Thanks, I'll check it out. On Sat, Aug 22, 2020 at 5:43 PM Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: > > On Sat, Aug 22, 2020 at 02:03:02PM -0700, yunhua li wrote: > > Thanks, Alan, your answers are really helpful. > > one more question: > > > It depends on what other devices are attached to the USB bus. They may > > > or may not require some reserved bandwidth. > > Is there any tool/method I can dump reserved or allocated bandwidth > > info of each USB device? > > You can run "lsusb -v" and you can examine the contents of > /sys/kernel/debug/usb/devices. There's more information available > under /sys/kernel/debug/usb/xhci/* but I don't know what the format is > or if it includes bandwidth reservations. > > Alan Stern
