Re: [RFC][PATCH 0/3] beat kswapd with the proverbial clue-bat

[Nick Piggin]

David S. Miller wrote:
> On Sun, 05 Sep 2004 20:09:30 +1000
> Nick Piggin <nickpiggin@xxxxxxxxxxxx> wrote:
>
>
> > Yeah I had seen a few, surprisingly few though. Sorry I'm a bit clueless
> > about networking - I suppose there is a good reason for the 16K MTU? My
> > first thought might be that a 4K one could be better on CPU cache as well
> > as lighter on the mm. I know the networking guys know what they're doing
> > though...
>
>
> It's better to get as long a stride as possible for the copy
> from userspace, and yes as you get larger you run into cache
> issues.  16K turned out the be the break point considering those
> two attributes when I did my testing.

OK. Makes sense.

> Just fool around with ifconfig lo mtu XXX and TCP bandwidth tests.
> See what you come up with.

Thanks, I'll give that a try. I don't nearly have access to a
representitive range of architectures, but if I see anything
interesting on what I've got, I'll ping you.
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