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libmlx5: Report Multi-Packet RQ capabilities through mlx5 direct verbs
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Authored by vag.singh_oneconvergence.com on Sep 28 2021, 2:13 PM.
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Details

Reviewers
kib
hselasky
Summary

[PATCH 26/31] FreeBSD OFED support for DPDK MLX5 PMD

A Multi-Packet RQ is a receive queue where multiple packets are
written to the same WQE. Each message starts in the beginning of a
stride. The total size of the scatter elements of each WQE is
determined upon RQ creation and all the posted WQEs should meet the
determined size.

A Multi-Packet RQ reduces the number of needed post-recv operations
thus increasing performance.

It reduces memory footprint by allowing each packet to consume a
different number of strides instead of the whole WR.

Test Plan

Tested on KVM, ESXi, and HyperV/Azure Hypervisors with FreeBSD 14.0-CURRENT and FreeBSD12.1-STABLE.

iperf
DPDK MLX5 PMD/testpmd

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