ix(intel) vs mlxen(mellanox) 10Gb performance

[Daniel Braniss]

> On Aug 17, 2015, at 1:41 PM, Christopher Forgeron <csforgeron at gmail.com> wrote:
> 
> FYI, I can regularly hit 9.3 Gib/s with my Intel X520-DA2's and FreeBSD 10.1. Before 10.1 it was less.
> 

this is NOT iperf/3 where i do get close to wire speed,
it’s NFS writes, i.e., almost real work :-)

> I used to tweak the card settings, but now it's just stock. You may want to check your settings, the Mellanox may just have better defaults for your switch. 
> 
> On Mon, Aug 17, 2015 at 6:41 AM, Slawa Olhovchenkov <slw at zxy.spb.ru <mailto:slw at zxy.spb.ru>> wrote:
> On Mon, Aug 17, 2015 at 10:27:41AM +0300, Daniel Braniss wrote:
> 
> > hi,
> >       I have a host (Dell R730) with both cards, connected to an HP8200 switch at 10Gb.
> >       when writing to the same storage (netapp) this is what I get:
> >               ix0:            ~130MGB/s
> >               mlxen0  ~330MGB/s
> >       this is via nfs/tcpv3
> >
> >       I can get similar (bad) performance with the mellanox if I increase the file size
> >       to 512MGB.
> 
> Look like mellanox have internal beffer for caching and do ACK acclerating.
> 
> >       so at face value, it seems the mlxen does a better use of resources than the intel.
> >       Any ideas how to improve ix/intel's performance?
> 
> Are you sure about netapp performance?
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