Title :
Evaluating memory energy efficiency in parallel I/O workloads
Author :
Yue, Jianhui ; Zhu, Yifeng ; Cai, Zhao
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Maine, Orono, ME
Abstract :
Power consumption is an important issue for cluster supercomputers as it directly affects their running cost and cooling requirements. This paper investigates the memory energy efficiency of high-end data servers used for supercomputers. Emerging memory technologies allow memory devices to dynamically adjust their power states. To achieve maximum energy saving, the memory management on data servers needs to judiciously utilize these energy-aware devices. As we explore different management schemes under four real-world parallel I/O workloads, we find that the memory energy consumption is determined by a complex interaction among four important factors: (1) cache hit rates that may directly translate performance gain into energy saving, (2) cache populating schemes that perform buffer allocation and affect access locality at the chip level, (3) request clustering that aims to temporally align memory transfers from different buses into the same memory chips, and (4) access patterns in workloads that affect the first three factors.
Keywords :
parallel machines; power aware computing; workstation clusters; access patterns; cache hit rates; cluster supercomputers; high-end data servers; maximum energy saving; memory energy efficiency; memory management; parallel I-O workloads; power consumption; Buffer storage; Clustering algorithms; Cooling; Costs; Energy consumption; Energy efficiency; Energy management; Memory management; Performance gain; Supercomputers;
Conference_Titel :
Cluster Computing, 2007 IEEE International Conference on
Conference_Location :
Austin, TX
Print_ISBN :
978-1-4244-1387-4
Electronic_ISBN :
1552-5244
DOI :
10.1109/CLUSTR.2007.4629213