I will admit that this is *very* easy to mess up as evidenced by the fact that examples in the official tutorials for Pytorch and other well known code-bases suffer from it. In the Pytorch training framework I've helped develop at work, we've implemented a custom `worker_init_fn` as outlined in [1] that is the default for all "trainer" instances who are responsible for instantiating DataLoaders in 99% of our training runs.
Also, as an aside, Holy Clickbaity title Batman! Maybe I should have blogged about this 2 years ago. Heck, every 6 months or so, I think that, and then I realize that I'd rather spend time with my kids and on my hobbies when I'm not working on interesting ML stuff and/or coding. An added side benefit is not having to worry about making idiotic clickbaity titles like this to farm karma, or provide high-quality unpaid labor for Medium in order for my efforts to be actually seen by people. But it could also just be that I'm lazy :-)
The solution I have in that issue adapts from the very helpful discussions in the original Pytorch issue [2]
`worker_init_fn=lambda id: np.random.seed(torch.initial_seed() // 2*32 + id)`
I will admit that this is *very* easy to mess up as evidenced by the fact that examples in the official tutorials for Pytorch and other well known code-bases suffer from it. In the Pytorch training framework I've helped develop at work, we've implemented a custom `worker_init_fn` as outlined in [1] that is the default for all "trainer" instances who are responsible for instantiating DataLoaders in 99% of our training runs.
Also, as an aside, Holy Clickbaity title Batman! Maybe I should have blogged about this 2 years ago. Heck, every 6 months or so, I think that, and then I realize that I'd rather spend time with my kids and on my hobbies when I'm not working on interesting ML stuff and/or coding. An added side benefit is not having to worry about making idiotic clickbaity titles like this to farm karma, or provide high-quality unpaid labor for Medium in order for my efforts to be actually seen by people. But it could also just be that I'm lazy :-)
[1] https://github.com/xingyizhou/CenterNet/issues/233
[2] https://github.com/pytorch/pytorch/issues/5059