Principles

Tokenization Basics BPE Algorithm GPT Tokenizers BPE Training Engineering

Model Architecture

Attention Mechanisms

Position Encoding

Position Encoding Basics RoPE Math Derivation RoPE Implementation Length Extrapolation

GPU Programming Basics

GPU Architecture Basics Tensor Layout Triton Basics: Vector Add

Flash Attention Principles From Naive to Auto-Tuning Block Pointers and Multi-Dim Support Causal Masking Optimization Grouped Query Attention Backward Pass

Hands-on Training

训练循环

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拆开 LightningCLI、PretrainModule、优化器和调度器

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Table of Contents

LightningCLI 是什么

Lightning 接管了什么

Validation step

WSD 学习率调度

常用覆盖参数