Virtual Head Attention
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- Virtual Head Attention targets long-context LLM efficiency
The r/LocalLLaMA post introduces Virtual Head Attention (VHA), an attention method using Q Premix and Linear Postmix to address tradeoffs among KV-cache size, compute, and quality. The authors report that VHA can be folded into a standard GQA-2 architecture for inference, beat a GQA baseline across four pretraining scales, reduce KV cache by 4× versus GQA-8 at dense scales and 2× versus GQA-4 at the MoE scale, and lower training and prefill FLOPs by 7.9% in a reported 1.7B, 4K-context run.
r/LocalLLaMA · 🔥 0
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