Date: Wed, 3 Mar 1999 16:12:27 -0500 (EST) From: Mikhail Teterin <mi@misha.cisco.com> To: current@freebsd.org Subject: Re: aic0 and CAM Message-ID: <199903032112.QAA19717@misha.cisco.com> In-Reply-To: <Pine.LNX.3.96.990303125000.10312A-100000@shell2.aracnet.com> from Brian Beattie at "Mar 3, 1999 12:58:13 pm"
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> > 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 > > [...] > 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. Yes, tape is the only target on this bus here... From reading the 2.2.8's driver's source I see the DMA is not "yet supported", although the card supports it and lets me choose the drq. Still, the amount of CPU it takes to process an interrupt (CyrixInstead 8x86 at over 200MHz) does not look right.... -mi To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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