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

[Slawa Olhovchenkov]

On Mon, Aug 17, 2015 at 01:49:27PM +0200, Alban Hertroys wrote:

> On 17 August 2015 at 13:39, Slawa Olhovchenkov <slw at zxy.spb.ru> wrote:
> 
> > In any case, for 10Gb expect about 1200MGB/s.
> 
> Your usage of units is confusing. Above you claim you expect 1200

I am use as topic starter and expect MeGaBytes per second

> million gigabytes per second, or 1.2 * 10^18 Bytes/s. I don't think
> any known network interface can do that, including highly experimental
> ones.
> 
> I suspect you intended to claim that you expect 1.2GB/s (Gigabytes per
> second) over that 10Gb/s (Gigabits per second) network.
> That's still on the high side of what's possible. On TCP/IP there is
> some TCP overhead, so 1.0 GB/s is probably more realistic.

TCP give 5-7% overhead (include retrasmits).
10^9/8*0.97 = 1.2125