About milestones computation in ViTDet

Hello, thank ViTDet authors for their excellent research. I am confused with the milestones in ViTDet configs:

https://github.com/facebookresearch/detectron2/blob/224cd2318fdb45b5e22bbb861ee9711ee52c8b75/projects/ViTDet/configs/COCO/mask_rcnn_vitdet_b_100ep.py#L28

So sorry I cannot understand the meaning of these two numbers (e.g., which epoch should be). I note that here you have mentioned how to compute the total iterations:

https://github.com/facebookresearch/detectron2/blob/224cd2318fdb45b5e22bbb861ee9711ee52c8b75/projects/ViTDet/configs/COCO/mask_rcnn_vitdet_b_100ep.py#L22

But I still cannot figure out how you determine milestones=[163889, 177546]? Is it related to the ``drop_last`` param in dataloader?

Many thanks for your help ;)

The question points to projects/ViTDet/configs/COCO/mask_rcnn_vitdet_b_100ep.py, especially the total-iteration calculation near line 22 and milestones near line 28. Read those definitions first, then trace how the two milestone values relate to epochs and whether drop_last is involved. Done means providing a clear explanation in the issue of the values and their epoch relationship.

Written by the indexing model from the issue text.