Self-optimization of performance-per-watt for interleaved memory systems

Bithika Khargharia, Salim Hariri, Mazin S. Yousif

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations


With the increased complexity of platforms coupled with data centers' servers sprawl, power consumption is reaching unsustainable limits. Memory is an important target for platform-level energy efficiency, where most power management techniques use multiple power state DRAM devices to transition them to low-power states when they are "sufficiently" idle. However, fully-interleaved memory in high-performance servers presents a research challenge to the memory power management problem. Due to data striping across all memory modules, memory accesses are distributed in a manner that considerably reduces the idleness of memory modules to warrant transitions to low-power states. In this paper we introduce a novel technique for dynamic memory interleaving that is adaptive to incoming workload in a manner that reduces memory energy consumption while maintaining the performance at an acceptable level. We use optimization theory to formulate and solve the powerperformance management problem. We use dynamic cache line migration techniques to increase the idleness of memory modules by consolidating the application's working-set on a minimal set of ranks. Our technique yields energy saving of about 48.8 % (26.7 kJ) compared to traditional techniques measured at 4.5%. It delivers the maximum performance-per-watt during all phases of the application execution with a maximum performance-per-watt improvement of 88.48%.

Original languageEnglish (US)
Title of host publicationHigh Performance Computing - HiPC 2007 - 14th International Conference, Proceedings
Number of pages13
ISBN (Print)9783540772194
StatePublished - 2007
Event14th International Conference on High-Performance Computing, HiPC 2007 - Goa, India
Duration: Dec 18 2007Dec 21 2007

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume4873 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349


Other14th International Conference on High-Performance Computing, HiPC 2007

ASJC Scopus subject areas

  • Theoretical Computer Science
  • General Computer Science


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