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"
7 #include "src/surf/FileImpl.hpp"
10 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_host, surf, "Logging specific to the SURF host module");
12 simgrid::surf::HostModel *surf_host_model = nullptr;
25 /* Each VM has a dummy CPU action on the PM layer. This CPU action works as the
26 * constraint (capacity) of the VM in the PM layer. If the VM does not have any
27 * active task, the dummy CPU action must be deactivated, so that the VM does
28 * not get any CPU share in the PM layer. */
29 void HostModel::ignoreEmptyVmInPmLMM()
31 /* iterate for all virtual machines */
32 for (s4u::VirtualMachine* ws_vm : vm::VirtualMachineImpl::allVms_) {
33 Cpu* cpu = ws_vm->pimpl_cpu;
34 int active_tasks = lmm_constraint_get_variable_amount(cpu->constraint());
36 /* The impact of the VM over its PM is the min between its vCPU amount and the amount of tasks it contains */
37 int impact = std::min(active_tasks, ws_vm->pimpl_vm_->coreAmount());
39 XBT_DEBUG("set the weight of the dummy CPU action of VM%p on PM to %d (#tasks: %d)", ws_vm, impact, active_tasks);
40 ws_vm->pimpl_vm_->action_->setPriority(impact);
44 /* Helper function for executeParallelTask */
45 static inline double has_cost(double* array, int pos)
53 Action* HostModel::executeParallelTask(int host_nb, simgrid::s4u::Host** host_list, double* flops_amount,
54 double* bytes_amount, double rate)
56 Action* action = nullptr;
57 if ((host_nb == 1) && (has_cost(bytes_amount, 0) <= 0)) {
58 action = host_list[0]->pimpl_cpu->execution_start(flops_amount[0]);
59 } else if ((host_nb == 1) && (has_cost(flops_amount, 0) <= 0)) {
60 action = surf_network_model->communicate(host_list[0], host_list[0], bytes_amount[0], rate);
61 } else if ((host_nb == 2) && (has_cost(flops_amount, 0) <= 0) && (has_cost(flops_amount, 1) <= 0)) {
65 for (int i = 0; i < host_nb * host_nb; i++) {
66 if (has_cost(bytes_amount, i) > 0.0) {
68 value = has_cost(bytes_amount, i);
72 action = surf_network_model->communicate(host_list[0], host_list[1], value, rate);
74 xbt_die("Cannot have a communication with no flop to exchange in this model. You should consider using the "
77 xbt_die("Cannot have a communication that is not a simple point-to-point in this model. You should consider "
78 "using the ptask model");
82 "This model only accepts one of the following. You should consider using the ptask model for the other cases.\n"
83 " - execution with one host only and no communication\n"
84 " - Self-comms with one host only\n"
85 " - Communications with two hosts and no computation");
93 HostImpl::HostImpl(s4u::Host* host) : piface_(host)
95 /* The VM wants to reinstall a new HostImpl, but we don't want to leak the previously existing one */
96 delete piface_->pimpl_;
97 piface_->pimpl_ = this;
100 simgrid::surf::StorageImpl* HostImpl::findStorageOnMountList(const char* mount)
102 XBT_DEBUG("Search for storage name '%s' on '%s'", mount, piface_->cname());
103 if (storage_.find(mount) == storage_.end())
104 xbt_die("Can't find mount '%s' for '%s'", mount, piface_->cname());
106 return storage_.at(mount);
109 void HostImpl::getAttachedStorageList(std::vector<const char*>* storages)
111 for (auto s : storage_)
112 if (s.second->attach_ == piface_->cname())
113 storages->push_back(s.second->piface_.name());
116 Action* HostImpl::close(surf_file_t fd)
118 simgrid::surf::StorageImpl* st = findStorageOnMountList(fd->mount());
119 XBT_DEBUG("CLOSE %s on disk '%s'", fd->cname(), st->cname());
120 return st->close(fd);
123 Action* HostImpl::read(surf_file_t fd, sg_size_t size)
125 simgrid::surf::StorageImpl* st = findStorageOnMountList(fd->mount());
126 XBT_DEBUG("READ %s on disk '%s'", fd->cname(), st->cname());
127 return st->read(fd, size);
130 Action* HostImpl::write(surf_file_t fd, sg_size_t size)
132 simgrid::surf::StorageImpl* st = findStorageOnMountList(fd->mount());
133 XBT_DEBUG("WRITE %s on disk '%s'", fd->cname(), st->cname());
134 return st->write(fd, size);
137 int HostImpl::unlink(surf_file_t fd)
140 XBT_WARN("No such file descriptor. Impossible to unlink");
144 simgrid::surf::StorageImpl* st = findStorageOnMountList(fd->mount());
145 /* Check if the file is on this storage */
146 if (st->content_->find(fd->cname()) == st->content_->end()) {
147 XBT_WARN("File %s is not on disk %s. Impossible to unlink", fd->cname(), st->cname());
150 XBT_DEBUG("UNLINK %s on disk '%s'", fd->cname(), st->cname());
151 st->usedSize_ -= fd->size();
153 // Remove the file from storage
154 st->content_->erase(fd->cname());
161 int HostImpl::fileSeek(surf_file_t fd, sg_offset_t offset, int origin)
165 fd->setPosition(offset);
168 fd->incrPosition(offset);
171 fd->setPosition(fd->size() + offset);
178 int HostImpl::fileMove(surf_file_t fd, const char* fullpath)
180 /* Check if the new full path is on the same mount point */
181 if (not strncmp(fd->mount(), fullpath, strlen(fd->mount()))) {
182 std::map<std::string, sg_size_t>* content = findStorageOnMountList(fd->mount())->content_;
183 if (content->find(fd->name()) != content->end()) { // src file exists
184 sg_size_t new_size = content->at(fd->name());
185 content->erase(fd->name());
186 std::string path = std::string(fullpath).substr(strlen(fd->mount()), strlen(fullpath));
187 content->insert({path.c_str(), new_size});
188 XBT_DEBUG("Move file from %s to %s, size '%llu'", fd->cname(), fullpath, new_size);
191 XBT_WARN("File %s doesn't exist", fd->cname());
195 XBT_WARN("New full path %s is not on the same mount point: %s. Action has been canceled.", fullpath, fd->mount());