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

[Daniel Braniss]

> On Aug 17, 2015, at 12:41 PM, Slawa Olhovchenkov <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.
what ever they are doing, it’s impressive :-)

> 
>> 	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?

yes, and why should it act differently if the request is coming from the same host? in any case
the numbers are quiet consistent since I have measured it from several hosts, and at different times.

danny