Re: Correct 3c905 model?
Bogdan Costescu <[email protected]> Sat, 1 Nov 2003 00:00:52 +0100 (CET)
| Newsgroups | gmane.linux.drivers.vortex.devel |
|---|---|
| Message-ID | <Pine.LNX.4.44.0310312349510.5951-100000@kenzo.iwr.uni-heidelberg.de> |
On Fri, 31 Oct 2003, Rodrigo Severo wrote: > Which model to I have exactly? I am sending the output of vortex-diag -aemf. As the output says, you have a Boomerang card a.k.a 3C905 (no letter). This is an older generation card with MII (including autonegotiation) on a separate chip as opposed to included on-chip for 3C905C; this however doesn't make so much of a difference. The bigger difference might be in the DMA engine; the newer 3C905B and 3C905C can poll a memory location to find out if a new packet is queued while the older cards like the 3C905 need the CPU to actively do I/O, which means lots of CPU cycles wasted for today's fast CPUs - this feature is used by the Scyld driver, not used by the driver distributed with the kernel. The newer cards (905B and 905C) also have a better (and more customizable) usage of the PCI bus. These are all theoretical differences. As I don't have any Boomerang card, I cannot comment on the difference that it makes in practice... -- Bogdan Costescu IWR - Interdisziplinaeres Zentrum fuer Wissenschaftliches Rechnen Universitaet Heidelberg, INF 368, D-69120 Heidelberg, GERMANY Telephone: +49 6221 54 8869, Telefax: +49 6221 54 8868 E-mail: [email protected] _______________________________________________ vortex mailing list [email protected] http://www.scyld.com/mailman/listinfo/vortex