XHCI bandwidth

To determine the bandwidth consumed by all USB devices connected to the xHCI controller, you can monitor the data transfer rates of each device. The xHCI (eXtensible Host Controller Interface) supports various USB transfer types, each with its own bandwidth characteristics. However, the total bandwidth consumption is not directly reported by the system; instead, you can analyze the data rates of individual devices.

You can use tools provided in the Windows Driver Kit (WDK) or third-party USB monitoring tools to observe the data being transferred through the xHCI controller. These tools can help you identify how much bandwidth each connected device is consuming during operation.

Additionally, the USB specifications outline the maximum bandwidth available for different types of transfers (e.g., bulk, isochronous, control, and interrupt), which can help you understand the potential limits of your setup.

For a more detailed analysis, you may need to implement custom monitoring solutions or utilize existing performance monitoring tools that can track USB bandwidth usage in real-time.

Seems like a similar question was asked earlier and that seems to have valuable links.

https://learn.microsoft.com/en-us/answers/questions/3193032/how-can-i-view-usb-device-bandwidth-allocation-in