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Path: sserve!newshost.anu.edu.au!munnari.oz.au!news.Hawaii.Edu!ames!elroy.jpl.nasa.gov!swrinde!cs.utexas.edu!uunet!newsflash.concordia.ca!sifon!homer.cs.mcgill.ca!storm From: storm@cs.mcgill.ca (Marc WANDSCHNEIDER) Newsgroups: comp.os.386bsd.questions Subject: Re: NetBSD - routing and slip Date: 12 Jan 1994 20:48:09 GMT Organization: SOCS, McGill University, Montreal, Canada Lines: 40 Message-ID: <2h1nm9$147@homer.cs.mcgill.ca> References: <2gv4lc$l0i@darkstar.UCSC.EDU> <1994Jan12.142552.6187@jupiter.sun.csd.unb.ca> <CJJ0w6.ADo@usenet.ucs.indiana.edu> NNTP-Posting-Host: mnementh.cs.mcgill.ca In article <CJJ0w6.ADo@usenet.ucs.indiana.edu>, Jim Pitts <pitts@mimosa.astro.indiana.edu> wrote: >In article <1994Jan12.142552.6187@jupiter.sun.csd.unb.ca>, > >>I can get up to 3000 Chars/Sec on kermit transferring binary (gzip'd) files. > ^^^^^^^^^^^^^^ ^^^^^^ >> >>My machine by the way is a 386DX/25 w 8M Ram and X running constantly. >> > >I find this -very- hard to believe. I have basically the same set up except >that I run FreeBSD, the sio device drivers, have a faster CPU and use zmodem >rather than kermit (I also use ftp with ppp). I am luck to get 1.2 K/s transfer >rate with a 16550A. Either I am doing something drastically wrong or you are >doing something drastically correct. > >I realize that the sio drivers are a slow down, and the 'new' kermit is much >more efficent than it used to be ... but a factor of 2 or more? > >If this sort of performance is really possbile, I would be intrested in seeing >a discussion on how to get to that level. it's not. you can't compress a gzip file much more than maybe a couple of percent, and i think that v42bis isn't willing to spend that much time finding out. thus, the max transfer rate is about 1400-1500cps on a 14,4 modem with gzip'd binaries. i see about 1450 on the stock 0.9 com driver with a 16550 on my machine [fast 486, but isaw the same number on a 386/40] marc 'em. -- ----------------------------------------------------------------------------- Marc Wandschneider Seattle, WA Barney the Dinosaur sings! You faint... Barney sings! Barney sings! --More-- You Die... --More--