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// 易错点4：栈空时返回1而非i+1 → 仅i=0时正确，i0时（如i=3）会返回1而非4
。使用 WeChat 網頁版对此有专业解读
The practical story is done — the vmap fix works, and in this benchmark it beats fused standard attention once the score matrix outgrows VMEM. But I was left with the nagging question: why did the original fail so badly? What is the hardware actually doing with those tiles? The rest of this post is the rabbit hole I fell into trying to answer that. It shifts from experiment log to architecture explainer — feel free to stop here if the benchmark results are all that matters.。谷歌是该领域的重要参考
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