Name
Title | ||
|---|---|---|
Energy saving strategies for parallel applications with point-to-point communication phases |
Abstract | ||
|---|---|---|
Although high-performance computing traditionally focuses on the efficient execution of large-scale applications, both energy and power have become critical concerns when approaching exascale. Drastic increases in the power consumption of supercomputers affect significantly their operating costs and failure rates. In modern microprocessor architectures, equipped with dynamic voltage and frequency scaling (DVFS) and CPU clock modulation (throttling), the power consumption may be controlled in software. Additionally, network interconnect, such as Infiniband, may be exploited to maximize energy savings while the application performance loss and frequency switching overheads must be carefully balanced. This paper advocates for a runtime assessment of such overheads by means of characterizing point-to-point communications into phases followed by analyzing the time gaps between the communication calls. Certain communication and architectural parameters are taken into consideration in the three proposed frequency scaling strategies, which differ with respect to their treatment of the time gaps. The experimental results are presented for NAS parallel benchmark problems as well as for the realistic parallel electronic structure calculations performed by the widely used quantum chemistry package GAMESS. For the latter, three different process-to-core mappings were studied as to their energy savings under the proposed frequency scaling strategies and under the existing state-of-the-art techniques. Close to the maximum energy savings were obtained with a low performance loss of 2% on the given platform. |
Year | DOI | Venue |
|---|---|---|
2013 | 10.1016/j.jpdc.2013.03.006 | J. Parallel Distrib. Comput. |
Keywords | Field | DocType |
frequency scaling,maximum energy saving,nas parallel benchmark problem,proposed frequency,parallel application,energy saving,communication call,power consumption,certain communication,point-to-point communication phase,application performance loss,time gap,point to point communications | InfiniBand,Computer science,Microprocessor,Parallel computing,Frequency scaling,Point-to-point,GAMESS,Bandwidth throttling,Clock rate,Distributed computing,Overhead (business) | Journal |
Volume | Issue | ISSN |
73 | 8 | 0743-7315 |
Citations | PageRank | References |
6 | 0.44 | 27 |
Authors | ||
4 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Vaibhav Sundriyal | 1 | 49 | 4.99 |
| Masha Sosonkina | 2 | 272 | 45.62 |
| Alexander Gaenko | 3 | 16 | 3.81 |
| Zhao Zhang | 4 | 79 | 7.53 |