Date: Mon, 16 Jul 2001 13:42:39 EDT From: Bsdguru@aol.com To: hackers@freebsd.org Subject: Re: NatSemi DP83820 gigE driver kit for 4.2 and 4.3 Message-ID: <3d.e7348af.2884818f@aol.com>
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In a message dated 07/16/2001 1:11:09 PM Eastern Daylight Time, tlambert2@mindspring.com writes: > > How do these perform compared to the more expensive gigabit cards? > > Read the driver. > > In general, they require an extra copy because of the inability > of the card to DMA on a reasonable boundry. > > Bill's commentary in his drivers is frequently enlightening, > and often amusing... 8-). > Maybe at some point he'll "get" that the boundry issue is a pci bus-mastering spec issue and not a controller design flaw, as he seems to harp on this in just about every driver? A more important question is "are these 32-bit cards, and if so, do they have enough internal buffer to do sustained 1GB transfers". Generally 32-bit PCI is too slow for GB, as it cant do sustained 1GB transfers. Some 32-bit GB cards are just a total waste. Bryan To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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