The Coral Compatibility Test Suite (CTS) allows Coral partners to evaluate their hardware designs that contain Coral devices. The test acts as both a validation test and a stress test. Passing CTS indicates the device works as expected and performance/reliability matches official Coral platforms.
CTS is required for launching products branded "Made with Coral Intelligence". For more information on marketing and branding, see Approval Requirements.
The CTS is a collection of pre-compiled tests, all taken from libcoral. The tests have been compiled for multiple CPU architectures (ARM64, ARMv7a, and x86_64) as well as multiple OSes (Linux, Windows, MacOS).
The test includes:
- Inference stress testing
- Model loading stress testing
- Accuracy testing for classification, detection, and segmentation.
- Multi-TPU / Pipelining tests for devices with multiple TPUs.
- Benchmarking
It is not necessary to clone this entire repo, rather just download the appropriate archive for each architecture and OS you need to test. More info about which packages are needed for approval can be found in Approval Requirements.
The release packages can be found in the GitHub Releases.
If your system doesn't have a package, you can build the appropriate libcoral binaries. See Building for Other Platforms.
The first step is to download the appropriate archive for your test. Each archive contains the compiled binaries and the coral_cts.py script.
The test is designed to have as few system requirements as possible. The binaries are all statically built with the Coral libraries, so all that is needed is libusb (for USB) or the PCIe driver (see installation steps).
It is recommended that before running the test, you set your CPU governor to max performance to ensure consistent benchmark readings (and for better comparison to the Coral boards, included in the example_outputs folder). In Linux this can be done by running:
sudo apt install linux-cpupower
sudo cpupower frequency-set --governor performance
Once you have the archive, you're ready to extract it and run. Note that the test begins with downloading Coral Test Data (checked out at at the Frogfish Release) if there is not a folder named "test_data" in the extracted directory. Test data is the entire repository of Coral models, it takes up > 1 GB of storage. If you already have this repo on your system and want to skip the download, simply link the folder into the working directory with coral_cts.py.
The test runs in python, with no extra packages needed. To run (note: this assumes that USB/PCIe access is available to the current user, if not please use sudo or run as an administrator):
python3 coral_cts.py
There is only one argument, --output, which sets the output txt file. By
default, this is cts.txt in the current directory.
In order to be approved for "Made with Coral Intelligence" branding, you should first talk with your Coral contact or reach out on the Coral Sales Form for parternship, co-marketing, and legal questions.
Once it's time to run CTS, the requirements will vary based on the platform you have designed (and what it's intended to pair with):
PCIe Card (M.2, mPCIe, x1):
You will need to run three different CTS configurations: ARM64 Linux, x86_64 Linux, and x86_64 Windows.
PCIe Card (x16)
You will need to run two different CTS configurations: x86_64 Linux and x86_64 Windows.
USB Accessory
You will need to run three different CTS configurations: ARM64 Linux, x86_64 Linux, and x86_64 Windows. x86_64 macOS is also recommended, but is not required.
End product
If the design is a end product (i.e. not a an accessory intended to pair with other hosts), CTS is just run for the OS/Arch of the system (for example, an IP camera with Coral inside that runs on 64-bit ARM Linux would only need to run that test).
It is possible that your system doesn't work with the included binaries. You
will need to build the examples, benchmarks, and tests targets
from the libcoral repo.
Once built, your outputs will be in the out folder of libcoral. You'll want
to get the following binaries:
From out/<arch>/examples/coral:
lstpu
From out/<arch>/tests/coral:
tflite_utils_test
inference_stress_test
model_loading_stress_test
inference_repeatability_test
segmentation_models_test
multiple_tpus_inference_stress_test
From out/<arch>/tests/coral/classification:
classification_models_test
From out/<arch>/tests/coral/detection:
models_test (this must be renamed to detection_models_test)
From out/<arch>/benchmarks/coral/:
models_benchmark
Place these binaries in the same folder as coral_cts.py and run the script as described above.
If you have technical issues, please reach out to coral-support@google.com.
For marketing/partnership questions, please reach out to your Coral contact or the Coral Sales Form.