On Sun, 2004-12-05 at 18:44, Ray Lehtiniemi wrote:
> i'm trying to understand how to tune a pair of e1000 cards in
> a server box. the box is a dual xeon 3.06 with hyperthreading,
> using the intel e7501 chipset, with both cards on hub interface
> D. the application involves small UDP packets, generally under
These are 82544 cards hanging of P64H2, so they're running at PCI-X, but
at what speed? Run ethtool -d eth<x> | grep Bus. The cards support
133Mhz, but having them adjacent on the same P64H2 probably bumps them
down to 100Mhz. Can you put one on D and the other on another bus?
> 300 bytes. i need to maximize the number of packets per second
> transferred between the two cards.
There is a lot of current traffic on netdev about this topic. netdev is
the official e1000 mailing this weekend. :-)
> at the moment, i'm looking at the PCI bus in this box to see
> what might be tweakable. lspci output for the relevant parts is
> attached below.
>
> could anyone give me an idea:
>
> - what kind of packets per second i could expect to achieve
> from this particular system (for small packets)
What kind of numbers are you getting?
What kernel are you using?
What driver tweaks have you made, if any?
-scott
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