Tailslayer is a C++ library that reduces tail latency in RAM reads by replicating data across multiple DRAM channels with uncorrelated refresh schedules and using hedged reads. It works across AMD, Intel, and Graviton platforms by leveraging undocumented channel scrambling offsets. The approach allows requests to be completed by the fastest-responding replica, significantly improving worst-case latency.
Background
Tail latency in DRAM reads is a critical performance issue in high-throughput systems, often caused by refresh operations that stall memory access. Existing solutions typically focus on scheduling optimizations rather than data replication across channels.
- Source
- Lobsters
- Published
- Apr 9, 2026 at 01:11 AM
- Score
- 7.0 / 10