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-rw-r--r--tools/perf-overhead.c181
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diff --git a/tools/perf-overhead.c b/tools/perf-overhead.c
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+/* Copyright (C) 2011, 2012 Matthias Vogelgesang <matthias.vogelgesang@kit.edu>
+ (Karlsruhe Institute of Technology)
+
+ This library 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 2.1 of the License, or (at your
+ option) any later version.
+
+ This library 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 Lesser General Public License for more
+ details.
+
+ You should have received a copy of the GNU Lesser General Public License along
+ with this library; if not, write to the Free Software Foundation, Inc., 51
+ Franklin St, Fifth Floor, Boston, MA 02110, USA */
+
+#include <glib-object.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "uca-plugin-manager.h"
+#include "uca-camera.h"
+
+#define handle_error(errno) {if ((errno) != UCA_NO_ERROR) printf("error at <%s:%i>\n", \
+ __FILE__, __LINE__);}
+
+typedef struct {
+ guint counter;
+ gsize size;
+ gpointer destination;
+} thread_data;
+
+static UcaCamera *camera = NULL;
+
+static void
+sigint_handler (int signal)
+{
+ printf ("Closing down libuca\n");
+ uca_camera_stop_recording (camera, NULL);
+ g_object_unref (camera);
+ exit (signal);
+}
+
+static void
+print_usage (void)
+{
+ GList *types;
+ UcaPluginManager *manager;
+
+ manager = uca_plugin_manager_new ();
+ g_print ("Usage: benchmark [ ");
+ types = uca_plugin_manager_get_available_cameras (manager);
+
+ if (types == NULL) {
+ g_print ("] -- no camera plugin found\n");
+ return;
+ }
+
+ for (GList *it = g_list_first (types); it != NULL; it = g_list_next (it)) {
+ gchar *name = (gchar *) it->data;
+ if (g_list_next (it) == NULL)
+ g_print ("%s ]\n", name);
+ else
+ g_print ("%s, ", name);
+ }
+}
+
+static void
+test_synchronous_operation (UcaCamera *camera)
+{
+ GError *error = NULL;
+ guint width, height, bits;
+ g_object_get (G_OBJECT (camera),
+ "sensor-width", &width,
+ "sensor-height", &height,
+ "sensor-bitdepth", &bits,
+ NULL);
+
+ const int pixel_size = bits == 8 ? 1 : 2;
+ const gsize size = width * height * pixel_size;
+ const guint n_trials = 10000;
+ gpointer buffer = g_malloc0(size);
+
+ uca_camera_start_recording (camera, &error);
+ GTimer *timer = g_timer_new ();
+
+ for (guint n = 0; n < n_trials; n++)
+ uca_camera_grab (camera, &buffer, &error);
+
+ gdouble total_time = g_timer_elapsed (timer, NULL);
+ g_timer_stop (timer);
+
+ g_print ("Synchronous data transfer\n");
+ g_print (" Bandwidth: %3.2f MB/s\n", size * n_trials / 1024. / 1024. / total_time);
+ g_print (" Throughput: %3.2f frames/s\n", n_trials / total_time);
+
+ uca_camera_stop_recording (camera, &error);
+ g_free (buffer);
+ g_timer_destroy (timer);
+}
+
+static void
+grab_func (gpointer data, gpointer user_data)
+{
+ static GStaticMutex mutex = G_STATIC_MUTEX_INIT;
+
+ thread_data *d = (thread_data *) user_data;
+ g_memmove (d->destination, data, d->size);
+ g_static_mutex_lock (&mutex);
+ d->counter++;
+ g_static_mutex_unlock (&mutex);
+}
+
+static void
+test_asynchronous_operation (UcaCamera *camera)
+{
+ GError *error = NULL;
+ guint width, height, bits;
+
+ g_object_get (G_OBJECT (camera),
+ "sensor-width", &width,
+ "sensor-height", &height,
+ "sensor-bitdepth", &bits,
+ NULL);
+
+ const guint pixel_size = bits == 8 ? 1 : 2;
+
+ thread_data d = {
+ .counter = 0,
+ .size = width * height * pixel_size,
+ .destination = g_malloc0(width * height * pixel_size)
+ };
+
+ g_object_set (G_OBJECT (camera),
+ "transfer-asynchronously", TRUE,
+ NULL);
+
+ uca_camera_set_grab_func (camera, &grab_func, &d);
+ uca_camera_start_recording (camera, &error);
+ g_usleep (G_USEC_PER_SEC);
+ uca_camera_stop_recording (camera, &error);
+
+ g_print ("Asynchronous data transfer\n");
+ g_print (" Bandwidth: %3.2f MB/s\n", d.size * d.counter / 1024. / 1024.);
+ g_print (" Throughput: %i frames/s\n", d.counter);
+
+ g_free (d.destination);
+}
+
+int
+main (int argc, char *argv[])
+{
+ UcaPluginManager *manager;
+ GError *error = NULL;
+ (void) signal (SIGINT, sigint_handler);
+
+ g_type_init ();
+ if (argc < 2) {
+ print_usage ();
+ return 1;
+ }
+
+ manager = uca_plugin_manager_new ();
+ camera = uca_plugin_manager_new_camera (manager, argv[1], &error);
+
+ if (camera == NULL) {
+ g_print ("Error during initialization: %s\n", error->message);
+ return 1;
+ }
+
+ test_synchronous_operation (camera);
+ g_print ("\n");
+ test_asynchronous_operation (camera);
+
+ g_object_unref (camera);
+ g_object_unref (manager);
+
+ return error != NULL ? 1 : 0;
+}