BestDENS Class Reference

#include <bestdens.h>

Inheritance diagram for BestDENS:

Collaboration diagram for BestDENS:

Public Member Functions
	BestDENS ()
virtual	~BestDENS ()
virtual TskComAgent *	scheduleTask (CloudTask *task, std::vector< ResourceProvider * > providers)
Public Member Functions inherited from BestScoreScheduler
	BestScoreScheduler ()
virtual	~BestScoreScheduler ()
Public Member Functions inherited from ScoreScheduler
	ScoreScheduler ()
virtual	~ScoreScheduler ()
Public Member Functions inherited from DcScheduler
	DcScheduler ()
virtual	~DcScheduler ()

Private Member Functions
virtual double	calculateScore (ResourceProvider *rp)
double	densLoadFactor (double load, double epsilon)
double	linkLoadFactor (double load)

Private Attributes
double	epsilon

Detailed Description

MultiDENS scheduler. To meaningfully use it, enableDVFS on the resource providers used by this scheduler. TODO: add networking part of DENS.

Definition at line 21 of file bestdens.h.

Constructor & Destructor Documentation

BestDENS::BestDENS

(

)

Definition at line 11 of file bestdens.cc.

                   : epsilon(0.1){

}

BestDENS::~BestDENS ( )

virtual

Definition at line 15 of file bestdens.cc.

                    {

}

Member Function Documentation

double BestDENS::calculateScore ( ResourceProvider *  rp )

privatevirtual

Implements BestScoreScheduler.

Definition at line 23 of file bestdens.cc.

                                                   {
                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  )

private

Definition at line 48 of file bestdens.cc.

                                                         {
                return 1/(1+exp(-10*(load-0.5))) - 1/(1+exp((-10/epsilon)*(load-(1-(epsilon/2)))));
}

double BestDENS::linkLoadFactor ( double  load )

private

Definition at line 52 of file bestdens.cc.

                                          {
                return exp(-(load*load));
}

TskComAgent * BestDENS::scheduleTask ( CloudTask *  task, std::vector< ResourceProvider * >  providers  )

virtual

Reimplemented from BestScoreScheduler.

Definition at line 19 of file bestdens.cc.

                                                                                           {
                return BestScoreScheduler::scheduleTask(task,providers);
}

Member Data Documentation

double BestDENS::epsilon

private

Definition at line 27 of file bestdens.h.

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The documentation for this class was generated from the following files:

• bestdens.h
• bestdens.cc