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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!munnari.OZ.AU!news.ecn.uoknor.edu!feed1.news.erols.com!cpk-news-hub1.bbnplanet.com!news.bbnplanet.com!su-news-hub1.bbnplanet.com!arclight.uoregon.edu!newsfeed.direct.ca!nntp.portal.ca!cynic.portal.ca!not-for-mail From: cjs@cynic.portal.ca (Curt Sampson) Newsgroups: comp.os.linux.misc,comp.os.linux.networking,comp.os.linux.setup,comp.unix.bsd.misc,comp.os.ms-windows.nt.advocacy,comp.os.os2.advocacy Subject: Re: Linux vs whatever Date: 4 Feb 1997 11:14:09 -0800 Organization: Internet Portal Services, Inc. Lines: 24 Message-ID: <5d81q1$8ls@cynic.portal.ca> References: <32DFFEAB.7704@usa.net> <5cov5p$7hu@lynx.dac.neu.edu> <5cphaj$qvg@cynic.portal.ca> <5d7rtu$ao9@rzstud2.rz.uni-karlsruhe.de> NNTP-Posting-Host: cynic.portal.ca Xref: euryale.cc.adfa.oz.au comp.os.linux.misc:155341 comp.os.linux.networking:66780 comp.os.linux.setup:94773 comp.unix.bsd.misc:2166 comp.os.ms-windows.nt.advocacy:51475 comp.os.os2.advocacy:264603 In article <5d7rtu$ao9@rzstud2.rz.uni-karlsruhe.de>, Felix Schroeter <uk1o@rzstud2.rz.uni-karlsruhe.de> wrote: >The Linux NFS clients used 1 KB (!) NFS write requests... >... >The 1KB write size was hardcoded in the Linux (2.0.something) NFS >client implementation. >.... >But slow NFS performance is *no* evidence for slow TCP/IP performance. >The Linux NFS implementation is much more broken than its TCP/IP >implementation can ever be :-/ Try an NFS test with 8 KB blocks, and you'll see just how broken the TCP/IP implementation is. There's a very good reason that Linux uses 1 KB blocks for NFS; the stack will crawl on 8 KB blocks because it has to do an extra copy of all the data every time it reassembles the fragments. (I described this in detail in another post.) cjs -- Curt Sampson cjs@portal.ca Info at http://www.portal.ca/ Internet Portal Services, Inc. Vancouver, BC (604) 257-9400 De gustibus, aut bene aut nihil.