SyncBN in AMP?
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- Python
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Description
How can I implement SycnBN with AMP? Should usign the following code in main_fp16_optimizer.py?
import apex
model = apex.parallel.convert_syncbn_model(model)
from apex.parallel import DistributedDataParallel as DDP
model = DDP(model, delay_allreduce=True)
If so, can the DDP be repalced with original DataParallel if I train net with only one computer?
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
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Research direction
Begin with main_fp16_optimizer.py and the shown apex.parallel.convert_syncbn_model and DistributedDataParallel usage. Verify whether AMP supports this SyncBN setup and whether single-computer training can use DataParallel; done would be a documented, unambiguous recommendation.
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Assessment
- Tech stack
- python
- Domain
- distributed-systems, machine-learning
- Issue type
- Documentation
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100