sample-show-progress.cc

Go to the documentation of this file.

/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2017 Lawrence Livermore National Laboratory
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation;
 *
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Author: Gustavo Carneiro <gjc@inescporto.pt>
 * Author: Peter D. Barnes, Jr. <pdbarnes@llnl.gov>
 */
 
#include "ns3/core-module.h"
 
#include <chrono>
#include <iomanip>
#include <thread>
#include <string>
 
 
using namespace ns3;
 
NS_LOG_COMPONENT_DEFINE ("SampleShowProgress");
 
namespace {
 
class Hold : public SimpleRefCount<Hold>
{
public:
 
  Hold (Time wait, Time interval)
  {
    m_wait = wait;
    m_interval = interval;
 
    m_rng = CreateObject<ExponentialRandomVariable> ();
    m_rng->SetAttribute ("Mean", DoubleValue (m_wait.GetSeconds ()));
  }
 
  Hold (Ptr<RandomVariableStream> rng)
    : m_rng (rng)
  {}
 
  void Event (void)
  {
    double delta = m_rng->GetValue ();
    Time delay = Seconds (delta);
    NS_LOG_LOGIC ("event delay: " << delay);
 
    Simulator::Schedule (delay, &Hold::Event, this);
 
    // Switch work load every 10 * m_interval of simulation time
    int64x64_t ratio = (Simulator::Now () / m_interval) / 10;
    bool even = (ratio.GetHigh () % 2);
    Time work = m_wait * (even ? 3 : 1);
    std::this_thread::sleep_for (std::chrono::nanoseconds (work.GetNanoSeconds ()));
  }
 
private:
  Ptr<RandomVariableStream> m_rng;
  Time m_wait;
  Time m_interval;
 
};  // class HOLD
 
}  // unnamed namespace
 
 
int
main (int argc, char ** argv)
{
  Time stop = Seconds (100);
  Time interval = Seconds (10);
  Time wait = MilliSeconds (10);
  bool verbose = false;
 
  CommandLine cmd (__FILE__);
  cmd.AddValue ("stop", "Simulation duration in virtual time.", stop);
  cmd.AddValue ("interval", "Approximate reporting interval, in wall clock time.", interval);
  cmd.AddValue ("wait", "Wallclock time to burn on each event.", wait);
  cmd.AddValue ("verbose", "Turn on verbose progress message.", verbose);
  cmd.Parse (argc, argv);
 
  std::cout << "\n"
            << cmd.GetName () << ":\n"
            << "\n"
            << "verbose progress message:  " << (verbose ? "on\n" : "off\n")
            << "target reporting interval: " << interval.As (Time::S) << "\n"
            << "average event sleep time:  " << wait.As (Time::MS)    << "\n"
            << "total simulation run time: " << stop.As (Time::S)
            << std::endl;
 
  Ptr<Hold> h = Create<Hold> (wait, interval);
  h->Event ();
 
  Simulator::Stop (stop);
  ShowProgress spinner (interval);
  spinner.SetVerbose (verbose);
 
  Simulator::Run ();
  Simulator::Destroy ();
 
  return 0;
}