`yolo.py --profile` updates (#7170)

models/yolo.py

@@ -310,11 +310,11 @@ if __name__ == '__main__':
 
     # Create model
     model = Model(opt.cfg).to(device)
-    model.train()
 
     # Profile
     if opt.profile:
-        img = torch.rand(16 if torch.cuda.is_available() else 1, 3, 640, 640).to(device)
+        model.eval().fuse()
+        img = torch.rand(8 if torch.cuda.is_available() else 1, 3, 640, 640).to(device)
         y = model(img, profile=True)
 
     # Test all models