[dpdk-dev] MLX5 QP creation failure - cannot allocate memory

[Yongseok Koh]

> On Jan 16, 2019, at 1:07 PM, Amedeo Sapio <amedeo.sapio at gmail.com> wrote:
> 
> Hi all,
> 
> I am developing a DPDK program using a Mellanox ConnectX-5 100G.
> My program starts N workers (one per core), and each worker deals with its
> own dedicated TX and RX queue, therefore I need to setup N TX and N RX
> queues.
> 
> For each RX queue I create a mbuf pool with:
> n = 262144
> cache size = 512
> priv_size = 0
> data_room_size = RTE_MBUF_DEFAULT_BUF_SIZE
> 
> For N<=4 everything works fine, but with N=8,  'rte_eth_dev_start' returns:
> "Unknown error -12"
> and the following error:
> net_mlx5: port 0 Tx queue 0 QP creation failure
> net_mlx5: port 0 Tx queue allocation failed: Cannot allocate memory
> 
> I tried
> - to increment the number of Hugepages (up to 64x1G)
> - change the pool size in different ways
> - both dpdk 18.05 and 18.11
> 
> but with no success. Do you have any suggestions on what could be the issue?

Copying Erez and Kran.

Thanks,
Yongseok