JAllocator.cc

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#include <iostream>
#include <iomanip>
#include <vector>
#include <algorithm>
#include <random>
 
#include "JLang/JAllocator.hh"
#include "JLang/JRAM.hh"
#include "JLang/JObjectAllocator.hh"
 
#include "Jeep/JParser.hh"
#include "Jeep/JMessage.hh"
#include "Jeep/JTimer.hh"
 
 
namespace {
 
  struct __A__ 
  {
    __A__() :
      i(0),
      d(0.0)
    {}
 
    int    i;
    double d;
  };
 
 
  struct __B__ : 
    public __A__,
    public JLANG::JObjectAllocator<__A__, JLANG::JAllocator>
  {};
 
 
  struct __C__ : 
    public __A__,
    public JLANG::JObjectAllocator<__A__, JLANG::JRAM>
  {};
 
 
  /**
   * Test method for memory allocation and de-allocation.
   *
   * \param  argc    number of command line arguments
   * \param  argv    list   of command line arguments
   * \param  title   title of this template process
   * \return         status
   */
  template<class JType_t>
  int do_main(int argc, char **argv, const char* title)
  {
    using namespace std;
 
    int         numberOfAllocs;
    int         numberOfEvents;
    bool        random;
    bool        reverse;
    int         debug;
  
    try {
 
      JParser<> zap("Auxiliary program to test speed of memory allocation.");
 
      zap['n'] = make_field(numberOfAllocs) = 1000;
      zap['N'] = make_field(numberOfEvents) = 1000;
      zap['r'] = make_field(random);
      zap['R'] = make_field(reverse);
      zap['d'] = make_field(debug)          = 3;
 
      zap(argc, argv);
    }
    catch(const exception &error) {
      FATAL(error.what() << endl);
    }
 
 
    using namespace JPP;
    
    cout << endl << title << endl;
 
    JTimer timer1("Allocate");
    JTimer timer2("Free");
 
    timer1.reset();
    timer2.reset();
 
 
    vector<JType_t*> buffer;
 
    for (int event_count = 0; event_count != numberOfEvents; ++event_count) {
 
      buffer.resize(numberOfAllocs);
 
      typename vector<JType_t*>::iterator out = buffer.begin();
 
      timer1.start();
 
      for (int i = numberOfAllocs; i != 0; --i, ++out) {
        *out = new JType_t();
      }
 
      timer1.stop();
 
      if (random) {
 
        random_device rd;
        mt19937 g(rd());
 
        std::shuffle(buffer.begin(), buffer.end(), g);
      }
 
      if (reverse) {
        std::reverse(buffer.begin(), buffer.end());
      }    
 
      timer2.start();
 
      for (typename vector<JType_t*>::iterator i = buffer.begin(); i != buffer.end(); ++i) {
        delete *i;
      }
 
      timer2.stop();
    }
 
    const double factor = 1.0 / (numberOfEvents * numberOfAllocs);
 
    timer1.print(cout, factor, nano_t);
    timer2.print(cout, factor, nano_t);
 
    return 0;
  }
}
 
/**
 * \file
 *
 * Auxiliary program to test speed of JLANG::JObjectAllocator class.
 * \author mdejong
 */
int main(int argc, char **argv)
{
  if (do_main<__A__>(argc, argv, "C++")        != 0) return 1;
  if (do_main<__B__>(argc, argv, "JAllocator") != 0) return 1;
  if (do_main<__C__>(argc, argv, "JRAM")       != 0) return 1;
}