Hardware
Floorsweeping
In plain English
Disabling selected hardware resources so a chip can ship with a supported configuration despite defects or product segmentation.
Technical definition
Floorsweeping removes selected execution or other hardware resources from the enabled configuration exposed to software.
Engineering details
The logical resource count can remain consistent across a product while the physical locations of enabled units differ. Cluster scheduling may therefore reveal uneven usable groups. An SM identifier and a logical grouping alone do not uniquely determine the physical position of a core on a die.
Why it matters
Persistent kernels and cluster sizes interact with the available grouping of execution resources. Assuming that a cluster size divides the device-wide SM count is insufficient when co-scheduling is constrained within individual GPCs.
How to read it in InferenceX
The Blackwell article distinguishes logical GPC mapping from a hypothesized physical layout. Its latency probes and cluster experiments do not independently prove the full chip floorplan.