[Enhancement] Set Num thread to 0 (#222)

* dumps to 0.5.0

* fix known issue

* fix bug

* set numThread to 0

Author: LeoXing1996

tools/train.py

@@ -4,6 +4,7 @@
 import os.path as osp
 import time
 
+import cv2
 import mmcv
 import torch
 from mmcv import Config, DictAction
@@ -16,6 +17,8 @@
 from mmgen.models import build_model
 from mmgen.utils import collect_env, get_root_logger
 
+cv2.setNumThreads(0)
+
 
 def parse_args():
     parser = argparse.ArgumentParser(description='Train a GAN model')