1torch was not compiled with flash attention reddit As it stands, the ONLY way to avoid getting spammed with UserWarning: 1Torch was not compiled with flash attention. 0. ) attn_output = scaled_dot_product_attention(q, k, v, attn_mask, dropout_p, is_causal) 代码可以工作，但我猜它并没有那么快，因为没有 FA。 Aug 22, 2024 · I’m experiencing this as well (using a 4090 and up-to-date ComfyUI), and there are some more Reddit users discussing this here. I'd be confused, too (and might yet be, didn't update Ooba for a while--now I'm afraid to do it). I get a CUDA… Welcome to the unofficial ComfyUI subreddit. /r/StableDiffusion is back open after the protest of Reddit killing open API access, which will bankrupt app developers, hamper moderation, and exclude blind users from the site. EDIT2: Ok, not solely an MPS issue since K-Sampler starts as slow with --cpu as with MPS; so perhaps more of an fp32 related issue then. SDPBackend. I don't think so, maybe if you have some ancient GPU but in that case you wouldn't benefit from Flash Attention anyway. I can't even use it without xformers anymore without getting torch. compile. My issue seems to be the "AnimateDiffSampler" node. py:697: UserWarning: 1Torch was not compiled with flash attention. Please share your tips, tricks, and workflows for using this software to create your AI art. I'm trying to use WSL to enable docker desktop to use CUDA for my NVIDIA graphics card. To resolve these issues, you should reinstall the libraries with GPU support enabled. ) attn_output = torch. 0 cross attention function. i don't know of any other papers that explore this topic. 6, pytorch-triton-roc We would like to show you a description here but the site won’t allow us. (Triggered internally at C:\actions-runner\_work\pytorch\pytorch\builder\windows\pytorch\aten\src\ATen\native\transformers\cuda\sdp_utils. Use the sub-quadratic cross attention optimization. sdpa_kernel(torch. is to manually uninstall the Torch that Comfy depends on and then do: Flash Attention for some reason is just straight up not present in any version above 2. I've been trying to get flash attention to work with kobold before the upgrade for at least 6 months because I knew it would really improve my experience. Mar 15, 2024 · You just have to manually reinstall specifically 2. I'd just install flash attention first then do xformers. py:5504: UserWarning: 1Torch was not compiled with flash attention. arXiv:2112. Hopefully someone can help who knows more about this :). So I don't really mind using Windows other than the annoying warning message. Running in unraid docker container (atinoda/text-generation-webui) and startup logs seem fine after running the pip upgrade for tts version apparently being out of date: 1Torch was not compiled with flash attention skier233/nsfw_ai_model_server#7. FLASH_ATTENTION): and still got the same warning. Nov 3, 2024 · I installed the latest version of pytorch and confirmed installation 2. Feb 9, 2024 · ComfyUI Revision: 1965 [f44225f] | Released on '2024-02-09' Just a got a new Win 11 box so installed CUI on a completely unadultered machine. I pip installed it the long way and it's in so far as I can tell. Official subreddit for oobabooga/text-generation-webui, a Gradio web UI for Large Language Models. (Triggered internally at . ) I tried changing torch versions from cu124 to cu121, to older 2. py:407: UserWarning: 1Torch was not compiled with flash attention. Aug 8, 2024 · C:\Users\Grayscale\Documents\ComfyUI\ComfyUI_windows_portable\ComfyUI\comfy\ldm\modules\attention. Feb 4, 2025 · Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. cuda. compile disabled flashattention Flash Attention is not implemented in AUTOMATIC1111's fork yet (they have an issue open for that), so it's not that. py:633: UserWarning: 1T Welcome to the unofficial ComfyUI subreddit. 1+cu121. cpp:455. scaled_dot_product_attention(Whisper did not predict an ending timestamp, which can happen if audio is cut off in the middle of a word. Disabled experimental graphic memory optimizations. --use-quad-cross-attention. OutOfMemory Aug 16, 2023 · Self-attention Does Not Need O(n^2) Memory. dev20231105+rocm5. 👍 5 mauzus, GiusTex, KitasanB1ack, hugo4711, and pspdada reacted with thumbs up emoji Should probably be part of the installation package. g. 1 version of Pytorch. (Triggered internally at C:\actions-runner_work\pytorch\pytorch\builder\windows\pytorch\aten\src\ATen\native\transformers\cuda\sdp_utils. Pretty disappointing to encounter Jan 21, 2025 · 当运行代码时，收到了一条警告信息：“UserWarning: 1Torch was not compiled with flash attention”。提示当前使用的 PyTorch 版本并没有编译进 Flash Attention 支持。查了很多资料，准备写个总结，详细解释什么是 Flash Attention、这个问题出现的原因、以及推荐的问题排查顺序。 1. 这个警告是由于torch=2. I wonder if flashattention is used under torch. Is there an option to make torch. cpp:263. There are NO 3rd party nodes installed yet. 3. 2 更新后需要启动 flash attention V2 作为最优机制，但是并没有启动成功导致的。 We would like to show you a description here but the site won’t allow us. 0018491744995117188 seconds Standard attention took 0. Hello, I'm currently working on running docker containers used for Machine Learning. 0” to “0. Flash attention took 0. We would like to show you a description here but the site won’t allow us. ) Nov 2, 2023 · Now that flash attention 2 is building correctly on windows again the xformers builds might include it already, I'm not entirely sure since it's a different module. unloading modules after use) being changed to be on by default (although I noticed that this speedup is temporary for me - in fact, SD is gradually and steadily getting slower the more For me, no. Don't know if it was something I did (but everything else works) or if I just have to wait for an update. Ignored when xformers is used. . Dec 11, 2024 · 2024 网络安全回顾与 2025 展望：守护数字世界的新征程 253 【卡车和无人机协同配送路径优化】遗传算法求解利用一辆卡车和两架无人机配合，将小包裹递送给随机分布的客户，以使所有站点都由卡车或无人机递送一次后返回起始位置（中转站）研究（Matlab代码实现） Mar 17, 2024 · I am using the latest 12. \aten\src\ATen\native Apr 4, 2023 · I tested the performance of torch. If fp16 works for you on Mac OS Ventura, please reply! I'd rather not update if there a chance to make fp16 work. Standard attention mechanism uses High Bandwidth Memory (HBM) to store, read and write keys, queries and values. ). and Nvidia’s Apex Attention implementations and yields a significant computation speed increase and memory usage decrease over a standard PyTorch implementation. At present using these gives below warning with latest nightlies (torch==2. Just installed CUDA 12. Personally, I didn't notice a single difference between Cuda versions except Exllamav2 errors when I accidentally installed 11. As it stands currently, you WILL be indefinitely spammed with UserWarning: 1Torch was not compiled with flash attention. cpp:555. 6876699924468994 seconds Notice the following 1- I am using float16 on cuda, because flash-attention supports float16 and bfloat16 Nov 5, 2023 · 🚀 The feature, motivation and pitch Enable support for Flash Attention Memory Efficient and SDPA kernels for AMD GPUs. Recently when generating a prompt a warning pops up saying that "1Torch was not compiled with flash attention" and "1Torch was not compiled with memory efficient attention". Get the Reddit app Scan this QR code to download the app now 1Torch was not compiled with flash attention. Please keep posted images SFW. \whisper\modeling_whisper. 9 and torch 2. Use the split cross attention optimization. To install the bitsandbytes library with GPU support, follow the installation instructions provided by the library's repository, making sure to install the version with CUDA support. FlashAttention-2 Tri Dao. 2+cu121, which is the last version where Flash Attention existed in any way on Windows. which shouldn't be that different . 首先告诉大家一个好消息，失败了通常不影响程序运行，就是慢点. 2023. FlashAttention-2: Faster Attention with Better Parallelism and Work Partitioning. This was after reinstalling Pytorch nightly (ROCm 5. compile on the bert-base model on the A100 machine, and found that the training performance has been greatly improved. 1+cu124, when I ran an image generation I got the following message: :\OmniGen\venv\lib\site-packages\transformers\models\phi3\modeling_phi3. in this paper, i believe they claim it is query-key dimension (d_dot), but i think it should depend on the number of heads too. attention. You can fix the problem by manually rolling back your Torch stuff to that version (even with an otherwise fully up to date Comfy installation this still works). Closed Copy link umarbutler commented Aug 19, 2024. . Warning: caught exception 'Torch not compiled with CUDA enabled', memory monitor disabled We would like to show you a description here but the site won’t allow us. 99” and back, etc. Launching Web UI with arguments: --opt-sub-quad-attention --disable-nan-check --precision full --no-half --opt-split-attention Thank you for helping to bring diversity to the graphics card market. --use-pytorch-cross-attention. Flash Attention is an attention algorithm used to reduce this problem and scale transformer-based models more efficiently, enabling faster training and inference. When i queue prompt in comfyui i get this message in cmd: UserWarning: 1Torch was not compiled with flash attention how do i fix it? Jul 14, 2024 · I have tried running the ViT while trying to force FA using: with torch. Disable xformers. 4 with new Nvidia drivers v555 and pytorch nightly. 3 - didn't help. 6) cd Comfy We would like to show you a description here but the site won’t allow us. Saw some minor speedup on my 4090 but the biggest boost of which was on my 2080ti with a 30% speedup. com We would like to show you a description here but the site won’t allow us. I read somewhere that this might be due to the MPS backend not fully supporting fp16 on Ventura. 8 Cuda one time. \site-packages\torch\nn\functional. “1. EDIT: Comparing running 4-bit 70B models w/ multi-GPU @ 32K context, with flash attention in WSL vs no flash attention in Windows 10, there is <2GB difference in VRAM usage. Not even trying Deepspeed yet, just standard Alltalk. 2+cu121 on Windows. Welcome to the unofficial ComfyUI subreddit. r/SDtechsupport • A sudden decrees in the quality of generations. If anyone knows how to solve this, please just take a couple of minutes out of your time to tell me what to do. here is a comparison between 2 images i made using the exact same parameters. For reference, I'm using Windows 11 with Python 3. I can't seem to get flash attention working on my H100 deployment. Use the new pytorch 2. Update: It ran again correctly after recompilation. So whatever the developers did here I hope they keep it. Known Workarounds (to help mitigate and debug the issue): Changing the LORA weight between every generation (e. 05682. functional. i just don't want people to be surprised if they fine tune to greater context lengths and things don't work as well as gpt4 We would like to show you a description here but the site won’t allow us. Apr 27, 2024 · It straight up doesn't work, period, because it's not there, because they're for some reason no longer compiling PyTorch with it on Windows. nn. the only difference is that i'm using xformers now. Mar 15, 2023 · I wrote the following toy snippet to eval flash-attention speed up. Coqui, Diffusion, and a couple others seem to work fine. This forum is awful. Warning : 1Torch was not compiled with flash attention. That said, when trying to fit a model exactly in 24GB or 48GB, that 2GB may make all the yea, literature is scant and all over the place in the efficient attention field. You are already very close to the answer, try remove --pre in command above and install again Apr 4, 2024 · UserWarning: 1Torch was not compiled with flash attention. 1. --disable-xformers. Had to recompile flash attention and everything works great. Most likely, it's the split-attention (i. Feb 6, 2024 · AssertionError: Torch not compiled with CUDA enabled. 11. library and the PyTorch library were not compiled with GPU support. 4. --gpu-only I had a look around on the WebUI / CMD window but could not see any mention of if it was using flash attention or not, I have flash attention installed with pip. It used to work and now it doesn't. The code outputs. Flash attention also compiled without any problems. 2. \aten\src\ATen\native\transformers\cuda\sdp_utils. Sep 26, 2024 · use the following search parameters to narrow your results: subreddit:subreddit find submissions in "subreddit" author:username find submissions by "username" site:example. --use-split-cross-attention. e. cqkyod rsxtc gyylzga btyqzafp psk cvar xjpny dflbkm oazf bmvxkmnzq kiwu usptme vtb vcwqed fpumw