内存虚拟化是系统虚拟化中如何有效抽象、利用、隔离计算机物理内存的重要方法,决定着系统虚拟化的整体性能.传统的纯软件内存虚拟化方法会产生较大的资源开销并且兼容性差,而硬件辅助的内存虚拟化方法需要重新设计处理器硬件架构.基于M...内存虚拟化是系统虚拟化中如何有效抽象、利用、隔离计算机物理内存的重要方法,决定着系统虚拟化的整体性能.传统的纯软件内存虚拟化方法会产生较大的资源开销并且兼容性差,而硬件辅助的内存虚拟化方法需要重新设计处理器硬件架构.基于MIPS架构处理器提出一种软硬件协同的内存虚拟化方法,在不增加硬件支持的情况下提高内存虚拟化性能.提出的多层虚拟地址空间模型不仅可以解决MIPS架构处理器存在的虚拟化缺陷,而且可以在已有的内存虚拟化方法上提高性能.在多层虚拟地址空间模型的基础上,提出基于地址空间标识码(address space identity,ASID)、动态划分的旁路转换缓冲(translation lookaside buffer,TLB)共享方法,降低了虚拟机切换的开销.最终,在MIPS架构的龙芯3号处理器上实现了系统虚拟机VIRT-LOONGSON.性能测试表明,提出的方法可以提高大多数测试程序的性能,达到二进制翻译执行性能的3~5倍,并在TLB模拟方法的基础上提高了5%~16%的性能.展开更多
This article focuses on two English translations of Ji Yun＇s 纪昀 eigh- teenth-century collection of ＂stories of the strange,＂ Random Jottings at the Cottage of Close Scrutiny （Yuewei caotang biji 阅微草堂笔记）. ...This article focuses on two English translations of Ji Yun＇s 纪昀 eigh- teenth-century collection of ＂stories of the strange,＂ Random Jottings at the Cottage of Close Scrutiny （Yuewei caotang biji 阅微草堂笔记）. The translation done by Leo Tak-hung Chan is set within the context of his 1998 sinological monograph, while David Pollard＇s recent translation, published in 2014, stands as an edited volume of translation oriented toward the general reader. Referring to textual and paratextual elements in these two translations, I hope to show how the ＂setting＂ of a translation modulates its tone and message, which in turn unfolds with the selection, style and overall structure of the translation. I also draw from an actual dialog between Leo Chan and David Pollard, which evolves around the various aspects in translating Ji Yun＇s work and the more general issues in sinology and translating Chinese literature. The dialog between the two translators of Ji Yun further illustrates the translators＇ approaches to the original text, their mediating efforts toward crosscultural readability and literary felicity and specifically, how the state of mind of a translator might come into play with the ＂flavor＂ of a translation.展开更多
文摘内存虚拟化是系统虚拟化中如何有效抽象、利用、隔离计算机物理内存的重要方法,决定着系统虚拟化的整体性能.传统的纯软件内存虚拟化方法会产生较大的资源开销并且兼容性差,而硬件辅助的内存虚拟化方法需要重新设计处理器硬件架构.基于MIPS架构处理器提出一种软硬件协同的内存虚拟化方法,在不增加硬件支持的情况下提高内存虚拟化性能.提出的多层虚拟地址空间模型不仅可以解决MIPS架构处理器存在的虚拟化缺陷,而且可以在已有的内存虚拟化方法上提高性能.在多层虚拟地址空间模型的基础上,提出基于地址空间标识码(address space identity,ASID)、动态划分的旁路转换缓冲(translation lookaside buffer,TLB)共享方法,降低了虚拟机切换的开销.最终,在MIPS架构的龙芯3号处理器上实现了系统虚拟机VIRT-LOONGSON.性能测试表明,提出的方法可以提高大多数测试程序的性能,达到二进制翻译执行性能的3~5倍,并在TLB模拟方法的基础上提高了5%~16%的性能.
文摘This article focuses on two English translations of Ji Yun＇s 纪昀 eigh- teenth-century collection of ＂stories of the strange,＂ Random Jottings at the Cottage of Close Scrutiny （Yuewei caotang biji 阅微草堂笔记）. The translation done by Leo Tak-hung Chan is set within the context of his 1998 sinological monograph, while David Pollard＇s recent translation, published in 2014, stands as an edited volume of translation oriented toward the general reader. Referring to textual and paratextual elements in these two translations, I hope to show how the ＂setting＂ of a translation modulates its tone and message, which in turn unfolds with the selection, style and overall structure of the translation. I also draw from an actual dialog between Leo Chan and David Pollard, which evolves around the various aspects in translating Ji Yun＇s work and the more general issues in sinology and translating Chinese literature. The dialog between the two translators of Ji Yun further illustrates the translators＇ approaches to the original text, their mediating efforts toward crosscultural readability and literary felicity and specifically, how the state of mind of a translator might come into play with the ＂flavor＂ of a translation.
