An Adaptive Dynamic Request Scheduling Model for Multi-socket, Multi-core Web Servers

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• 作者：Guohua You ; Xuejing Wang ; Ying Zhao
• 关键词：Dynamic requests ; Scheduling ; Web server ; Multi ; core ; Multi ; socket
• 刊名：Arabian Journal for Science and Engineering
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：42
• 期：2
• 页码：751-764
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Engineering, general; Science, Humanities and Social Sciences, multidisciplinary;
• 出版者：Springer Berlin Heidelberg
• ISSN：2191-4281
• 卷排序：42

文摘

To implement a high-performance web server, it is necessary to fully exploit the performance of multi-core CPUs in the web server. Traditional dynamic request scheduling algorithms, such as first-come-first-served (FCFS), adopted in multi-socket, multi-core web servers, often cause multi-replica problem and ping-pong effect. We proposed a new dynamic request scheduling model for multi-socket, multi-core web servers in this paper to solve the above-mentioned issues. To fully exploit the performance of multi-socket, multi-core systems, the new model tries to allocate the dynamic requests of the same kind to the same core. Furthermore, to avoid load imbalance between the cores, the new model dynamically allocates dynamic request based on its service time and the load status of each core. We developed a simulation web server based on the new model and did some simulation experiments on it. The results of the experiments show that the new model could reduce the response time of dynamic requests in contrast to other scheduling algorithms, such as FCFS algorithm, which means the new model provides a solution to the multi-replica problem and ping-pong effect in multi-socket, multi-core systems.