OpenVINO reduce System RAM usage

CHANGELOG.md

@@ -76,6 +76,7 @@
     - compatibility improvements  
   - **OpenVINO**, thanks @disty0  
     - **8 bit support for CPUs**  
+    - Reduce System RAM usage when compiling  
     - add *Directory for OpenVINO cache* option to *System Paths*  
     - remove Intel ARC specific 1024x1024 workaround  
   - **HDR controls**  

modules/intel/openvino/__init__.py

@@ -397,6 +397,8 @@ def openvino_fx(subgraph, example_inputs):
     if inputs_reversed:
         example_inputs.reverse()
     model = make_fx(subgraph)(*example_inputs)
+    # Deleting unused subgraphs doesn't do anything, so we cast it down to fp8
+    subgraph = subgraph.to(dtype=torch.float8_e4m3fn)
     for node in model.graph.nodes:
         if node.target == torch.ops.aten.mul_.Tensor:
             node.target = torch.ops.aten.mul.Tensor