Date: Wed, 31 Oct 2001 10:48:13 -0800 From: Terry Lambert <tlambert2@mindspring.com> To: mjacob@feral.com Cc: Wilko Bulte <wkb@freebie.xs4all.nl>, Nick Rogness <nick@rogness.net>, freebsd-hackers@FreeBSD.ORG Subject: Re: Driver help Message-ID: <3BE0476D.EBEA9067@mindspring.com> References: <Pine.BSF.4.21.0110311034370.26072-100000@beppo>
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Matthew Jacob wrote: > > "dumb" is relative and fungible. > > It's a tradeoff between doing the connection management in firmware (as with > the QLogic) or in the Kernel (as with Tachyon products mostly). It depends on > whom you believe ultimately does a better job. > > Doing it in firmware allows the driver writer to manage the ULP stuff a lot > better because you're not so distracted by the low level ruckus. > > Doing it in the kernel allows you to avoid all those nagging and persistent > questions of "why the hell did the f/w do/say/barf&&turn-left-against-a-red > *that*?" I'm personally a "firm" believer in having the card do the work so as to avoid the unnecessary bus transfers from the kernel doing the work. Alfred and Eric Melville both have incredibly funny anecdotes about Windows machines without GL accelerators configured as servers, and with GL screen savers which eat most of the CPU away from server applications... -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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