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how to understand GLV_RDPC and GLPRT_RDPC register in X710 datasheet?

wyf
Beginner
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In x710 datasheet, the description of the registers as followed:

  • GLPRT_RDPC (Port Receive Packets Discarded Count): Counts received packets from the network that are dropped in the receive packet buffer. The packets are dropped due to possible lack of bandwidth on the PCIe or total bandwidth of the internal data path.
  • GLV_RDPC (VSI Received Discard Packet Count): Counts (per VSI) packets that were dropped due to no descriptors in host queue. 

How to understand the behavior of the GLV_RDPC?  Whether the nic discard the packets in the fifo when the rx queue has no available descriptors, or the nic discard the packets on the line when the fifo is full due to no available descriptors in the rx queue?

 

What does the GLRPT_RDPC mean? Does the GLPRT_RDPC increase because the nic's fifo is full but there are still available descriptors in the rx queue? 

 

Does the receive packet buffer in the GLPRT_DPRC description refer to the nic's fifo buffer?

 

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Mike_Intel
Moderator
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Hello wyf,


Thank you for posting in Intel Ethernet Communities. 


For us to further check the issue, please provide the following details.


  1. Can you provide the link of the document that you are discussing?
  2. Are you designing a board/system with embedded X710 chip?
  3. Can you tell us more about your system and your end goal?


If you have questions, please let us know. In case we do not hear from you, we will make a follow up after 3 workings days. Thank you.


Best regards,

Michael L.

Intel® Customer Support 


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Mike_Intel
Moderator
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Hello wyf,

 

I hope you're having a wonderful day. I am just sending a soft follow up on the information that we requested for us to further assist you. We will wait for your reply.

 

If you have questions, please let us know. In case we do not hear from you, we will make a follow up after 3 workings days. Thank you.

 

Best regards,

Michael L.

Intel® Customer Support 


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Mike_Intel
Moderator
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Hello wyf,

 

I hope this message finds you well. I am just sending another follow up on the information that I requested. Since we have not heard back from you, I need to close this inquiry. 


If you need any additional information, please submit a new question as this thread will no longer be monitored.


Thank you and stay safe.

 

Best regards,

Michael L.

Intel® Customer Support 


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