I-DVFS: Instantaneous Frequency Switch During Dynamic Voltage and Frequency Scaling
Abstract
This work presents I-DVFS: a novel approach to perform instantaneously the frequency switch during dynamic voltage frequency scaling (DVFS). The I-DVFS, unlike legacy DVFS, does not require halting an IPs execution to perform a DVFS transition, and thus, the performance overhead of DVFS is both reduced and more deterministic. Such attributes enable the more frequent use of DVFS and, thus, improve an IPs performance, power, and energy efficiency. Nonetheless, the overlapping of an IPs DVFS transition with the normal IPs execution creates a number of issues that need careful treatment at design time to ensure the reliable operation in the field. This article presents these issues and elucidates on how they are addressed in an implementation of I-DVFS that has been productized and can be found in millions of CPUs.
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- I-DVFS: Instantaneous Frequency Switch During Dynamic Voltage and Frequency Scaling
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Published: 01 September 2021
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