source: xssim/trunk/src/example/localplugin/FCFSCPUFreqScalingClusterLocalPlugin.java @ 143

package example.localplugin;

import gridsim.Gridlet;
import gridsim.gssim.ResourceHistoryItem;
import gridsim.gssim.SubmittedTask;

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

import schedframe.resources.units.ResourceUnit;
import schedframe.scheduling.TaskInterface;
import schedframe.scheduling.events.SchedulingEvent;
import schedframe.scheduling.events.TaskFinishedEvent;
import schedframe.scheduling.events.TaskRequestedTimeExpiredEvent;
import schedframe.scheduling.plugin.grid.ModuleList;
import schedframe.scheduling.utils.ResourceParameterName;
import test.rewolucja.GSSIMJobInterface;
import test.rewolucja.energy.profile.PStateType;
import test.rewolucja.resources.ProcessingElements;
import test.rewolucja.resources.ResourceStatus;
import test.rewolucja.resources.manager.implementation.ClusterResourceManager;
import test.rewolucja.resources.manager.interfaces.ResourceManagerInterface;
import test.rewolucja.resources.physical.base.ComputingResource;
import test.rewolucja.resources.physical.implementation.CPU;
import test.rewolucja.scheduling.JobRegistryInterface;
import test.rewolucja.scheduling.plan.SchedulingPlanInterfaceNew;
import test.rewolucja.scheduling.plan.SchedulingPlanNew;
import test.rewolucja.scheduling.queue.GSSIMQueue;
import test.rewolucja.scheduling.queue.QueueList;

public class FCFSCPUFreqScalingClusterLocalPlugin extends BaseLocalPlugin {

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

        public SchedulingPlanInterfaceNew schedule(SchedulingEvent event, QueueList queues, JobRegistryInterface jobRegistry,
                        ResourceManagerInterface resManager, ModuleList modules) {

                ClusterResourceManager resourceManager = (ClusterResourceManager) resManager;
                SchedulingPlanNew plan = new SchedulingPlanNew();
                // our tasks are placed only in first queue (see
                // BaseLocalPlugin.placeTasksInQueues() method)
                GSSIMQueue q = queues.get(0);
                // chose the events types to serve.
                // Different actions for different events are possible.
                switch (event.getType()) {
                
                case START_TASK_EXECUTION:

                        // check all tasks in queue
                        for (int i = 0; i < q.size(); i++) {
                                GSSIMJobInterface<?> job = q.get(i);
                                TaskInterface<?> task = (TaskInterface<?>) job;
                                // if status of the tasks in READY
                                if (task.getStatus() == Gridlet.READY) {

                                        Map<ResourceParameterName, ResourceUnit> choosenResources = chooseResourcesForExecution(resourceManager, task);
                                        if (choosenResources  != null) {
                                                addToSchedulingPlan(plan, task, choosenResources);
                                                ProcessingElements pes = (ProcessingElements)choosenResources.get(ResourceParameterName.PROCESSINGELEMENTS);
                                                List<CPU> processors =  new ArrayList<CPU>();
                                                for(ComputingResource res : pes){
                                                        processors.add((CPU) res);
                                                }
                                                adjustFrequency(ResourceStatus.BUSY,processors);
                                        } 
                                }
                        }
                        break;
                        
                case TASK_FINISHED:
                        TaskFinishedEvent finEvent = (TaskFinishedEvent) event;
                        SubmittedTask subTask = jobRegistry.getSubmittedTask(finEvent.getJobId(), finEvent.getTaskId());
                        List<ResourceHistoryItem> usedResourcesList = subTask.getUsedResources();
                        ProcessingElements pes = (ProcessingElements)usedResourcesList.get(usedResourcesList.size() - 1).getResourceUnits().get(ResourceParameterName.PROCESSINGELEMENTS);
                        List<CPU> processors =  new ArrayList<CPU>();
                        for(ComputingResource res : pes){
                                processors.add((CPU) res);
                                allocatedCPUs.add((CPU) res);
                        }
                        adjustFrequency(ResourceStatus.FREE, processors);
                        break;
                        
                case TASK_REQUESTED_TIME_EXPIRED:
                        TaskRequestedTimeExpiredEvent timExpEvent = (TaskRequestedTimeExpiredEvent) event;
                         subTask = jobRegistry.getSubmittedTask(timExpEvent.getJobId(), timExpEvent.getTaskId());
                        usedResourcesList = subTask.getUsedResources();
                        pes = (ProcessingElements)usedResourcesList.get(usedResourcesList.size() - 1).getResourceUnits().get(ResourceParameterName.PROCESSINGELEMENTS);
                        processors =  new ArrayList<CPU>();
                        for(ComputingResource res : pes){
                                allocatedCPUs.remove((CPU) res);
                        }
                        // check all tasks in queue
                        for (int i = 0; i < q.size(); i++) {
                                GSSIMJobInterface<?> job = q.get(i);
                                TaskInterface<?> task = (TaskInterface<?>) job;
                                // if status of the tasks in READY
                                if (task.getStatus() == Gridlet.READY) {

                                        Map<ResourceParameterName, ResourceUnit> choosenResources = chooseResourcesForExecution(resourceManager, task);
                                        if (choosenResources  != null) {
                                                addToSchedulingPlan(plan, task, choosenResources);
                                                pes = (ProcessingElements)choosenResources.get(ResourceParameterName.PROCESSINGELEMENTS);
                                                processors =  new ArrayList<CPU>();
                                                for(ComputingResource res : pes){
                                                        processors.add((CPU) res);
                                                }
                                                adjustFrequency(ResourceStatus.BUSY, processors);
                                        } 
                                }
                        }
                        break;
                }
                return plan;
        }
        
        private HashMap<ResourceParameterName, ResourceUnit> chooseResourcesForExecution(
                        ClusterResourceManager resourceManager, TaskInterface<?> task) {

                HashMap<ResourceParameterName, ResourceUnit> map = new HashMap<ResourceParameterName, ResourceUnit>();

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

                if (cpuRequest != 0) {
                        List<ComputingResource> choosenResources = null;
                        List<CPU> 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(ResourceParameterName.PROCESSINGELEMENTS, result);
                }
                return map;
        }

        private void adjustFrequency(ResourceStatus status, List<CPU> processors){
                switch(status){
                case BUSY:
                        for(CPU cpu: processors){
                                if(cpu.getPowerInterface().getSupportedPStates().containsKey(PStateType.P0))
                                        cpu.getPowerInterface().setPState(PStateType.P0);
                        }
                        break;
                case FREE:
                        for(CPU cpu: processors){
                                if(cpu.getPowerInterface().getSupportedPStates().containsKey(PStateType.P3))
                                        cpu.getPowerInterface().setPState(PStateType.P3);
                        }
                        break;
                }
        }
        
        public String getName() {
                return getClass().getName();
        }

        public void init(Properties properties) {
                // no extra initialization is expected.
        }

}