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	SCHEDULE: NOV 11-17, 2006 CycleMeter: Detecting Fraudulent Peers in Internet Cycle Sharing Session: Grid Resource Management Event Type: Paper Time: 4:00pm - 4:30pm Session Chair: Karsten Schwan Author(s): Zheng Zhang, Y. Charlie Hu, Samuel P. Midkiff Location: 20-21 Abstract: Internet cycle sharing systems that utilize idle computing resources dramatically increase the available resources for high performance computing. Fraudulent resource providers, however, can subvert these systems. While previous research has investigated protection against resource providers that return bad results, we consider a different fraudulent behavior -- cycle shortchanging -- in which the resource provider faithfully executes the submitted job, but using only a smaller percentage of the CPU resources than he/she promises. To detect this shortchanging, we propose CycleMeter, a tool that allows an remotely executing application to accurately monitor the percentage of CPU resources it is utilizing throughput its execution period. CycleMeter employs a microbenchmark to measure the instantaneous CPU utilization of the application, and employs a simple and practical mechanism for embedding the microbenchmark into the application. Our experimental results show that CycleMeter incurs low overhead, and is highly effective in detecting a spectrum of cycle shortchanging behavior. This paper can be found in the ACM and IEEE Digital Libaries Click here for ACM Click here for IEEE Chair/ Author Details: Karsten Schwan (Chair) College of Computing Zheng Zhang Purdue University Y. Charlie Hu Purdue University Samuel P. Midkiff Purdue University
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