Multi-Head Attention (MHA), Multi-Query Attention (MQA), Grouped Query Attention (GQA) Explained

In this video, we explore how the Multi-Head Attention (MHA), Multi-Query Attention (MQA) and Grouped-Query Attention (GQA) work, and what are the pros and cons in using each one of them.

References
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Self-Attention Mechanism Explained:    • Transformer Self-Attention Mechanism ...  
Attention Is All You Need paper: https://arxiv.org/abs/1706.03762
Fast Transformer Decoding: One Write-Head is All You Need paper: https://arxiv.org/abs/1911.02150
GQA: Training Generalized Multi-Query Transformer Models from
Multi-Head Checkpoints paper: https://arxiv.org/abs/2305.13245

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Contents
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00:00 - Intro
00:37 - Multi-Head Attention (MHA)
01:45 - Multi-Query Attention (MQA)
03:36 - Grouped-Query Attention (GQA)
05:04 - MHA vs MQA vs GQA
06:58 - Outro

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