Filling the Memory Access Gap: A Case for On-Chip Magnetic Storage
CARNEGIE-MELLON UNIV PITTSBURGH PA SCHOOL OF COMPUTER SCIENCE
Pagination or Media Count:
For decades, The memory hierarchy access gap has plagued computer architects with the RAMdisk gap widening to about 6 orders of magnitude in 1999. However, an exciting new storage technology based on MicroElectroMechanical Systems MEMS is poised to fill a large portion of this performance gap, delivering significant performance improvements and enabling many new types of applications. This research explores the impact MEMS-based storage will have on computer systems. Working closely with researchers building MEMS-based storage devices, we examine the performance impact of several design points. Results from five different applications show that MEMS-based storage can reduce application IO stall times by 80-99, with overall performance improvements ranging from 1.1x to 20x for these applications. Most of these improvements result from the fact that average access times for MEMS-based storage are 5 times faster than disks e.g., 1-3ms. Others result from fundamental differences in The physical behavior of MEMS-based storage. Combined, these characteristics create numerous opportunities for restructuring the storagememory hierarchy.
- Computer Hardware