Comments (6)
๐ Hello @ASharpSword, thank you for your interest in YOLOv5 ๐! Please visit our โญ๏ธ Tutorials to get started, where you can find quickstart guides for simple tasks like Custom Data Training all the way to advanced concepts like Hyperparameter Evolution.
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Requirements
Python>=3.8.0 with all requirements.txt installed including PyTorch>=1.8. To get started:
git clone https://github.com/ultralytics/yolov5 # clone
cd yolov5
pip install -r requirements.txt # install
Environments
YOLOv5 may be run in any of the following up-to-date verified environments (with all dependencies including CUDA/CUDNN, Python and PyTorch preinstalled):
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- Google Cloud Deep Learning VM. See GCP Quickstart Guide
- Amazon Deep Learning AMI. See AWS Quickstart Guide
- Docker Image. See Docker Quickstart Guide
Status
If this badge is green, all YOLOv5 GitHub Actions Continuous Integration (CI) tests are currently passing. CI tests verify correct operation of YOLOv5 training, validation, inference, export and benchmarks on macOS, Windows, and Ubuntu every 24 hours and on every commit.
Introducing YOLOv8 ๐
We're excited to announce the launch of our latest state-of-the-art (SOTA) object detection model for 2023 - YOLOv8 ๐!
Designed to be fast, accurate, and easy to use, YOLOv8 is an ideal choice for a wide range of object detection, image segmentation and image classification tasks. With YOLOv8, you'll be able to quickly and accurately detect objects in real-time, streamline your workflows, and achieve new levels of accuracy in your projects.
Check out our YOLOv8 Docs for details and get started with:
pip install ultralytics
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I am trying to generate val_loader with the same parameters as train_loader and remove the restriction that only the master process can create val_loader. Next, I undid the constraint that validate.run() should only be run by the master process, and I removed the tqdm from validate.run() so that the TQDMS don't interfere with each other and print too much information. However, these measures lead me to get some scattered validation results instead of a complete validation set. I had to combine partial validation set results from different GPU processes to get a complete validator result, I don't know if there is anything wrong with this, if so, I ask the author to point it out.
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I think I already know what I need to do, a training set of n GPU processes is split equally, but only the progress of the master i.e. process 0 is displayed, disguised as the overall progress with pbar = tqdm(total=nb). I could also disguise the total progress with the partial validation of the 0 process using pbar = tqdm(total=nb), but I would have to rewrite the mAP calculation and other subsequent processes to make them work for multiple processes.
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I think I already know what I need to do, a training set of n GPU processes is split equally, but only the progress of the master i.e. process 0 is displayed, disguised as the overall progress with pbar = tqdm(total=nb). I could also disguise the total progress with the partial validation of the 0 process using pbar = tqdm(total=nb), but I would have to rewrite the mAP calculation and other subsequent processes to make them work for multiple processes.
from yolov5.
Hello,
Thank you for your detailed observations and for sharing your approach to addressing the validation phase's performance on multi-GPU setups. Your insights are valuable and show a deep understanding of the underlying processes.
Indeed, the validation phase in YOLOv5 currently runs on a single GPU, which can become a bottleneck, especially with large validation sets. Your idea of distributing the validation workload across multiple GPUs is a promising approach to mitigate this issue.
Here are a few points to consider and some suggestions to help you refine your implementation:
-
Distributed Validation: As you mentioned, splitting the validation set across multiple GPUs and aggregating the results is a viable solution. This approach requires careful handling of the results to ensure the final metrics (e.g., mAP) are correctly computed.
-
Synchronization: Ensure that all GPU processes synchronize their results before computing the final metrics. This can be achieved using
torch.distributed
utilities to gather results from all processes. -
Progress Bar: Using
tqdm
for progress indication can be tricky in a multi-process environment. One approach is to update the progress bar only from the master process, as you suggested. Alternatively, you can use a custom logging mechanism to aggregate progress updates from all processes. -
Code Example: Here's a basic outline of how you might structure the validation loop with distributed processing:
import torch import torch.distributed as dist from tqdm import tqdm def validate(model, dataloader, device): model.eval() results = [] with torch.no_grad(): for batch in tqdm(dataloader, desc="Validation", disable=dist.get_rank() != 0): inputs, targets = batch inputs = inputs.to(device) outputs = model(inputs) results.append((outputs, targets)) # Gather results from all processes all_results = [None] * dist.get_world_size() dist.all_gather_object(all_results, results) # Flatten the list of results all_results = [item for sublist in all_results for item in sublist] # Compute metrics (e.g., mAP) on the aggregated results metrics = compute_metrics(all_results) return metrics def compute_metrics(results): # Implement your metric computation logic here pass
-
Testing and Debugging: Ensure you test your implementation thoroughly to verify that the distributed validation produces consistent and accurate results. You might want to start with a smaller dataset to simplify debugging.
-
Community Contributions: If you achieve a robust solution, consider contributing it back to the YOLOv5 repository. The YOLO community would greatly benefit from improvements in multi-GPU validation performance.
For further details on multi-GPU training and validation, you can refer to the Multi-GPU Training Tutorial.
Thank you again for your contributions and for pushing the boundaries of what's possible with YOLOv5. If you have any more questions or need further assistance, feel free to ask!
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๐ Hello there! We wanted to give you a friendly reminder that this issue has not had any recent activity and may be closed soon, but don't worry - you can always reopen it if needed. If you still have any questions or concerns, please feel free to let us know how we can help.
For additional resources and information, please see the links below:
- Docs: https://docs.ultralytics.com
- HUB: https://hub.ultralytics.com
- Community: https://community.ultralytics.com
Feel free to inform us of any other issues you discover or feature requests that come to mind in the future. Pull Requests (PRs) are also always welcomed!
Thank you for your contributions to YOLO ๐ and Vision AI โญ
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