Below are real-time benchmarks from our own machines. You can view the instructions for making here or on the Install page.
Compare your performance with ours. We also encourage you to send us your benchmarks. That way, we can build a comprehensive list of what performance can be expected from what hardware.
If you used the live CDs, run:
If you did a custom installation, go to the base of the RTXI directory you cloned from GitHub and run:
This script will test kernel latencies at rate of 20 kHz while under stress. The test lasts 10 minutes. If at any point you need to stop the test, you can kill the process by entering
CTRL+c in the terminal running the stress test. Then, run
pkill stress. If you forget to use
pkill, the system will stop measuring latencies, but it will still be under stress. Depending on your system, you may experience lag in your desktop during the test. Keep in mind that the stress test is designed to assess real-time performance under worst-case conditions. If your system performs well under heavy load, you can be reassured that it will perform well during your experiments.
Once completed, the script will provide the data necessary for you to generate a latencies histogram for your system.
For systems with discrete graphics cards and somewhat recent processors, latencies should consistently remain on average below 2-3 μs. Worst case latencies may get as high as 10-15 μs, but keep in mind that these spikes occur often once or twice over the 10 minute duration of the stress test, which at 20 kHz constitutes 12 million cycles. Compare your performance to what is available on our stats and benchmarks page and let us know if your performance is problematic.
RT performance during experiments can be monitored and recorded through the RT Benchmarks module. Record the RT Benchmarks module in RTXI using the Data Recorder module. RT Benchmarks displays runtime statistics for your system, such as the computation time, real-time period, and jitter. For those unfamiliar with the terms, here are brief definitions:
To record the RT Benchmarks module:
Note: You can change the frequency for your measurements via the System Control Panel. Just open the module, change the value for "Frequency," and hit "Apply" to save your changes.
Note: If you set the frequency high or record for a long time, the size of the generated files can become unwieldy. Make liberal use of the downsampling functionality in the Data Recorder.