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Fathom: Per-Query Read Depth for Sparse Decoding over Offloaded KV Caches

Kalyanarangan, Vivek
arXiv (All) · Papers
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and-cluster-computingcomputation-and-languagedistributedmachine-learningparallel
When agentic sessions run to a million tokens with many sessions resident at once, the KV cache and the index that ranks it live in host memory, and the scan that ranks all n keys for a top-k step becomes the traffic that bounds decoding. We present Fathom, a key scan in which each query decides how
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