Re: Can RDMA testing be done with one system?

On Tue, Jul 28, 2026 at 6:44=E2=80=AFPM Vin=C3=ADcius Ferr=C3=A3o
<[email protected]> wrote:
>
> With one is impossible I think because virtualized RDMA devices never rea=
lly worked well, or=E2=80=A6 I=E2=80=99m unaware of it...
>
> Also there=E2=80=99s no =E2=80=9Cloopback=E2=80=9D for RDMA.
>
> You can use one machine if you have two cards. This works, but both cards=
 must be connected between them, in a point to point network.
>
> If you want I can arrange access to our testing servers. We have not only=
 IB but also RoCEv2.
Thanks for the offer, but I'd like to be able to do testing using FreeBSD's
Netperf cluster, since that is a FreeBSD resource that I can use long term.
(It also happens to be located in Canada, so net access to it might not be
too brutal.)

rick
ps: The Netperf cluster does have two systems with Mellanox cards, but one
      of them is busy, so I thought I'd check, in case I could do
testing with only
      one of them.

>
> Regards,
>
> Sent from my iPhone
>
> > On 28 Jul 2026, at 22:39, Rick Macklem <[email protected]> wrote:
> >
> > =EF=BB=BFHi,
> >
> > I have assumed that a Mellanox NIC will only do RDMA
> > to another system with a Mellanox NIC.
> >
> > Is that correct or is there a way to do RDMA testing
> > with a single system with a single NIC?
> >
> > Thanks for any info, rick
> >