GitHub - LaurieWired/tailslayer: Library for reducing tail latency in RAM reads

Tailslayer is a C++ library that reduces tail latency in RAM reads caused by DRAM refresh stalls. It works by replicating data across multiple independent DRAM channels with uncorrelated refresh schedules, using undocumented channel scrambling offsets compatible with AMD, Intel, and Graviton processors. When a read request arrives, it issues hedged reads across all replicas and uses whichever responds first. The library exposes a template-based HedgedReader API where users provide a signal function (to determine when to read) and a work function (to process the result). It handles address calculation and core pinning internally, acting as a hedged vector with logical indices.