[ofa-general] Re: minutes from socket over RDMA discussion at workshop

[Michael S. Tsirkin]

> Quoting Rick Jones <rick.jones2 at hp.com>:
> Subject: Re: minutes from socket over RDMA discussion at workshop
> 
> Michael S. Tsirkin wrote:
> >>                            Bulk Transfer                  "Latency"
> >>                        Unidir            Bidir
> >>   Card          Mbit/s SDx   SDr   Mbit/s SDx   SDr   Tran/s SDx   SDr
> >>---------------------------------------------------------------------------
> >>                  nnnn  nnnnn nnnnn  nnnn  nnnnn nnnnn  nnnnn nnnnn nnnnn
> >>AD313A  IPoIB     2970  4.418 4.544  3530  3.59  3.95   19290 n/a   n/a
> >>AD313A  SDP       7810  0.453 1.048 12820  0.69  0.68   38030 26.29 26.29
> >>AD313A  SDP p=0   7810  0.346 0.527 12670  0.42  0.043  19380 n/a   n/a
> >
> >
> >What's AD313A? What's the MTU for IPoIB (in OFED 1.2 it defaults to 64K)?
> 
> 
> The OFED is whatever is in RHEL5 - someone said that might be 1.1.

So you are not comparing apples to apples:
SPD uses buffers of 64K, IPoIB datagram mode - 2K.

> I had 
> some problems getting all of it removed enough to get 1.2 to load there - 
> in particular the ib_sdp stuff.

Report the problem, people'll try to help.

-- 
MST