Electrical computers and digital processing systems: processing – Processing control – Context preserving (e.g. – context swapping – checkpointing,...
Reexamination Certificate
2006-10-27
2008-12-16
Kim, Kenneth S (Department: 2111)
Electrical computers and digital processing systems: processing
Processing control
Context preserving (e.g., context swapping, checkpointing,...
C714S047300
Reexamination Certificate
active
07467289
ABSTRACT:
Software can freeze portions of a pipeline operation in a processor by asserting a predetermined freeze register in the processor. The processor halts operations relating to portions of a common pipeline processing in response to an asserted freeze register. Processor resources that operate downstream from the common pipeline continue to process any scheduled instructions. The processor is prevented from initiating any context switching in which a processor resource is allocated to a different channel. The processor stops supplying any additional data to downstream resources and ensures that the interface to downstream resources is clear of previously sent data. The processor prevents state machines from making additional requests. The processor asserts an acknowledgement indication in response to the freeze assertion when the processing has reached a stable state. Software is allowed to manipulate states and registers within the processor. Clearing the freeze register allows processing to resume.
REFERENCES:
patent: 6425122 (2002-07-01), Klingman
patent: 6754837 (2004-06-01), Helms
patent: 6779122 (2004-08-01), George et al.
patent: 7028197 (2006-04-01), Subramanian et al.
Dave Shail
Garlick Lincoln G.
Ma Dennis K.
Nuechterlein David W.
Sabella Paolo E.
Kim Kenneth S
NVIDIA Corporation
Townsend and Townsend and Crew
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