benchmarkUtil.h

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/* This file is part of the Palabos library.
 *
 * Copyright (C) 2011 FlowKit Sarl
 * Avenue de Chailly 23
 * 1012 Lausanne, Switzerland
 * E-mail contact: contact@flowkit.com
 *
 * The most recent release of Palabos can be downloaded at 
 * <http://www.palabos.org/>
 *
 * The library Palabos is free software: you can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * The library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef BENCHMARK_UTIL_H
#define BENCHMARK_UTIL_H

#include "core/globalDefs.h"
#include <deque>

namespace plb {

namespace util {


template<typename T>
class ValueTracer {
public:

    ValueTracer(T u, T L, T epsilon);
    void resetScale(T u, T L);
    void resetValues();
    plint getDeltaT() const;
    void takeValue(T val, bool doPrint=false);
    bool hasConverged() const;
    bool hasConvergedMinMax() const;
    T computeAverage() const;
    T computeStdDev(T average) const;
    void setEpsilon(T epsilon_);
private:
    plint    deltaT;
    T      epsilon;
    plint    t;
    bool   converged;
    std::deque<T> values;
};


template<typename T>
class BisectStepper {
public:

    BisectStepper(T _iniVal, T _step=0.);
    T getVal(bool stable, bool doPrint=false);
    bool hasConverged(T epsilon) const;
private:
    T iniVal, currentVal, lowerVal, upperVal;
    T step;
    enum {first, up, down, bisect} state;
};

} // namespace util

} // namespace plb

#endif