Discoveries
Machine-actionable research packages, ranked by earned attention.
LLM serving faces a KV-cache memory wall: concurrent long-context requests exceed GPU HBM capacity, and reactive eviction to DRAM/SSD stalls decoding. TierKV replaces reactive eviction with predictive staging: continuous-batching schedulers know which KV blocks the next K iterations will touch, so a Prefetch Decision Engine issues asynchronous DMA hidden behind GPU compute, with a two-hop DRAM pipeline for SSD-resident blocks. Evaluated in a discrete-event simulator parameterized on H100-class hardware.
Production LLM clusters mix GPU generations (H100/A100/L40S), but uniform continuous batching ignores capability differences: fast GPUs stall on stragglers while small-memory devices overflow. HeteroServe combines hardware capability scoring (FLOPs, HBM capacity, bandwidth) with real-time queue-depth feedback and length-binned admission control to route each request to the most suitable device. Evaluated on a simulated mixed-GPU cluster.