On Thu, 19 Jul 2001, Aaron J. Grier wrote:

: > And yes, if you cross the ring 0 / ring 3 boundary less often,
: > performance goes up. This will be true of XFree86 once it provides a
: > shortcut to ditch tcp/ip pipes to communicate with local graphics
: > hardware from local X clients, like SGI does.
:
: eh?  I thought XFree used unix domain sockets for the local case?

Depends on whether you specify a display as ":0" or "localhost:0", of course
-- but the original point was that some X systems can jump right into server
code from a client without going through X protocol encoding and a socket
copy.  MITSHM is an approximation of this, at least for the video data part
of the equation, but it could be better.

-- 
-- Todd Vierling <tv@wasabisystems.com>  *  Wasabi NetBSD:  Run with it.
-- NetBSD 1.5 now available on CD-ROM  --  http://www.wasabisystems.com/