From owner-freebsd-hackers Tue Aug 13 19:13:28 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id TAA27501 for hackers-outgoing; Tue, 13 Aug 1996 19:13:28 -0700 (PDT) Received: from cc-server9.massey.ac.nz (cc-server9.massey.ac.nz [130.123.128.11]) by freefall.freebsd.org (8.7.5/8.7.3) with SMTP id TAA27489 for ; Tue, 13 Aug 1996 19:13:04 -0700 (PDT) Message-Id: <199608140213.TAA27489@freefall.freebsd.org> Received: from tpc-pc1 by cc-server9 with SMTP(PP); Wed, 14 Aug 1996 14:11:23 +1200 X-Sender: CHarding@mail.massey.ac.nz Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Wed, 14 Aug 1996 14:11:22 +1200 To: freebsd-hackers@freebsd.org From: C.R.Harding@massey.ac.nz (Craig Harding) Subject: Re: sio issues (silo overflows on a pentium, locked in ttywait, etc...) X-Mailer: Sender: owner-hackers@freebsd.org X-Loop: FreeBSD.org Precedence: bulk Thomas David Rivers writes: >Seems to me a Pentium 75 should be able to keep up with 19200, and >hopefully be able to do much better... am I the only one tripping >over these sio issues? Is there some other magic to setting rts/cts >that I don't know about? Is there any hope my 386dx with 16550As will >be able to handle anything higher than 19200 without locking up? As a data point: I'm running 2.0.5-RELEASE on a 486SX25 with two serial ports containing real 16550As. Both ports are locked at 57600 and users happily dialin and use one line interactively (on a 14k4 modem) while the other line on the 28k8 modem gets 3400cps receiving approx. 80MB of compressed news per day via Taylor UUCP. No silo overflows. I think the previous message relating to custom single-chip emulation of a 16550A may explain your problems. -- C. ("yes virginia, some of us are still only connected to the Net via UUCP"). -- Craig Harding Editor, Massey University Television Production Centre "I don't know about God, I just think we're handmade" - Polly