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A comment on Linux Code for “Device Memory TCP” – Network to/from Accelerator RAM. Parent comment

Re:Linux Code for “Device Memory TCP” – Network to/from Acce... by benlwalker on Sunday July 16, 2023 @01:06PM (#36749215)
RDMA is great and similar, but behaves very differently from TCP in the face of network congestion and longer distance traversals. This is essentially trying to get the best parts of TCP and the best parts of RDMA combined.
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Re:Linux Code for “Device Memory TCP” – Network to/from Acce... by buildbot on Sunday July 16, 2023 @01:18PM (#36749356)
Wouldn’t that be RoCE? Or iWarp?
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Re:Linux Code for “Device Memory TCP” – Network to/from Acce... by benlwalker on Sunday July 16, 2023 @01:35PM (#36749543)
iWARP maybe, but I don't think you want to offload all of TCP to hardware. You want to leave congestion control and all that to software. I don't entirely know if that's why iWARP isn't very popular, but I suspect that's the reason. You want a software TCP stack that can land the data where you want it directly.
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