derek.holloway
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49 lines
1.4 KiB
Python
49 lines
1.4 KiB
Python
"""Tests for perfxpert.tools.occupancy."""
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import pytest
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from perfxpert.tools import occupancy
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from perfxpert.tools._class import ToolClass
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def test_lookup_vgpr_32_gives_8_waves_on_cdna3():
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assert occupancy.lookup_waves_per_eu(32, "gfx942") == 8
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def test_lookup_vgpr_64_gives_8_waves_on_cdna3():
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assert occupancy.lookup_waves_per_eu(64, "gfx942") == 8
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def test_lookup_vgpr_128_gives_4_waves_on_cdna3():
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assert occupancy.lookup_waves_per_eu(128, "gfx942") == 4
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def test_lookup_vgpr_256_gives_2_waves_on_cdna3():
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assert occupancy.lookup_waves_per_eu(256, "gfx942") == 2
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def test_lookup_vgpr_128_gives_2_waves_on_cdna1():
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assert occupancy.lookup_waves_per_eu(128, "gfx908") == 2
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def test_lookup_unknown_arch_raises():
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with pytest.raises(KeyError):
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occupancy.lookup_waves_per_eu(32, "gfx9999")
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def test_suggest_reduction_for_hot_kernel_with_high_vgpr():
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r = occupancy.suggest_vgpr_reduction(current_vgpr=96, occupancy_pct=0.25, kernel_time_pct=0.50)
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assert r["applicable"]
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assert r["target_vgpr"] < 96
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assert r["expected_occupancy_multiplier"] > 1.0
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def test_suggest_skips_small_kernel():
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r = occupancy.suggest_vgpr_reduction(current_vgpr=96, occupancy_pct=0.25, kernel_time_pct=0.02)
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assert not r["applicable"]
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def test_is_read_only_class():
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assert occupancy.lookup_waves_per_eu.__tool_class__ == ToolClass.READ_ONLY
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assert occupancy.suggest_vgpr_reduction.__tool_class__ == ToolClass.READ_ONLY
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