Proceedings of the 6th Asia-Pacific Workshop on Systems最新文献

Go Gentle into the Good Night via Controlled Battery Discharging 通过控制电池放电，温柔地进入晚安

Proceedings of the 6th Asia-Pacific Workshop on Systems Pub Date : 2015-07-27 DOI: 10.1145/2797022.2797035

Shih-Hao Liang, T. Chiueh, Welkin Ling

{"title":"Go Gentle into the Good Night via Controlled Battery Discharging","authors":"Shih-Hao Liang, T. Chiueh, Welkin Ling","doi":"10.1145/2797022.2797035","DOIUrl":"https://doi.org/10.1145/2797022.2797035","url":null,"abstract":"Prevalent battery management approaches for mobile devices treated a battery's residual capacity as a given budget and tried to make the best of this budget by turning off lower-priority tasks. In contrast, the research reported in this paper aims to maximize the quantitative value of a battery's residual capacity by operating the battery according to its discharge characteristic curves (DCC), which describes a battery's discharging dynamics in terms of the correlation among its voltage level, capacity and discharging current. According to the DCC theory, it is possible to increase a battery's effective capacity in terms of Ampere hours by capping the discharging current in a certain way after its capacity falls below a threshold. This paper describes a DCC-based Battery Discharging (or DBD) technique that is capable of automatically deriving a battery's DCC, using the DCC to determine a suitable instantaneous discharge current budget, and limiting the total discharge current under that budget. Measurements on an operational prototype show that DBD is capable of extending a battery's residual capacity by more than 20% after its SOC is reduced to 30%.","PeriodicalId":125617,"journal":{"name":"Proceedings of the 6th Asia-Pacific Workshop on Systems","volume":"77A 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132723359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

For a Microkernel, a Big Lock Is Fine 对于微内核来说，一个大的锁是可以的

Proceedings of the 6th Asia-Pacific Workshop on Systems Pub Date : 2015-07-27 DOI: 10.1145/2797022.2797042

S. Peters, A. Danis, Kevin Elphinstone, G. Heiser

引用次数: 18

Rethinking Compiler Optimizations for the Linux Kernel: An Explorative Study 重新思考Linux内核的编译器优化:一个探索性研究

Proceedings of the 6th Asia-Pacific Workshop on Systems Pub Date : 2015-07-27 DOI: 10.1145/2797022.2797030

Pengfei Yuan, Yao Guo, Xiangqun Chen

引用次数: 5

TotalCOW: Unleash the Power of Copy-On-Write for Thin-provisioned Containers TotalCOW:为瘦配置容器释放写时复制的能力

Proceedings of the 6th Asia-Pacific Workshop on Systems Pub Date : 2015-07-27 DOI: 10.1145/2797022.2797024

Xingbo Wu, Wenguang Wang, Song Jiang

{"title":"TotalCOW: Unleash the Power of Copy-On-Write for Thin-provisioned Containers","authors":"Xingbo Wu, Wenguang Wang, Song Jiang","doi":"10.1145/2797022.2797024","DOIUrl":"https://doi.org/10.1145/2797022.2797024","url":null,"abstract":"Modern file systems leverage the Copy-on-Write (COW) technique to efficiently create snapshots. COW can significantly reduce demand on disk space and I/O bandwidth by not duplicating entire files at the time of making the snapshots. However, memory space and I/O requests demanded by applications cannot benefit from this technique. In existing systems, a disk block shared by multiple files due to COW would be read from the disk multiple times. Each block in the reads is treated as an independent one in different files and is cached as a sperate block in memory. This issue is due to the fact that current file access and caching are based on logic file addresses. It poses a significant challenge on the emerging light-weight container virtualization techniques, such as Linux Container and Docker, which rely on COW to quickly spawn a large number of thin-provisioned container instances. We propose a lightweight approach to address this issue by leveraging knowledge about files produced by COW. Experimental results show that a prototyped system using the approach, named TotalCOW, can significantly remove redundant disk reads and caching without compromising efficiency of accessing COW files.","PeriodicalId":125617,"journal":{"name":"Proceedings of the 6th Asia-Pacific Workshop on Systems","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123709419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 18

Anatomy of Cloud Monitoring and Metering: A case study and open problems 云监测和计量的剖析:一个案例研究和开放性问题

Proceedings of the 6th Asia-Pacific Workshop on Systems Pub Date : 2015-07-27 DOI: 10.1145/2797022.2797039

Ali Anwar, A. Sailer, Andrzej Kochut, A. Butt

{"title":"Anatomy of Cloud Monitoring and Metering: A case study and open problems","authors":"Ali Anwar, A. Sailer, Andrzej Kochut, A. Butt","doi":"10.1145/2797022.2797039","DOIUrl":"https://doi.org/10.1145/2797022.2797039","url":null,"abstract":"Microservices based architecture has recently gained traction among the cloud service providers in quest for a more scalable and reliable modular architecture. In parallel with this architectural choice, cloud providers are also facing the market demand for fine grained usage based prices. Both the management of the microservices complex dependencies, as well as the fine grained metering require the providers to track and log detailed monitoring data from their deployed cloud setups. Hence, on one hand, the providers need to record all such performance changes and events, while on the other hand, they are concerned with the additional cost associated with the resources required to store and process this ever increasing amount of collected data. In this paper, we analyze the design of the monitoring subsystem provided by open source cloud solutions, such as OpenStack. Specifically, we analyze how the monitoring data is collected by OpenStack and assess the characteristics of the data it collects, aiming to pinpoint the limitations of the current approach and suggest alternate solutions. Our preliminary evaluation of the proposed solutions reveals that it is possible to reduce the monitored data size by up to 80% and missed anomaly detection rate from 3% to as low as 0.05% to 0.1%.","PeriodicalId":125617,"journal":{"name":"Proceedings of the 6th Asia-Pacific Workshop on Systems","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125348242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 20

Zero-copy Migration for Lightweight Software Rejuvenation of Virtualized Systems 虚拟化系统轻量级软件复兴的零拷贝迁移

Proceedings of the 6th Asia-Pacific Workshop on Systems Pub Date : 2015-07-27 DOI: 10.1145/2797022.2797026

Kenichi Kourai, H. Ooba

引用次数: 14

Mjölnir: The Magical Web Application Hammer Mjölnir:神奇的Web应用程序之锤

Proceedings of the 6th Asia-Pacific Workshop on Systems Pub Date : 2015-07-27 DOI: 10.1145/2797022.2797025

Jelle van den Hooff, David Lazar, James W. Mickens

引用次数: 0

InterFS: An Interplanted Distributed File System to Improve Storage Utilization InterFS:一种提高存储利用率的嵌入式分布式文件系统

Proceedings of the 6th Asia-Pacific Workshop on Systems Pub Date : 2015-07-27 DOI: 10.1145/2797022.2797036

Peng Wang, LeThanhMan Cao, Chunbo Lai, Leqi Zou, Guangyu Sun, J. Cong

{"title":"InterFS: An Interplanted Distributed File System to Improve Storage Utilization","authors":"Peng Wang, LeThanhMan Cao, Chunbo Lai, Leqi Zou, Guangyu Sun, J. Cong","doi":"10.1145/2797022.2797036","DOIUrl":"https://doi.org/10.1145/2797022.2797036","url":null,"abstract":"Resource under-utilization is a common problem in modern data centers. Though researchers have proposed consolidation techniques to improve utilization of computing resources, there still lacks an approach to mitigate particularly low utilization of storage capacity in clusters for online services. A potential solution is to \"interplant\" a distributed storage system together with the services on these clusters to leverage the unused storage. However, avoiding performance interference with existing services is an essential prerequisite for interplanting. Thus, we propose InterFS, a POSIX-compliant distributed file system aiming at fully exploiting the storage resource on data center clusters. We adopt intelligent resource isolation, peak load dodging, and region-based replica placement schemes in InterFS. Therefore, it can be interplanted with other resource-intensive services without interfering with them, and amply fulfill the storage requirements of small-scale applications in the data center. Currently InterFS is deployed in 20,000+ servers at Baidu, providing 80 PB storage space to 200+ long-tailed services.","PeriodicalId":125617,"journal":{"name":"Proceedings of the 6th Asia-Pacific Workshop on Systems","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116420376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

MemScope: Analyzing Memory Duplication on Android Systems MemScope:分析Android系统上的内存复制

Proceedings of the 6th Asia-Pacific Workshop on Systems Pub Date : 2015-07-27 DOI: 10.1145/2797022.2797023

Byeoksan Lee, Seongmin Kim, Eru Park, Dongsu Han

引用次数: 11

Anatomizing System Activities on Interactive Wearable Devices 交互式可穿戴设备上的系统活动解剖

Proceedings of the 6th Asia-Pacific Workshop on Systems Pub Date : 2015-07-27 DOI: 10.1145/2797022.2797032

Renju Liu, Lintong Jiang, Ningzhe Jiang, F. Lin

{"title":"Anatomizing System Activities on Interactive Wearable Devices","authors":"Renju Liu, Lintong Jiang, Ningzhe Jiang, F. Lin","doi":"10.1145/2797022.2797032","DOIUrl":"https://doi.org/10.1145/2797022.2797032","url":null,"abstract":"This paper presents a detailed, first-of-its-kind anatomy of a commodity interactive wearable system. We asked two questions: (1) do interactive wearables deliver \"close-to-metal\" energy efficiency and interactive performance, and if not (2) what are the root causes preventing them from doing so? Recognizing that the usage of a wearable device is dominated by simple, short use scenarios, we profile a core set of the scenarios on two cutting-edge Android Wear devices. Following a drill down approach, we capture system behaviors at a wide spectrum of granularities, from system power and user-perceived latencies, to OS activities, to function calls happened in individual processes. To make such a profiling possible, we have extensively customized profilers, analyzers, and kernel facilities. The profiling results suggest that the current Android Wear devices are far from efficient and responsive: simply updating a displayed time keeps a device intermittently busy for 400 ms; touching to show a notification takes more than 1 second. Our results further suggest that the Android Wear OS, which inherits much of its architecture from handheld, be responsible. For example, the OS's activity and window managers often dominate CPU usage; a simple UI task, which should finish in a snap, is often scheduled to be interleaved with numerous CPU idle periods and other unrelated tasks. Our findings urge a rethink of the OS towards directly addressing wearable's unique usage.","PeriodicalId":125617,"journal":{"name":"Proceedings of the 6th Asia-Pacific Workshop on Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116374846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11