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Learn about a novel approach to RDMA customization through this 17-minute conference presentation from NSDI '25. Discover how researchers from the University of Washington and University of Wisconsin-Madison address the rigidity challenges in RDMA hardware-offloading by introducing White-Boxing RDMA methodology. Explore the Software-Controlled RDMA (SCR) framework that enables packet-granular software control over hardware transport while maintaining raw data path performance. Understand how SCR tackles high-speed line rate control challenges through effective control models, enhanced subsystem efficiency, and emerging hardware capabilities. Examine the implementation on Nvidia BlueField-3 with Datapath Accelerators and see demonstrations of new customizations including Multi-Tenant Fair Scheduler, User-Defined Congestion Control, Receiver-Driven Flow Control, and Multi-Path Routing Selection. Gain insights into SCR's practical applications for GPU-Direct and NVMe-oF RDMA scenarios without requiring modifications to existing machine learning or storage code.
