On 13.12.2019 17:27, Hans Petter Selasky wrote: > On 2019-12-13 14:40, Andrey V. Elsukov wrote: >> 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(). >> > > Have you tried to tune the TX/RX parameters? > > Especially the tx_queue_size .
We use the following settings: % sysctl dev.mce.4.conf. | grep que dev.mce.4.conf.rx_queue_size: 16384 dev.mce.4.conf.tx_queue_size: 16384 dev.mce.4.conf.rx_queue_size_max: 16384 dev.mce.4.conf.tx_queue_size_max: 16384 Also, previously I have patched MLX5E_SQ_TX_QUEUE_SIZE value up to 16384. -- WBR, Andrey V. Elsukov
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