From:	eyal AT fir DOT canberra DOT edu DOT au (Eyal Lebedinsky)
Subject:	SVGA page fault: what is the overhead?
To:	djgpp AT sun DOT soe DOT clarkson DOT edu
Date:	Sun, 15 Aug 93 11:17:36 EST

Hello ,

Having got a fast replacement for the drawing graphics, I compared it
with my 16-bit version. It runs with identical timing except for when
a page is crossed, when a severe performance degradation is noticed.

The 16bit code checks for page crossing in the main loop, the djgpp version
trusts the page fault handler.

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

-- 
Regards
	Eyal Lebedinsky		eyal AT ise DOT canberra DOT edu DOT au

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