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Article #957Re: New RISC workstations / 88110 demise
From: Doug DeJulio
Date: Fri, 06 Nov 1992 21:22
Date: Fri, 06 Nov 1992 21:22
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In article <1992Nov5.070604.2071@cubetech.com> andrew@cubetech.com writes: >Dedicating processors is stupid (a whole P5 for sound? what a waste). >Let mach split everything up on all the processors and use thread >priorities to ensure good interactive performance. I'd buy this argument *IF* NeXT's OS had good realtime support. However Mach 2.0 (upon which NeXT mach is based) is just not a realtime OS, and you can't do realtime operations with it. User interaction needs to be done by realtime tasks. That's the main reason I was reccomending dedicated chips. No realtime means no reliable synched animation and sound, which sucks on a multimedia workstation. If NeXT upgraded to Mach 3, perhaps they could get realtime performance by running the display and sound servers at a higher priority than the Unix emulation task, but in Mach 2 the unix emulation is built into the Mach kernel so that can't be done. Correct me if I'm wrong. -- Doug DeJulio ddj+@cmu.edu
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Newsgroups: comp.sys.next.hardware Path: arc1-ca.pugleaf.net!sparky!uunet!ukma!wupost!udel!rochester!cantaloupe.srv.cs.cmu.edu!ddj From: ddj+@cs.cmu.edu (Doug DeJulio) Subject: Re: New RISC workstations / 88110 demise Message-ID: <BxBCpM.65B.2@cs.cmu.edu> Keywords: RISC Sender: news@cs.cmu.edu (Usenet News System) Nntp-Posting-Host: itc.cs.cmu.edu Organization: School of Computer Science, Carnegie Mellon References: <1992Nov2.170741.2092@jhunix.hcf.jhu.edu> <Bx5Iwn.to.2@cs.cmu.edu> <1992Nov5.070604.2071@cubetech.com> Date: Fri, 6 Nov 1992 21:22:31 GMT Lines: 22