Towards better CPU power management on multicore smartphones
Towards better CPU power management on multicore smartphones
复制标题
在多核智能手机上实现更好的 CPU 电源管理
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
Feng Zhao
中科院分区：
文献类型：
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作者：
Yifan Zhang;Xudong Wang;Xuanzhe Liu;Yunxin Liu;Zhuang Li;Feng Zhao
尽管多核智能手机已经越来越成为主流，但智能手机应用程序是否以及如何利用多核cpu来提高性能尚不清楚。本文从功耗和计算成本方面研究了使用多核cpu的移动应用程序的性能。以Web浏览为例，我们的初步测量结果表明，即使是像具有多线程加速的Web浏览器这样的大型应用程序也不能充分利用多核cpu。此外，我们发现智能手机上现有的CPU功率模型不适合现代多核CPU。我们开发了一种新的CPU功耗模型，具有较高的准确率，平均达到95.6%。我们的工作有助于更好地理解多核智能手机的性能，并为多核智能手机上更好的CPU电源管理铺平道路。
Although multicore smartphones have become increasingly mainstream, it is unclear whether and how smartphone applications can utilize multicore CPUs to improve performance. In this paper we study the performance of mobile applications using multicore CPUs, in terms of power and computation cost. Using Web browsing as an example, our preliminary measurement results show that even large applications like Web browsers with multi-threading acceleration cannot fully utilize the multicore CPUs. Furthermore, we find that the existing CPU power models on smartphones are ill-suited for modern multicore CPUs. We develop a new CPU power model with a high accuracy, 95.6% on average. Our work helps to better understand the performance of multicore smartphones and paves the way towards better CPU power management on multicore smartphones.