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USB performance/traffic monitor?

How can I monitor a USB bus (similar to how gnome-system-monitor works) to show bus utilization? Basically I want to identify when the bus is being 'maxed' out. I guess what I am looking for is some interface for usbmon, as that appears like it would do what I need.

This came about from testing the USRP and GNU Radio. I am running into a situation where it appears that the USB bus could be a limiting factor, so I ask the more general question of USB performance monitoring.
monitoring performance usb
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1 Answer

Kajalsi45d
Use usbtop, it gives a nice overview of what devices are using how much bandwidth:
Bus ID 1 (USB bus number 1) To device   From device

  Device ID 1 :             0.00 kb/s   0.00 kb/s

  Device ID 2 :             0.00 kb/s   0.00 kb/s

Bus ID 2 (USB bus number 2) To device   From device

  Device ID 1 :             0.00 kb/s   0.00 kb/s

  Device ID 4 :             141.73 kb/s 13777.68 kb/s

  Device ID 5 :             9.98 kb/s   11.24 kb/s

  Device ID 6 :             0.00 kb/s   0.00 kb/s

  Device ID 7 :             0.00 kb/s   0.00 kb/s

  Device ID 8 :             141.71 kb/s 15257.26 kb/s

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