RDMA MemoryRegister Error

Question

Hi, I'm Network Engineer and developing RDMA in Windows 10 using mellanox connectX-3.
I'm developing in a slightly unusual environment, so I need to register about 500GB with this adapter using RegisterMemory among NDSPI interfaces.

There is a process of pinning the memory inputted to the Register Memory(mmProbeAndLockPages, mmsecureVirtualMemory).
However, by default on in Windows 10, it seems that the limit of this pinning cannot exceed 128GB
Is there a way to increase this threshold, or do RDMA without pinning memory?

Answer 1

Hello there,

Remote direct memory access (RDMA) operations require the pinning of physical memory. As a consequence, the kernel is not allowed to write memory into the swap space.

RDMA is a networking technology that provides high-throughput, low-latency communication that minimizes CPU usage.

https://learn.microsoft.com/en-us/windows-hardware/drivers/network/background-reading-on-rdma

Hope this resolves your Query !!

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