Reproduce results are so bad although I have used all default parameter for all datasets.

[faize5]

My Training command are:
For Market1501:
python train.py -s market1501 -t market1501
For DukeMTMC-reid:
python train.py -s dukemtmc-reid -t dukemtmc-reid
Same or MSMT17 and Pride450s
Secondly, Why the results of Pride450s are so bad would you please help me out to understand it.