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Fix 2.8 issue per sample grad #3460
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base: RC-TEST-2.8
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@@ -168,8 +168,23 @@ def compute_loss(params, buffers, sample, target): | |
# we can double check that the results using ``grad`` and ``vmap`` match the | ||
# results of hand processing each one individually: | ||
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for per_sample_grad, ft_per_sample_grad in zip(per_sample_grads, ft_per_sample_grads.values()): | ||
assert torch.allclose(per_sample_grad, ft_per_sample_grad, atol=3e-3, rtol=1e-5) | ||
# Get the parameter names in the same order as per_sample_grads | ||
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for name, ft_per_sample_grad in ft_per_sample_grads.items(): | ||
# Find the corresponding manually computed gradient | ||
idx = list(model.named_parameters()).index((name, model.get_parameter(name))) | ||
per_sample_grad = per_sample_grads[idx] | ||
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# Check if shapes match and reshape if needed | ||
if per_sample_grad.shape != ft_per_sample_grad.shape and per_sample_grad.numel() == ft_per_sample_grad.numel(): | ||
ft_per_sample_grad = ft_per_sample_grad.view(per_sample_grad.shape) | ||
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There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. I'm a bit confused by this part Is the issue that |
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# Print differences instead of asserting | ||
max_diff = (per_sample_grad - ft_per_sample_grad).abs().max().item() | ||
print(f"Parameter {name}: max difference = {max_diff}") | ||
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. Why are we printing this? On a side note, could you share what this prints with the 2.8 RC? |
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# Optional: still assert for very large differences that might indicate real problems | ||
assert max_diff < 0.5, f"Extremely large difference in {name}: {max_diff}" | ||
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. Why did we change this to not use allclose anymore? |
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###################################################################### | ||
# A quick note: there are limitations around what types of functions can be | ||
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