From owner-freebsd-current Wed Mar 3 12:58:44 1999 Delivered-To: freebsd-current@freebsd.org Received: from jumping-spider.aracnet.com (jumping-spider.aracnet.com [205.159.88.14]) by hub.freebsd.org (Postfix) with ESMTP id E1BBC1568C; Wed, 3 Mar 1999 12:58:36 -0800 (PST) (envelope-from beattie@aracnet.com) Received: from shell2.aracnet.com (IDENT:1728@shell2.aracnet.com [205.159.88.20]) by jumping-spider.aracnet.com (8.9.1/8.9.0) with ESMTP id MAA11370; Wed, 3 Mar 1999 12:58:12 -0800 Received: from localhost by shell2.aracnet.com (8.8.7) id MAA11058; Wed, 3 Mar 1999 12:58:13 -0800 X-Authentication-Warning: shell2.aracnet.com: beattie owned process doing -bs Date: Wed, 3 Mar 1999 12:58:13 -0800 (PST) From: Brian Beattie To: mi@aldan.algebra.com Cc: current@FreeBSD.ORG, nate@FreeBSD.ORG, gconnor@cisco.com Subject: Re: aic0 and CAM In-Reply-To: <199903031950.OAA19405@misha.cisco.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Wed, 3 Mar 1999, Mikhail Teterin wrote: > What's the chance the Adaptec-152x controller (aic0) will soon work > with 3.1-STABLE? > > It has pretty horrible performance problems on 2.2.8-STABLE, even when > using DMA: > > [...] > 4.4%Sys 91.9%Intr 3.7%User 0.0%Nice 0.0%Idl 4244 inact 204 pci irq9 > | | | | | | | | | | 5288 cache 105 aic0 irq11 > ==++++++++++++++++++++++++++++++++++++++++++++++ 248 free 104 wdc0 irq14 > [...] > > (which may, of course, be due to the poor design of the board) and > we were wondering if upgrading to 3.1-STABLE will help us in the > foreseeable future? > I am working on a driver for the 152x and other cards based on the aic6360/6260 chip, and actually making some progress. As to performance I would expect it to be pretty horrible even if I were to get DMA working. The problem is that the aic6360 chip is pretty primative, requireing the CPU to manage much of the SCSI bus signaling. I would not use this type of card for disk if I could avoid it, and probably not for tape either, I have a scanner I plan to use with it. Brian Beattie | The only problem with beattie@aracnet.com | winning the rat race ... www.aracnet.com/~beattie | in the end you're still a rat To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message