Re: rps perfomance WAS(Re: rps: question

Eric Dumazet
2010-04-14T20:27:43Z

Le mercredi 14 avril 2010 à 16:22 -0400, jamal a écrit :
> On Wed, 2010-04-14 at 12:44 -0700, Stephen Hemminger wrote:
>
> > RPS might also interact with the core turbo boost functionality on Intel chips.
> > Newer chips will make a single core faster if other core can be kept idle.
>
> how well does it work with Linux? Sounds like all i need to do is turn
> on some BIOS feature.
> One of the negatives with multiqueue nics is because the core selection
> is static, you could end up overloading one core while others stay idle.
> This seems to steal cycle capacity from the idle cores and gives it to
> the busy cpus. nice. So i see it as a boost to multiqueue.

Only if more than one flow is involved.

And if you have many flows, chance they will spread several queues...