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[docs] Document --scheduler-cls base class requirement (extend AsyncScheduler, not Scheduler) (#43724)

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Signed-off-by: Georgii Kliukovkin <kliukovkin@gmail.com>
Signed-off-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-authored-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>
This commit is contained in:
Georgii Kliukovkin
2026-06-11 10:49:51 +01:00
committed by GitHub
co-authored by Claude Sonnet 4.6 Harry Mellor
parent 0d657e44dc
commit 7852e50e4d
1 changed files with 6 additions and 5 deletions
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vllm/config/scheduler.py
+6 -5
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@@ -175,12 +175,13 @@ class SchedulerConfig:
return Scheduler
# This warning can be removed once the Scheduler interface is
# finalized and we can maintain support for scheduler classes that
# implement it
# The first half of this warning can be removed once the Scheduler interface is
# finalized and we can maintain support for scheduler classes that implement it
logger.warning_once(
"Using custom scheduler class %s. This scheduler interface is "
"not public and compatibility may not be maintained.",
"Using custom scheduler class %s. This scheduler interface is not public "
"and compatibility may not be maintained. If you have subclassed Scheduler "
"instead of AsyncScheduler, you will see degraded performance due to async "
"scheduling being disabled.",
self.scheduler_cls, # type: ignore[arg-type]
)
if not isinstance(self.scheduler_cls, str):