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[BugFix][XPU] Fix speculative decoding on Intel XPU due to bug with IGC_ForceOCLSIMDWidth=16 #35298

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Merged
jikunshang merged 2 commits into from
Feb 26, 2026
Merged

[BugFix][XPU] Fix speculative decoding on Intel XPU due to bug with IGC_ForceOCLSIMDWidth=16 #35298

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da42967
Remove buggy environment variable setting for speculative decoding in…
ofirzaf Feb 25, 2026
03ad8de
Merge branch 'main' into fix-speculative-xpu
jikunshang Feb 26, 2026
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3 changes: 0 additions & 3 deletions vllm/platforms/xpu.py
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Original file line number Diff line number Diff line change
Expand Up @@ -201,9 +201,6 @@ def check_and_update_config(cls, vllm_config: VllmConfig) -> None:

if vllm_config.lora_config is not None:
compilation_config.mode = CompilationMode.NONE
# decrease triton kernel compilation scratch space for speculative decoding
if vllm_config.speculative_config is not None:
os.environ["IGC_ForceOCLSIMDWidth"] = "16" # noqa: SIM112
# check and update parallel config
parallel_config = vllm_config.parallel_config
# Only override worker_cls if it's still the default "auto"
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