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PC Processors

hchechao2
Adept I

Solarflare X2522 latency problem on Ryzen 7950X

The smart NIC Xilinx Solarflare X2522-10G has strange behavior on 7950X linux platform.

Which I have never seen before with same nic on AMD 5950X linux platform.

the RX packets software timestamp minus hardware timestamp jumps above 6us even more(use efsink within onload driver), which is too high to represent PCIE latency.

I have tried :

1. switch to latest onload driver (8.0.2.51)

2. switch to latest RHEL9.0(kernel 5.14.0-70-13.1.0.3)

3. use ROG CROSSHAIR X670E HERO motherboard and update bios to newest version 1004

4. use G.SKILL memory which support EXPO

and above changes had no effect.

I want to seek some help from AMD because 7950X and the smart nic solarflare nic ( which is also part of AMD products now) shouldn't have such compatibility problem

1 Solution
hchechao2
Adept I

disable iommu can fix this

View solution in original post

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3 Replies

Any issues with xilinx https://www.xilinx.com/support.html

Ryzen 5 5600x, B550 aorus pro ac, Hyper 212 black, 2 x 16gb F4-3600c16dgtzn kit, NM790 2TB, Nitro+RX6900XT, RM850, Win.10 Pro., LC27G55T..
hchechao2
Adept I

PS:

It is not only with xilinx smart nic , the problem is the same when using other smart nic like mellanox/exablaze.

hchechao2
Adept I

disable iommu can fix this

0 Likes