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ONNX Runtime: cross-platform, high performance ML inferencing and training accelerator
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<del> **This PR is based on a few prerequisites PRs. They are listed as below:** - #17465 - #17469 - #17470 - #17472 - #17473 - #17484 Please review the current change by only looking at commit e2e6623e673ec6de55a5c1f8edcbd3a46b535a89 and later. </del> ### Description This PR introduces WebGPU IO binding. This new feature allows onnxruntime-web users to use tensors created from GPU as model input/output so that a model inferencing can be done without unnecessary data copy between CPU and GPU for model input/output. ### Examples An E2E demo/example is being worked on. Following is some simple demo with code snippet. Let's first check today how we do: ```js // STEP.1 - create an inference session: const mySession = await ort.InferenceSession.create('./my_model.onnx', { executionProviders: ['webgpu'] }); // STEP.2 - create model input: (supposing myImageCpuData is a Float32Array) const feeds = { 'input_image:0': new ort.Tensor('float32', myImageCpuData, [1, 224, 224, 3]) }; // STEP.3 - run model const myResults = await mySession.run(feeds); // STEP.4 - get output data const myData = myResults['output_image:0'].data; // Float32Array ``` #### for inputs (GPU tensor): Now, with IO binding, you can create a tensor from a GPU buffer, and feed it to the model: ```js // new STEP.2.A - create model input from a GPU buffer: (supposing myInputGpuBuffer is a `GPUBuffer` object with input data) const feeds = { 'input_image:0': ort.Tensor.fromGpuBuffer(myInputGpuBuffer, { dataType: 'float32', dims: [1, 224, 224, 3] }) }; ``` ### for outputs (pre-allocated GPU tensor) you can also do that for output, **if you know the output shape**: ```js // new STEP.2.B - create model output from a GPU buffer: (supposing myOutputGpuBuffer is a pre-allocated `GPUBuffer` object) const fetches = { 'output_image:0': ort.Tensor.fromGpuBuffer(myOutputGpuBuffer, { dataType: 'float32', dims: [1, 512, 512, 3] }) }; // new STEP.3 - run model with pre-allocated output (fetches) const myResults = await mySession.run(feeds, fetches); ``` ### for outputs (specify location) if you do not know the output shape, you can specify the output location when creating the session: ```js // new STEP.1 - create an inference session with an option "preferredOutputLocation": const mySession = await ort.InferenceSession.create('./my_model.onnx', { executionProviders: ['webgpu'], preferredOutputLocation: "gpu-buffer" }); ``` if the model has multiple outputs, you can specify them seperately: ```js // new STEP.1 - create an inference session with an option "preferredOutputLocation": const mySession = await ort.InferenceSession.create('./my_model.onnx', { executionProviders: ['webgpu'], preferredOutputLocation: { "output_image:0": "gpu-buffer" } }); ``` now you don't need to prepare the `fetches` object and onnxruntime-web will prepare output data on the location that specified. #### read data when you get the output tensor, you can: ```js // get the gpu buffer object: const gpuBuffer = myOutputTensor.gpuBuffer; // GPUBuffer // get the CPU data asynchronizely const cpuData = await myOutputTensor.getData(); // get the CPU data asynchronizely and release the underlying GPU resources const cpuData = await myOutputTensor.getData(true); // dispose the tensor (release the underlying GPU resources). This tensor object will be invalid after dispose() is called. myOutputTensor.dispose(); ``` #### resource management JavaScript has GC so you don't need to worry about managing JavaScript objects. But there are 2 types of resources that are not managed by GC: - GPU buffer that used in tensors - Underlying ORT native resources To simplify, most of the unmanaged resources and handled inside ORT web. But there are a few resources that need users to manage: - All external GPU resources, including GPU buffers inside all tensors created by `Tensor.fromGpuBuffer()`, will not be managed by ORT. User should manage those GPU buffers themselves. - When a session is created with `preferredOutputLocation` == "gpu-buffer" specified in session options, and the corresponding output is not pre-allocated, user need to call the output tensor's `dispose()` or `getData(true)` to manually release the underlying GPU buffers. - ORT internal errors (including providing a pre-allocated output tensor with wrong type/dims) will invalidate the whole wasm memory and is not recoverable. An exception is thrown in this situation. |
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ONNX Runtime is a cross-platform inference and training machine-learning accelerator.
ONNX Runtime inference can enable faster customer experiences and lower costs, supporting models from deep learning frameworks such as PyTorch and TensorFlow/Keras as well as classical machine learning libraries such as scikit-learn, LightGBM, XGBoost, etc. ONNX Runtime is compatible with different hardware, drivers, and operating systems, and provides optimal performance by leveraging hardware accelerators where applicable alongside graph optimizations and transforms. Learn more →
ONNX Runtime training can accelerate the model training time on multi-node NVIDIA GPUs for transformer models with a one-line addition for existing PyTorch training scripts. Learn more →
Get Started & Resources
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General Information: onnxruntime.ai
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Usage documention and tutorials: onnxruntime.ai/docs
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YouTube video tutorials: youtube.com/@ONNXRuntime
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Companion sample repositories:
- ONNX Runtime Inferencing: microsoft/onnxruntime-inference-examples
- ONNX Runtime Training: microsoft/onnxruntime-training-examples
Builtin Pipeline Status
| System | Inference | Training |
|---|---|---|
| Windows | ||
| Linux | ||
| Mac | ||
| Android | ||
| iOS | ||
| Web | ||
| Other |
Third-party Pipeline Status
| System | Inference | Training |
|---|---|---|
| Linux |  |
Data/Telemetry
Windows distributions of this project may collect usage data and send it to Microsoft to help improve our products and services. See the privacy statement for more details.
Contributions and Feedback
We welcome contributions! Please see the contribution guidelines.
For feature requests or bug reports, please file a GitHub Issue.
For general discussion or questions, please use GitHub Discussions.
Code of Conduct
This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact opencode@microsoft.com with any additional questions or comments.
License
This project is licensed under the MIT License.