149 lines
4.1 KiB
C++
149 lines
4.1 KiB
C++
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2017 Lawrence Livermore National Laboratory
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation;
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Author: Gustavo Carneiro <gjc@inescporto.pt>
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* Author: Peter D. Barnes, Jr. <pdbarnes@llnl.gov>
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*/
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/**
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* \file
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* \ingroup core-examples
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* \ingroup logging
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* Example program that demonstrates ShowProgress.
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*/
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/**
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* Example program that demonstrates ShowProgress.
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*
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*/
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#include "ns3/core-module.h"
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#include <ctime>
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#include <iomanip>
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#include <string>
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using namespace ns3;
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NS_LOG_COMPONENT_DEFINE ("SampleShowProgress");
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namespace {
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/**
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* Execute a function periodically,
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* which takes more or less time to run.
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*
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* Inspired by PHOLD.
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*/
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class Hold : public SimpleRefCount<Hold>
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{
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public:
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/**
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* Create a Hold with mean inter-event time \pname{wait},
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* changing workload every \pname{interval}.
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* \param wait The mean inter-event time.
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* \param interval How often to change work load. This
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* should be an order of magnitude larger than \pname{wait}.
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*/
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Hold (Time wait, Time interval)
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{
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m_wait = wait;
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m_interval = interval;
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m_rng = CreateObject<ExponentialRandomVariable> ();
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m_rng->SetAttribute ("Mean", DoubleValue (m_wait.GetSeconds ()));
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}
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/**
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* Create a hold with a specified random number generator for the
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* \pname{wait} time. The RNG value will be interpreted as seconds.
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* \param rng The random variable generator to use for the inter-event time.
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*/
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Hold (Ptr<RandomVariableStream> rng)
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: m_rng (rng)
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{}
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/** The Hold event. */
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void Event (void)
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{
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double delta = m_rng->GetValue ();
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Time delay = Seconds (delta);
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NS_LOG_LOGIC ("event delay: " << delay);
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Simulator::Schedule (delay, &Hold::Event, this);
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// Switch work load every 10 * m_interval of simulation time
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int64x64_t ratio = (Simulator::Now () / m_interval) / 10;
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bool even = (ratio.GetHigh () % 2);
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Time work = m_wait * (even ? 3 : 1);
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m_condition.TimedWait ( work.GetNanoSeconds () );
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}
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private:
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/** The random number generator for the interval between events. */
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Ptr<RandomVariableStream> m_rng;
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/** Timer to represent workload. */
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SystemCondition m_condition;
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/** Mean inter-event time. */
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Time m_wait;
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/** Time between switching workloads. */
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Time m_interval;
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}; // class HOLD
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} // unnamed namespace
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int
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main (int argc, char ** argv)
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{
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Time stop = Seconds (100);
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Time interval = Seconds (10);
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Time wait = MilliSeconds (10);
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bool verbose = false;
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CommandLine cmd (__FILE__);
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cmd.AddValue ("stop", "Simulation duration in virtual time.", stop);
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cmd.AddValue ("interval", "Approximate reporting interval, in wall clock time.", interval);
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cmd.AddValue ("wait", "Wallclock time to burn on each event.", wait);
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cmd.AddValue ("verbose", "Turn on verbose progress message.", verbose);
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cmd.Parse (argc, argv);
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std::cout << "\n"
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<< cmd.GetName () << ":\n"
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<< "\n"
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<< "verbose progress message: " << (verbose ? "on\n" : "off\n")
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<< "target reporting interval: " << interval.As (Time::S) << "\n"
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<< "average event sleep time: " << wait.As (Time::MS) << "\n"
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<< "total simulation run time: " << stop.As (Time::S)
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<< std::endl;
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Ptr<Hold> h = Create<Hold> (wait, interval);
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h->Event ();
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Simulator::Stop (stop);
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ShowProgress spinner (interval);
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spinner.SetVerbose (verbose);
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Simulator::Run ();
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Simulator::Destroy ();
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}
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