root/natfw-nslp/trunk/eval/benchmark.cpp @ 2274

/*
 * benchmark.cpp - a class for performing benchmarks
 *
 * $Id$
 * $HeadURL$
 *
 */
#include <iostream>
#include <ctime>

#include "logfile.h"
#include "benchmark.h"


/*
 * Protlib logging, needed for linking.
 */
protlib::log::logfile commonlog;
protlib::log::logfile &protlib::log::DefaultLog(commonlog);


using namespace natfw;


benchmark::benchmark() {
        using namespace protlib::log;

        /*
         * Turn off logging.
         */
        commonlog.set_filter(ERROR_LOG, LOG_EMERG + 1);
        commonlog.set_filter(WARNING_LOG, LOG_EMERG + 1);
        commonlog.set_filter(EVENT_LOG, LOG_EMERG + 1);
        commonlog.set_filter(INFO_LOG, LOG_EMERG + 1);
        commonlog.set_filter(DEBUG_LOG, LOG_EMERG + 1);
}


/**
 * Run the benchmark.
 *
 * This method runs the perform_task() method @a num_times.
 *
 * @param name the name of the benchmark
 * @param num_times the number of times to run perform_task()
 */
void benchmark::run(const std::string &name, unsigned long num_times) {
        using std::cout;

        cout << "Running benchmark '" << name << "' ("
                << num_times << " iterations) ...\n";

        // used to decide when to display a progress indicator
        unsigned tasks_per_dot = num_times / 70;

        if ( tasks_per_dot == 0 )
                tasks_per_dot = 1;

        time_t start = time(NULL);

        cout << "Starting time: " << ctime(&start);

        for ( unsigned i = 1; i <= num_times; i++ ) {

                perform_task();

                if ( (i % tasks_per_dot) == 0 )
                        cout << '.' << std::flush;
        }

        time_t stop = time(NULL);

        cout << "\n";
        cout << "Ending time: " << ctime(&stop);
        cout << "Time used in seconds: " << stop - start << "\n";
        cout << "\n";
}

// EOF