From owner-freebsd-hackers Mon Oct 27 18:41:36 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id SAA17564 for hackers-outgoing; Mon, 27 Oct 1997 18:41:36 -0800 (PST) (envelope-from owner-freebsd-hackers) Received: from elvis.vnet.net (elvis.vnet.net [166.82.1.5]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id SAA17526 for ; Mon, 27 Oct 1997 18:41:24 -0800 (PST) (envelope-from rivers@dignus.com) Received: from ponds.dignus.com (ponds.vnet.net [166.82.177.48]) by elvis.vnet.net (8.8.5/8.8.4) with ESMTP id VAA10450 for ; Mon, 27 Oct 1997 21:41:19 -0500 (EST) Received: from lakes.dignus.com (lakes [10.0.0.3]) by ponds.dignus.com (8.8.5/8.8.5) with ESMTP id VAA01683 for ; Mon, 27 Oct 1997 21:57:45 -0500 (EST) Received: (from rivers@localhost) by lakes.dignus.com (8.8.5/8.6.9) id VAA05306 for freebsd-hackers@freefall.cdrom.com; Mon, 27 Oct 1997 21:47:04 -0500 (EST) Date: Mon, 27 Oct 1997 21:47:04 -0500 (EST) From: Thomas David Rivers Message-Id: <199710280247.VAA05306@lakes.dignus.com> To: freebsd-hackers@freefall.FreeBSD.org Subject: sio silo overflows on a P75 @ 38400 baud? Sender: owner-freebsd-hackers@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk I was just wondering - should it be possible, at 38400 baud, in multi-user mode, but nothing else really going on; to get silo overflows on a P75 with 16550 (clone?) UARTs? I'm doing a SL/IP connection and sending the output of dd'ing a tape back to the P75 system for un-tarring. The sending system is a P200 (running FreeBSD 2.2-970510.) I'm getting these silo overflows with 2.2.5. I'm hoping someone can whip out some figures on the interrupt latency to suggest that a P75 should be able to deal with receiving 38400... This could, of course, be an artifact of some device holding the bus too long. The P75 machine is a laptop with a IDE drive (to which I'm writting) and 8 meg of memory; again, running 2.2.5-RELEASE. - Thanks - - Dave Rivers -