XBT_LOG_NEW_DEFAULT_SUBCATEGORY(simix_vm, simix, "Logging specific to SIMIX Virtual Machines");
-/* works for VMs and PMs */
static long host_get_ramsize(sg_host_t vm, int *overcommit)
{
s_vm_params_t params;
return params.ramsize;
}
-/* **** start a VM **** */
-void SIMIX_vm_start(sg_host_t vm)
-{
- sg_host_t pm = static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->getPm();
-
- simgrid::vm::VmHostExt::ensureVmExtInstalled();
- if (pm->extension<simgrid::vm::VmHostExt>() == nullptr)
- pm->extension_set(new simgrid::vm::VmHostExt());
-
- long pm_ramsize = pm->extension<simgrid::vm::VmHostExt>()->ramsize;
- int pm_overcommit = pm->extension<simgrid::vm::VmHostExt>()->overcommit;
- long vm_ramsize = host_get_ramsize(vm, nullptr);
-
- if (pm_ramsize && !pm_overcommit) { /* Only verify that we don't overcommit on need */
- /* Retrieve the memory occupied by the VMs on that host. Yep, we have to traverse all VMs of all hosts for that */
- long total_ramsize_of_vms = 0;
- for (simgrid::s4u::VirtualMachine* ws_vm : simgrid::surf::VirtualMachineImpl::allVms_)
- if (pm == ws_vm->pimpl_vm_->getPm())
- total_ramsize_of_vms += ws_vm->pimpl_vm_->getRamsize();
-
- if (vm_ramsize > pm_ramsize - total_ramsize_of_vms) {
- XBT_WARN("cannnot start %s@%s due to memory shortage: vm_ramsize %ld, free %ld, pm_ramsize %ld (bytes).",
- sg_host_get_name(vm), sg_host_get_name(pm), vm_ramsize, pm_ramsize - total_ramsize_of_vms, pm_ramsize);
- THROWF(vm_error, 0, "The VM %s cannot be started", vm->name().c_str());
- }
- }
-
- static_cast<simgrid::s4u::VirtualMachine*>(vm)->pimpl_vm_->setState(SURF_VM_STATE_RUNNING);
-}
-
/**
* @brief Function to suspend a SIMIX VM host. This function stops the execution of the
* VM. All the processes on this VM will pause. The state of the VM is
