1torch was not compiled with flash attention reddit Hopefully someone can help who knows more about this :). --disable-xformers. I'm trying to use WSL to enable docker desktop to use CUDA for my NVIDIA graphics card. FlashAttention-2 Tri Dao. 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. . g. 1+cu121. ). cpp:555. 3 - didn't help. compile. My issue seems to be the "AnimateDiffSampler" node. I can't even use it without xformers anymore without getting torch. 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. 0” to “0. For reference, I'm using Windows 11 with Python 3. Not even trying Deepspeed yet, just standard Alltalk. Mar 15, 2023 · I wrote the following toy snippet to eval flash-attention speed up. 6, pytorch-triton-roc We would like to show you a description here but the site won’t allow us. 1+cu124, when I ran an image generation I got the following message: :\OmniGen\venv\lib\site-packages\transformers\models\phi3\modeling_phi3. Please keep posted images SFW. 0. This was after reinstalling Pytorch nightly (ROCm 5. Mar 15, 2024 · You just have to manually reinstall specifically 2. py:5504: UserWarning: 1Torch was not compiled with flash attention. \aten\src\ATen\native\transformers\cuda\sdp_utils. 0018491744995117188 seconds Standard attention took 0. The code outputs. I can't seem to get flash attention working on my H100 deployment. I get a CUDA… Welcome to the unofficial ComfyUI subreddit. Nov 3, 2024 · I installed the latest version of pytorch and confirmed installation 2. \site-packages\torch\nn\functional. e. 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. Warning : 1Torch was not compiled with flash attention. If fp16 works for you on Mac OS Ventura, please reply! I'd rather not update if there a chance to make fp16 work. compile on the bert-base model on the A100 machine, and found that the training performance has been greatly improved. functional. 6) cd Comfy We would like to show you a description here but the site won’t allow us. 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. Aug 8, 2024 · C:\Users\Grayscale\Documents\ComfyUI\ComfyUI_windows_portable\ComfyUI\comfy\ldm\modules\attention. com We would like to show you a description here but the site won’t allow us. 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. 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. /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. Official subreddit for oobabooga/text-generation-webui, a Gradio web UI for Large Language Models. 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. As it stands, the ONLY way to avoid getting spammed with UserWarning: 1Torch was not compiled with flash attention. Standard attention mechanism uses High Bandwidth Memory (HBM) to store, read and write keys, queries and values. I read somewhere that this might be due to the MPS backend not fully supporting fp16 on Ventura. Hello, I'm currently working on running docker containers used for Machine Learning. Use the sub-quadratic cross attention optimization. It used to work and now it doesn't. Don't know if it was something I did (but everything else works) or if I just have to wait for an update. I'd just install flash attention first then do xformers. 4 with new Nvidia drivers v555 and pytorch nightly. Ignored when xformers is used. 👍 5 mauzus, GiusTex, KitasanB1ack, hugo4711, and pspdada reacted with thumbs up emoji Should probably be part of the installation package. cuda. 05682. 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. Flash attention took 0. 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. 1. 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. If anyone knows how to solve this, please just take a couple of minutes out of your time to tell me what to do. 3. ) 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. Personally, I didn't notice a single difference between Cuda versions except Exllamav2 errors when I accidentally installed 11. 9 and torch 2. cpp:263. Coqui, Diffusion, and a couple others seem to work fine. r/SDtechsupport • A sudden decrees in the quality of generations. 2023. attention. 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. sdpa_kernel(torch. 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. 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. 2. I wonder if flashattention is used under torch. here is a comparison between 2 images i made using the exact same parameters. Is there an option to make torch. py:633: UserWarning: 1T Welcome to the unofficial ComfyUI subreddit. dev20231105+rocm5. Closed Copy link umarbutler commented Aug 19, 2024. Feb 6, 2024 · AssertionError: Torch not compiled with CUDA enabled. FlashAttention-2: Faster Attention with Better Parallelism and Work Partitioning. . 2+cu121 on Windows. --use-split-cross-attention. --use-pytorch-cross-attention. cpp:455. 99” and back, etc. Saw some minor speedup on my 4090 but the biggest boost of which was on my 2080ti with a 30% speedup. library and the PyTorch library were not compiled with GPU support. i don't know of any other papers that explore this topic. 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. --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. I'd be confused, too (and might yet be, didn't update Ooba for a while--now I'm afraid to do it). SDPBackend. Welcome to the unofficial ComfyUI subreddit. Just installed CUDA 12. \whisper\modeling_whisper. 8 Cuda one time. which shouldn't be that different . 2+cu121, which is the last version where Flash Attention existed in any way on Windows. 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). Most likely, it's the split-attention (i. ) attn_output = torch. py:697: UserWarning: 1Torch was not compiled with flash attention. 这个警告是由于torch=2. 11. 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. I don't think so, maybe if you have some ancient GPU but in that case you wouldn't benefit from Flash Attention anyway. Known Workarounds (to help mitigate and debug the issue): Changing the LORA weight between every generation (e. Use the split cross attention optimization. py:407: UserWarning: 1Torch was not compiled with flash attention. (Triggered internally at C:\actions-runner_work\pytorch\pytorch\builder\windows\pytorch\aten\src\ATen\native\transformers\cuda\sdp_utils. Disable xformers. the only difference is that i'm using xformers now. (Triggered internally at . At present using these gives below warning with latest nightlies (torch==2. Update: It ran again correctly after recompilation. \aten\src\ATen\native Apr 4, 2023 · I tested the performance of torch. 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. I pip installed it the long way and it's in so far as I can tell. 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. Disabled experimental graphic memory optimizations. Please share your tips, tricks, and workflows for using this software to create your AI art. --use-quad-cross-attention. 0 cross attention function. and Nvidia’s Apex Attention implementations and yields a significant computation speed increase and memory usage decrease over a standard PyTorch implementation. To resolve these issues, you should reinstall the libraries with GPU support enabled. ) I tried changing torch versions from cu124 to cu121, to older 2. Flash attention also compiled without any problems. This forum is awful. Get the Reddit app Scan this QR code to download the app now 1Torch was not compiled with flash attention. 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. 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. (Triggered internally at C:\actions-runner\_work\pytorch\pytorch\builder\windows\pytorch\aten\src\ATen\native\transformers\cuda\sdp_utils. OutOfMemory Aug 16, 2023 · Self-attention Does Not Need O(n^2) Memory. Had to recompile flash attention and everything works great. FLASH_ATTENTION): and still got the same warning. 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. nn. There are NO 3rd party nodes installed yet. ) 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. arXiv:2112. 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. 4. 1 version of Pytorch. So I don't really mind using Windows other than the annoying warning message. Use the new pytorch 2. As it stands currently, you WILL be indefinitely spammed with UserWarning: 1Torch was not compiled with flash attention. “1. We would like to show you a description here but the site won’t allow us. 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. 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. So whatever the developers did here I hope they keep it. 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". 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. smhitgm eobomii dmyjp jwykvu zuk hth aqzbt vdf zkvh vxzip druzj dbgiof wkbtotys qkovx mlybe