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SAREC: A Security-Aware Scheduling Strategy for Real-Time Applications on Clusters

Tao Xie, Xiao Qin, and Andrew Sung

Department of Computer Science
New Mexico Institute of Mining and Technology
801 Leroy Place, Socorro, New Mexico 87801-4796
{xietao, xqin, sung}@cs.nmt.edu

Security requirements of security-critical real-time applications must be met in addition to satisfying timing constraints. However, conventional real-time scheduling algorithms ignore the applications’ security requirements. In recognition that an increasing number of applications running on clusters demand both real-time performance and security, we investigate the problem of scheduling a set of independent real-time tasks with various security requirements. We propose a security overhead model that is capable of measuring security overheads incurred by security-critical tasks. Further, we propose a security-aware scheduling strategy, or SAREC, which integrates security requirements into scheduling for real-time applications by employing our security overhead model. To evaluate the effectiveness of SAREC, we implement a security-aware real-time scheduling algorithm (SAREC-EDF), which incorporates the earliest deadline first (EDF) scheduling algorithm into SAREC. Extensive simulation experiments show that SAREC-EDF significantly improves overall system performance over three baseline scheduling algorithms (variations of EDF) by up to 72.55%.

Proceedings of the 34th International Conference on Parallel Processing (ICPP 2005), Norway, June 14-17, 2005.