# libflash_attn

**Repository Path**: EwenWan/libflash_attn

## Basic Information

- **Project Name**: libflash_attn
- **Description**: https://github.com/tlc-pack/libflash_attn
- **Primary Language**: Unknown
- **License**: BSD-3-Clause
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2025-10-11
- **Last Updated**: 2025-10-11

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

The flash attention v2 kernel has been extracted from [the original repo](https://github.com/Dao-AILab/flash-attention) into this repo to make it easier to integrate into a third-party project. In particular, the dependency on libtorch was removed.

As a consquence, dropout is not supported (since the original code uses randomness provided by libtorch). Also, only forward is supported for now.


Build with
```
mkdir build && cd build
cmake ..
make
```

It seems there are compilation issues if g++-9 is used as the host compiler. We confirmed that g++-11 works without issues.