Alibaba Cloud Developer
Alibaba Cloud Developer
Jan 15, 2026 · Artificial Intelligence

How Hierarchical Sparse Attention Breaks KVCache Limits for Ultra‑Long Context LLMs

This article explains how a hierarchical sparse‑attention framework redesigns KVCache storage across GPU, CPU, and remote memory, eliminates bandwidth and capacity bottlenecks, and enables efficient inference for 128K‑token and larger contexts with dramatically reduced GPU memory usage and higher throughput.

Dynamic Sparse AttentionGPU memory optimizationHierarchical Storage
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How Hierarchical Sparse Attention Breaks KVCache Limits for Ultra‑Long Context LLMs