Co-Adjusting Voltage/Frequency State and Interrupt Rate for Improving Energy-Efficiency of Latency-Critical Applications
| Autor: | Hyungwon Park, Ki-Dong Kang, Gyeongseo Park, Daehoon Kim |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Power management
latency-critical applications General Computer Science Computer science 02 engineering and technology Interrupt coalescing 01 natural sciences 0103 physical sciences 0202 electrical engineering electronic engineering information engineering General Materials Science Latency (engineering) Frequency scaling 010302 applied physics business.industry General Engineering Electrical engineering interrupt coalescing Energy consumption 020202 computer hardware & architecture dynamic voltage and frequency scaling lcsh:Electrical engineering. Electronics. Nuclear engineering Interrupt business lcsh:TK1-9971 Efficient energy use Voltage |
| Zdroj: | IEEE Access, Vol 8, Pp 201028-201039 (2020) |
| ISSN: | 2169-3536 |
| DOI: | 10.1109/access.2020.3035777 |
| Popis: | As the power/energy consumption is one of the major contributors to the Total Cost of Ownership (TCO), improving power/energy efficiency is crucial for large-scale data centers where latency-critical applications are commonly accommodated while computing resources are usually under-utilized. For improving the power/energy efficiency of processors, most of the commercial processors support Dynamic Voltage and Frequency Scaling (DVFS) technology that enables to adjust Voltage and Frequency state (V/F state) of the processor dynamically. In particular, for the latency-critical applications, many prior studies propose power management policies using the DVFS for the latency-critical applications, which minimizes the performance degradation or satisfies the Service Level Objectives (SLOs) constraints. Meanwhile, although the interrupt rate also affects the response latency and energy efficiency of latency-critical applications considerably, those prior studies just introduce policies for V/F state adjustment while not considering the interrupt rate. Therefore, in this article, we investigate the impact of adjusting the interrupt rate on the tail response latency and energy consumption. Through our experimental results, we observe that adjusting interrupt rate along with V/F state management varies the performance and energy consumption considerably, and provides an opportunity to reduce energy further by showing latency overlap between different V/F states. Based on the observation, we show the quantitative potential in improving energy efficiency of co-adjusting V/F state and interrupt rate with a simple management policy, called Co-PI . Co-PI searches the most energy-efficient combination of the V/F state and interrupt rate from the latency and energy tables that we obtain through offline profiling, and reflect the combination to the core and NIC. Co-PI reduces energy consumption by 34.1% and 25.1% compared with performance and ondemand governors while showing the almost same tail response latency with the performance governor that operates cores at the highest V/F state statically. |
| Databáze: | OpenAIRE |
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