Messages in this thread |  | | Date | Fri, 28 Sep 2001 12:40:32 +0200 (CEST) | From | Martin Josefsson <> | Subject | Re: How to debug PCI issues? |
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On Thu, 27 Sep 2001, Ben Greear wrote:
> I'm working with a TYAN Tomcat board (i815, Ghz CPU). It's in a 1U > machine with a butterfly riser so that I get two riser connections to > one PCI slot. When I put Intel EEPRO nics in each slot, I can pass > 30Mbps of traffic on each NIC without dropping a single packet > (In two days of running). > > If I run 20Mbps on one of the DLINK ports, I'm fine, but if I run 10Mbps > on two of the DLINK ports, I start seeing dropped packets on every > interface, and port errors like RX-FIFO.
If I run traffic out one port I can get 100Mbit but if I try it with two ports at the same time I cet about 20Mbit per port at best. And I also get a _lot_ of errors but mostly carrier-errors.
> So, I'm thinking that the DLINK NIC must be screwing up the PCI > bus somehow when more than one of it's interfaces is passing any > significant traffic. I have been able to run 10Mbps on all 8 ports > of two DLINKs on an Intel EEA2 (i815) board, so I suspect the MB. > > Does anyone have any ideas how to go about trouble-shooting this > farther? > > Thanks, > Ben > > -- > Ben Greear <greearb@candelatech.com> <Ben_Greear@excite.com> > President of Candela Technologies Inc http://www.candelatech.com > ScryMUD: http://scry.wanfear.com http://scry.wanfear.com/~greear > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >
/Martin
Never argue with an idiot. They drag you down to their level, then beat you with experience.
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