44 lines
1.4 KiB
Python
44 lines
1.4 KiB
Python
# SPDX-License-Identifier: Apache-2.0
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# SPDX-FileCopyrightText: Copyright contributors to the vLLM-Omni project
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import pytest
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import torch
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from torch import nn
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from vllm.model_executor.models.utils import WeightsMapper
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from vllm_omni.model_executor.models.weight_loader import AutoWeightsLoader
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pytestmark = [pytest.mark.core_model, pytest.mark.cpu]
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class _TinyModel(nn.Module):
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def __init__(self) -> None:
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super().__init__()
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self.kept = nn.Linear(1, 1, bias=False)
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self.skipped = nn.Linear(1, 1, bias=False)
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self.rotary_embed = nn.Module()
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self.rotary_embed.register_parameter("inv_freq", nn.Parameter(torch.zeros(1)))
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def test_auto_weights_loader_preserves_removed_skip_arguments() -> None:
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model = _TinyModel()
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model.skipped.weight.data.zero_()
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loaded = AutoWeightsLoader(
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model,
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skip_prefixes=["skipped."],
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skip_substrs=["rotary_embed.inv_freq"],
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).load_weights(
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[
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("checkpoint.kept.weight", torch.ones(1, 1)),
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("skipped.weight", torch.full((1, 1), 2.0)),
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("rotary_embed.inv_freq", torch.ones(1)),
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],
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mapper=WeightsMapper(orig_to_new_prefix={"checkpoint.": ""}),
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)
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assert loaded == {"kept.weight"}
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torch.testing.assert_close(model.kept.weight, torch.ones(1, 1))
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torch.testing.assert_close(model.skipped.weight, torch.zeros(1, 1))
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torch.testing.assert_close(model.rotary_embed.inv_freq, torch.zeros(1))
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