1 /* Copyright (c) 2013-2023. 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 <simgrid/kernel/routing/NetPoint.hpp>
7 #include <simgrid/s4u/Engine.hpp>
8 #include <simgrid/s4u/Host.hpp>
10 #include "src/kernel/EngineImpl.hpp"
11 #include "src/kernel/resource/NetworkModel.hpp"
12 #include "src/kernel/resource/VirtualMachineImpl.hpp"
13 #include "xbt/asserts.hpp"
17 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(res_host, ker_resource, "Host resources agregate CPU, networking and I/O features");
23 namespace simgrid::kernel::resource {
28 Action* HostModel::io_stream(s4u::Host* src_host, DiskImpl* src_disk, s4u::Host* dst_host, DiskImpl* dst_disk,
31 auto* net_model = src_host->get_englobing_zone()->get_network_model();
32 auto* system = net_model->get_maxmin_system();
33 auto* action = net_model->communicate(src_host, dst_host, size, -1, true);
35 // We don't want to apply the network model bandwidth factor to the I/O constraints
36 double bw_factor = net_model->get_bandwidth_factor();
37 if (src_disk != nullptr) {
38 // FIXME: if the stream starts from a disk, we might not want to pay the network latency
39 system->expand(src_disk->get_constraint(), action->get_variable(), bw_factor);
40 system->expand(src_disk->get_read_constraint(), action->get_variable(), bw_factor);
42 if (dst_disk != nullptr) {
43 system->expand(dst_disk->get_constraint(), action->get_variable(), bw_factor);
44 system->expand(dst_disk->get_write_constraint(), action->get_variable(), bw_factor);
53 HostImpl::HostImpl(const std::string& name) : piface_(this), name_(name)
55 xbt_enforce(s4u::Host::by_name_or_null(name_) == nullptr, "Refusing to create a second host named '%s'.",
61 /* All actors should be gone when the host is turned off (by the end of the simulation). */
62 if (not actor_list_.empty()) {
63 const char* msg = "Shutting down host, but it's not empty";
66 for (auto const& actor : actor_list_)
67 actors += "\n\t" + actor.get_name();
69 EngineImpl::get_instance()->display_all_actor_status();
70 xbt_die("%s:%s", msg, actors.c_str());
71 } catch (const std::bad_alloc& ba) {
72 xbt_die("%s (cannot print actor list: %s)", msg, ba.what());
75 for (auto const& arg : actors_at_boot_)
77 actors_at_boot_.clear();
79 for (auto const& [_, vm] : vms_)
83 /** @brief Fire the required callbacks and destroy the object
85 * Don't delete directly a Host, call h->destroy() instead.
87 void HostImpl::destroy()
89 s4u::Host::on_destruction(*this->get_iface());
90 this->get_iface()->on_this_destruction(*this->get_iface());
94 /** Re-starts all the actors that are marked as restartable.
96 * Weird things will happen if you turn on a host that is already on. S4U is fool-proof, not this.
98 void HostImpl::turn_on() const
100 for (auto const& arg : actors_at_boot_) {
101 XBT_DEBUG("Booting Actor %s(%s) right now", arg->name.c_str(), arg->host->get_cname());
102 actor::ActorImplPtr actor = actor::ActorImpl::create(arg);
106 /** Kill all actors hosted here */
107 void HostImpl::turn_off(const actor::ActorImpl* issuer)
109 /* turn_off VMs running on host */
110 for (const auto& [_, vm] : vms_) {
111 // call s4u functions to generate the good on_state_change signal, maybe one day this wont be necessary
112 vm->get_iface()->shutdown();
113 vm->get_iface()->turn_off();
115 for (auto& actor : actor_list_) {
116 XBT_DEBUG("Killing Actor %s@%s on behalf of %s which turned off that host.", actor.get_cname(),
117 actor.get_host()->get_cname(), issuer->get_cname());
118 issuer->kill(&actor);
120 for (const auto& activity : EngineImpl::get_instance()->get_maestro()->activities_) {
121 auto const& hosts = activity->get_hosts();
122 if (std::find(hosts.begin(), hosts.end(), &piface_) != hosts.end()) {
124 activity->set_state(activity::State::FAILED);
127 // When a host is turned off, we want to keep only the actors that should restart for when it will boot again.
128 // Then get rid of the others.
129 auto elm = remove_if(begin(actors_at_boot_), end(actors_at_boot_), [](const actor::ProcessArg* arg) {
130 if (arg->auto_restart)
135 actors_at_boot_.erase(elm, end(actors_at_boot_));
138 HostImpl* HostImpl::set_englobing_zone(routing::NetZoneImpl* englobing_zone)
140 englobing_zone_ = englobing_zone;
144 std::vector<s4u::ActorPtr> HostImpl::get_all_actors()
146 std::vector<s4u::ActorPtr> res;
147 for (auto& actor : actor_list_)
148 res.emplace_back(actor.get_ciface());
152 size_t HostImpl::get_actor_count() const
154 return actor_list_.size();
157 std::vector<s4u::Disk*> HostImpl::get_disks() const
159 std::vector<s4u::Disk*> disks;
160 for (auto const& [_, d] : disks_)
161 disks.push_back(d->get_iface());
165 s4u::VirtualMachine* HostImpl::create_vm(const std::string& name, int core_amount, size_t ramsize)
167 auto* host_vm = new kernel::resource::VirtualMachineImpl(name, get_iface(), core_amount, ramsize);
168 auto* vm = new s4u::VirtualMachine(host_vm);
169 host_vm->set_piface(vm);
170 return create_vm(name, vm);
173 s4u::VirtualMachine* HostImpl::create_vm(const std::string& name, s4u::VirtualMachine* vm)
175 vms_[name] = vm->get_vm_impl();
177 // Create a VCPU for this VM
178 std::vector<double> speeds;
179 for (unsigned long i = 0; i < get_iface()->get_pstate_count(); i++)
180 speeds.push_back(get_iface()->get_pstate_speed(i));
183 englobing_zone_->get_cpu_vm_model()->create_cpu(vm, speeds)->set_core_count(vm->get_vm_impl()->get_core_amount());
187 if (get_iface()->get_pstate() != 0) {
188 cpu->set_pstate(get_iface()->get_pstate());
191 /* Currently, a VM uses the network resource of its physical host */
192 vm->set_netpoint(get_iface()->get_netpoint());
199 void HostImpl::move_vm(VirtualMachineImpl* vm, HostImpl* destination)
201 xbt_assert(vm && destination);
203 vms_.erase(vm->get_name());
204 destination->vms_[vm->get_name()] = vm;
207 void HostImpl::destroy_vm(const std::string& name)
209 auto* vm = vms_[name];
214 VirtualMachineImpl* HostImpl::get_vm_by_name_or_null(const std::string& name) const
216 auto vm_it = vms_.find(name);
217 return vm_it == vms_.end() ? nullptr : vm_it->second;
220 std::vector<s4u::VirtualMachine*> HostImpl::get_vms() const
222 std::vector<s4u::VirtualMachine*> vms;
223 for (const auto& [_, vm] : vms_) {
224 vms.push_back(vm->get_iface());
229 s4u::Disk* HostImpl::create_disk(const std::string& name, double read_bandwidth, double write_bandwidth)
231 auto* disk = piface_.get_netpoint()->get_englobing_zone()->get_disk_model()->create_disk(name, read_bandwidth,
235 return disk->set_host(&piface_)->get_iface();
238 void HostImpl::add_disk(const s4u::Disk* disk)
240 disks_[disk->get_name()] = kernel::resource::DiskImplPtr(disk->get_impl());
243 void HostImpl::remove_disk(const std::string& name)
248 void HostImpl::seal()
254 get_iface()->get_cpu()->seal();
258 for (auto const& [_, disk] : disks_)
262 for (auto const& [_, vm] : vms_)
265 } // namespace simgrid::kernel::resource