9. Running Simulations

Simulating DEVS (and Cell-DEVS) models is Cadmium is pretty straightforward. We will illustrate it with the GPT model. We will run the simulation

Sequential Simulation

This is the simplest approach to simulate a DEVS model.

#include <cadmium/core/logger/csv.hpp>  // To import a CSV logger (to store simulation results in CSV file)
#include <cadmium/core/simulation/root_coordinator.hpp>  // To import the root coordinator
#include <limits>
#include "gpt.hpp"

int main() {
    // model-related configuration parameters
    int jobPeriod = 3;
    int processingTime = 1;
    double obsTime = 102.;

    // We create the model and forward it to the root coordinator
    // NOTE THAT WE NEED A POINTER TO THE MODEL!
    auto model = std::make_shared<GPT>("gpt", jobPeriod, processingTime, obsTime);
    auto rootCoordinator = cadmium::RootCoordinator(model);
    
    // We can add a logger to the root coordinator
    // In this example, we use a CSV logger that uses ; to separate columns.
    // Simulation results will be stored in the log_gpt.csv file.
    auto logger = std::make_shared<cadmium::CSVLogger>("log_gpt.csv", ";");
    rootCoordinator.setLogger(logger);
    
    // To start the simulation we 1) start, 2) simulate 3) stop.
    rootCoordinator.start();
    // in simulate method, we can select a maximum simulation time (in this case, infinity)
    rootCoordinator.simulate(std::numeric_limits<double>::infinity());
    rootCoordinator.stop();

    return 0;
}

Parallel Simulation

To do.

Logging Simulation Results

To do.