fix(nsa): tilelang sparse kernel hardcoded head offset + sm_120 smem-fit geometry - #70
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fix(nsa): tilelang sparse kernel hardcoded head offset + sm_120 smem-fit geometry#70architehc wants to merge 1 commit into
architehc wants to merge 1 commit into
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…plit sparse_attention_fwd_kernel_v1 hardcodes a *64 head offset that breaks any non-64 head split; fix to *H_per_block. Adds an sm_120 geometry (H_per_block=16, threads=128, v1/num_stages=1) that fits the 99KB smem budget, kv_dtype parametrization for fp8 KV pools, and drops the wg_wait kwarg removed in tilelang >= 0.1.9.
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With this, tilelang NSA prefill and decode run on sm_120 (validated with tilelang 0.1.12 + apache-tvm-ffi 0.1.11 + nvidia-cutlass-dsl 4.5.0, serving GLM-5.2 at 1M context).
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