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README.md

Intro

This readme will have a subsection for every example *.py file.

Please follow the instructions in README.md to install torchax, then install requirements for all of the examples with

pip install -r requirements.txt

basic_training.py

This file constructed by first copy & paste code fragments from this pytorch training tutorial: https://pytorch.org/tutorials/beginner/introyt/trainingyt.html

Then adding few lines of code that serves the purpose of moving torch.Tensor into XLA devices.

Example:

state_dict = pytree.tree_map_only(torch.Tensor,
    torchax.tensor.move_to_device, state_dict)

This fragment moves the state_dict to XLA devices; then the state_dict is passed back to model via load_state_dict.

Then, you can train the model. This shows what is minimum to train a model on XLA devices. The perf is not as good because we didn't use jax.jit, this is intentional as it is meant to showcase the minimum code change.

Example run:

(xla2) hanq-macbookpro:examples hanq$ python basic_training.py
Training set has 60000 instances
Validation set has 10000 instances
Bag  Dress  Sneaker  T-shirt/top
tensor([[0.8820, 0.3807, 0.3010, 0.9266, 0.7253, 0.9265, 0.0688, 0.4567, 0.7035,
         0.2279],
        [0.3253, 0.1558, 0.1274, 0.2776, 0.2590, 0.4169, 0.1881, 0.7423, 0.4561,
         0.5985],
        [0.5067, 0.4514, 0.9758, 0.6088, 0.7438, 0.6811, 0.9609, 0.3572, 0.4504,
         0.8738],
        [0.1850, 0.1217, 0.8551, 0.2120, 0.9902, 0.7623, 0.1658, 0.6980, 0.3086,
         0.5709]])
tensor([1, 5, 3, 7])
Total loss for this batch: 2.325265645980835
EPOCH 1:
  batch 1000 loss: 1.041275198560208
  batch 2000 loss: 0.6450189483696595
  batch 3000 loss: 0.5793989677671343
  batch 4000 loss: 0.5170258888280951
  batch 5000 loss: 0.4920090722264722
  batch 6000 loss: 0.48910293977567926
  batch 7000 loss: 0.48058812761632724
  batch 8000 loss: 0.47159107415075413
  batch 9000 loss: 0.4712311488997657
  batch 10000 loss: 0.4675815168160479
  batch 11000 loss: 0.43210567891132085
  batch 12000 loss: 0.445208148030797
  batch 13000 loss: 0.4119230824254337
  batch 14000 loss: 0.4190662656680215
  batch 15000 loss: 0.4094535468676477
LOSS train 0.4094535468676477 valid XLA

basic_training_jax.py

This file constructed by first copy & paste code fragments from this pytorch training tutorial: https://pytorch.org/tutorials/beginner/introyt/trainingyt.html

Then replacing torch optimizer with optax optimizer; and use jax.grad for gradient instead of torch.Tensor.backward().

Then, you can train the model using jax ecosystem's training loop. This is meant to showcase how easy is to integrate with Jax.

Example run:

(xla2) hanq-macbookpro:examples hanq$ python basic_training_jax.py
Training set has 60000 instances
Validation set has 10000 instances
Pullover  Ankle Boot  Pullover  Ankle Boot
tensor([[0.5279, 0.8340, 0.3131, 0.8608, 0.3668, 0.6192, 0.7453, 0.3261, 0.8872,
         0.1854],
        [0.7414, 0.8309, 0.8127, 0.8866, 0.2475, 0.2664, 0.0327, 0.6918, 0.6010,
         0.2766],
        [0.3304, 0.9135, 0.2762, 0.6737, 0.0480, 0.6150, 0.5610, 0.5804, 0.9607,
         0.6450],
        [0.9464, 0.9439, 0.3122, 0.1814, 0.1194, 0.5012, 0.2058, 0.1170, 0.7377,
         0.7453]])
tensor([1, 5, 3, 7])
Total loss for this batch: 2.4054245948791504
EPOCH 1:
  batch 1000 loss: 1.0705260595591972
  batch 2000 loss: 1.0997755021179327
  batch 3000 loss: 1.0186579653513108
  batch 4000 loss: 0.9090727646966116
  batch 5000 loss: 0.8309370622411024
  batch 6000 loss: 0.8702225417760783
  batch 7000 loss: 0.8750176187023462
  batch 8000 loss: 0.9652624803795453
  batch 9000 loss: 0.8688667197711766
  batch 10000 loss: 0.8021814124770199
  batch 11000 loss: 0.8000540231048071
  batch 12000 loss: 0.9150884484921057
  batch 13000 loss: 0.819690621060171
  batch 14000 loss: 0.8569030471532278
  batch 15000 loss: 0.8740896808278603
LOSS train 0.8740896808278603 valid 2.3132264614105225