Mixed Precision Training
arXiv: 1710.03740
领域
TLDR(中文)
系统论证了混合精度训练 recipe:FP16 存储与计算、FP32 主权重与累加、动态损失缩放防止梯度下溢。吞吐接近翻倍且精度无损,是大模型训练的效率基石;后来 BF16 免去损失缩放成为 LLM 标配,FP8 又在此基础上把吞吐再翻一倍。
TLDR (English)
Systematically validates mixed precision training: FP16 storage and compute with FP32 master weights and accumulators plus dynamic loss scaling to prevent gradient underflow. Nearly doubles throughput without quality loss; BF16 later removes the need for loss scaling and becomes the LLM default, and FP8 doubles throughput again.
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