On Wed, 2005-07-12 at 14:11 -0800, David S. Miller wrote: > From: Eric Dumazet <[EMAIL PROTECTED]> > Date: Wed, 07 Dec 2005 23:04:04 +0100 > > > Another try could be to do some benchmarks about NET_IP_ALIGN being a valid > > optimization nowadays : > > Maybe setting it to 0 in e1000 driver could give better results. > > Could somebody give it a try ? > > NET_IP_ALIGN is a two-folded thing: > > 1) Getting IP headers aligned > 2) Getting good DMA strides (this is why ppc sets it to zero). > > So, keep that in mind. > > On x86 you won't get the unaligned traps, but on other platforms > you will and I know that the ia64 folks will get a couple > megabytes of unaligned memory access trap kernel logs when > their machine boots and will rightfully scream bloody murder > as a result. > > So you can set it to zero if you want on x86 systems, but even > there I really don't recommend it.
I can give this a try tommorow as well if Robert doesnt beat me to it. 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
