UHD 4.7 DPDK 24.11 RX mbuf alloc failed queue_id=0

[eng3]

Issue Description

The following error is received:

IXGBE_INIT: ixgbe_alloc_rx_queue_mbufs(): RX mbuf alloc failed queue_id=0
IXGBE_INIT: ixgbe_dev_rx_queue_start(): Could not alloc mbuf for queue:0
IXGBE_INIT: ixgbe_dev_start(): Unable to start rxtx queues
IXGBE_INIT: ixgbe_dev_start(): failure in ixgbe_dev_start(): -1

Setup Details

N320 FPGA:XG, 1G to ethernet, 2x10G to QSFP+. Ubuntu 24.04, UHD_4.7.0.0-210-ge75629c3 , DPDK_24.11

Expected Behavior

No error

Steps to reproduce the problem

# /usr/local/lib/uhd/examples/benchmark_rate --rx_rate 250e6 --rx_subdev "A:0 B:0" --rx_channels 0,1 --tx_rate 250e6 --tx_subdev "A:0 B:0" --tx_channels 0,1 --args "addr=192.168.30.2,second_addr=192.168.40.2,mgmt_addr=X.X.X.X,master_clock_rate=250e6,use_dpdk=1"

Actual Behaviour

[INFO] [UHD] linux; GNU C++ version 13.3.0; Boost_108300; DPDK_24.11; UHD_4.7.0.0-210-ge75629c3
EAL: Detected CPU lcores: 8
EAL: Detected NUMA nodes: 1
EAL: Detected shared linkage of DPDK
EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
EAL: Selected IOVA mode 'VA'
EAL: VFIO support initialized
EAL: Using IOMMU type 1 (Type 1)
IXGBE_INIT: ixgbe_alloc_rx_queue_mbufs(): RX mbuf alloc failed queue_id=0
IXGBE_INIT: ixgbe_dev_rx_queue_start(): Could not alloc mbuf for queue:0
IXGBE_INIT: ixgbe_dev_start(): Unable to start rxtx queues
IXGBE_INIT: ixgbe_dev_start(): failure in ixgbe_dev_start(): -1
[ERROR] [DPDK] Port 1: Could not start device
EAL: already called initialization.
[ERROR] [UHD] Device discovery error: RuntimeError: DPDK: Failure to start device
[ERROR] [DPDK] Error with EAL initialization
[ERROR] [X300] X300 Network discovery error RuntimeError: Error with EAL initialization
[00:00:00.000617] Creating the usrp device with: addr=192.168.30.2,second_addr=192.168.40.2,mgmt_addr=129.218.156.110,master_clock_rate=250e6,use_dpdk=1...
EAL: already called initialization.
[ERROR] [DPDK] Error with EAL initialization
[ERROR] [UHD] Device discovery error: RuntimeError: Error with EAL initialization
EAL: already called initialization.
[ERROR] [DPDK] Error with EAL initialization
[ERROR] [X300] X300 Network discovery error RuntimeError: Error with EAL initialization
Error: LookupError: KeyError: No devices found for ----->
Device Address:
addr: 192.168.30.2
second_addr: 192.168.40.2
mgmt_addr: x.x.x.x
master_clock_rate: 250e6
use_dpdk: 1

EAL: Error disabling MSI-X interrupts for fd 32  (this message doesnt always appear depending which version of UHD/DPDK I try)

Additional Information

# dpdk-devbind --status
Network devices using DPDK-compatible driver
============================================
0000:04:00.0 '82599ES 10-Gigabit SFI/SFP+ Network Connection 10fb' drv=vfio-pci unused=
0000:04:00.1 '82599ES 10-Gigabit SFI/SFP+ Network Connection 10fb' drv=vfio-pci unused=

Hugepages seems to be setup:

# dpdk-hugepages.py --show
Node Pages Size Total
0 2048 2Mb 4Gb

Huge page filesystems mounted at: /dev/hugepages

# cat /proc/meminfo | grep Huge
AnonHugePages: 0 kB
ShmemHugePages: 0 kB
FileHugePages: 0 kB
HugePages_Total: 2048
HugePages_Free: 2046
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
Hugetlb: 4194304 kB

I also tried 1G hugepages

uhd.conf

[use_dpdk=1]
dpdk_mtu=9000
dpdk_driver=/usr/local/lib/x86_64-linux-gnu/dpdk/pmds-25.0/
dpdk_corelist=2,3,4
dpdk_num_mbufs=4095
dpdk_mbuf_cache_size=315

[dpdk_mac=e8:ea:6a:06:34:58]
dpdk_lcore = 3
dpdk_ipv4 = 192.168.30.1/24
dpdk_num_desc = 4096

[dpdk_mac=e8:ea:6a:06:34:59]
dpdk_lcore = 4
dpdk_ipv4 = 192.168.40.1/24
dpdk_num_desc = 4096

[eng3]

I was using the example which had:
dpdk_num_mbufs=4095
dpdk_mbuf_cache_size=315

When I set them to something that was a power of 2 4096/512, it seemed to resolve the error