[ewg] IPoIB to Ethernet routing performance

sebastien dugue sebastien.dugue at bull.net
Mon Dec 6 23:39:11 PST 2010


 Hi Jason,

On Mon, 6 Dec 2010 14:27:59 -0700
Jason Gunthorpe <jgunthorpe at obsidianresearch.com> wrote:

> On Mon, Dec 06, 2010 at 09:47:42PM +0100, Jabe wrote:
> 
> > Technologies MT25204 [InfiniHost III Lx HCA]; and dual E5430 xeon
> > (not nehalem).
> 
> Newer Mellanox cards have most of the offloads you see for ethernet so
> they get better performance.

  What kind of offload capabilities are you referring to for IPoIB?

> Plus > Nehalem is just better at TCP in
> the first place..

  Well that depends on which Nehalem we're talking about. I've found that the EX
performs more poorly than the EP, though I didn't dig enough to find out why.

  S├ębastien.



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