how to change ring buffer to 4096

c_cloud

Hi,

how can I change ring buffer rx / tx from eg. default 512 to 4096 in dataplane ?

From the control plane via ethtool I can have no access to this devices ( because of DPDK ).

Thx

fractal_boy

@c_cloud this should make it

8200-test tnsr(config)# dataplane dpdk dev 0000:02:00.0 network num-rx-queues 4096 
Changes to dataplane startup settings require a dataplane restart to take effect.
8200-test tnsr(config)# dataplane dpdk dev 0000:02:00.0 network num-tx-queues 4096
Changes to dataplane startup settings require a dataplane restart to take effect.
8200-test tnsr(config)# serv datapl rest
8200-test tnsr(config)# wr

documentation for details

may I know your use case? why do you need to adjust the default settings?

c_cloud

@fractal_boy

Hi, ring buffer are note queues - afaik.

With your settings, I would set 4096 queues ;-) won't work.

use case is: I'm getting rx miss count rising.

Settings ring buffer should be e.g. ( as I found out )

dataplane dpdk dev 0000:02:00.0 network num-tx-desc 4096

fractal_boy

@c_cloud yep, I meant desc! I'm glad that worked for you.

fractal_boy

@c_cloud 4096 is a big number though... I recommend submitting a TAC case so the support team can help you adjust your system.

c_cloud

@fractal_boy

wrote a ticket to TAC. Let's see what they bring up.

c_cloud

this was their answer:

"If you get 3 Full Views, please check this guide: https://docs.netgate.com/tnsr/en/latest/dynamicrouting/bgp/tuning.html"

well... yes thank you.