Date: Wed, 3 Mar 1999 13:50:38 -0700 (MST) From: "Kenneth D. Merry" <ken@plutotech.com> To: mi@aldan.algebra.com Cc: current@FreeBSD.ORG, nate@FreeBSD.ORG, gconnor@cisco.com Subject: Re: aic0 and CAM Message-ID: <199903032050.NAA86828@panzer.plutotech.com> In-Reply-To: <199903031950.OAA19405@misha.cisco.com> from Mikhail Teterin at "Mar 3, 1999 2:50:31 pm"
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Mikhail Teterin wrote... > What's the chance the Adaptec-152x controller (aic0) will soon work > with 3.1-STABLE? I think the chances are very slim that it will work soon with 3.x or 4.x. It may get done at some point, but I don't think anyone is actively working on it at the moment. > 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? The 152x boards are programmed I/O only, I believe. They don't do DMA. So it won't matter if the driver is rewritten for CAM, you'll still get lousy performance from the board. If you need a supported ISA controller, the Adaptec 154x controllers are supported, as are the Advansys ISA controllers. Both support DMA, and should give you much better performance. Ken -- Kenneth Merry ken@plutotech.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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