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 static int __can_be_started(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);
41 /* We assume users do not want to care about ramsize. */
46 XBT_VERB("%s allows memory overcommit.", sg_host_get_name(pm));
50 /* Retrieve the memory occupied by the VMs on that host. Yep, we have to traverse all VMs of all hosts for that */
51 long total_ramsize_of_vms = 0;
52 for (simgrid::surf::VirtualMachineImpl* ws_vm : simgrid::surf::VirtualMachineImpl::allVms_)
53 if (pm == ws_vm->getPm())
54 total_ramsize_of_vms += ws_vm->getRamsize();
56 if (vm_ramsize > pm_ramsize - total_ramsize_of_vms) {
57 XBT_WARN("cannnot start %s@%s due to memory shortage: vm_ramsize %ld, free %ld, pm_ramsize %ld (bytes).",
58 sg_host_get_name(vm), sg_host_get_name(pm),
59 vm_ramsize, pm_ramsize - total_ramsize_of_vms, pm_ramsize);
66 void SIMIX_vm_start(sg_host_t vm)
68 if (__can_be_started(vm))
69 static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->setState(SURF_VM_STATE_RUNNING);
71 THROWF(vm_error, 0, "The VM %s cannot be started", vm->name().c_str());
75 * @brief Function to migrate a SIMIX VM host.
77 * @param host the vm host to migrate (a sg_host_t)
79 void SIMIX_vm_migrate(sg_host_t vm, sg_host_t dst_pm)
81 /* precopy migration makes the VM temporally paused */
82 xbt_assert(static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->getState() == SURF_VM_STATE_SUSPENDED);
84 /* jump to vm_ws_xigrate(). this will update the vm location. */
85 static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->migrate(dst_pm);
89 * @brief Function to suspend a SIMIX VM host. This function stops the execution of the
90 * VM. All the processes on this VM will pause. The state of the VM is
91 * preserved on memory. We can later resume it again.
93 * @param vm the vm host to suspend (a sg_host_t)
95 void SIMIX_vm_suspend(sg_host_t vm, smx_actor_t issuer)
97 if (static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->getState() != SURF_VM_STATE_RUNNING)
98 THROWF(vm_error, 0, "VM(%s) is not running", vm->name().c_str());
100 XBT_DEBUG("suspend VM(%s), where %d processes exist", vm->name().c_str(), xbt_swag_size(sg_host_simix(vm)->process_list));
102 /* jump to vm_ws_suspend. The state will be set. */
103 static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->suspend();
105 smx_actor_t smx_process, smx_process_safe;
106 xbt_swag_foreach_safe(smx_process, smx_process_safe, sg_host_simix(vm)->process_list) {
107 XBT_DEBUG("suspend %s", smx_process->name.c_str());
108 SIMIX_process_suspend(smx_process, issuer);
111 XBT_DEBUG("suspend all processes on the VM done done");
114 void simcall_HANDLER_vm_suspend(smx_simcall_t simcall, sg_host_t vm)
116 xbt_assert(simcall->issuer->host != vm, "cannot suspend the VM where I run");
118 SIMIX_vm_suspend(vm, simcall->issuer);
120 XBT_DEBUG("simcall_HANDLER_vm_suspend done");
125 * @brief Function to resume a SIMIX VM host. This function restart the execution of the
126 * VM. All the processes on this VM will run again.
128 * @param vm the vm host to resume (a sg_host_t)
130 void SIMIX_vm_resume(sg_host_t vm)
132 if (static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->getState() != SURF_VM_STATE_SUSPENDED)
133 THROWF(vm_error, 0, "VM(%s) was not suspended", vm->name().c_str());
135 XBT_DEBUG("resume VM(%s), where %d processes exist",
136 vm->name().c_str(), xbt_swag_size(sg_host_simix(vm)->process_list));
138 /* jump to vm_ws_resume() */
139 static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->resume();
141 smx_actor_t smx_process, smx_process_safe;
142 xbt_swag_foreach_safe(smx_process, smx_process_safe, sg_host_simix(vm)->process_list) {
143 XBT_DEBUG("resume %s", smx_process->name.c_str());
144 SIMIX_process_resume(smx_process);
149 * @brief Function to save a SIMIX VM host.
150 * This function is the same as vm_suspend, but the state of the VM is saved to the disk, and not preserved on memory.
151 * We can later restore it again.
153 * @param vm the vm host to save (a sg_host_t)
155 void SIMIX_vm_save(sg_host_t vm, smx_actor_t issuer)
157 const char *name = sg_host_get_name(vm);
159 if (static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->getState() != SURF_VM_STATE_RUNNING)
160 THROWF(vm_error, 0, "VM(%s) is not running", name);
162 XBT_DEBUG("save VM(%s), where %d processes exist", name, xbt_swag_size(sg_host_simix(vm)->process_list));
164 /* jump to vm_ws_save() */
165 static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->save();
167 smx_actor_t smx_process, smx_process_safe;
168 xbt_swag_foreach_safe(smx_process, smx_process_safe, sg_host_simix(vm)->process_list) {
169 XBT_DEBUG("suspend %s", smx_process->name.c_str());
170 SIMIX_process_suspend(smx_process, issuer);
174 void simcall_HANDLER_vm_save(smx_simcall_t simcall, sg_host_t vm)
176 SIMIX_vm_save(vm, simcall->issuer);
180 * @brief Function to shutdown a SIMIX VM host. This function powers off the
181 * VM. All the processes on this VM will be killed. But, the state of the VM is
182 * preserved on memory. We can later start it again.
184 * @param vm the VM to shutdown (a sg_host_t)
186 void SIMIX_vm_shutdown(sg_host_t vm, smx_actor_t issuer)
188 if (static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->getState() != SURF_VM_STATE_RUNNING)
189 THROWF(vm_error, 0, "VM(%s) is not running", vm->name().c_str());
191 XBT_DEBUG("shutdown VM %s, that contains %d processes",
192 vm->name().c_str(),xbt_swag_size(sg_host_simix(vm)->process_list));
194 smx_actor_t smx_process, smx_process_safe;
195 xbt_swag_foreach_safe(smx_process, smx_process_safe, sg_host_simix(vm)->process_list) {
196 XBT_DEBUG("kill %s", smx_process->name.c_str());
197 SIMIX_process_kill(smx_process, issuer);
200 /* FIXME: we may have to do something at the surf layer, e.g., vcpu action */
201 static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->setState(SURF_VM_STATE_CREATED);
204 void simcall_HANDLER_vm_shutdown(smx_simcall_t simcall, sg_host_t vm)
206 SIMIX_vm_shutdown(vm, simcall->issuer);