[Plugin EP] Add examples for how to run a plugin EP with C++ and Python #536
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Added prerequisites for running inference with a Plugin EP.
Refactor plugin EP registration and session creation for TensorRTEp.
Added instructions for running inference with explicit and automatic EP selection.
Added a note about the location of the mul_1.onnx file.
Updated the README to include code examples for running inference with a Plugin EP and clarified the steps for explicit and automatic EP selection.
chilo-ms
changed the title
Updated README to reflect C++ API usage instead of Python API and added additional prerequisites.
| - A dynamic/shared EP library that exports the functions `CreateEpFactories()` and `ReleaseEpFactory()`. | ||
| - ONNX Runtime built as a shared library (e.g., `onnxruntime.dll` on Windows or `libonnxruntime.so` on Linux), since the EP library relies on the public ORT C API (which is ABI-stable) to interact with ONNX Runtime. | ||
| - The `onnxruntime_providers_shared.dll` (Windows) or `libonnxruntime_providers_shared.so` (Linux) is also required. When a plugin EP is registered, ONNX Runtime internally calls `LoadPluginOrProviderBridge`, which depends on this shared library to determine whether the EP DLL is a plugin or a provider-bridge. | ||
| - If you are using a pre-built ONNX Runtime package, all required libraries (e.g., `onnxruntime.dll`, `onnxruntime_providers_shared.dll`, etc.) are already included. |
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The onnxruntime_providers_shared.dll is not required for new EPs that are only using the new binary-stable APIs. If this example is only meant for new EPs, perhaps we don't need to mention it?
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Hmm, i think this example is for how to run ORT inference with a plugin ep, so it's worth mentioning onnxruntime_providers_shared.dll is also required.
If users only have onnxruntime.dll but no onnxruntime_providers_shared.dll is present, it will get following error:
unknown file: error: C++ exception with description "C:\Users\lochi\repos\onnxruntime\onnxruntime\core\session\provider_bridge_ort.cc:1789 onnxruntime::ProviderSharedLibrary::Ensure [ONNXRuntimeError] : 1 : FAIL : Error loading "C:\Users\lochi\repos\plugin_trt_ep_test\plugin_execution_providers\test\tensorrt\build\Debug\onnxruntime_providers_shared.dll" which is missing. (Error 126: "The specified module could not be found.")
" thrown in the test body.
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Add two examples to show users how to run a plugin EP with C++ and Python respectively.