Active bank switching for temperature control of the register file in a microprocessor

Authors:
Kimish Patel;Wonbok Lee;Massoud Pedram
Affiliations:
University of Southern California, Los Angeles, CA;University of Southern California, Los Angeles, CA;University of Southern California, Los Angeles, CA
Venue:
Proceedings of the 17th ACM Great Lakes symposium on VLSI
Year:
2007

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Abstract

An effective thermal management scheme, called active bank switching, for temperature control in the register file of a microprocessor is presented. The idea is to divide the physical register file into two equal-sized banks, and to alternate between the two banks when allocating new registers to the instruction operands. Experimental results show that this periodic active bank switching scheme achieves 3.4°C of steady-state temperature reduction, with a mere 0.75% average performance penalty.