Re: [PATCH v2] tcp: splice as many packets as possible at once

Evgeniy Polyakov
2009-02-04T08:09:13Z

On Tue, Feb 03, 2009 at 04:46:09PM -0800, David Miller (davem@davemloft.net) wrote:
> > NTA tried to solve this by not allowing to free the data allocated on
> > the different CPU, contrary to what SLAB does. Modulo cache coherency
> > improvements,
>
> This could kill performance on NUMA systems if we are not careful.
>
> If we ever consider NTA seriously, these issues would need to
> be performance tested.

Quite contrary I think. Memory is allocated and freed on the same CPU,
which means on the same memory domain, closest to the CPU in question.

I did not test NUMA though, but NTA performance on the usual CPU (it is
2.5 years old already :) was noticebly good.

--
Evgeniy Polyakov