bestdens.cc

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/*
 * bestdens.cc
 *
 *              @date Oct 29, 2014
 *      @author Guzek:Mateusz
 */

#include "bestdens.h"
#include "dcrack.h"

BestDENS::BestDENS() : epsilon(0.1){

}

BestDENS::~BestDENS() {

}

TskComAgent* BestDENS::scheduleTask(CloudTask* task, std::vector<ResourceProvider* > providers){
                return BestScoreScheduler::scheduleTask(task,providers);
}

double BestDENS::calculateScore(ResourceProvider* rp){
                double result = 0;
                double load;
                for(int i = FirstResType; i <= LastResType ; i++){
                                load = rp->getResTypeUtil(static_cast<res_type>(i));
                                result+= densLoadFactor(load,epsilon);
                }
                result=result/(LastResType+1); // normalize according to the number of dimensions
//              std::cerr << "Res_prov " << rp->id_ << "\n";
//              DcHost* host = rp->getRootHost();
//              DcRack* rack = host->rack_;
//              std::cerr << "Rack " << rack->rack_id_ << "\n";
//              double ll = rack->link_load;
//              std::cerr << "ll " << ll << "\n";
                result *= pow(linkLoadFactor(rp->getRootHost()->rack_->link_load),2);
//              result += linkLoadFactor(ll);


//              double load = rp->getResTypeUtil(Computing);
//              result = densLoadFactor(load,0.1);
//              std::cerr << "Host " << rp->id_ /*<< "CPU load: " << load*/ << "\tDENS score: " << result << "\n";

                return result;
}

double BestDENS::densLoadFactor(double load,double epsilon){
                return 1/(1+exp(-10*(load-0.5))) - 1/(1+exp((-10/epsilon)*(load-(1-(epsilon/2)))));
}

double BestDENS::linkLoadFactor(double load){
                return exp(-(load*load));
}