Peize Sun comments

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                                            Peize Sun

issues about Mix-Precision training

Hi~ Does reducing learning rate help?

When set num_heads = 1, doesnt train

Hi~ Do you change any other codes?

When set num_heads = 1, doesnt train

when you set num_heads=6, is the final performance the same as our reported performance?

When set num_heads = 1, doesnt train

Do you train on 8GPUs?

When set num_heads = 1, doesnt train

I guess only 1 gpu is the reason for 1 head not working. The first head of proposal box and features is not dependent on input image, later heads are...

When set num_heads = 1, doesnt train

Maybe reducing learning rate could help.

after trained about 7000 iters.it has error.

Hi~ I guess you are not running the experiments on COCO dataset, am I right? Have you fixed this bug?

how to use plot function?

Hi~ The plot_utils.py is following [DETR repo](https://github.com/facebookresearch/detr/tree/master/util). It can't be used to plot logs.

'assert (boxes1[:, 2:] >= boxes1[:, :2]).all()' happened when training

Hi~ Can you try to delete giou, including matching and loss, to see whether this error still occurs?

'assert (boxes1[:, 2:] >= boxes1[:, :2]).all()' happened when training

Can you print out cost_matrix to see which entry is invalid?