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 Action* HostModel::executeParallelTask(int host_nb, simgrid::s4u::Host** host_list, double* flops_amount,
55 double* bytes_amount, double rate)
58 #define has_cost(array,pos) ((array)?(array)[pos]:-1.0)
59 Action* action = nullptr;
60 if ((host_nb == 1) && (has_cost(bytes_amount, 0) <= 0)) {
61 action = host_list[0]->pimpl_cpu->execution_start(flops_amount[0]);
62 } else if ((host_nb == 1) && (has_cost(flops_amount, 0) <= 0)) {
63 action = surf_network_model->communicate(host_list[0], host_list[0], bytes_amount[0], rate);
64 } else if ((host_nb == 2) && (has_cost(flops_amount, 0) <= 0) && (has_cost(flops_amount, 1) <= 0)) {
68 for (int i = 0; i < host_nb * host_nb; i++) {
69 if (has_cost(bytes_amount, i) > 0.0) {
71 value = has_cost(bytes_amount, i);
75 action = surf_network_model->communicate(host_list[0], host_list[1], value, rate);
77 xbt_die("Cannot have a communication with no flop to exchange in this model. You should consider using the "
80 xbt_die("Cannot have a communication that is not a simple point-to-point in this model. You should consider "
81 "using the ptask model");
84 xbt_die("This model only accepts one of the following. You should consider using the ptask model for the other "
85 "cases.\n - execution with one host only and no communication\n - Self-comms with one host only\n - "
86 "Communications with two hosts and no computation");
96 HostImpl::HostImpl(s4u::Host* host) : piface_(host)
98 /* The VM wants to reinstall a new HostImpl, but we don't want to leak the previously existing one */
99 delete piface_->pimpl_;
100 piface_->pimpl_ = this;
103 /** @brief use destroy() instead of this destructor */
104 HostImpl::~HostImpl() = default;
106 simgrid::surf::Storage* HostImpl::findStorageOnMountList(const char* mount)
108 simgrid::surf::Storage* st = nullptr;
112 XBT_DEBUG("Search for storage name '%s' on '%s'", mount, piface_->cname());
113 xbt_dynar_foreach (storage_, cursor, mnt) {
114 XBT_DEBUG("See '%s'", mnt.name);
115 if (!strcmp(mount, mnt.name)) {
116 st = static_cast<simgrid::surf::Storage*>(mnt.storage);
121 xbt_die("Can't find mount '%s' for '%s'", mount, piface_->cname());
125 xbt_dict_t HostImpl::getMountedStorageList()
129 xbt_dict_t storage_list = xbt_dict_new_homogeneous(nullptr);
130 char* storage_name = nullptr;
132 xbt_dynar_foreach (storage_, i, mnt) {
133 storage_name = (char*)static_cast<simgrid::surf::Storage*>(mnt.storage)->cname();
134 xbt_dict_set(storage_list, mnt.name, storage_name, nullptr);
139 xbt_dynar_t HostImpl::getAttachedStorageList()
141 xbt_lib_cursor_t cursor;
144 xbt_dynar_t result = xbt_dynar_new(sizeof(void*), nullptr);
145 xbt_lib_foreach(storage_lib, cursor, key, data)
147 if (xbt_lib_get_level(xbt_lib_get_elm_or_null(storage_lib, key), SURF_STORAGE_LEVEL) != nullptr) {
148 simgrid::surf::Storage* storage = static_cast<simgrid::surf::Storage*>(
149 xbt_lib_get_level(xbt_lib_get_elm_or_null(storage_lib, key), SURF_STORAGE_LEVEL));
150 if (!strcmp((const char*)storage->attach_, piface_->cname())) {
151 xbt_dynar_push_as(result, void*, (void*)storage->cname());
158 Action* HostImpl::open(const char* fullpath)
161 simgrid::surf::Storage* st = nullptr;
164 size_t longest_prefix_length = 0;
165 char* path = nullptr;
166 char* file_mount_name = nullptr;
167 char* mount_name = nullptr;
169 XBT_DEBUG("Search for storage name for '%s' on '%s'", fullpath, piface_->cname());
170 xbt_dynar_foreach (storage_, cursor, mnt) {
171 XBT_DEBUG("See '%s'", mnt.name);
172 file_mount_name = (char*)xbt_malloc((strlen(mnt.name) + 1));
173 strncpy(file_mount_name, fullpath, strlen(mnt.name) + 1);
174 file_mount_name[strlen(mnt.name)] = '\0';
176 if (!strcmp(file_mount_name, mnt.name) &&
177 strlen(mnt.name) > longest_prefix_length) { /* The current mount name is found in the full path and is
178 bigger than the previous*/
179 longest_prefix_length = strlen(mnt.name);
180 st = static_cast<simgrid::surf::Storage*>(mnt.storage);
182 free(file_mount_name);
184 if (longest_prefix_length > 0) { /* Mount point found, split fullpath into mount_name and path+filename*/
185 path = (char*)xbt_malloc((strlen(fullpath) - longest_prefix_length + 1));
186 mount_name = (char*)xbt_malloc((longest_prefix_length + 1));
187 strncpy(mount_name, fullpath, longest_prefix_length + 1);
188 strncpy(path, fullpath + longest_prefix_length, strlen(fullpath) - longest_prefix_length + 1);
189 path[strlen(fullpath) - longest_prefix_length] = '\0';
190 mount_name[longest_prefix_length] = '\0';
192 xbt_die("Can't find mount point for '%s' on '%s'", fullpath, piface_->cname());
194 XBT_DEBUG("OPEN %s on disk '%s'", path, st->cname());
195 Action* action = st->open((const char*)mount_name, (const char*)path);
197 free((char*)mount_name);
201 Action* HostImpl::close(surf_file_t fd)
203 simgrid::surf::Storage* st = findStorageOnMountList(fd->mount);
204 XBT_DEBUG("CLOSE %s on disk '%s'", fd->name, st->cname());
205 return st->close(fd);
208 Action* HostImpl::read(surf_file_t fd, sg_size_t size)
210 simgrid::surf::Storage* st = findStorageOnMountList(fd->mount);
211 XBT_DEBUG("READ %s on disk '%s'", fd->name, st->cname());
212 return st->read(fd, size);
215 Action* HostImpl::write(surf_file_t fd, sg_size_t size)
217 simgrid::surf::Storage* st = findStorageOnMountList(fd->mount);
218 XBT_DEBUG("WRITE %s on disk '%s'", fd->name, st->cname());
219 return st->write(fd, size);
222 int HostImpl::unlink(surf_file_t fd)
225 XBT_WARN("No such file descriptor. Impossible to unlink");
229 simgrid::surf::Storage* st = findStorageOnMountList(fd->mount);
230 /* Check if the file is on this storage */
231 if (!xbt_dict_get_or_null(st->content_, fd->name)) {
232 XBT_WARN("File %s is not on disk %s. Impossible to unlink", fd->name, st->cname());
235 XBT_DEBUG("UNLINK %s on disk '%s'", fd->name, st->cname());
236 st->usedSize_ -= fd->size;
238 // Remove the file from storage
239 xbt_dict_remove(st->content_, fd->name);
249 sg_size_t HostImpl::getSize(surf_file_t fd)
254 xbt_dynar_t HostImpl::getInfo(surf_file_t fd)
256 simgrid::surf::Storage* st = findStorageOnMountList(fd->mount);
257 sg_size_t* psize = xbt_new(sg_size_t, 1);
259 xbt_dynar_t info = xbt_dynar_new(sizeof(void*), nullptr);
260 xbt_dynar_push_as(info, sg_size_t*, psize);
261 xbt_dynar_push_as(info, void*, fd->mount);
262 xbt_dynar_push_as(info, void*, (void*)st->cname());
263 xbt_dynar_push_as(info, void*, st->typeId_);
264 xbt_dynar_push_as(info, void*, st->contentType_);
269 sg_size_t HostImpl::fileTell(surf_file_t fd)
271 return fd->current_position;
274 int HostImpl::fileSeek(surf_file_t fd, sg_offset_t offset, int origin)
279 fd->current_position = offset;
282 fd->current_position += offset;
285 fd->current_position = fd->size + offset;
292 int HostImpl::fileMove(surf_file_t fd, const char* fullpath)
294 /* Check if the new full path is on the same mount point */
295 if (!strncmp((const char*)fd->mount, fullpath, strlen(fd->mount))) {
296 sg_size_t* psize = (sg_size_t*)xbt_dict_get_or_null(findStorageOnMountList(fd->mount)->content_, fd->name);
297 if (psize) { // src file exists
298 sg_size_t* new_psize = xbt_new(sg_size_t, 1);
300 xbt_dict_remove(findStorageOnMountList(fd->mount)->content_, fd->name);
301 char* path = (char*)xbt_malloc((strlen(fullpath) - strlen(fd->mount) + 1));
302 strncpy(path, fullpath + strlen(fd->mount), strlen(fullpath) - strlen(fd->mount) + 1);
303 xbt_dict_set(findStorageOnMountList(fd->mount)->content_, path, new_psize, nullptr);
304 XBT_DEBUG("Move file from %s to %s, size '%llu'", fd->name, fullpath, *psize);
308 XBT_WARN("File %s doesn't exist", fd->name);
312 XBT_WARN("New full path %s is not on the same mount point: %s. Action has been canceled.", fullpath, fd->mount);