implementation detail · filed under inference & serving
Distributed shared memory for cross-SM attention data exchange
Using distributed shared memory within thread-block clusters to exchange attention data across SMs.
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used 1
Documented in
Evidence
1 span quoted from the sources, strongest treatment first.
the second kernel utilizes distributed shared memory within thread-block clusters, enabling high-speed data exchange across SMs
usedunclearin DeepSeek-V4DeepSeek
Filed alongside
Other methods under inference & serving :: inference kernel.
Batch-invariant deterministic kernelsCUDA GraphCUDA Graph capture size reductionFlashAttention 3Kernel fusionMoE-side chunkingSynchronization-free static-shape MoE executionTensorRT-LLM multi-head attention backendAvoiding split-KDeepGEMM-based batch-invariant matrix multiplicationDual-kernel batch-invariant attention decodingDynamic load balancingExp-free TopK kernelExpert-optimized Triton kernelsFA4 sheared-bias attention kernelFlashAttentionFlashAttention 4FlashKDAFP8 GEMMFused AttnRes merge and RMSNorm kernelFused latent down-projection and MoE-router GEMMFused mHC kernelsFused QSA kernelFused RoPE-attention-RoPE-cast kernel