[External] : Re: qdisc errors on Azure VM (TAP Config)

[Dattu Gundu]

Hi Stephen, 

As Microsoft recommended in the below link to use the failsafe PMD in the AZURE.
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https://learn.microsoft.com/en-us/azure/virtual-network/setup-dpdk#failsafe-pmd
So, we are using the failsafe/tap/vdev_netvsc in AZURE cloud VM's. 
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Am I referring to the old link ? 
Is there any further update from Microsoft on the recommended PMD on AZURE? Did I miss any?  
It would be helpful if you share any pointers to the same ?



Actually, we don't have any functional issues. 
Also, the below errors are not a big problem for us.
But only request is do we have any way to suppress them ?

net_vdev_netvsc: probably using routed NetVSC interface "s1p0" (index 8)
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
net_vdev_netvsc: probably using routed NetVSC interface "s0p0" (index 7)
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


Thanks,
Raghava Dattu.

-----Original Message-----
From: Stephen Hemminger <stephen at networkplumber.org> 
Sent: Wednesday, October 12, 2022 10:41 PM
To: Dattu Gundu <dattu.gundu at oracle.com>
Cc: users at dpdk.org
Subject: Re: [External] : Re: qdisc errors on Azure VM (TAP Config)

On Wed, 12 Oct 2022 11:14:50 +0000
Dattu Gundu <dattu.gundu at oracle.com> wrote:

> Hi Stephen, 
> 
> Attached is the configuration params copied in the text file. 
> Please let me know your pointers on the same. 

Config looks like it should work.
Why are you not using the native netvsc PMD instead?

Failsafe/Tap/vdev_netvsc is excessively complex, and is slower.