From owner-freebsd-questions Thu Jan 18 17:12:06 1996 Return-Path: owner-questions Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id RAA18791 for questions-outgoing; Thu, 18 Jan 1996 17:12:06 -0800 (PST) Received: from Aspen.Woc.Atinc.COM ([198.138.38.206]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id RAA18664 for ; Thu, 18 Jan 1996 17:12:00 -0800 (PST) Received: (from jmb@localhost) by Aspen.Woc.Atinc.COM (8.6.12/8.6.9) id UAA24034; Thu, 18 Jan 1996 20:09:26 -0500 Date: Thu, 18 Jan 1996 20:09:25 -0500 (EST) From: "Jonathan M. Bresler" X-Sender: jmb@Aspen.Woc.Atinc.COM To: Michael Smith cc: wes@intele.net, questions@FreeBSD.org Subject: Re: delays in ppp solved In-Reply-To: <199601180521.PAA05556@genesis.atrad.adelaide.edu.au> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-questions@FreeBSD.org Precedence: bulk On Thu, 18 Jan 1996, Michael Smith wrote: > Jonathan M. Bresler stands accused of saying: > > > > > Even cheese-less modems will cause some delay, as they have to pause > > > and accumulate enough of the incoming data stream to determine that > > > compression won't be effective. Since this process is re-started > > > each time the communications "turn around", i.e. at each window turn > > > for ftp, these small pauses add up over a long transfer. no me! i did not say that. i said the part below starting with " hmmm.....modem makers" > > This shows somewhat of a failure to understand how windowed protocols > work. 8( > > > hmmm.....modem makers dont know how to buffer? data coming in, > > data getting compressed, data going out. no more data coming in? just > > shove out whatever we got. how slow do you think the processors in > > modems are? some have 68030's inside. give em ram, rom and mechanicals > > and you got decent laser printers :) > > Er. Most 'cheap' modems have 8-bit microcontrollers (Z180/8051) in them. > I've been told of cases where, to obtain the desired throughput, vendors > have skimped on the compression (the hard side of the pair) so that > the processor could keep up. > > > Jonathan M. Bresler FreeBSD Postmaster jmb@FreeBSD.ORG > > -- > ]] Mike Smith, Software Engineer msmith@atrad.adelaide.edu.au [[ > ]] Genesis Software genesis@atrad.adelaide.edu.au [[ > ]] High-speed data acquisition and (GSM mobile) 0411-222-496 [[ > ]] realtime instrument control (ph/fax) +61-8-267-3039 [[ > ]] "Who does BSD?" "We do Chucky, we do." [[ > > Jonathan M. Bresler FreeBSD Postmaster jmb@FreeBSD.ORG play go. ride bike. hack FreeBSD.--ah the good life i am moving to a new job. PLEASE USE: jmb@FreeBSD.ORG