1 /* Copyright (c) 2015-2023. 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 #ifndef SIMGRID_S4U_VM_HPP
7 #define SIMGRID_S4U_VM_HPP
9 #include <simgrid/forward.h>
10 #include <simgrid/s4u/Host.hpp>
11 #include <xbt/utility.hpp>
13 namespace simgrid::s4u {
15 /** @brief Host extension for the VMs */
18 static xbt::Extension<s4u::Host, VmHostExt> EXTENSION_ID;
20 sg_size_t ramsize = 0; /* available ramsize (0= not taken into account) */
21 bool overcommit = true; /* Whether the host allows overcommiting more VM than the avail ramsize allows */
22 static void ensureVmExtInstalled();
29 * A VM represents a virtual machine (or a container) that hosts actors.
30 * The total computing power that the contained actors can get is constrained to the virtual machine size.
33 class XBT_PUBLIC VirtualMachine : public s4u::Host {
34 kernel::resource::VirtualMachineImpl* const pimpl_vm_;
36 /* Signals about the life cycle of the VM */
37 static xbt::signal<void(VirtualMachine&)> on_vm_creation;
38 static xbt::signal<void(VirtualMachine const&)> on_start;
39 xbt::signal<void(VirtualMachine const&)> on_this_start;
40 static xbt::signal<void(VirtualMachine const&)> on_started;
41 xbt::signal<void(VirtualMachine const&)> on_this_started;
42 static xbt::signal<void(VirtualMachine const&)> on_shutdown;
43 xbt::signal<void(VirtualMachine const&)> on_this_shutdown;
44 static xbt::signal<void(VirtualMachine const&)> on_suspend;
45 xbt::signal<void(VirtualMachine const&)> on_this_suspend;
46 static xbt::signal<void(VirtualMachine const&)> on_resume;
47 xbt::signal<void(VirtualMachine const&)> on_this_resume;
48 static xbt::signal<void(VirtualMachine const&)> on_migration_start;
49 xbt::signal<void(VirtualMachine const&)> on_this_migration_start;
50 static xbt::signal<void(VirtualMachine const&)> on_migration_end;
51 xbt::signal<void(VirtualMachine const&)> on_this_migration_end;
52 static xbt::signal<void(VirtualMachine const&)> on_vm_destruction;
53 xbt::signal<void(VirtualMachine const&)> on_this_vm_destruction;
56 friend kernel::resource::VirtualMachineImpl; // calls signals from Impl
57 friend kernel::resource::HostImpl; // call private constructor
58 explicit VirtualMachine(kernel::resource::VirtualMachineImpl* impl);
64 VirtualMachine(VirtualMachine const&) = delete;
65 VirtualMachine& operator=(VirtualMachine const&) = delete;
68 // enum class State { ... }
69 XBT_DECLARE_ENUM_CLASS(State,
70 CREATED, /**< created, but not yet started */
72 SUSPENDED, /**< Suspend/resume does not involve disk I/O, so we assume there is no transition states. */
76 kernel::resource::VirtualMachineImpl* get_vm_impl() const { return pimpl_vm_; }
81 void destroy() override;
84 VirtualMachine* set_pm(Host* pm);
85 size_t get_ramsize() const;
86 VirtualMachine* set_ramsize(size_t ramsize);
87 VirtualMachine* set_bound(double bound);
88 void start_migration() const;
89 void end_migration() const;
91 State get_state() const;
93 /* Callbacks on signals */
94 /*! \static Add a callback fired when any VM is created */
95 static void on_creation_cb(const std::function<void(VirtualMachine&)>& cb) { on_vm_creation.connect(cb); }
96 /*! \static Add a callback fired when any VM starts */
97 static void on_start_cb(const std::function<void(VirtualMachine const&)>& cb) { on_start.connect(cb); }
98 /*! Add a callback fired when this specific VM starts */
99 void on_this_start_cb(const std::function<void(VirtualMachine const&)>& cb)
101 on_this_start.connect(cb);
103 /*! \static Add a callback fired when any VM is actually started */
104 static void on_started_cb(const std::function<void(VirtualMachine const&)>& cb) { on_started.connect(cb); }
105 /*! Add a callback fired when this specific VM is actually started */
106 void on_this_started_cb(const std::function<void(VirtualMachine const&)>& cb)
108 on_this_started.connect(cb);
110 /*! \static Add a callback fired when any VM is shut down */
111 static void on_shutdown_cb(const std::function<void(VirtualMachine const&)>& cb) { on_shutdown.connect(cb); }
112 /*! Add a callback fired when this specific VM is shut down */
113 void on_this_shutdown_cb(const std::function<void(VirtualMachine const&)>& cb)
115 on_this_shutdown.connect(cb);
117 /*! \static Add a callback fired when any VM is suspended*/
118 static void on_suspend_cb(const std::function<void(VirtualMachine const&)>& cb) { on_suspend.connect(cb); }
119 /*! Add a callback fired when this specific VM is suspended*/
120 void on_this_suspend_cb(const std::function<void(VirtualMachine const&)>& cb)
122 on_this_suspend.connect(cb);
124 /*! \static Add a callback fired when any VM is resumed*/
125 static void on_resume_cb(const std::function<void(VirtualMachine const&)>& cb) { on_resume.connect(cb); }
126 /*! Add a callback fired when this specific VM is resumed*/
127 void on_this_resume_cb(const std::function<void(VirtualMachine const&)>& cb)
129 on_this_resume.connect(cb);
131 /*! \static Add a callback fired when any VM is destroyed*/
132 static void on_destruction_cb(const std::function<void(VirtualMachine const&)>& cb) { on_vm_destruction.connect(cb); }
133 /*! Add a callback fired when this specific VM is destroyed*/
134 void on_this_destruction_cb(const std::function<void(VirtualMachine const&)>& cb)
136 on_this_vm_destruction.connect(cb);
138 /*! \static Add a callback fired when any VM starts a migration*/
139 static void on_migration_start_cb(const std::function<void(VirtualMachine const&)>& cb)
141 on_migration_start.connect(cb);
143 /*! Add a callback fired when this specific VM starts a migration*/
144 void on_this_migration_start_cb(const std::function<void(VirtualMachine const&)>& cb)
146 on_this_migration_start.connect(cb);
148 /*! \static Add a callback fired when any VM ends a migration*/
149 static void on_migration_end_cb(const std::function<void(VirtualMachine const&)>& cb)
151 on_migration_end.connect(cb);
153 /*! Add a callback fired when this specific VM ends a migration*/
154 void on_this_migration_end_cb(const std::function<void(VirtualMachine const&)>& cb)
156 on_this_migration_end.connect(cb);
159 } // namespace simgrid::s4u