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_DEBUG("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)
52 Action* HostModel::executeParallelTask(int host_nb, simgrid::s4u::Host** host_list, double* flops_amount,
53 double* bytes_amount, double rate)
55 Action* action = nullptr;
56 if ((host_nb == 1) && (has_cost(bytes_amount, 0) <= 0)) {
57 action = host_list[0]->pimpl_cpu->execution_start(flops_amount[0]);
58 } else if ((host_nb == 1) && (has_cost(flops_amount, 0) <= 0)) {
59 action = surf_network_model->communicate(host_list[0], host_list[0], bytes_amount[0], rate);
60 } else if ((host_nb == 2) && (has_cost(flops_amount, 0) <= 0) && (has_cost(flops_amount, 1) <= 0)) {
64 for (int i = 0; i < host_nb * host_nb; i++) {
65 if (has_cost(bytes_amount, i) > 0.0) {
67 value = has_cost(bytes_amount, i);
71 action = surf_network_model->communicate(host_list[0], host_list[1], value, rate);
73 xbt_die("Cannot have a communication with no flop to exchange in this model. You should consider using the "
76 xbt_die("Cannot have a communication that is not a simple point-to-point in this model. You should consider "
77 "using the ptask model");
81 "This model only accepts one of the following. You should consider using the ptask model for the other cases.\n"
82 " - execution with one host only and no communication\n"
83 " - Self-comms with one host only\n"
84 " - Communications with two hosts and no computation");
92 HostImpl::HostImpl(s4u::Host* host) : piface_(host)
94 /* The VM wants to reinstall a new HostImpl, but we don't want to leak the previously existing one */
95 delete piface_->pimpl_;
96 piface_->pimpl_ = this;
99 simgrid::surf::StorageImpl* HostImpl::findStorageOnMountList(const char* mount)
101 XBT_DEBUG("Search for storage name '%s' on '%s'", mount, piface_->cname());
102 if (storage_.find(mount) == storage_.end())
103 xbt_die("Can't find mount '%s' for '%s'", mount, piface_->cname());
105 return storage_.at(mount);
108 void HostImpl::getAttachedStorageList(std::vector<const char*>* storages)
110 for (auto s : storage_)
111 if (s.second->attach_ == piface_->cname())
112 storages->push_back(s.second->piface_.name());
115 Action* HostImpl::close(surf_file_t fd)
117 simgrid::surf::StorageImpl* st = findStorageOnMountList(fd->mount);
118 XBT_DEBUG("CLOSE %s on disk '%s'", fd->name, st->cname());
119 return st->close(fd);
122 Action* HostImpl::read(surf_file_t fd, sg_size_t size)
124 simgrid::surf::StorageImpl* st = findStorageOnMountList(fd->mount);
125 XBT_DEBUG("READ %s on disk '%s'", fd->name, st->cname());
126 return st->read(fd, size);
129 Action* HostImpl::write(surf_file_t fd, sg_size_t size)
131 simgrid::surf::StorageImpl* st = findStorageOnMountList(fd->mount);
132 XBT_DEBUG("WRITE %s on disk '%s'", fd->name, st->cname());
133 return st->write(fd, size);
136 int HostImpl::unlink(surf_file_t fd)
139 XBT_WARN("No such file descriptor. Impossible to unlink");
143 simgrid::surf::StorageImpl* st = findStorageOnMountList(fd->mount);
144 /* Check if the file is on this storage */
145 if (st->content_->find(fd->name) == st->content_->end()) {
146 XBT_WARN("File %s is not on disk %s. Impossible to unlink", fd->name, st->cname());
149 XBT_DEBUG("UNLINK %s on disk '%s'", fd->name, st->cname());
150 st->usedSize_ -= fd->size;
152 // Remove the file from storage
153 st->content_->erase(fd->name);
163 sg_size_t HostImpl::getSize(surf_file_t fd)
168 sg_size_t HostImpl::fileTell(surf_file_t fd)
170 return fd->current_position;
173 int HostImpl::fileSeek(surf_file_t fd, sg_offset_t offset, int origin)
177 fd->current_position = offset;
180 fd->current_position += offset;
183 fd->current_position = fd->size + offset;
190 int HostImpl::fileMove(surf_file_t fd, const char* fullpath)
192 /* Check if the new full path is on the same mount point */
193 if (not strncmp((const char*)fd->mount, fullpath, strlen(fd->mount))) {
194 std::map<std::string, sg_size_t>* content = findStorageOnMountList(fd->mount)->content_;
195 if (content->find(fd->name) != content->end()) { // src file exists
196 sg_size_t new_size = content->at(std::string(fd->name));
197 content->erase(fd->name);
198 std::string path = std::string(fullpath).substr(strlen(fd->mount), strlen(fullpath));
199 content->insert({path.c_str(), new_size});
200 XBT_DEBUG("Move file from %s to %s, size '%llu'", fd->name, fullpath, new_size);
203 XBT_WARN("File %s doesn't exist", fd->name);
207 XBT_WARN("New full path %s is not on the same mount point: %s. Action has been canceled.", fullpath, fd->mount);