* memory efficient test

* implement efficient test

* merge

* Add document and docstring

* fix unit test

* add memory usage report

* add inference test

* fix E501 line too long (81 > 79 characters

* fix wrong config path

* fix num of augmentations (2) != num of image meta (1)

* Update test_inference.py

Co-authored-by: Jerry Jiarui XU <xvjiarui0826@gmail.com>

* Add runner_type option

* pre-commit

* Fix max_iters

* Add by_epoch to EvalHook

* Add test_eval_hook for epoch runner

* Remove runner-type arg from tools/train

* Add missing every_n_iters check for epoch mode

* Bump mmcv min version

* Use build_runner

* Use interval in tests

* Update test_eval_hook.py

* Use every_n_epochs instead of every_n_iters. Update DistEvalHook

* Add test_dist_eval_hook_epoch

* Fix tests

* Add DeprecationWarning

* Update docs

* Replace DeprecationWarning with UserWarning

* Add missing map_location

* Add docstring

* Update mmseg/apis/inference.py

Co-authored-by: Jerry Jiarui XU <xvjiarui0826@gmail.com>

* Update inference.py

* Update inference.py

Co-authored-by: Jerry Jiarui XU <xvjiarui0826@gmail.com>