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Graph-capturable single-kernel all-reduce with barrier-compute-barrier semantics for vLLM integration. 1D layout, unmasked fast path, capped at 16 CTAs with BLOCK_SIZE=2048 for small-message optimization. Co-Authored-By: Claude Opus 4 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4 <noreply@anthropic.com>
The per-block barrier variant (formerly one_shot_vllm) is the canonical one_shot implementation going forward. The old one_shot that required host-side zero+barrier is preserved as one_shot_legacy. Co-Authored-By: Claude Opus 4 <noreply@anthropic.com>
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Co-Authored-By: Claude Opus 4 <noreply@anthropic.com>
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