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Xen的I/O虚拟化性能分析与优化 被引量:2
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作者 刘佩 章建雄 +1 位作者 马鹏 阎燕山 《计算机系统应用》 2017年第7期10-16,共7页
在Credit算法应用中,由I/O事务唤醒的VCPU处于最高优先级BOOST状态,优先抢占PCPU资源,使I/O操作的响应速度提高,但多个虚拟机同时进行I/O操作时,会引起较长延时和公平性原则被破坏问题.针对这个问题,研究分析SEDF算法、Credit算法、Cred... 在Credit算法应用中,由I/O事务唤醒的VCPU处于最高优先级BOOST状态,优先抢占PCPU资源,使I/O操作的响应速度提高,但多个虚拟机同时进行I/O操作时,会引起较长延时和公平性原则被破坏问题.针对这个问题,研究分析SEDF算法、Credit算法、Credit2算法,提出L-Credit调度算法解决多个虚拟机同时进行I/O操作引起响应延迟的问题.通过监测I/O设备环共享页面中响应和请求的个数的方法,对处于BOOST状态下I/O操作进一步细化排序,使稀疏型I/O操作较密集型I/O操作先调用执行.通过对L-Credit算法与Credit算法在同一应用场景下反复对比实验,得出L-Credit算法可以提高I/O响应性能,并且继承了Credit算法负载均衡和按比例公平共享的特点. 展开更多
关键词 I/O虚拟化 CREDIT SEDF credit2 L-Credit
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P2P network lending in the credit risk rating of the individual
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作者 Tang Guolei 《International English Education Research》 2015年第9期23-26,共4页
P2P lending network is person to person lending network, lnternet-based applications, individuals lending financial model to others through the network intermediary,' platform. Currently P2P lending network has devel... P2P lending network is person to person lending network, lnternet-based applications, individuals lending financial model to others through the network intermediary,' platform. Currently P2P lending network has developed rapidly, but the P2P network lending platform also are lacing increasing risks, the biggest risk is credit risk. This article from the credit rating perspective, comparative analysis of the existing credit rating methodology, Analysis to establish a relatively sound credit rating mechanisms, thus reducing credit risk. 展开更多
关键词 P2P network lending: credit risks: credit rating
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