- tested single machine multiprocess on macos and ubuntu w/o GPU

• implemented some utilities mainly for pickling test cases for multiprocessing. the decorator pattern could also be useful for unit tests with expected execution time #852

on windows CI there's an error for the distributed test OSError: [WinError 1455] The paging file is too small for this operation to complete. Error loading "C:\hostedtoolcache\windows\Python\3.8.6\x64\lib\site-packages\torch\lib\caffe2_detectron_ops_gpu.dll" or one of its dependencies. I think this is a limitation of the CI instance rather than a code issue. so I skip the tests on windows

updates:

• fixed windows issue with 3rd party github action al-cheb/[email protected]
• tested single machine multiprocess on macos/ubuntu/windows w/o GPU

/integration-test

Let's use spawn for now, good enough for the first version, maybe some expert can help update it later.

Thanks.

sure thanks! this also needs to be extended to multi-node test cases