136 lines
7.3 KiB
Markdown
136 lines
7.3 KiB
Markdown
# Sync Benchmark C++ Sample {#openvino_inference_engine_samples_sync_benchmark_README}
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@sphinxdirective
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.. meta::
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:description: Learn how to estimate performance of a model using Synchronous Inference Request (C++) API.
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This sample demonstrates how to estimate performance of a model using Synchronous Inference Request API. It makes sense to use synchronous inference only in latency oriented scenarios. Models with static input shapes are supported. Unlike :doc:`demos <omz_demos>` this sample doesn't have other configurable command line arguments. Feel free to modify sample's source code to try out different options.
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The following C++ API is used in the application:
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+--------------------------+----------------------------------------------+----------------------------------------------+
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| Feature | API | Description |
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+==========================+==============================================+==============================================+
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| OpenVINO Runtime Version | ``ov::get_openvino_version`` | Get Openvino API version. |
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+--------------------------+----------------------------------------------+----------------------------------------------+
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| Basic Infer Flow | ``ov::Core``, ``ov::Core::compile_model``, | Common API to do inference: compile a model, |
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| | ``ov::CompiledModel::create_infer_request``, | create an infer request, |
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| | ``ov::InferRequest::get_tensor`` | configure input tensors. |
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+--------------------------+----------------------------------------------+----------------------------------------------+
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| Synchronous Infer | ``ov::InferRequest::infer``, | Do synchronous inference. |
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+--------------------------+----------------------------------------------+----------------------------------------------+
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| Model Operations | ``ov::CompiledModel::inputs`` | Get inputs of a model. |
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+--------------------------+----------------------------------------------+----------------------------------------------+
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| Tensor Operations | ``ov::Tensor::get_shape``, | Get a tensor shape and its data. |
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| | ``ov::Tensor::data`` | |
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+--------------------------+----------------------------------------------+----------------------------------------------+
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+--------------------------------+------------------------------------------------------------------------------------------------+
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| Options | Values |
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+================================+================================================================================================+
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| Validated Models | :doc:`alexnet <omz_models_model_alexnet>`, |
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| | :doc:`googlenet-v1 <omz_models_model_googlenet_v1>`, |
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| | :doc:`yolo-v3-tf <omz_models_model_yolo_v3_tf>`, |
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| | :doc:`face-detection-0200 <omz_models_model_face_detection_0200>` |
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+--------------------------------+------------------------------------------------------------------------------------------------+
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| Model Format | OpenVINO™ toolkit Intermediate Representation |
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| | (\*.xml + \*.bin), ONNX (\*.onnx) |
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+--------------------------------+------------------------------------------------------------------------------------------------+
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| Supported devices | :doc:`All <openvino_docs_OV_UG_supported_plugins_Supported_Devices>` |
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+--------------------------------+------------------------------------------------------------------------------------------------+
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| Other language realization | :doc:`Python <openvino_inference_engine_ie_bridges_python_sample_sync_benchmark_README>` |
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+--------------------------------+------------------------------------------------------------------------------------------------+
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How It Works
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####################
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The sample compiles a model for a given device, randomly generates input data, performs synchronous inference multiple times for a given number of seconds. Then processes and reports performance results.
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You can see the explicit description of
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each sample step at :doc:`Integration Steps <openvino_docs_OV_UG_Integrate_OV_with_your_application>` section of "Integrate OpenVINO™ Runtime with Your Application" guide.
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Building
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####################
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To build the sample, please use instructions available at :doc:`Build the Sample Applications <openvino_docs_OV_UG_Samples_Overview>` section in OpenVINO™ Toolkit Samples guide.
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Running
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####################
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.. code-block:: sh
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sync_benchmark <path_to_model>
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To run the sample, you need to specify a model:
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- You can use :doc:`public <omz_models_group_public>` or :doc:`Intel's <omz_models_group_intel>` pre-trained models from the Open Model Zoo. The models can be downloaded using the :doc:`Model Downloader <omz_tools_downloader>`.
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.. note::
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Before running the sample with a trained model, make sure the model is converted to the intermediate representation (IR) format (\*.xml + \*.bin) using the :doc:`model conversion API <openvino_docs_MO_DG_Deep_Learning_Model_Optimizer_DevGuide>`.
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The sample accepts models in ONNX format (.onnx) that do not require preprocessing.
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Example
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++++++++++++++++++++
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1. Install the ``openvino-dev`` Python package to use Open Model Zoo Tools:
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.. code-block:: sh
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python -m pip install openvino-dev[caffe]
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2. Download a pre-trained model using:
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.. code-block:: sh
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omz_downloader --name googlenet-v1
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3. If a model is not in the IR or ONNX format, it must be converted. You can do this using the model converter:
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.. code-block:: sh
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omz_converter --name googlenet-v1
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4. Perform benchmarking using the ``googlenet-v1`` model on a ``CPU``:
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.. code-block:: sh
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sync_benchmark googlenet-v1.xml
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Sample Output
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####################
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The application outputs performance results.
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.. code-block:: sh
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[ INFO ] OpenVINO:
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[ INFO ] Build ................................. <version>
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[ INFO ] Count: 992 iterations
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[ INFO ] Duration: 15009.8 ms
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[ INFO ] Latency:
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[ INFO ] Median: 14.00 ms
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[ INFO ] Average: 15.13 ms
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[ INFO ] Min: 9.33 ms
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[ INFO ] Max: 53.60 ms
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[ INFO ] Throughput: 66.09 FPS
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See Also
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####################
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* :doc:`Integrate the OpenVINO™ Runtime with Your Application <openvino_docs_OV_UG_Integrate_OV_with_your_application>`
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* :doc:`Using OpenVINO Samples <openvino_docs_OV_UG_Samples_Overview>`
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* :doc:`Model Downloader <omz_tools_downloader>`
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* :doc:`Convert a Model <openvino_docs_MO_DG_Deep_Learning_Model_Optimizer_DevGuide>`
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@endsphinxdirective
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