【摘要】：虛擬化技術(shù)擁有良好的資源整合能力和安全隔離性，已在工業(yè)界得到廣泛的運(yùn)用。雖然分離驅(qū)動(dòng)模型解決了多個(gè)虛擬機(jī)共享單一物理設(shè)備的問題，但是目前的虛擬中斷只能靜態(tài)的發(fā)送給虛擬域的第一個(gè)虛擬處理器。這種靜態(tài)分發(fā)方法造成了嚴(yán)重的中斷負(fù)載不均衡問題，進(jìn)而加大了中斷處理延遲，限制了虛擬化SMP架構(gòu)下的I/O性能。 虛擬化SMP架構(gòu)下的中斷負(fù)載均衡方法有效地解決了上述問題。該方法根據(jù)優(yōu)先級(jí)不同，從所有的虛擬處理器中選擇合適的虛擬處理器接受虛擬中斷，均衡了虛擬中斷負(fù)載，減少了虛擬中斷處理時(shí)延。虛擬化SMP架構(gòu)下的中斷負(fù)載均衡方法包含三種機(jī)制。首先，通過(guò)基于閾值的輪轉(zhuǎn)方式將虛擬中斷分發(fā)給所有可用的虛擬處理器，從而平衡虛擬中斷負(fù)載。其次，通過(guò)采樣虛擬中斷負(fù)載來(lái)反饋調(diào)節(jié)閾值，在不同的虛擬中斷負(fù)載下達(dá)到最佳的虛擬中斷處理性能；通過(guò)實(shí)時(shí)地對(duì)虛擬中斷的負(fù)載進(jìn)行采樣以反饋調(diào)節(jié)虛擬域的閾值配置，，自適應(yīng)的調(diào)節(jié)了虛擬中斷分散程度。最后，針對(duì)虛擬機(jī)調(diào)度狀態(tài)調(diào)整虛擬中斷分發(fā)，從而減小虛擬中斷處理的延遲；通過(guò)將虛擬機(jī)管理器的調(diào)度狀態(tài)加入到虛擬中斷分發(fā)的過(guò)程中，避免了額外的虛擬中斷處理延遲。通過(guò)采用這三種機(jī)制，虛擬化SMP架構(gòu)下的虛擬中斷動(dòng)態(tài)分發(fā)不僅均衡了各個(gè)虛擬處理器的虛擬中斷負(fù)載，也減小了虛擬中斷處理的時(shí)延。 實(shí)驗(yàn)表明，通過(guò)采用虛擬化SMP架構(gòu)下中斷負(fù)載均衡該方法后，虛擬化SMP架構(gòu)下的網(wǎng)絡(luò)接收性能在52字節(jié)數(shù)據(jù)包負(fù)載下得到了99%的提升，在512字節(jié)數(shù)據(jù)包負(fù)載下得到了16%的提升，同時(shí)虛擬化SMP架構(gòu)下的并發(fā)Web服務(wù)性能也得到了4%的提升。
[Abstract]:Virtualization technology has been widely used in industry because of its good capability of resource integration and security isolation. Although the decoupling driver model solves the problem of multiple virtual machines sharing a single physical device, the current virtual interrupt can only be sent statically to the first virtual processor in the virtual domain. This static distribution method causes serious interrupt load imbalance which increases interrupt processing latency and limits I / O performance under virtualized SMP architecture. The interrupt load balancing method under virtualized SMP architecture effectively solves the above problems. According to different priorities, the method selects suitable virtual processors from all virtual processors to accept virtual interrupts, balances the load of virtual interrupts and reduces the delay of virtual interrupt processing. Interrupt load balancing under virtualized SMP architecture includes three mechanisms. Firstly, virtual interrupt is distributed to all available virtual processors through threshold based rotation to balance the virtual interrupt load. Secondly, by sampling the virtual interrupt load to adjust the threshold value, the optimal virtual interrupt processing performance is achieved under different virtual interrupt loads, and the threshold configuration of the virtual domain is adjusted by sampling the virtual interrupt load in real time. Adaptively adjusts the degree of virtual interrupt dispersion. Finally, the virtual interrupt distribution is adjusted according to the virtual machine scheduling state to reduce the delay of virtual interrupt processing, and the scheduling state of virtual machine manager is added to the process of virtual interrupt distribution. Additional virtual interrupt processing delays are avoided. By adopting these three mechanisms, the virtual interrupt dynamic distribution under virtualized SMP architecture not only balances the virtual interrupt load of each virtual processor, but also reduces the delay of virtual interrupt processing. The experimental results show that the network receiving performance under virtualized SMP architecture can be improved by 99% under 52 bytes packet load and 16% under 512-byte packet load by using interrupt load balancing method under virtualized SMP architecture. At the same time, the performance of concurrent Web services under virtualized SMP architecture has been improved by 4%.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TP332

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