source: DCWoRMS/trunk/src/example/localplugin/FCFSCPUFreqScalingClusterLocalPlugin.java @ 513

package example.localplugin;

import gridsim.dcworms.DCWormsTags;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import schedframe.events.scheduling.SchedulingEvent;
import schedframe.resources.ResourceStatus;
import schedframe.resources.computing.ComputingResource;
import schedframe.resources.computing.Processor;
import schedframe.resources.units.ProcessingElements;
import schedframe.resources.units.ResourceUnit;
import schedframe.resources.units.ResourceUnitName;
import schedframe.resources.units.StandardResourceUnitName;
import schedframe.scheduling.manager.resources.ClusterResourceManager;
import schedframe.scheduling.manager.resources.ResourceManager;
import schedframe.scheduling.manager.tasks.JobRegistry;
import schedframe.scheduling.plan.SchedulingPlanInterface;
import schedframe.scheduling.plan.impl.SchedulingPlan;
import schedframe.scheduling.plugin.grid.ModuleList;
import schedframe.scheduling.queue.TaskQueue;
import schedframe.scheduling.queue.TaskQueueList;
import schedframe.scheduling.tasks.TaskInterface;
import schedframe.scheduling.tasks.WorkloadUnit;

public class FCFSCPUFreqScalingClusterLocalPlugin extends BaseLocalSchedulingPlugin {

        List<Processor> allocatedCPUs;
        public FCFSCPUFreqScalingClusterLocalPlugin () {
                allocatedCPUs = new ArrayList<Processor>();
        }

        public SchedulingPlanInterface<?> schedule(SchedulingEvent event, TaskQueueList queues, JobRegistry jobRegistry,
                        ResourceManager resManager, ModuleList modules) {

                ClusterResourceManager resourceManager = (ClusterResourceManager) resManager;
                SchedulingPlan plan = new SchedulingPlan();
                // our tasks are placed only in first queue (see
                // BaseLocalPlugin.placeJobsInQueues() method)
                TaskQueue q = queues.get(0);
                // chose the events types to serve.
                // Different actions for different events are possible.
                switch (event.getType()) {
                
                case START_TASK_EXECUTION:
                case TASK_FINISHED:
                        // check all tasks in queue
                        for (int i = 0; i < q.size(); i++) {
                                TaskInterface<?> task = q.get(i);
                                // if status of the tasks in READY
                                if (task.getStatus() == DCWormsTags.READY) {

                                        Map<ResourceUnitName, ResourceUnit> choosenResources = chooseResourcesForExecution(resourceManager, task);
                                        if (choosenResources  != null) {
                                                addToSchedulingPlan(plan, task, choosenResources);
                                        } 
                                }
                        }
                        adjustFrequency(resourceManager.getProcessors());
                }
                return plan;
        }
        
        private Map<ResourceUnitName, ResourceUnit> chooseResourcesForExecution(
                        ClusterResourceManager resourceManager, TaskInterface<?> task) {

                Map<ResourceUnitName, ResourceUnit> map = new HashMap<ResourceUnitName, ResourceUnit>();

                int cpuRequest;
                try {
                        cpuRequest = Double.valueOf(task.getCpuCntRequest()).intValue();
                } catch (NoSuchFieldException e) {
                        cpuRequest = 1;
                }

                if (cpuRequest != 0) {
                        List<ComputingResource> choosenResources = null;
                        List<Processor> processors = resourceManager.getProcessors();
                        processors.removeAll(allocatedCPUs);
                        if (processors.size() < cpuRequest) {
                                // log.warn("Task requires more cpus than is availiable in this resource.");
                                return null;
                        }

                        choosenResources = new ArrayList<ComputingResource>();

                        for (int i = 0; i < processors.size() && cpuRequest > 0; i++) {
                                if (processors.get(i).getStatus() == ResourceStatus.FREE) {
                                        choosenResources.add(processors.get(i));
                                        cpuRequest--;
                                }
                        }
                        if (cpuRequest > 0) {
                                // log.info("Task " + task.getJobId() + "_" + task.getId() +
                                // " requires more cpus than is availiable in this moment.");
                                return null;
                        }

                        ProcessingElements result = new ProcessingElements();
                        result.addAll(choosenResources);
                        map.put(StandardResourceUnitName.PE, result);
                }
                return map;
        }
        
        private void adjustFrequency(List<Processor> processors){

                for(Processor cpu: processors){
                        if(cpu.getStatus() == ResourceStatus.FREE) {
                                if(cpu.getPowerInterface().getSupportedPStates().containsKey("P3"))
                                        cpu.getPowerInterface().setPState("P3");
                        }
                        else{
                                if(cpu.getPowerInterface().getSupportedPStates().containsKey("P0"))
                                        cpu.getPowerInterface().setPState("P0");
                        }

                }

        }


}