From owner-freebsd-hackers@FreeBSD.ORG Thu Feb 15 08:14:27 2007 Return-Path: X-Original-To: freebsd-hackers@freebsd.org Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id E303216A420 for ; Thu, 15 Feb 2007 08:14:27 +0000 (UTC) (envelope-from peterjeremy@optushome.com.au) Received: from turion.vk2pj.dyndns.org (c220-239-3-125.belrs4.nsw.optusnet.com.au [220.239.3.125]) by mx1.freebsd.org (Postfix) with ESMTP id 6EFA313C4C3 for ; Thu, 15 Feb 2007 08:14:27 +0000 (UTC) (envelope-from peterjeremy@optushome.com.au) Received: from turion.vk2pj.dyndns.org (localhost.vk2pj.dyndns.org [127.0.0.1]) by turion.vk2pj.dyndns.org (8.13.8/8.13.8) with ESMTP id l1F8EQTS001578; Thu, 15 Feb 2007 19:14:26 +1100 (EST) (envelope-from peter@turion.vk2pj.dyndns.org) Received: (from peter@localhost) by turion.vk2pj.dyndns.org (8.13.8/8.13.8/Submit) id l1F8EQdG001577; Thu, 15 Feb 2007 19:14:26 +1100 (EST) (envelope-from peter) Date: Thu, 15 Feb 2007 19:14:26 +1100 From: Peter Jeremy To: Daniel Rudy Message-ID: <20070215081426.GH862@turion.vk2pj.dyndns.org> References: <45CC2DDF.6040600@pacbell.net> <20070212.234959.-432837120.imp@bsdimp.com> <45D2A48F.1010104@pacbell.net> <20070213.232425.-1929114897.imp@bsdimp.com> <45D2C7F8.9050302@pacbell.net> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="yLVHuoLXiP9kZBkt" Content-Disposition: inline In-Reply-To: <45D2C7F8.9050302@pacbell.net> X-PGP-Key: http://members.optusnet.com.au/peterjeremy/pubkey.asc User-Agent: Mutt/1.5.13 (2006-08-11) Cc: freebsd-hackers@freebsd.org Subject: Re: PING: Someone on the core team. (Modem Problem) X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 15 Feb 2007 08:14:28 -0000 --yLVHuoLXiP9kZBkt Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 2007-Feb-14 00:27:36 -0800, Daniel Rudy wrote: >Changing the slot did help. I moved it from slot 3 to slot 1. But, now >it's dropping characters with a port speed of 57600, and I am also >getting irq overrun errors from the kernel too now. This is not good. Interrupt latency is a bit of a sore point but the FIFO trigger level is 8 bytes so getting SILO overflows implies a latency of >1.38msec. Does sio4 report as [FAST] in the dmesg? Unfortunately, there's no easy way to change the FIFO trigger level - you would need to patch the source code (look for FIFO_RX_MEDH in /usr/sys/dev/sio/sio.c if you want to go down this path). > With a port speed of 2400, I do not drop characters. The FIFO is not enabled at speeds at or below 4800bps. --=20 Peter Jeremy --yLVHuoLXiP9kZBkt Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (FreeBSD) iD8DBQFF1BZi/opHv/APuIcRAoU2AJ4keBSDWTKsw/UwtBu/WWSabip0DQCdG4kM aPaUvyoZng4Wrz/Ku8oPPG4= =ZeEt -----END PGP SIGNATURE----- --yLVHuoLXiP9kZBkt--