netdev - Re: [PATCH net-next] net: allocate skbs on local node

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Message-Id: <20101012005856.994bea6d.akpm@linux-foundation.org>
Date:	Tue, 12 Oct 2010 00:58:56 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	David Miller <davem@...emloft.net>,
	netdev <netdev@...r.kernel.org>,
	Michael Chan <mchan@...adcom.com>,
	Eilon Greenstein <eilong@...adcom.com>,
	Christoph Hellwig <hch@....de>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Pekka Enberg <penberg@...helsinki.fi>
Subject: Re: [PATCH net-next] net:  allocate skbs on local node

On Tue, 12 Oct 2010 09:49:53 +0200 Eric Dumazet <eric.dumazet@...il.com> wrote:

> Le mardi 12 octobre 2010 à 00:24 -0700, Andrew Morton a écrit :
> 
> > I'd love to forget it, but it's faster for some things (I forget
> > which).  Which is why it's still around.
> 
> Yes, two years ago it was true on pathological/obscure cases.
> Every time I did the comparison, SLUB won.
> You asked me, I did yet another test this morning, and 40% is pretty
> serious, I believe.
> 
> > 
> > And the ghastly thing about this is that you're forced to care about it
> > too because some people are, apparently, still using it.
> > 
> 
> Yes, some people (in my company) still use linux 2.6.9 32bit on HP G6/G7
> machines, I know...
> 
> I am not saying we should not care, but for any serious network workload
> on NUMA arches, SLUB is the best, and seeing Christoph recent work, it
> might even get better.
> 
> BTW, I believe all modern distros ship SLUB, dont they ?
> 

Dunno.

Pekka, why haven't we deleted slab yet??
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