Sync Benchmark C++ Sample¶

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 demos this sample doesn’t have other configurable command line arguments. Feel free to modify sample’s source code to try out different options.

The following C++ API is used in the application:

Feature	API	Description
OpenVINO Runtime Version	`ov::get_openvino_version`	Get Openvino API version.
Basic Infer Flow	`ov::Core`, `ov::Core::compile_model`, `ov::CompiledModel::create_infer_request`, `ov::InferRequest::get_tensor`	Common API to do inference: compile a model, create an infer request, configure input tensors.
Synchronous Infer	`ov::InferRequest::infer`,	Do synchronous inference.
Model Operations	`ov::CompiledModel::inputs`	Get inputs of a model.
Tensor Operations	`ov::Tensor::get_shape`, `ov::Tensor::data`	Get a tensor shape and its data.

Options	Values
Validated Models	alexnet, googlenet-v1, yolo-v3-tf, face-detection-0200
Model Format	OpenVINO™ toolkit Intermediate Representation (.xml + .bin), ONNX (*.onnx)
Supported devices	All
Other language realization	Python

How It Works¶

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.

You can see the explicit description of each sample step at Integration Steps section of “Integrate OpenVINO™ Runtime with Your Application” guide.

Building¶

To build the sample, please use instructions available at Build the Sample Applications section in OpenVINO™ Toolkit Samples guide.

Running¶

sync_benchmark <path_to_model>

To run the sample, you need to specify a model:

You can use public or Intel’s pre-trained models from the Open Model Zoo. The models can be downloaded using the Model Downloader.

Note

Before running the sample with a trained model, make sure the model is converted to the intermediate representation (IR) format (*.xml + *.bin) using the model conversion API.

The sample accepts models in ONNX format (.onnx) that do not require preprocessing.

Example¶

Install the openvino-dev Python package to use Open Model Zoo Tools:
```
python -m pip install openvino-dev[caffe]
```
Download a pre-trained model using:
```
omz_downloader --name googlenet-v1
```
If a model is not in the IR or ONNX format, it must be converted. You can do this using the model converter:
```
omz_converter --name googlenet-v1
```
Perform benchmarking using the googlenet-v1 model on a CPU:
```
sync_benchmark googlenet-v1.xml
```

Sample Output¶

The application outputs performance results.

[ INFO ] OpenVINO:
[ INFO ] Build ................................. <version>
[ INFO ] Count:      992 iterations
[ INFO ] Duration:   15009.8 ms
[ INFO ] Latency:
[ INFO ]        Median:     14.00 ms
[ INFO ]        Average:    15.13 ms
[ INFO ]        Min:        9.33 ms
[ INFO ]        Max:        53.60 ms
[ INFO ] Throughput: 66.09 FPS