Posts by Haocong Wang
From Theory to Kernel: Implement FlashAttention-v2 with CK-Tile
- 21 May 2025
In our previous blog, Hands on with CK Tile we walked through how to build a basic GEMM kernel using CK-Tile. In this blog, we will further explore the implementation of a fused kernel, specifically introducing the FlashAttention (FA)-v2 forward kernel. Figure 1 provides an overview of the FlashAttention kernel executions and data movements that occur during the computation of a single thread block of output matrix. Each of the subsequent sections explains details on how to implement this using CK-Tile.