US Patent 11068412 RDMA transport with hardware integration

Techniques are disclosed for implementing direct memory access in a virtualized computing environment. A new mapping of interfaces between RNIC Consumer and RDMA Transport is defined, which enables efficient retry, a zombie detection mechanism, and identification and handling of invalid requests without bringing down the RDMA connection. Techniques are disclosed for out of order placement and delivery of ULP Requests without constraining the RNIC Consumer to the ordered networking behavior, if it is not required for the ULP (e.g., storage). This allows efficient deployment of an RDMA accelerated storage workload in a lossy network configuration, and reduction in latency jitter.