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/* -*- c++ -*- */
/*
* Copyright 2002 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <sys/time.h>
#ifdef HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif
#include <unistd.h>
#include <gr_fir_util.h>
#include <gr_fir_fff.h>
#include <random.h>
#define TOTAL_TEST_SIZE (40 * 1000 * 1000L)
#define NTAPS 256
#define BLOCK_SIZE (50 * 1000) /* fits in cache */
#if ((TOTAL_TEST_SIZE % BLOCK_SIZE) != 0)
#error "TOTAL_TEST_SIZE % BLOCK_SIZE must equal 0"
#endif
typedef gr_fir_fff* (*fir_maker_t)(const std::vector<float> &taps);
typedef gr_fir_fff filter_t;
static double
timeval_to_double (const struct timeval *tv)
{
return (double) tv->tv_sec + (double) tv->tv_usec * 1e-6;
}
static void
benchmark (fir_maker_t filter_maker, const char *implementation_name)
{
int i;
float coeffs[NTAPS];
float input[BLOCK_SIZE + NTAPS];
long n;
float result;
#ifdef HAVE_SYS_RESOURCE_H
struct rusage rusage_start;
struct rusage rusage_stop;
#else
double clock_start;
double clock_end;
#endif
// setup coefficients and input data
for (i = 0; i < NTAPS; i++)
coeffs[i] = random() - RANDOM_MAX/2;
for (i = 0; i < BLOCK_SIZE + NTAPS; i++)
input[i] = random() - RANDOM_MAX/2;
std::vector<float> taps (&coeffs[0], &coeffs[NTAPS]);
filter_t *f = filter_maker (taps);
// get starting CPU usage
#ifdef HAVE_SYS_RESOURCE_H
if (getrusage (RUSAGE_SELF, &rusage_start) < 0){
perror ("getrusage");
exit (1);
}
#else
clock_start = (double) clock() * (1000000. / CLOCKS_PER_SEC);
#endif
// do the actual work
for (n = 0; n < TOTAL_TEST_SIZE; n += BLOCK_SIZE){
int j;
for (j = 0; j < BLOCK_SIZE; j++){
result = f->filter (&input[j]);
}
}
// get ending CPU usage
#ifdef HAVE_SYS_RESOURCE_H
if (getrusage (RUSAGE_SELF, &rusage_stop) < 0){
perror ("getrusage");
exit (1);
}
// compute results
double user =
timeval_to_double (&rusage_stop.ru_utime)
- timeval_to_double (&rusage_start.ru_utime);
double sys =
timeval_to_double (&rusage_stop.ru_stime)
- timeval_to_double (&rusage_start.ru_stime);
double total = user + sys;
#else
clock_end = (double) clock () * (1000000. / CLOCKS_PER_SEC);
double total = clock_end -clock_start;
#endif
double macs = NTAPS * (double) TOTAL_TEST_SIZE;
printf ("%10s: taps: %4d input: %4g cpu: %6.3f taps/sec: %10.4g \n",
implementation_name, NTAPS, (double) TOTAL_TEST_SIZE, total, macs / total);
delete f;
}
static void
do_all ()
{
std::vector<gr_fir_fff_info> info;
gr_fir_util::get_gr_fir_fff_info (&info); // get all known FFF implementations
for (std::vector<gr_fir_fff_info>::iterator p = info.begin ();
p != info.end ();
++p){
benchmark (p->create, p->name);
}
}
int
main (int argc, char **argv)
{
do_all ();
return 0;
}
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