Overview
We introduce a new OS principal called power sandbox, which enables one app to observe the fine-grained power consumption of itself running in its vertical slice of the hardware/software stack.
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We present an analysis of existing approaches to app power awareness, demonstrate the inadequacies, and identify the cause as power entanglement rooted in OS resource multiplexing. In response, we present a novel OS principal called power sandbox that allows an app to observe the power of itself and its vertical environment.
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We enforce psbox through two lightweight kernel extensions: resource ballooning and power state virtualization.
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We confine the psbox performance cost to the sandboxed app with two techniques: tracking and charging lost sharing opportunities and encapsulating resource balllons as normal scheduling entities.
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On top of the Linux kernel v4.4, we implement psbox for CPU, GPU, DSP, and WiFi interface, without disruptive kernel overhaul. Our evaluation shows that psbox reliably insulates power impacts, incurs minor cost, maintains fairness, and facilitates the construction of power-aware apps.
Related Publication
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[EuroSys’18] "Power Sandbox: Power Awareness Redefined," Liwei Guo*, Tiantu Xu*, Mengwei Xu, Xuanzhe Liu, and Felix Xiaozhu Lin (*=co-primary), Proc. ACM EuroSys Conference, 2018.
Source code
ftp://ftp.ecn.purdue.edu/xzl/software/powersandbox/
People
- PhD students
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Liwei Guo (lead), Purdue ECE
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Tiantu Xu (lead), Purdue ECE
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Mengwei Xu, Peking University
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- Faculty and Researchers
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Xuanzhe Liu, Peking University
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Felix Xiaozhu Lin, Purdue ECE
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License
All the pre-existing code and data are subject to their own licenses. All the userspace programs and kernel modules resulted from this project are under FreeBSD license.
Copyright (c) 2017-2018, Purdue University
All rights reserved.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
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Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
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Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
The views and conclusions contained in the software and documentation are those of the authors and should not be interpreted as representing official policies, either expressed or implied, of Purdue University.