Does this support pytoch multiple workers? 

I' m using --multiprocess or --include-children to profile my PyTorch code, which is multiprocess with dataloader num_workers=4. But I got nothing in my log file. Any suggestions about this? 

```
    @profile(stream=open("mem_profile_dataset.log", "w+"))
    def get_item(self, idx):
          return  xxx
```