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/VirtualMachineImpl.hpp"
12 #include "xbt/asserts.hpp"
16 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(res_host, ker_resource, "Host resources agregate CPU, networking and I/O features");
22 namespace simgrid::kernel::resource {
30 HostImpl::HostImpl(const std::string& name) : piface_(this), name_(name)
32 xbt_enforce(s4u::Host::by_name_or_null(name_) == nullptr, "Refusing to create a second host named '%s'.",
38 /* All actors should be gone when the host is turned off (by the end of the simulation). */
39 if (not actor_list_.empty()) {
40 const char* msg = "Shutting down host, but it's not empty";
43 for (auto const& actor : actor_list_)
44 actors += "\n\t" + actor.get_name();
46 EngineImpl::get_instance()->display_all_actor_status();
47 xbt_die("%s:%s", msg, actors.c_str());
48 } catch (const std::bad_alloc& ba) {
49 xbt_die("%s (cannot print actor list: %s)", msg, ba.what());
52 for (auto const& arg : actors_at_boot_)
54 actors_at_boot_.clear();
56 for (auto const& [_, d] : disks_)
59 for (auto const& [_, vm] : vms_)
63 /** @brief Fire the required callbacks and destroy the object
65 * Don't delete directly a Host, call h->destroy() instead.
67 void HostImpl::destroy()
69 s4u::Host::on_destruction(*this->get_iface());
73 /** Re-starts all the actors that are marked as restartable.
75 * Weird things will happen if you turn on a host that is already on. S4U is fool-proof, not this.
77 void HostImpl::turn_on() const
79 for (auto const& arg : actors_at_boot_) {
80 XBT_DEBUG("Booting Actor %s(%s) right now", arg->name.c_str(), arg->host->get_cname());
81 actor::ActorImplPtr actor = actor::ActorImpl::create(arg);
85 /** Kill all actors hosted here */
86 void HostImpl::turn_off(const actor::ActorImpl* issuer)
88 /* turn_off VMs running on host */
89 for (const auto& [_, vm] : vms_) {
90 // call s4u functions to generate the good on_state_change signal, maybe one day this wont be necessary
91 vm->get_iface()->shutdown();
92 vm->get_iface()->turn_off();
94 for (auto& actor : actor_list_) {
95 XBT_DEBUG("Killing Actor %s@%s on behalf of %s which turned off that host.", actor.get_cname(),
96 actor.get_host()->get_cname(), issuer->get_cname());
99 for (const auto& activity : EngineImpl::get_instance()->get_maestro()->activities_) {
100 auto const& hosts = activity->get_hosts();
101 if (std::find(hosts.begin(), hosts.end(), &piface_) != hosts.end()) {
103 activity->set_state(activity::State::FAILED);
106 // When a host is turned off, we want to keep only the actors that should restart for when it will boot again.
107 // Then get rid of the others.
108 auto elm = remove_if(begin(actors_at_boot_), end(actors_at_boot_), [](const actor::ProcessArg* arg) {
109 if (arg->auto_restart)
114 actors_at_boot_.erase(elm, end(actors_at_boot_));
117 HostImpl* HostImpl::set_englobing_zone(routing::NetZoneImpl* englobing_zone)
119 englobing_zone_ = englobing_zone;
123 std::vector<s4u::ActorPtr> HostImpl::get_all_actors()
125 std::vector<s4u::ActorPtr> res;
126 for (auto& actor : actor_list_)
127 res.emplace_back(actor.get_ciface());
130 size_t HostImpl::get_actor_count() const
132 return actor_list_.size();
135 std::vector<s4u::Disk*> HostImpl::get_disks() const
137 std::vector<s4u::Disk*> disks;
138 for (auto const& [_, d] : disks_)
139 disks.push_back(d->get_iface());
143 s4u::VirtualMachine* HostImpl::create_vm(const std::string& name, int core_amount, size_t ramsize)
145 auto* host_vm = new kernel::resource::VirtualMachineImpl(name, get_iface(), core_amount, ramsize);
146 auto* vm = new s4u::VirtualMachine(host_vm);
147 host_vm->set_piface(vm);
148 return create_vm(name, vm);
151 s4u::VirtualMachine* HostImpl::create_vm(const std::string& name, s4u::VirtualMachine* vm)
153 vms_[name] = vm->get_vm_impl();
155 // Create a VCPU for this VM
156 std::vector<double> speeds;
157 for (unsigned long i = 0; i < get_iface()->get_pstate_count(); i++)
158 speeds.push_back(get_iface()->get_pstate_speed(i));
161 englobing_zone_->get_cpu_vm_model()->create_cpu(vm, speeds)->set_core_count(vm->get_vm_impl()->get_core_amount());
165 if (get_iface()->get_pstate() != 0) {
166 cpu->set_pstate(get_iface()->get_pstate());
169 /* Currently, a VM uses the network resource of its physical host */
170 vm->set_netpoint(get_iface()->get_netpoint());
177 void HostImpl::move_vm(VirtualMachineImpl* vm, HostImpl* destination)
179 xbt_assert(vm && destination);
181 vms_.erase(vm->get_name());
182 destination->vms_[vm->get_name()] = vm;
185 void HostImpl::destroy_vm(const std::string& name)
187 auto* vm = vms_[name];
192 VirtualMachineImpl* HostImpl::get_vm_by_name_or_null(const std::string& name) const
194 auto vm_it = vms_.find(name);
195 return vm_it == vms_.end() ? nullptr : vm_it->second;
198 std::vector<s4u::VirtualMachine*> HostImpl::get_vms() const
200 std::vector<s4u::VirtualMachine*> vms;
201 for (const auto& [_, vm] : vms_) {
202 vms.push_back(vm->get_iface());
207 s4u::Disk* HostImpl::create_disk(const std::string& name, double read_bandwidth, double write_bandwidth)
209 auto disk = piface_.get_netpoint()->get_englobing_zone()->get_disk_model()->create_disk(name, read_bandwidth,
213 return disk->set_host(&piface_)->get_iface();
216 void HostImpl::add_disk(const s4u::Disk* disk)
218 disks_[disk->get_name()] = disk->get_impl();
221 void HostImpl::remove_disk(const std::string& name)
226 void HostImpl::seal()
232 get_iface()->get_cpu()->seal();
236 for (auto const& [_, disk] : disks_)
240 for (auto const& [_, vm] : vms_)
243 } // namespace simgrid::kernel::resource