Article View: comp.arch
Article #2344Re: *big iron*
From: Lehtinen Pertti
Date: Wed, 27 Sep 1989 09:21
Date: Wed, 27 Sep 1989 09:21
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From article <1989Sep26.163307.17238@utzoo.uucp>, by henry@utzoo.uucp (Henry Spencer): > In article <7997@cbmvax.UUCP> jesup@cbmvax.UUCP (Randell Jesup) writes: >>... most Unix machines are handicapped by the "standard" unix fs/disk >>cache. This cache requires them to do single-block reads, while under AmigaDos >>the filesystem can ask for large blocks and have it transfered by DMA directly >>from disk to where the application's read goes to... > > It's quite possible to do this under Unix as well, of course, if you've got > kernel people who seriously care about I/O performance. Yes, and if your DMA-controller can manage user buffers spreading across several pages all over your memory. -- pl@tut.fi ! All opinions expressed above are Pertti Lehtinen ! purely offending and in subject Tampere University of Technology ! to change without any further Software Systems Laboratory ! notice
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Path: arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!uunet!mcsun!sunic!tut!pl From: pl@etana.tut.fi (Lehtinen Pertti) Newsgroups: comp.arch Subject: Re: *big iron* Message-ID: <8833@etana.tut.fi> Date: 27 Sep 89 09:21:04 GMT References: <1989Sep26.163307.17238@utzoo.uucp> Sender: News@tut.fi Lines: 18