| Minimizing Paging Tradeoffs Applying Coscheduling Techniques in a Linux Cluster |
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| Francesc Gine - Universitat de Lleida Francesc Solsona - Universitat de Lleida Porfidio Hernandez - Universitat Autonoma de Barcelona Emilio Luque - Universitat Autonoma de Barcelona |
Our research is focussed on keeping both local and parallel jobs together in a non-dedicated cluster or NOW (Network of Workstations) and efficiently scheduling them by means of coscheduling mechanisms. The performance of a good coscheduling policy can decrease drastically if memory requirements are not kept in mind. The overflow of the physical memory into the virtual memory usually causes a severe performance penalty. A real implementation of a coscheduling technique for reducing the number of page faults across a non-dedicated Linux cluster is presented in this article. Our technique is based on knowledge of events obtained during execution, as communication activity, page faults and memory size of every task. Its performance is analyzed and compared with other coscheduling algorithms. |