[FEA]: Support CU_LAUNCH_ATTRIBUTE_PREFERRED_SHARED_MEMORY_CARVEOUT in LaunchConfig
@lijinf2 ya está trabajando en esto.
Desde el 18/8/2026.
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Descripción
Is this a duplicate?
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Area
cuda.core
Is your feature request related to a problem? Please describe.
LaunchConfig does not expose CU_LAUNCH_ATTRIBUTE_PREFERRED_SHARED_MEMORY_CARVEOUT, which sets the preferred shared-memory carveout (L1 / shared split hint) for a launch.
Parent tracking: #496.
Describe the solution you'd like
- Users can set
CU_LAUNCH_ATTRIBUTE_PREFERRED_SHARED_MEMORY_CARVEOUTviaLaunchConfig. - Mapping to the native launch attribute is tested.
Describe alternatives you've considered
Use cuda.bindings.driver (CUlaunchAttribute / CU_LAUNCH_ATTRIBUTE_PREFERRED_SHARED_MEMORY_CARVEOUT) and cuLaunchKernelEx directly.
Downside: leaves cuda.core users without a first-class LaunchConfig API; they must drop to low-level bindings, manage the attribute array themselves, and lose consistency with other LaunchConfig launch attributes (is_cooperative, programmatic_stream_serialization, etc.).
Additional context
Incremental LaunchConfig attribute coverage under #496 (same approach as #1334 for programmatic_stream_serialization).
No example code in the design notes for this attribute.
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