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About this paper

Mattias Dürrmeier, Alberto Lerner

The authors profile single-user decoding in a repeated decoder block across two model families, three NVIDIA GPU generations, and contexts up to one million tokens. For Qwen3-8B, they report attention uses 21% of Blackwell’s bandwidth at long contexts, while Turing and Ada approach saturation. These are kernel measurements, not a full serving benchmark or demonstrated optimization.

Summary by alphaXiv.

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