[ewg] [Fwd: Re: [ofa-general] IPOIB/CM increase retry counts]

[Ralph Campbell]

The setup is two nodes, any QLogic HCA, running IPoIB-CM with
65520 MTU running netperf, iperf, etc.
I haven't tried mixed sets of QLogic & Mellanox but I wouldn't
be surprised to find similar results.
It does vary somewhat from distro to distro, kernel
version, TCP parameters, etc. but is easily reproducible.
I also haven't had time to investigate the causes.

On Thu, 2008-02-14 at 10:40 +0200, Or Gerlitz wrote:
> Ralph Campbell wrote:
> > Yes. I see RNR NAKs with IPoIB connected mode quite often.
> 
> What is the setup one needs to make it happen? is it only when each node 
> has different HCA or it happens also on a homogeneous setup?
> 
> Or