From: jamal <[EMAIL PROTECTED]> Date: Wed, 27 Jun 2007 20:15:47 -0400
> 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. Right. And another thing you want to moderate is lock hold times, perhaps even at the slight expense of performance. - 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
