Date:	Mon, 16 Aug 93 10:04:21 -0400
From:	DJ Delorie <dj AT ctron DOT com>
To:	eyal AT fir DOT canberra DOT edu DOT au
Cc:	djgpp AT sun DOT soe DOT clarkson DOT edu
Subject:	Re: SVGA page fault: what is the overhead?

> Anyone knows the total page fault machine cycles overhead (this should
> include fault+extender time+griver time+iret time.

two task switches	~400-600 cycles
resetting old pages	8 ands * 3 banks plus logic
setting new pages	8 ands * 3 banks plus logic
programming I/O		unknown

The task switches are the big hit, but they are required for the
general page fault handler.

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