35 lines
1.3 KiB
Python
35 lines
1.3 KiB
Python
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import os
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import pytest
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from vllm.distributed.utils import get_pp_indices
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def test_custom_layer_partition():
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def _verify(partition_str, num_layers, pp_size, goldens):
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bak = os.environ.get("VLLM_PP_LAYER_PARTITION", None)
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os.environ["VLLM_PP_LAYER_PARTITION"] = partition_str
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for pp_rank, golden in enumerate(goldens):
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assert get_pp_indices(num_layers, pp_rank, pp_size) == golden
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if bak is not None:
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os.environ["VLLM_PP_LAYER_PARTITION"] = bak
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# Even partition
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_verify("5,5,5,5", 20, 4, [(0, 5), (5, 10), (10, 15), (15, 20)])
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# Balanced partition
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_verify("4,6,6,4", 20, 4, [(0, 4), (4, 10), (10, 16), (16, 20)])
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# Put reminder somewhere
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_verify("5,6,5,6", 22, 4, [(0, 5), (5, 11), (11, 16), (16, 22)])
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# Invalid partition strings
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with pytest.raises(ValueError):
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_verify("5,5,5,5,", 20, 4, [(0, 5), (5, 10), (10, 15), (15, 20)])
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with pytest.raises(ValueError):
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_verify("5,5,5,a", 20, 4, [(0, 5), (5, 10), (10, 15), (15, 20)])
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# Wrong number of partitions
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with pytest.raises(ValueError):
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_verify("5,5,5", 20, 4, [(0, 5), (5, 10), (10, 15), (15, 20)])
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# Wrong number of layers
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with pytest.raises(ValueError):
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_verify("5,5,5,5", 21, 4, [(0, 5), (5, 10), (10, 15), (15, 20)])
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