| Publisher | Red Hat | ||
|---|---|---|---|
| Format | 93.8KB PDF | Date added | 18 May 2005 |
| Topics | Monitoring Systems | ||
| Downloads | 386 | ||
For years, Linux developers used printk() to debug the USB stack, but this approach has serious limitations. This paper discusses "usbmon," a recently developed facility to snoop USB traffic in a more efficient way than can be done with printk(). From far away, usbmon is a very straightforward piece of code. It consists of circular buffers which are filled with records by hooks into the USB stack and a thin glue to the user code which fetches these records. The devil, however, is in details. Also the user mode tools play a role.
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