On Mon, Jun 18, 2007 at 04:14:54PM -0700, Jason Thorpe wrote:
> 
> That said, my examination of the code revealed a busy-wait in the  
> glxsb driver waiting for the AES operation to complete, which includes  
> a bus_space_read_4() in the tight (without delay) loop.
> 
> Seems like that ought to use a callout instead.

Oh, I've been down this road (painfully) with other accellerators.  Unless
you're going to run the system at very high HZ you can't really use a
callout unless you want awful single-stream performance.

With this accellerator interrupt-driven mode might be the way to go.

-- 
Thor Lancelot Simon	                               tls@rek.tjls.com
  "All of my opinions are consistent, but I cannot present them all
   at once."	-Jean-Jacques Rousseau, On The Social Contract