benchmark.c

Go to the documentation of this file.

/*
 * benchmark.c
 *
 * Part of librfn (a general utility library from redfelineninja.org.uk)
 *
 * Copyright (C) 2015 Daniel Thompson <daniel@redfelineninja.org.uk>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 */

#include <assert.h>
#include <stdio.h>
#include <string.h>

#include "librfn.h"
#include "libbench.h"

typedef struct {
        fibre_t fibre;
        benchmark_results_t results;
} conductor_fibre_t;

int conductor_fibre(fibre_t *fibre)
{
        conductor_fibre_t *c = containerof(fibre, conductor_fibre_t, fibre);
        static uint64_t end_time;
        static int i;

        PT_BEGIN_FIBRE(&c->fibre);

        benchmark_init(&c->results, fibre);

        /* busy wait for two seconds to try and open up the cpufreq governor */
        printf("Preparing ...");
        fflush(stdout);
        end_time = time64_now() + 2000000;
        while (time64_now() < end_time)
                PT_YIELD();
        printf(" done\n");

        printf("Benchmarking ");
        fflush(stdout);
        for (i=0; i<50; i++) {
                printf(".");
                fflush(stdout);
                PT_SPAWN(&c->results.pt, benchmark_run_once(&c->results));
        }
        printf(" done\nBenchmark completed in %4.2f seconds\n\n",
               (time64_now() - end_time) / 1000000.0);

        benchmark_show_results(&c->results);

        FILE *f = fopen("benchmark-results.csv", "w");
        benchmark_show_csv(&c->results, f);
        fclose(f);

        exit(0);
        PT_END();
}

conductor_fibre_t conductor = {
        .fibre = FIBRE_VAR_INIT(conductor_fibre)
};

int main(int argc, char *argv[])
{
        fibre_run(&conductor.fibre);
        fibre_scheduler_main_loop();

        return 0;
}