Gino Lu
d939c3b4fc
sparse_attn: split-launch dispatch + 3-mode PV-skip
- Per-head pv_threshold via head_remap LUT (CLI: -pv_threshold_per_head);
sentinel 1e30 routes to kEnablePVSkip=false bucket
- kEnablePVSkip bool → PVSkipMode enum {kNone, kPerWarp, kPerBlock};
new kPerBlock matches upstream sm80 (LDS vote, V loads unconditional).
CLI: -pv_mode={none,warp,block}, default warp
- README: PV-skip modes section + MI300X 3-curve sparsity chart
Co-Authored-By: Claude Opus 4 <noreply@anthropic.com>
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