Date: Wed, 3 Mar 1999 12:58:13 -0800 (PST) From: Brian Beattie <beattie@aracnet.com> To: mi@aldan.algebra.com Cc: current@FreeBSD.ORG, nate@FreeBSD.ORG, gconnor@cisco.com Subject: Re: aic0 and CAM Message-ID: <Pine.LNX.3.96.990303125000.10312A-100000@shell2.aracnet.com> In-Reply-To: <199903031950.OAA19405@misha.cisco.com>
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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
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