Subject: events per interrupt?
To: None <>
From: David Young <>
List: tech-net
Date: 09/09/2002 15:31:16
Does anyone know the average interrupt overhead for NetBSD/i386?
NetBSD/macppc? Does NetBSD keep any statistic on interrupt overhead?

I ask because I am considering the costs and benefits of handling more
than one event per interrupt in wi(4). According to one source, it is
necessary to wait 20us after acknowledging an event from the Intersil
Prism2.x before reading another. If 20us is comparable to the interrupt
overhead, that affects the desirability of handling more than one
event set per interrupt.


David Young             OJC Technologies      Engineering from the Right Brain
                        Urbana, IL * (217) 278-3933