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Perform explicit culling step only if LLG is submitted #9040

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Merged
fjetter merged 1 commit into from
Apr 15, 2025
Merged

Perform explicit culling step only if LLG is submitted #9040

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8 changes: 6 additions & 2 deletions distributed/scheduler.py
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Original file line number Diff line number Diff line change
Expand Up @@ -54,6 +54,7 @@

import dask
import dask.utils
from dask._expr import LLGExpr
from dask._task_spec import DependenciesMapping, GraphNode, convert_legacy_graph
from dask.core import istask, validate_key
from dask.typing import Key, no_default
Expand Down Expand Up @@ -4878,9 +4879,12 @@ async def update_graph(

materialization_done = time()
logger.debug("Materialization done. Got %i tasks.", len(dsk))
# Most/all other expression types are implementing their own
# culling. For LLGExpr we just don't know
explicit_culling = isinstance(expr, LLGExpr)
del expr

dsk = _cull(dsk, keys)
if explicit_culling:
dsk = _cull(dsk, keys)

if not internal_priority:
internal_priority = await offload(dask.order.order, dsk=dsk)
Expand Down
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