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Path: sserve!newshost.anu.edu.au!munnari.oz.au!foxhound.dsto.gov.au!fang.dsto.gov.au!yoyo.aarnet.edu.au!news.adelaide.edu.au!news.cs.su.oz.au!harbinger.cc.monash.edu.au!yeshua.marcam.com!MathWorks.Com!europa.eng.gtefsd.com!howland.reston.ans.net!agate!news.Brown.EDU!noc.near.net!news.delphi.com!usenet From: John Dyson <dysonj@delphi.com> Newsgroups: comp.os.386bsd.questions Subject: Re: linux's I/O calls faster than NetBSD's ? Date: Thu, 10 Mar 94 12:03:28 -0500 Organization: Delphi (info@delphi.com email, 800-695-4005 voice) Lines: 13 Message-ID: <hi+Knpw.dysonj@delphi.com> References: <2lhv9r$pbt@homea.ensta.fr> <2limt7$16k@homea.ensta.fr> <BE3J-z0.dysonj@delphi.com> <CMGCvw.ABF@cogsci.ed.ac.uk> NNTP-Posting-Host: bos1b.delphi.com X-To: Richard Tobin <richard@cogsci.ed.ac.uk> Richard Tobin <richard@cogsci.ed.ac.uk> writes: >This does indeed seem to be the explanation. If you reduce the file >size so that it fits in the buffer cache, it runs as fast as you would >expect. (Interestingly, under NetBSD 0.9 I had to reduce it to about >half the buffer cache size for this to work, but under NetBSD current >it worked up to the full size. Evidently buffer cache performance >has improved between 0.9 and current.) Sorry I did not explain this better, Thanks Richard!!! John dyson@implode.root.com