On Wed, 2007-27-06 at 15:54 -0700, David Miller wrote: > The thing that's really important is that the value is not so > large such that the TX ring can become empty.
In the case of batching, varying the values makes a difference. The logic is that if you can tune it so that the driver takes "sufficiently long" to stay closed the more packets you accumulate at the qdisc and the more you can batch to the driver (when it opens up). Deciding what "sufficiently long" is an art - and i am sure speed dependent. With e1000 at gige 128 seems to be a good value, going above or below that gave lesser performance. cheers, jamal - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
