FlashAttention-2是对原始FlashAttention算法的一系列改进,旨在优化在GPU上的计算性能。本文详细讨论了FlashAttention-2的算法、并行性以及工作分区策略。 算法 FlashAttention-2的关键优化点在于减少非矩阵乘法(matmul)的浮点运算,以充分利用GPU上的专用计算单元(如Nvidia GPU上的Tensor Cores),这些单元在处理matmul操作(尤...
\[\begin{align}e^{m(x^{(1)})-m(x)}f(x^{(1)})&=e^{m(x^{(1)})-m(x)}[e^{x^{(1)}_1-m(x^{(1)})},...,e^{x^{(1)}_B-m(x^{(1)})}] \notag \\ &=[e^{x^{(1)}_1-m(x)},...,e^{x^{(1)}_B-m(x)}] \end{align}\] 3. FlashAttention算法流...
通过选择 DataCollatorWithFlattening ，Hugging Face Trainer 的用户现在可以无缝地将序列连接成一个单一的张量，同时在 Flash Attention 2 计算过程中考虑到序列边界。这是通过 flash_attn_varlen_func 实现的，它计算每个小批量的累积序列长度 ( cu_seqlens )。同样的功能也适用于 TRL 库中的 Hugging Face SFT...
1.AttentionAttention是Transformer的核心部分,Attention机制帮助模型进行信息筛选,通过Q,K,V,对信息进行加工1.1 attention计算公式1.2 attention计算流程1.3 Softmax attentionSelf-attention的Q,K,V同源,都是输入序列X的线性变化,在实际生产过程中K与V相同。F为token维度,DM为投影维 复杂度 矩阵乘法 分块 AIGC 【你...
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Hi, I'm on an EC2 instance and am trying to install flash-attn but keep running into an ssl error. Wondering if you know what's going on. I have openssl-1.1.1l installed. Here's the output: [ec2-user@ip-xxx-xx-xx-x ~]$ pip3.10 install fl...
FORCE_BUILD=os.getenv("FLASH_ATTENTION_FORCE_BUILD","FALSE")=="TRUE" SKIP_CUDA_BUILD=os.getenv("FLASH_ATTENTION_SKIP_CUDA_BUILD","FALSE")=="TRUE" # For CI, we want the option to build with C++11 ABI since the nvcr images use C++11 ABI ...
to enable not only control by the flash emitting device, but also what is called 'daylight synchronization' for controlling even the exposure of a background with stationary light automatically to a proper level, so a photographer perform high-level image representation without paying any attention....
In the preceding work using the original version of the Multi-Color-PAM fluorimeter, measurements of F > 700 and F < 710 were carried out alternatingly, using the same detector and changing the detector filters. In this case, particular attention had to be paid to assuring that ...
The experiment was designed to test the temporal integration model of moving object visual position determination as well as the attention-capturing effect of the flash. Research in both areas is reviewed below. 1.1. Temporal integration Temporal integration (Morgan & Watt, 1983) is the main ...