist", fd->name);
318 XBT_WARN("New full path %s is not on the same mount point: %s. Action has been canceled.", fullpath, fd->mount);