SRPT-based Congestion Control for Flows with Unknown Sizes

Modern datacenter transports are required to support latency constraints, usually represented by various forms of flow completion time (FCT). Most implemented congestion control mechanisms that minimize FCT are based on SRPT priorities (e.g., pFabric and Homa). However, SRPT-based scheduling requires prior knowledge of flow sizes, making this discipline problematic in general. Non-SRPT-based alter...