Getting Started, compare against reference eager model for verification in pybind

Author: mergennachin

docs/source/getting-started.md

@@ -86,7 +86,17 @@ runtime = Runtime.get()
 input_tensor: torch.Tensor = torch.randn(1, 3, 224, 224)
 program = runtime.load_program("model.pte")
 method = program.load_method("forward")
-outputs: List[torch.Tensor] = method.execute([input_tensor])
+output: List[torch.Tensor] = method.execute([input_tensor])
+print("Run succesfully via executorch")
+
+from torchvision.models.mobilenetv2 import MobileNet_V2_Weights
+import torchvision.models as models
+
+eager_reference_model = models.mobilenetv2.mobilenet_v2(weights=MobileNet_V2_Weights.DEFAULT).eval()
+eager_reference_output = eager_reference_model(input_tensor)
+
+print("Comparing against original PyTorch module")
+print(torch.allclose(output[0], eager_reference_output, rtol=1e-3, atol=1e-5))
 ```