Cornell University

Nevin Kirman

Meyrem Kirman

Engin Ipek

A reconfigurable multiprocessor system including a number of processing units and components enabling executing sequential code collectively at processing units and enabling changing the architectural configuration of the processing units.

Systems and methods for reconfiguring on-chip multiprocessors

A technique known as checkpointed early load retirement, combines register checkpointing load-value prediction to manage long-latency loads. When a long-latency load reaches the retirement stage unresolved, the processor enters Clear mode by (1) taking a Checkpoint of the architectural registers, (2) supplying a load-value prediction to consumers, and (3) early-retiring the long-latency load. This unclogs retirement, thereby 'clearing the way' for subsequent instructions to retire, and also allowing instructions dependent on the long-latency load to execute sooner. When the actual value returns from memory, it is compared against the prediction. A misprediction causes the processor to roll back to the checkpoint, discarding all subsequent computation.

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Ithaca, NY, United States of America

Nevin Kirman