-
-/* Each VM has a dummy CPU action on the PM layer. This CPU action works as the constraint (capacity) of the VM in the
- * PM layer. If the VM does not have any active task, the dummy CPU action must be deactivated, so that the VM does not
- * get any CPU share in the PM layer. */
-void HostModel::ignore_empty_vm_in_pm_LMM()
-{
- /* iterate for all virtual machines */
- for (s4u::VirtualMachine* const& ws_vm : vm::VirtualMachineImpl::allVms_) {
- Cpu* cpu = ws_vm->pimpl_cpu;
- int active_tasks = cpu->get_constraint()->get_variable_amount();
-
- /* The impact of the VM over its PM is the min between its vCPU amount and the amount of tasks it contains */
- int impact = std::min(active_tasks, ws_vm->get_impl()->get_core_amount());
-
- XBT_DEBUG("set the weight of the dummy CPU action of VM%p on PM to %d (#tasks: %d)", ws_vm, impact, active_tasks);
- if (impact > 0)
- ws_vm->get_impl()->action_->set_priority(1. / impact);
- else
- ws_vm->get_impl()->action_->set_priority(0.);
- }
-}
-
-/* Helper function for executeParallelTask */
-static inline double has_cost(double* array, int pos)
-{
- if (array)
- return array[pos];
- else
- return -1.0;
-}
-
-kernel::resource::Action* HostModel::execute_parallel(int host_nb, s4u::Host** host_list, double* flops_amount,
- double* bytes_amount, double rate)
-{
- kernel::resource::Action* action = nullptr;
- if ((host_nb == 1) && (has_cost(bytes_amount, 0) <= 0) && (has_cost(flops_amount, 0) > 0)) {
- action = host_list[0]->pimpl_cpu->execution_start(flops_amount[0]);
- } else if ((host_nb == 1) && (has_cost(flops_amount, 0) <= 0)) {
- action = surf_network_model->communicate(host_list[0], host_list[0], bytes_amount[0], rate);
- } else if ((host_nb == 2) && (has_cost(flops_amount, 0) <= 0) && (has_cost(flops_amount, 1) <= 0)) {
- int nb = 0;
- double value = 0.0;
-
- for (int i = 0; i < host_nb * host_nb; i++) {
- if (has_cost(bytes_amount, i) > 0.0) {
- nb++;
- value = has_cost(bytes_amount, i);
- }
- }
- if (nb == 1) {
- action = surf_network_model->communicate(host_list[0], host_list[1], value, rate);
- } else if (nb == 0) {
- xbt_die("Cannot have a communication with no flop to exchange in this model. You should consider using the "
- "ptask model");
- } else {
- xbt_die("Cannot have a communication that is not a simple point-to-point in this model. You should consider "
- "using the ptask model");
- }
- } else {
- xbt_die(
- "This model only accepts one of the following. You should consider using the ptask model for the other cases.\n"
- " - execution with one host only and no communication\n"
- " - Self-comms with one host only\n"
- " - Communications with two hosts and no computation");
- }
- return action;
-}
-