| 基于ERTOS的EWS过载性能 |
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| 引用本文： | 张文波,赵海,韩光洁,王小英.基于ERTOS的EWS过载性能[J].东北大学学报(自然科学版),2004,25(8):750-753. |
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| 作者姓名： | 张文波 赵海 韩光洁 王小英 |
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| 作者单位： | 东北大学,信息科学与工程学院,辽宁,沈阳,110004;东北大学,信息科学与工程学院,辽宁,沈阳,110004;东北大学,信息科学与工程学院,辽宁,沈阳,110004;东北大学,信息科学与工程学院,辽宁,沈阳,110004 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 在EWS过载情况下,CPU几乎被完全用于处理网卡中断,高层的应用程序得不到执行,EWS就出现了收包活锁现象·在此情况下,对一个EWS的收包过程进行了分析,并把EWS的收包过程看作由网卡中断处理和TCP/IP处理两部分构成·根据二级串连排队网络的理论,通过建立收包过程模型和对此模型的分析,提出了一种在系统预测到即将发生收包活锁的情况下,通过暂时关闭网卡中断来降低包到达速率,以解决收包活锁的方法,并对此方法进行了试验分析和验证·
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| 关 键 词： | 泊松分布 嵌入式RTOS 过载 收包活锁 EWS |
| 文章编号： | 1005-3026(2004)08-0750-04 |
| 修稿时间： | 2003年12月9日 |
Performance Analysis of Overloaded EWS Based on ERTOS |
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| ZHANG Wen-bo,ZHAO Hai,HAN Guang-jie,WANG Xiao-ying.Performance Analysis of Overloaded EWS Based on ERTOS[J].Journal of Northeastern University(Natural Science),2004,25(8):750-753. |
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| Authors: | ZHANG Wen-bo ZHAO Hai HAN Guang-jie WANG Xiao-ying |
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| Institution: | (1) Sch. of Info. Sci. and Eng., Northeastern Univ., Shenyang 110004, China |
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| Abstract: | When an EWS overloads, CPU is almost completely used to process NIC interruption. Thus, the high-level application program can not be executed, with a receiving livelock occuring in EWS. For such a case, an analysis is made for the receiving process of an EWS, and the receive-packet process can be viewed as two parts, i.e., the NIC interrupting process and TCP/IP process. According to the theory of 2-level serial queuing network system, an improved method is proposed by means of establishing a model of receive-packet process and analyzing in detail. It means that the NIC interruption will be ended temporarily to reduce the packet arrival rate so as to resolve the problem of receiving livelock by way of predicting the oncoming livelock in the system. The method has been verified through testings. |
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| Keywords: | EWS |
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