Turbo-ROB: A Low Cost Checkpoint/Restore Accelerator

Provided by: University of Toledo
Topic: Hardware
Format: PDF
Modern processors use speculative execution to improve performance. However, speculative execution requires a checkpoint/restore mechanism to repair the machine's state whenever speculation fails. Existing checkpoint/restore mechanisms do not scale well for processors with relatively large windows (i.e., 128 or more). This paper presents turbo-ROB, a checkpoint/restore recovery accelerator that can complement or replace existing checkpoint/restore mechanisms. The authors show that the turbo-ROB improves performance and reduces resource requirements compared to a conventional re-order buffer mechanism.

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