1 /* Copyright (c) 2007-2015. 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. */
7 #include "simgrid/s4u/VirtualMachine.hpp"
8 #include "smx_private.h"
9 #include "src/plugins/vm/VirtualMachineImpl.hpp"
10 #include "src/plugins/vm/VmHostExt.hpp"
11 #include "src/surf/HostImpl.hpp"
13 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_vm, simix, "Logging specific to SIMIX Virtual Machines");
15 /* works for VMs and PMs */
16 static long host_get_ramsize(sg_host_t vm, int *overcommit)
19 static_cast<simgrid::s4u::VirtualMachine*>(vm)->parameters(¶ms);
22 *overcommit = params.overcommit;
24 return params.ramsize;
27 /* **** start a VM **** */
28 void SIMIX_vm_start(sg_host_t vm)
30 sg_host_t pm = static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->getPm();
32 simgrid::vm::VmHostExt::ensureVmExtInstalled();
33 if (pm->extension<simgrid::vm::VmHostExt>() == nullptr)
34 pm->extension_set(new simgrid::vm::VmHostExt());
36 long pm_ramsize = pm->extension<simgrid::vm::VmHostExt>()->ramsize;
37 int pm_overcommit = pm->extension<simgrid::vm::VmHostExt>()->overcommit;
38 long vm_ramsize = host_get_ramsize(vm, nullptr);
40 if (pm_ramsize && !pm_overcommit) { /* Only verify that we don't overcommit on need */
41 /* Retrieve the memory occupied by the VMs on that host. Yep, we have to traverse all VMs of all hosts for that */
42 long total_ramsize_of_vms = 0;
43 for (simgrid::s4u::VirtualMachine* ws_vm : simgrid::surf::VirtualMachineImpl::allVms_)
44 if (pm == ws_vm->pimpl_vm_->getPm())
45 total_ramsize_of_vms += ws_vm->pimpl_vm_->getRamsize();
47 if (vm_ramsize > pm_ramsize - total_ramsize_of_vms) {
48 XBT_WARN("cannnot start %s@%s due to memory shortage: vm_ramsize %ld, free %ld, pm_ramsize %ld (bytes).",
49 sg_host_get_name(vm), sg_host_get_name(pm), vm_ramsize, pm_ramsize - total_ramsize_of_vms, pm_ramsize);
50 THROWF(vm_error, 0, "The VM %s cannot be started", vm->name().c_str());
54 static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->setState(SURF_VM_STATE_RUNNING);
58 * @brief Function to suspend a SIMIX VM host. This function stops the execution of the
59 * VM. All the processes on this VM will pause. The state of the VM is
60 * preserved on memory. We can later resume it again.
62 * @param vm the vm host to suspend (a sg_host_t)
64 void SIMIX_vm_suspend(sg_host_t vm, smx_actor_t issuer)
66 if (static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->getState() != SURF_VM_STATE_RUNNING)
67 THROWF(vm_error, 0, "VM(%s) is not running", vm->name().c_str());
69 XBT_DEBUG("suspend VM(%s), where %d processes exist", vm->name().c_str(), xbt_swag_size(sg_host_simix(vm)->process_list));
71 /* jump to vm_ws_suspend. The state will be set. */
72 static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->suspend();
74 smx_actor_t smx_process, smx_process_safe;
75 xbt_swag_foreach_safe(smx_process, smx_process_safe, sg_host_simix(vm)->process_list) {
76 XBT_DEBUG("suspend %s", smx_process->name.c_str());
77 SIMIX_process_suspend(smx_process, issuer);
80 XBT_DEBUG("suspend all processes on the VM done done");
83 void simcall_HANDLER_vm_suspend(smx_simcall_t simcall, sg_host_t vm)
85 xbt_assert(simcall->issuer->host != vm, "cannot suspend the VM where I run");
87 SIMIX_vm_suspend(vm, simcall->issuer);
89 XBT_DEBUG("simcall_HANDLER_vm_suspend done");
94 * @brief Function to resume a SIMIX VM host. This function restart the execution of the
95 * VM. All the processes on this VM will run again.
97 * @param vm the vm host to resume (a sg_host_t)
99 void SIMIX_vm_resume(sg_host_t vm)
101 if (static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->getState() != SURF_VM_STATE_SUSPENDED)
102 THROWF(vm_error, 0, "VM(%s) was not suspended", vm->name().c_str());
104 XBT_DEBUG("resume VM(%s), where %d processes exist",
105 vm->name().c_str(), xbt_swag_size(sg_host_simix(vm)->process_list));
107 /* jump to vm_ws_resume() */
108 static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->resume();
110 smx_actor_t smx_process, smx_process_safe;
111 xbt_swag_foreach_safe(smx_process, smx_process_safe, sg_host_simix(vm)->process_list) {
112 XBT_DEBUG("resume %s", smx_process->name.c_str());
113 SIMIX_process_resume(smx_process);
118 * @brief Function to save a SIMIX VM host.
119 * This function is the same as vm_suspend, but the state of the VM is saved to the disk, and not preserved on memory.
120 * We can later restore it again.
122 * @param vm the vm host to save (a sg_host_t)
124 void SIMIX_vm_save(sg_host_t vm, smx_actor_t issuer)
126 const char *name = sg_host_get_name(vm);
128 if (static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->getState() != SURF_VM_STATE_RUNNING)
129 THROWF(vm_error, 0, "VM(%s) is not running", name);
131 XBT_DEBUG("save VM(%s), where %d processes exist", name, xbt_swag_size(sg_host_simix(vm)->process_list));
133 /* jump to vm_ws_save() */
134 static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->save();
136 smx_actor_t smx_process, smx_process_safe;
137 xbt_swag_foreach_safe(smx_process, smx_process_safe, sg_host_simix(vm)->process_list) {
138 XBT_DEBUG("suspend %s", smx_process->name.c_str());
139 SIMIX_process_suspend(smx_process, issuer);
143 void simcall_HANDLER_vm_save(smx_simcall_t simcall, sg_host_t vm)
145 SIMIX_vm_save(vm, simcall->issuer);
149 * @brief Function to shutdown a SIMIX VM host. This function powers off the
150 * VM. All the processes on this VM will be killed. But, the state of the VM is
151 * preserved on memory. We can later start it again.
153 * @param vm the VM to shutdown (a sg_host_t)
155 void SIMIX_vm_shutdown(sg_host_t vm, smx_actor_t issuer)
157 if (static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->getState() != SURF_VM_STATE_RUNNING)
158 THROWF(vm_error, 0, "VM(%s) is not running", vm->name().c_str());
160 XBT_DEBUG("shutdown VM %s, that contains %d processes",
161 vm->name().c_str(),xbt_swag_size(sg_host_simix(vm)->process_list));
163 smx_actor_t smx_process, smx_process_safe;
164 xbt_swag_foreach_safe(smx_process, smx_process_safe, sg_host_simix(vm)->process_list) {
165 XBT_DEBUG("kill %s", smx_process->name.c_str());
166 SIMIX_process_kill(smx_process, issuer);
169 /* FIXME: we may have to do something at the surf layer, e.g., vcpu action */
170 static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->setState(SURF_VM_STATE_CREATED);
173 void simcall_HANDLER_vm_shutdown(smx_simcall_t simcall, sg_host_t vm)
175 SIMIX_vm_shutdown(vm, simcall->issuer);