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Add TorchAO wrapper config to allow filter_fn for quantize_ #13264

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Merged
merged 8 commits into from
Aug 13, 2025

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abhinaykukkadapu
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@abhinaykukkadapu abhinaykukkadapu commented Aug 10, 2025

Changes:

  1. Support filter function in quantize_ function when using torchao quantize.
  2. Update unittests accordingly
  3. Use ComposableQuantizer if there are multiple quantizers and is of type torchao, for legacy quantizers use them directly with prepare_pt2e.
  4. Source transform modifies model inplace, so deep copy first to avoid modifying user provided model.

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abhinaykukkadapu commented Aug 10, 2025

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pytorch-bot bot commented Aug 10, 2025

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/13264

Note: Links to docs will display an error until the docs builds have been completed.

❌ 4 New Failures, 7 Pending, 1 Unrelated Failure

As of commit 482f3d6 with merge base 0e76a97 (image):

NEW FAILURES - The following jobs have failed:

BROKEN TRUNK - The following job failed but were present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

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@meta-cla meta-cla bot added the CLA Signed This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed. label Aug 10, 2025
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eager_quantized_model = source_transform_output.data["forward"]
output = session.run_method("forward", example_inputs[0])[0]
expected = eager_quantized_model(*example_inputs[0])
self.assertTrue(torch.allclose(output, expected, atol=atol))
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You might want to print more stats if this fails - see https://github.com/pytorch/executorch/blob/main/backends/test/harness/tester.py#L337

atol=1e-1,
)
self._compare_eager_quantized_model_outputs(
session, example_inputs, 1e-1
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@digantdesai digantdesai Aug 12, 2025

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atol? Why is this so high for two linears?

Suggested change
session, example_inputs, 1e-1
session, example_inputs, atol=1e-1

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@abhinaykukkadapu abhinaykukkadapu Aug 12, 2025

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Yeah, i think 1e-2 is working on my mac, will check if linux passes on CI. Nevertheless, i'm updating the tolerance tests similar to CoreML (let me know if there is any objection) to use sqnr to compare eager model vs lowered model output.

But use tolerance checks to compare post quantized model and lowered model.

raise ValueError("Mixed quantizer types are not supported")
if len(torch_ao_quantizers) > 1:
raise ValueError(
"Multiple quantizers of torch.ao.quantization.quantizer not supported"
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Doesn't torchao already detect this and give an error if mixing? I thought I added that

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May be the torchao version is different?

@metascroy
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Overall, looks good. Address comments before merging

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@abhinaykukkadapu abhinaykukkadapu merged commit 0a7cea8 into main Aug 13, 2025
97 of 104 checks passed
@abhinaykukkadapu abhinaykukkadapu deleted the gh/abhinaykukkadapu/4/head branch August 13, 2025 01:11
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3 participants