Early wakeup: Improving the drowsy cache performance

Sunghoon Shim, Sungwoo Chung, Hongjun Choi, Cheol Hong Kim

Research output: Contribution to journalArticlepeer-review


As process technology scales down, leakage power consumption becomes comparable to dynamic power consumption. The drowsy cache technique is known as one of the most popular techniques for reducing the leakage power consumption in the data cache. However, the drowsy cache is reported to degrade the processor performance significantly. In this paper, to maintain the performance of the processor with the drowsy cache technique, we propose an early wakeup technique, which predicts the next cache line to be requested by utilizing the way-prediction information. The proposed technique efficiently reduces the number of accesses to the cache lines in drowsy mode. Our simulation results show that the proposed technique reduces the extra delay due to the drowsy cache scheme by 29.6%, on average.

Original languageEnglish
Pages (from-to)425-433
Number of pages9
JournalTurkish Journal of Electrical Engineering and Computer Sciences
Issue number2
Publication statusPublished - 2014


  • Drowsy cache
  • Early wakeup
  • Low-power design, leakage power
  • Processor architecture

ASJC Scopus subject areas

  • Computer Science(all)
  • Electrical and Electronic Engineering


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