Initial support of single GPU rendering when multiple cards with same name exists

benchmark/foundation/context.py

@@ -7,6 +7,7 @@ class Context:
     __slots__ = ('blender',
                  'device_type',
                  'device_name',
+                 'device_single',
                  'scenes',
                  'scenes_dir',
                  'configure_script',
@@ -19,6 +20,8 @@ class Context:
         self.device_type = 'CPU'
         # Name of the device to render on.
         self.device_name = 'NAME'
+        # Use single device when there are multiple one matching the name
+        self.device_single = False
         # By default we use empty list, it is up to the user to fill it in.
         self.scenes = []
         # It is up to the user to provide proper path to scenes.