1 files changed, 148 insertions, 0 deletions
diff --git a/gnuradio-core/src/tests/benchmark_dotprod.cc b/gnuradio-core/src/tests/benchmark_dotprod.cc
new file mode 100644
index 000000000..8986f7255
--- /dev/null
+++ b/gnuradio-core/src/tests/benchmark_dotprod.cc
@@ -0,0 +1,148 @@
+/* -*- 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., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, 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;
+}