Date: Wed, 03 Mar 1999 23:44:02 -0700 From: Warner Losh <imp@harmony.village.org> To: "Kenneth D. Merry" <ken@plutotech.com> Cc: mi@aldan.algebra.com, current@FreeBSD.ORG, nate@FreeBSD.ORG, gconnor@cisco.com Subject: Re: aic0 and CAM Message-ID: <199903040644.XAA27813@harmony.village.org> In-Reply-To: Your message of "Wed, 03 Mar 1999 13:50:38 MST." <199903032050.NAA86828@panzer.plutotech.com> References: <199903032050.NAA86828@panzer.plutotech.com>
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In message <199903032050.NAA86828@panzer.plutotech.com> "Kenneth D. Merry" writes: : 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. They can do DMA, but I don't think there is a good way to know if you have a board that supports DMA and it is enabled. Even with DMA, you are limited to horrible perfomance :-( Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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