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/* -*- c++ -*- */
/*
* Copyright 2002,2004,2005 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 3, 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_vco.h>
#include <gr_fxpt_vco.h>
#include <string.h>
#define ITERATIONS 5000000
#define BLOCK_SIZE (10 * 1000) // fits in cache
#define FREQ 5003.123
#define K 4.9999999
#define AMPLITUDE 2.444444444
static double
timeval_to_double (const struct timeval *tv)
{
return (double) tv->tv_sec + (double) tv->tv_usec * 1e-6;
}
static void
benchmark (void test (float *x, const float *y), const char *implementation_name)
{
#ifdef HAVE_SYS_RESOURCE_H
struct rusage rusage_start;
struct rusage rusage_stop;
#else
double clock_start;
double clock_end;
#endif
float output[BLOCK_SIZE];
float input[BLOCK_SIZE];
// touch memory
memset(output, 0, BLOCK_SIZE*sizeof(float));
for (int i = 0; i<BLOCK_SIZE; i++)
input[i] = sin(i);
// 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
test (output, input);
// 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
printf ("%18s: cpu: %6.3f steps/sec: %10.3e\n",
implementation_name, total, ITERATIONS / total);
}
// ----------------------------------------------------------------
void basic_vco (float *output, const float *input)
{
double phase = 0;
for (int j = 0; j < ITERATIONS/BLOCK_SIZE; j++){
for (int i = 0; i < BLOCK_SIZE; i++){
output[i] = cos(phase) * AMPLITUDE;
phase += input[i] * K;
while (phase > 2 * M_PI)
phase -= 2 * M_PI;
while (phase < -2 * M_PI)
phase += 2 * M_PI;
}
}
}
void native_vco (float *output, const float *input)
{
gr_vco<float,float> vco;
for (int j = 0; j < ITERATIONS/BLOCK_SIZE; j++){
vco.cos(output, input, BLOCK_SIZE, K, AMPLITUDE);
}
}
void fxpt_vco (float *output, const float *input)
{
gr_fxpt_vco vco;
for (int j = 0; j < ITERATIONS/BLOCK_SIZE; j++){
vco.cos(output, input, BLOCK_SIZE, K, AMPLITUDE);
}
}
// ----------------------------------------------------------------
void nop_fct (float *x, const float *y)
{
}
void nop_loop (float *x, const float *y)
{
for (int i = 0; i < ITERATIONS; i++){
nop_fct (x, y);
}
}
int
main (int argc, char **argv)
{
benchmark (nop_loop, "nop loop");
benchmark (basic_vco, "basic vco");
benchmark (native_vco, "native vco");
benchmark (fxpt_vco, "fxpt vco");
}
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