On 05.12.2018 17:20, Slava Shwartsman wrote: > Author: slavash > Date: Wed Dec 5 14:20:57 2018 > New Revision: 341578 > URL: https://svnweb.freebsd.org/changeset/base/341578 > > Log: > mlx5en: Remove the DRBR and associated logic in the transmit path. > > The hardware queues are deep enough currently and using the DRBR and > associated > callbacks only leads to more task switching in the TX path. The is also a > race > setting the queue_state which can lead to hung TX rings.
JFYI. We have compared the same router+firewall workloads on the host with this change and before, and I can say, that without DRBR on TX now we constantly have several percents of packets drops due to ENOBUFS error from mlx5e_xmit(). -- WBR, Andrey V. Elsukov
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