Cool-cache for hot multimedia

  • Authors:
  • Osman S. Unsal;Raksit Ashok;Israel Koren;C. Mani Krishna;Csaba Andras Moritz

  • Affiliations:
  • University of Massachusetts;University of Massachusetts;University of Massachusetts;University of Massachusetts;University of Massachusetts

  • Venue:
  • Proceedings of the 34th annual ACM/IEEE international symposium on Microarchitecture
  • Year:
  • 2001

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Abstract

We claim that the unique characteristics of multimedia applications dictate media-sensitive architectural and compiler approaches to reduce the power consumption of the data cache. Our motivation is exploring energy savings for real-time multimedia workloads without sacrificing performance. Here, we present two complementary media-sensitive energy-saving techniques that leverage static information. While our first technique is applicable to existing architectures, in our second technique we adopt a more radical approach and propose a new caching architecture by re-evaluating the architecture-compiler interface.Our experiments show that substantial energy savings are possible in the data cache. Across a wide range of cache and architectural configurations we obtain up to 77% energy savings, while the performance varies from 14% improvement to 4% degradation depending on the application.