Re: [dpdk-users] qdisc errors on 20.11.1 & Azure

[Long Li <longli@microsoft.com>]

Hi Tyler,

Nvidia helped investigate this.

The message "Failed to allocate Tx DevX UAR (BF)" is diagnostic, not error.
We lowered the log level for this to DEBUG in 21.02. If the further UAR allocation with NC mapping succeeds - there is no known issues about PMD operating.
(if both BF/NC fail - no device probing happens, as we saw).
Hence - just ignore the diagnostic message or use 21.05 or apply the commit " net/mlx5: fix UAR allocation diagnostics messages".

Thanks,
Long


> -----Original Message-----
> From: Tyler Blair <tblair@fastmail.com>
> Sent: Tuesday, July 6, 2021 9:11 AM
> To: Stephen Hemminger <stephen@networkplumber.org>
> Cc: users@dpdk.org; Long Li <longli@microsoft.com>
> Subject: Re: [dpdk-users] qdisc errors on 20.11.1 & Azure
> 
> > The next thing to check is version of rdma-core. Long just diagnosed
> > an issue with rdma-core version in Ubuntu 20.4
> 
> That's the version I'm using in my last reply -- from ppa:canonical-
> server/server-backports: 33.1-1ubuntu1~backport20.04-
> 202103240925~ubuntu20.04.1
> 
> Noticed now, but with the new kernal and rdma-core librdmacm-dev from
> backports there are some new mlx5_pci errors. Appears to be working OK
> otherwise though.
> 
> EAL: Detected 8 lcore(s)
> EAL: Detected 1 NUMA nodes
> EAL: Detected static linkage of DPDK
> EAL: Selected IOVA mode 'VA'
> EAL: Probing VFIO support...
> EAL: VFIO support initialized
> EAL: Probe PCI driver: mlx5_pci (15b3:1016) device: 5ed7:00:02.0 (socket 0)
> ** mlx5_pci: Failed to allocate Tx DevX UAR (BF)
> ** mlx5_pci: Failed to allocate Rx DevX UAR (BF)
> ** mlx5_pci: No available register for Sampler.
> ** mlx5_pci: Size 0xFFFF is not power of 2, will be aligned to 0x10000.
> net_vdev_netvsc: probably using routed NetVSC interface "eth1" (index 3)
> tap_nl_dump_ext_ack(): Cannot delete qdisc with handle of zero
> tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid
> tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid
> tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid
> tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid
> tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid
> tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid
> tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid
> tap_nl_dump_ext_ack(): Failed to find qdisc with specified classid
> Warning: NUMA should be configured manually by using --port-numa-config
> and --ring-numa-config parameters along with --numa.
> testpmd: create a new mbuf pool <mb_pool_0>: n=155456, size=2176,
> socket=0
> testpmd: preferred mempool ops selected: ring_mp_mc Warning! port-
> topology=paired and odd forward ports number, the last port will pair with
> itself.
> Configuring Port 1 (socket 0)
> Port 1: 00:22:48:3B:AB:CC
> Checking link statuses...
> 
> Marked with ** - these appear to be pretty benign as well though.
> 
> Regards,
> Tyler