[USRP-users] X310 with DPDK

Rob Kossler rkossler at nd.edu
Wed Jul 22 15:00:50 EDT 2020


I have used DPDK with the X310.  I don't recall specifically, but I'm
pretty sure you either...
a) don't specify mgmt_addr, or
b) specify it the same as addr


On Tue, Jul 21, 2020 at 12:12 PM Marcus D. Leech via USRP-users <
usrp-users at lists.ettus.com> wrote:

> On 07/21/2020 10:53 AM, Carmichael, Ryan via USRP-users wrote:
>
> On the DPDK page (https://files.ettus.com/manual/page_dpdk.html) the
> following statement is made:
>
>
>
> “Device discovery via DPDK is not currently implemented, so the device
> args mgmt_addr, addr, and second_addr (if applicable) must all be
> specified at runtime. There is no mechanism for MPM's TCP/IP control
> traffic to flow over a link that is occupied by DPDK, so mgmt_addr must
> point to a link that is not used for CHDR, such as N310's RJ45 port.”
>
>
>
> I’ve been using the X310 without DPDK with dual 10Gb SPI/SFP+ connections
> (192.168.30.2, 192.168.40.2). Once I start DPDK, ifconfig no longer shows
> the NICs at all, which I assume is what it is supposed to be doing. My
> question is, what is the ‘mgmt_addr’ ? I’ve never used it before when using
> the X310. And how do I make sure the mgmt_addr isn’t using a CHDR link? The
> X310 only has two RJ45s, right – and they’re both being used by DPDK.
>
>
>
> Thanks,
>
> -          Ryan
>
>
>
>
>
>
>
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>
>
> *Ignore my last. Yes, the X310 has only the two ports.   I was suffering
> from cognitive pollution between the N310 and X310. So, this is an
> excellent point.   I don't use DPDK myself, since my hosts don't have the
> right NICs, and it's really only justified for very high   sample rates.
> Also, X310 is not an MPM device, so the comments about MPM traffic aren't
> relevant to X310 as far as I know. *
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