[USRP-users] DPDK runtime error

Florian Kaltenberger florian.kaltenberger at eurecom.fr
Thu Jan 9 04:34:20 EST 2020

Hi Aaron,

thanks for spotting this! Indeed that was a mistake. I also had to 
adjust the dpdk-num-mbufs=4059 and dpdk-mbuf-cache-size=315 like in the 
example configuration file for uhd 3.15.0 and then it worked! Yay!

Now lets see if OpenAirInterface runs more stable with this! :)


On 1/8/2020 17:31, Aaron Rossetto via USRP-users wrote:

> Hello Florian,
> I believe in UHD 3.15, the keys in the uhd.conf file use dashes (-), not underscores between words, e.g.:
> [dpdk-mac=00:11:22:33:44:55]
> dpdk-io-cpu = 1
> dpdk-ipv4 =
> Hope that helps,
> Aaron
> From: USRP-users <usrp-users-bounces at lists.ettus.com> On Behalf Of Florian Kaltenberger via USRP-users
> Sent: Wednesday, January 8, 2020 10:10 AM
> Subject: [EXTERNAL] Re: [USRP-users] DPDK runtime error
> Hi,
> we now installed DPDK 17.11 but I still have exactly the same problem.
> I have a feeling the problem is that I am not addressing the device correctly. Here is what I did:
> The USRP is connected to ethernet interfaces "p1p2" (mac_addr 64:9d:99:b1:1e:8d) and "p1p4" (mac_addr 64:9d:99:b1:1e:8f) which are originally configured with IP addresses and inet_addr This configuration works fine without dpdk.
> Then I deactivate these two interfaces using "ifconfig p1p2 down" "ifconfig p1p4 down"and do "dpdk-devbind --bind=vfio-pci 01:00.1" and "dpdk-devbind --bind=vfio-pci 01:00.3". The status of "dpdk-devbind -s" is below.
> In the file /etc/uhd/uhd.conf I specify
> [dpdk_mac=64:9d:99:b1:1e:8d]
> dpdk_io_cpu = 1
> dpdk_ipv4 =
> [dpdk_mac=64:9d:99:b1:1e:8f]
> dpdk_io_cpu = 2
> dpdk_ipv4 =
> Is this the correct way of specifying it? What surprises me is that DPDK requires to address the device by its PCI address while UHD still requires to set the IP addresses.
> Florian.
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