In message: <42C359F8.4060000@xxxxxxxxxx> David Daney <ddaney@xxxxxxxxxx> writes: : M. Warner Losh wrote: : > In message: <42C34C4D.9020902@xxxxxxxxxx> : > David Daney <ddaney@xxxxxxxxxx> writes: : > : Does anyone have any idea what would cause 1000mS delay? : > : > That's remarkably close to 1s. This often indicates that the transmit : > of your next packet is causing the receive buffer to empty. This is : > usually due to blocked interrupts, or a failure to enable interrupts. : > : : But I observe ever increasing counts for the device in /proc/interrupts. : So the interrupts are working somewhat. Are you sure that you've routed the interrupts correctly? Maybe those interrupts are 'really' for a different device.... Warner