Max. RX Ring Size Allowed for E810-XXVDA2

[OttoChow]

In the release note of ICE driver, it says:

Rx Descriptor Ring Size
-----------------------
To reduce the number of Rx packet discards, increase the number of Rx
descriptors for each Rx ring using ethtool.

- Check if the interface is dropping Rx packets due to buffers being full
(rx_dropped.nic can mean that there is no PCIe bandwidth):

# ethtool -S <ethX> | grep "rx_dropped"

- If the previous command shows drops on queues, it may help to increase
the number of descriptors using 'ethtool -G':

# ethtool -G <ethX> rx <N>
Where <N> is the desired number of ring entries/descriptors

This can provide temporary buffering for issues that create latency while
the CPUs process descriptors.

===============================================================

Q1. May I know what is the default size of the RX Ring？

Q2. What is the maximum value I am allowed to set?

Q3. May I see RX Ring the same thing as RX Buffer?

Thank you.

Otto

[Zigfreid_Intel]

Hello OttoChow,

Thank you for posting on Intel Ethernet Communities. 

We would like check first if you are using a discreet NIC or an embedded chipset for your E810-XXVDA2. If you are using a discreet NIC, please provide us a photo of the markings both front and back of the Network adapter so we can validate if you are using a retail or an OEM unit.

If you are using a chipset embedded on your mother board, please provide us the exact model of your mother board instead. 

Also can we ask why are you needing the RX Ring information so we can have a better understanding of your concern and might be able to provide you some alternative recommendations as well. 

If you have questions or other clarifications please let us know so we can help you further

Awaiting to hear from you soon, should there be no response from you, I’ll make sure to reach out after 3 business days. Thank you and have a nice day!

Best regards,

Zigfreid I.

Intel® Customer Support

[OttoChow]

No worry.  I have the answer already.  The max. value is 8160.  This value can be found out by "ethtool -g [interface]".

[Zigfreid_Intel]

Hello OttoChow,

Thank you very much for informing us, we are glad that you were able to find the answer for your concern. Please do advise us if you have other concerns or questions. If none, please advise us if we can close the thread. 

Hoping to hear from you soon.

Should there be no response from you, I’ll make sure to reach out after 3 business days

Best regards,

Zigfreid I.

Intel® Customer Support

[Zigfreid_Intel]

Hello OttoChow,

Good day! We hope that you are having a great one so far.

We'd like to know if you have any other questions or clarifications please let us know so we would know if we can close the thread.

Hoping to hear from you soon.

We will wait for your reply within 3 business days in case we don't hear from you, we will proceed closing this request.

Best regards,

Zigfreid I.

Intel® Customer Support

[Zigfreid_Intel]

Hello OttoChow,

Good day! We hope that you are having a great one so far.

Please be informed that we will now close this request since we haven't received any response from our previous follow ups. Just feel free to post a new question if you have any other inquiry in the future as this thread will no longer be monitored.

Best regards,

Zigfreid I.

Intel® Customer Support