Network Intelligence Research Center (NIRC)

Sep 10, 2025 · Fundamentals

Understanding RDMA: How QP, WQE, and Doorbell Power High‑Performance Communication

The article explains RDMA's low‑latency, CPU‑bypass communication by detailing the roles of Queue Pairs, Work Queue Entries, and the Doorbell mechanism, comparing them with traditional TCP/IP and outlining their state machines, data structures, and notification workflow.