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Disable flashinfer autotune temporarily due to correctness issues #41524

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Merged
yewentao256 merged 2 commits into from
May 3, 2026
+6 −2
Merged

Disable flashinfer autotune temporarily due to correctness issues #41524

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01301bc
Disable flashinfer autotune by default
wzhao18 May 3, 2026
c10eadc
Merge branch 'main' into wzhao/disable-autotune
yewentao256 May 3, 2026
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8 changes: 6 additions & 2 deletions vllm/config/vllm.py
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Original file line number Diff line number Diff line change
Expand Up @@ -209,7 +209,9 @@ def enable_mla_dual_rms_norm_fusion(cfg: "VllmConfig") -> bool:
"use_inductor_graph_partition": False,
},
"kernel_config": {
"enable_flashinfer_autotune": True,
# Disabled for now due to correctness issues:
# https://github.com/flashinfer-ai/flashinfer/issues/3197
"enable_flashinfer_autotune": False,
},
}
OPTIMIZATION_LEVEL_02 = {
Expand All @@ -229,7 +231,9 @@ def enable_mla_dual_rms_norm_fusion(cfg: "VllmConfig") -> bool:
"use_inductor_graph_partition": False,
},
"kernel_config": {
"enable_flashinfer_autotune": True,
# Disabled for now due to correctness issues:
# https://github.com/flashinfer-ai/flashinfer/issues/3197
"enable_flashinfer_autotune": False,
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@gemini-code-assist gemini-code-assist Bot May 3, 2026

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high

The correctness issues with FlashInfer autotuning likely affect OPTIMIZATION_LEVEL_03 as well, especially since it is documented as being the same as OPTIMIZATION_LEVEL_02 (line 80). Leaving it enabled in O3 (line 256) while disabling it in O1 and O2 creates an inconsistency that could lead to incorrect results for users selecting the O3 level. Please consider disabling it for O3 as well.

},
}
OPTIMIZATION_LEVEL_03 = {
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