| --- |
| license: bsd-3-clause |
| tags: |
| - wheels |
| - flash-attention |
| --- |
| |
| # Prebuilt wheels for the OPD environment |
|
|
| Mirror of official upstream release artifacts, re-hosted so machines with slow |
| GitHub access can pull them through `hf-mirror.com`. Nothing is rebuilt or |
| modified — byte-identical to the GitHub release assets. |
|
|
| ## `flash_attn-2.8.3+cu12torch2.9cxx11abiTRUE-cp312-cp312-linux_x86_64.whl` |
| |
| - Upstream: [Dao-AILab/flash-attention v2.8.3](https://github.com/Dao-AILab/flash-attention/releases/tag/v2.8.3) |
| - Size: 243 MiB |
| - `sha256: 4e2f9e39313266b1544b68138b15b91ee6221eccf14f7902b7c6620351340810` |
| - License: BSD-3-Clause (upstream) |
| |
| Matches exactly one environment. All four coordinates have to line up: |
| |
| | Coordinate | Value | Why it is fixed | |
| |---|---|---| |
| | torch | 2.9.0 | `vllm==0.12.0` pins `torch==2.9.0` (hard `==` in its metadata) | |
| | CUDA | cu12 | PyPI torch 2.9.0 is a cu128 build (`nvidia-*-cu12==12.8.x`) | |
| | cxx11abi | TRUE | the only variant published for torch2.9 | |
| | python | cp312 | the only variant published for torch2.9 — 3.10/3.11/3.13 do not exist | |
| | platform | linux_x86_64 | aarch64 exists upstream but is not mirrored here | |
| |
| **Requires compute capability >= 8.0** (Ampere or newer). FlashAttention-2 has no |
| kernels for sm70 (V100). Check with |
| `nvidia-smi --query-gpu=compute_cap --format=csv` before bothering. |
|
|
| Also note it is not needed for vLLM generation at all — verl's `flash_attn` |
| imports live under `verl/models/*/megatron/*`, which the generation path never |
| touches. It is only required once FSDP KL training starts. |
|
|
| ## Install |
|
|
| ```bash |
| HF_ENDPOINT=https://hf-mirror.com hf download HzChen20/opd-wheels \ |
| --repo-type dataset --include "*.whl" --local-dir ./wheels |
| |
| pip install ./wheels/flash_attn-2.8.3+cu12torch2.9cxx11abiTRUE-cp312-cp312-linux_x86_64.whl |
| python -c "import flash_attn; print(flash_attn.__version__)" |
| ``` |
|
|
| Verify the transfer first if the link is unreliable: |
|
|
| ```bash |
| sha256sum -c <<< "4e2f9e39313266b1544b68138b15b91ee6221eccf14f7902b7c6620351340810 ./wheels/flash_attn-2.8.3+cu12torch2.9cxx11abiTRUE-cp312-cp312-linux_x86_64.whl" |
| ``` |
|
|
