Re: ixg(4) performances

[Hisashi T Fujinaka <htodd%twofifty.com@localhost>]

On Fri, 29 Aug 2014, Emmanuel Dreyfus wrote:

> Terry Moore <tmm%mcci.com@localhost> wrote:
>
> > But it's running at gen1. I strongly suspect that the benchmark case was
> > gen2 (since the ixg is capable of it).
>
> gen1 vs gen2 is 2.5 Gb.s bs 5 Gb/s?

Gen 1 is capable of only 2.5GT/s (gigatransfers per second). Gen 2 is
capable of up to 5, but isn't guaranteed to be 5. Depending on how
chatty the device is on the PCIe bus, I think 2.5GT/s is enough for
something much closer to line rate than you're getting.

--
Hisashi T Fujinaka - htodd%twofifty.com@localhost
BSEE + BSChem + BAEnglish + MSCS + $2.50 = coffee