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From: Alex Kiselev <kiselev99@gmail.com>
Date: Fri, 14 Jul 2017 11:23:51 +0300
Message-ID: <CAMKNYbz2FK_XZyFj4JQsU4u+FLbgEgJOLGH2VCVunAXgGnBj5w@mail.gmail.com>
To: users <users@dpdk.org>, declan.doherty@intel.com
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Subject: [dpdk-users] TX descriptor is not done,
	bonding driver LACP mode issues
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Hi.

I will try to describe my problem shortly again so you don't need to
start reading the first posts in my thread "bonding driver LACP mode
issues".

I am having problems with bonding driver. The problems appeared right
after I switched from using two i40e ports to a single bonding port
build on top of the two i40e ports. Before changing the configuration
my application had been working for weeks without any problems.

I found out that after some time of normal operations tx queue 0 stop
transmitting with the error "TX descriptor is not done"

I google a little bit about "TX descriptor is not done" error and
found a discussion "NIC Stops Transmitting" where a guy was having the
same issues that I do.
http://dpdk.org/ml/archives/dev/2013-July/000357.html

One of the proposals to fix that problem was to check
pthresh/hthresh/wthresh values.

So, I start checking and found out that rte_eth_dev_info_get return 0
for for pthresh/hthresh/wthresh field, but recommended/default values
of this fields from i40e driver are completly different.

So far, it looks like this is what causing the bond port to stop
transmitting packets.

Is this a bug or a feature?

--
Alex Kiselev