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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!cs.utexas.edu!sun-barr!ames!olivea!charnel!sifon!thunder.mcrcim.mcgill.edu!mouse
- From: mouse@thunder.mcrcim.mcgill.edu (der Mouse)
- Newsgroups: comp.windows.x,comp.sys.sgi
- Subject: Re: X Under Windows NT
- Message-ID: <1992Nov7.102526.19448@thunder.mcrcim.mcgill.edu>
- Date: 7 Nov 92 10:25:26 GMT
- References: <id.5KFU.WOE@ferranti.com> <1992Oct26.221039.29314@decuac.dec.com> <rtonoi0@zola.esd.sgi.com>
- Organization: McGill Research Centre for Intelligent Machines
- Lines: 35
-
- [ Why is this in comp.sys.dec and comp.windows.news? I'm crossposting
- to comp.sys.sgi and removing c.s.dec and c.w.news from followups. ]
-
- In article <rtonoi0@zola.esd.sgi.com>, msc@ramoth.esd.sgi.com (Mark Callow) writes:
- > In article <1992Oct28.170229.29369@news.dfrf.nasa.gov>, todd@fred.dfrf.nasa.gov writes:
-
- >> At NASA we run our realtime flight simulator on an SGI doing the
- >> simulation models in one CPU and out the window visuals in another.
- >> The entire frame runs in under 1ms, I think you have experience with
- >> the wrong machine running X.
- > This example proves nothing. The flight simulator is not an X
- > program.
-
- If it's a modern release of Irix, everything that draws on the display
- is an X program. Or at least such is my understanding of their
- implementation; since I am not privy to full details, I could well be
- wrong. Perhaps some SGI person will be kind enough to give us the full
- truth of the matter.
-
- > If it was an X program there is no way you could generate frames in
- > "under 1 ms".
-
- Why not?
-
- If the display is CRT-based, you can't do more than one frame per
- vertical retrace, but that's not to say you can't do all the crunching
- in 1ms and then sit there idling for the rest of the vertical scan. If
- the display technology is something else (or, barely possibly, is a CRT
- that has a kilohertz frame rate), there's no obvious reason why 1ms is
- out of the question.
-
- der Mouse
-
- mouse@larry.mcrcim.mcgill.edu
-