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Version: 3.16.1 (latest)

GPU Usage

Since face recognition requires a lot of processing power, GPU acceleration for Face SDK modules is now available for running deep learning algorithms.

You can use GPU acceleration on:

  • Windows x86 64-bit
  • Linux x86 64-bit
  • Android
  • Jetson (JetPack 4.3/4.4)

In this section you'll find the information about GPU acceleration for available Face SDK modules and learn how to enable this function, as well as the information about timing characteristics for Face SDK modules with CPU and GPU usage, possible errors during GPU usage, and relevant solutions.

Desktop [beta]#

Currently, GPU acceleration is available for the following modules (single GPU mode only):

To run models on GPU, edit the configuration file of one of the supported recognizers: set use_cuda to 1.

Windows/Linux#

You can also use pre-built docker containers with CUDA support, such as nvidia/cuda:10.0-cudnn7-devel-ubuntu16.04 (note that some licenses can be unavailable in this case).

GPU acceleration is performed on one of the available GPUs (by default on GPU with index 0). GPU index can be changed as follows:

  • via the gpu_index parameter in the configuration file
  • via the CUDA_VISIBLE_DEVICES environment variable (see more info about CUDA Environment Variables)

Jetson#

  • System requirements:
    • JetPack 4.3 or 4.4*

* Tests were performed on the Jetson TX2 and Jetson NX modules.

The archive with the required libraries is jetson_jetpack_4.3_4.4.tar.xz. By default, it uses the build for jetpack 4.4. If a build for jetpack 4.3 is required, move all files from the lib/jetpack-4.3 directory to the lib directory.

Timing characteristics#

The table below shows the speed measurements for template creation using CPU and GPU:

MethodGPUCPU
11v100035 ms865 ms
9v30010 ms260 ms
10v10013 ms40 ms
10v3011 ms24 ms

See the timing characteristics of GPU-based face detection in the Face detection section.

Note: the NVIDIA GeForce GTX 1080 Ti and Intel Core i7 were used for the speed test.

Troubleshooting#

ErrorSolution
Assertion failed (Cannot open shared object file libtensorflow.so.2)Make sure the library file libtensorflow.so.2 is in the same directory as the libfacerec.so library you are using
Assertion failed (Cannot open shared object file tensorflow.dll)Make sure the library file tensorflow.dll is in the same directory as the facerec.dll library you are using
Slow initializationIncreasing the default JIT cache size: `export CUDA_CACHE_MAXSIZE=2147483647` (see JIT Caching)

Android [beta]#

Currently, GPU acceleration is available for the following modules:

The GPU usage can be enabled/disabled via the use_mobile_gpu flag in the configuration files of the Capturer, Recognizer, VideoWorker objects (in the configuration file of the VideoWorker object, GPU is enabled for detectors). By default, mobile GPU support is enabled (the value is 1). To disable the GPU usage, change the use_mobile_gpu flag to 0.

Timing characteristics#

The table below shows the speed measurements for Face SDK modules using CPU and GPU:

MethodCPUGPU
9v10003660ms610ms
9v3001960ms280ms
9v30170ms70ms

Note: The speed test was performed using Google Pixel 3.

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