Implement RDMA congestion control on Bluefield2

Infrastructure & Networking BlueField
1

Can I implement RDMA congestion control（like DCQCN or HPCC) on DPU? If yes, how can I do it

2

Hi @czq2,

Our firmware/HW implemented this algorithm, so you don’t need to implement it. We have config parameters in the firmware, but we don’t recommend to change them. This should work in default configuration.

Regards,
Chen

4

thanks you @chenh1
I want to kown does the DPU support programmable congestion control? Can I implement my own cc algorithm on bluefiled2?

Best Wishes

5

Hi @czq2,

Basically, it can be done in the application level. It is possible to develop applications that implement congestion control (but if other application that doesn’t support CC runs in parallel, this can cause CC to not work).

Regards,
Chen

6

Thanks again @chenh1
Can the DPU support PCC like the CX6 NIC? I checked the firmware information of the DPU and found a similar information of cx6 allow user cc
Best Regards

7

Hi @czq2 - yes

Regards,
Chen

8

@chenh1 Thank you for taking the time answer all my questions , and wish you a wonderful day！

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