[bug] Fix Pytorch profiler with emit_nvtx

[tchaton]

What does this PR do?

This PR resolve a bug with PyTorch Profiler and emit_nvtx.

nvprof --profile-from-start off -o trace_name.prof -- pytest tests/trainer/test_trainer.py::test_pytorch_profiler_nested_emit_nvtx

python -c "import torch;print(torch.autograd.profiler.load_nvprof('/home/ubuntu/pytorch-lightning/trace_name.prof'))"

Fixes #6153

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[codecov]

Codecov Report

Merging #6260 (1f0365c) into master (b6aa350) will decrease coverage by 2%.
The diff coverage is 62%.

@@           Coverage Diff           @@
##           master   #6260    +/-   ##
=======================================
- Coverage      93%     91%    -2%     
=======================================
  Files         161     161            
  Lines       11457   11463     +6     
=======================================
- Hits        10692   10485   -207     
- Misses        765     978   +213     

[pep8speaks]

Hello @tchaton! Thanks for updating this PR.

There are currently no PEP 8 issues detected in this Pull Request. Cheers! 🍻

Comment last updated at 2021-03-05 16:14:44 UTC