> I still maintain that for arbitrary traffic, you cannot know the > "optimal" MTU, because you don't know what the overheads are. For > protocols with a very high per-packet cost, the DMA overhead of larger > packet might be in the noise, to the point that 9K is even better on the > nxge configuration you've proposed. > > I think the right answer is to document this information in the man page > somewhere like this:
Documentation is useless as a programming interface, which is what e.g., Fishworks needs this for. The application can account for its own overheads and provide whatever clues are necessary to help the driver work together to find the right value, but leaving it to the documentation just doesn't cut it. -- meem _______________________________________________ networking-discuss mailing list [email protected]
