Article View: comp.sys.mac
Article #36625Re: Virtual Memory INIT
From: Fred Hollander
Date: Mon, 23 Jan 1989 19:57
Date: Mon, 23 Jan 1989 19:57
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In article <2598@cxsea.UUCP> blm@cxsea.UUCP (Brian Matthews) writes: >Shane Looker (shane@chablis.cc.umich.edu) writes: >|In article <8901151644.AA17944@Portia.stanford.edu> name@PORTIA.STANFORD.EDU (tony cooper) writes: >|> What would you do with all that >|>much memory? I guess you could use it as a RAM disk!?! >| >|I sure hope you are joking about this... > >I don't know if Tony was joking or not, but I would certainly consider >using the extra memory as a RAM disk. In fact, I have a paged RAM disk >on my Unix machine. > >out. In the worst case, when the application grows larger than physical >memory, the RAM disk will work like a normal drive. But even in this I don't think so. First the pages of the RAM disk (now on disk) need to be paged into RAM, then another RAM access for the application to get the data. It would certainly be faster to read directly off the disk. I also don't believe that this worst case situtation will be that rare. You seem to be thinking of a single application in memory. We're not talking about paging entire applications, but, small blocks (1-2K). So, the RAM disk will be paged out just as often as any other block that is not used frequently/recently. But seriously, with all the system patches, there's a lot of unused ROM code. How about paging that to disk :). Fred Hollander Computer Science Center Texas Instruments, Inc. holland%ti-csl@csnet-rela The above statements are my own and not representative of Texas Instruments.
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!attcan!uunet!lll-winken!ames!killer!pollux!ti-csl!m2!holland From: holland@m2.csc.ti.com (Fred Hollander) Newsgroups: comp.sys.mac Subject: Re: Virtual Memory INIT Message-ID: <67990@ti-csl.CSNET> Date: 23 Jan 89 19:57:28 GMT References: <8901151644.AA17944@Portia.stanford.edu> <870@mailrus.cc.umich.edu> <2598@cxsea.UUCP> Sender: news@ti-csl.CSNET Reply-To: holland@m2.UUCP (Fred Hollander) Organization: TI Computer Science Center, Dallas Lines: 32