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MultiScale: Memory System DVFS with Multiple Memory Controllers
| Content Provider | CiteSeerX |
|---|---|
| Author | Bhattacharjee, Abhishek Deng, Qingyuan Meisner, David |
| Abstract | The fraction of server energy consumed by the memory system has been increasing rapidly and is now on par with that consumed by processors. Recent work demonstrates that substantial memory energy can be saved with only a small, tightly-controlled performance degradation using memory Dynamic Frequency and Voltage Scaling (DVFS). Prior studies consider only servers with a single memory controller (MC); however, multicore server processors have begun to incorporate multiple MCs. We propose MultiScale, the first technique to coordinate DVFS across multiple MCs, memory channels, and memory devices. Under operating system control, MultiScale monitors application bandwidth requirements across MCs. It then uses a heuristic algorithm to select and apply a frequency combination that will minimize the overall system energy within user-specified per-application performance constraints. Our results demon-strate that MultiScale reduces system energy consumption significantly, compared to prior approaches, while respecting the user-specified performance constraints. |
| File Format | |
| Access Restriction | Open |
| Subject Keyword | Tightly-controlled Performance Degradation Overall System Energy Memory Device User-specified Per-application Performance Constraint Single Memory Controller Server Processor Multiple Mc Server Energy System Energy Consumption Substantial Memory Energy Memory Channel Multiple Memory Controller Frequency Combination Memory Dynamic Frequency Multiscale Monitor Application Bandwidth Requirement Memory System Dvfs Voltage Scaling System Control User-specified Performance Constraint |
| Content Type | Text |
