parallel_progress.h

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/*
 * Copyright (c) 2014-2015:  G-CSC, Goethe University Frankfurt
 * Author: Martin Rupp
 * 
 * This file is part of UG4.
 * 
 * UG4 is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License version 3 (as published by the
 * Free Software Foundation) with the following additional attribution
 * requirements (according to LGPL/GPL v3 §7):
 * 
 * (1) The following notice must be displayed in the Appropriate Legal Notices
 * of covered and combined works: "Based on UG4 (www.ug4.org/license)".
 * 
 * (2) The following notice must be displayed at a prominent place in the
 * terminal output of covered works: "Based on UG4 (www.ug4.org/license)".
 * 
 * (3) The following bibliography is recommended for citation and must be
 * preserved in all covered files:
 * "Reiter, S., Vogel, A., Heppner, I., Rupp, M., and Wittum, G. A massively
 *   parallel geometric multigrid solver on hierarchically distributed grids.
 *   Computing and visualization in science 16, 4 (2013), 151-164"
 * "Vogel, A., Reiter, S., Rupp, M., Nägel, A., and Wittum, G. UG4 -- a novel
 *   flexible software system for simulating pde based models on high performance
 *   computers. Computing and visualization in science 16, 4 (2013), 165-179"
 * 
 * This program 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 Lesser General Public License for more details.
 */
 
#ifndef PARALLEL_PROGRESS_H_
#define PARALLEL_PROGRESS_H_
 
#ifdef UG_PARALLEL
 
#include <iostream>
#include "common/util/string_util.h"
#include "common/log.h"
#include <ctime>
#include <string>
#include <sstream>
 
#include "common/stopwatch.h"
#include "common/util/ostream_util.h"
 
namespace ug
{
 
class ParallelProgress
{
//  int m_minSecondsUntilProgress;
  double startS;
public:
  ParallelProgress();
 
  ~ParallelProgress()
  {
    stop();
  }
  void set_length(int l)
  {
    m_length = l;
  }
 
  void calc_next_value()
  {
    dNextValueToUpdate = (posNow+1)*m_total/m_length;
    iNextValueToUpdate = (int) dNextValueToUpdate;
  }
  void start(double total, std::string msg, size_t numProc);
 
  inline void set(size_t now)
  {
    if(now < iNextValueToUpdate) return;
    setD(now);
  }
  inline void set(int now)
  {
    if(now < 0 || (size_t)now < iNextValueToUpdate) return;
    setD(now);
  }
 
  inline void set(double now)
  {
    if(now < dNextValueToUpdate) return;
    setD(now);
  }
  void setD(double now);
 
  void stop();
private:
  double dNextValueToUpdate;
  size_t iNextValueToUpdate;
  int posNow;
  double m_total;
  double m_now;
  int m_length;
  std::string m_msg;
};
 
}
 
#define PARALLEL_PROGRESS_START(progVarName, dSize, msg, numProcs) \
  ug::ParallelProgress progVarName; { std::stringstream ss; ss << msg; progVarName.start(dSize, ss.str(), numProcs); }
 
#define PARALLEL_PROGRESS_UPDATE(progVarName, d) progVarName.set(d);
#define PARALLEL_PROGRESS_FINISH(progVarName) progVarName.stop();
 
 
#endif
 
#endif /* PARALLEL_PROGRESS_H_ */