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SageAttention3: Microscaling FP4 Attention for Inference and An Exploration of 8-Bit Training
- The efficiency of attention is crucial due to its quadratic time complexity.
- Enhancement of attention efficiency is achieved through leveraging the new FP4 Tensor Cores in Blackwell GPUs, resulting in 5x speedup over the fastest FlashAttention on RTX5090.
- Introduction of low-bit attention to training tasks, exploring its effectiveness in both forward and backward propagation.
- Experiments show that 8-bit attention achieves lossless performance in fine-tuning tasks but has slower convergence in pretraining tasks.
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