Messages in this thread | | | Date | Fri, 12 Mar 1999 11:17:00 +0100 | From | gandalf <> | Subject | Re: eepro100 frame errors with SMP |
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>Langis, Richard wrote: >> I'm no expert on anything, but I DO have a quad-processor system with one >> Pro/100B and one Pro/100+, running kernel 2.2.0. ifconfig shows no TX (or >> RX, for that matter) errors. cat /proc/pci shows latency at 128 for both >> adapters. > >It is especially the OTHER PCI devices that are interesting in this >respect. > >I have the impression that some chipsets can get into a state where >the CPU is banging on main-memory, that PCI busmasters don't get their >bandwidth requirement.
I once struggled with similar problems when using an eepro100 in an 2.2.x SMP system. I was getting heavy (>10%) packet loss on that interface, but I tracked the problem down to be something between the eepro100 and that cheap (Lantronix) 10mbit switch i was using... Attached to a 3com 10/100 switch, I wasn't getting any packet loss at all with the eepro100. This was definitely _not_ a speed-autosensing failure, I set the card manually to all possible speeds / duplex values...
Another funny thing about this Lantronix "switch" was that it was causing collisions as well (how on earth is that possible on a switch?)
I ended up upgrading that switch with a 3com 10/100mbit autosensing switch and everything is working just fine.
gandalf
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