手臂虚拟化

Chris Dall, Shih-wei Li, J. Lim, Jason Nieh
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引用次数: 0

摘要

ARM服务器正变得越来越普遍,这使得服务器技术(如面向ARM的虚拟化)变得越来越重要。我们首次对服务器硬件上的ARM虚拟化性能进行了研究,包括对两种流行的ARM和x86管理程序KVM和Xen的多核测量。我们展示了ARM硬件对虚拟化的支持如何能够更快地实现虚拟机和虚拟机管理程序(一个关键的虚拟机管理程序操作)之间的转换。然而,当前的管理程序设计,包括类型1管理程序(如Xen)和类型2管理程序(如KVM),都不能在ARMv8.0上利用这种性能优势来处理实际的应用程序工作负载。我们将讨论其中的原因,并说明与管理程序软件设计和实现相关的其他因素在总体性能中发挥更大的作用。根据我们的测量,我们讨论了软件变化和新的硬件特性,即ARMv8.1中添加的虚拟化主机扩展(Virtualization Host Extensions, VHE),它弥补了这一差距,并将ARM更快的虚拟机到虚拟机管理程序的转换机制引入了运行实际应用程序的现代Type 2虚拟机管理程序。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
ARM Virtualization
ARM servers are becoming increasingly common, making server technologies such as virtualization for ARM of growing importance. We present the first study of ARM virtualization performance on server hardware, including multi-core measurements of two popular ARM and x86 hypervisors, KVM and Xen. We show how ARM hardware support for virtualization can enable much faster transitions between VMs and the hypervisor, a key hypervisor operation. However, current hypervisor designs, including both Type 1 hypervisors such as Xen and Type 2 hypervisors such as KVM, are not able to leverage this performance benefit for real application workloads on ARMv8.0. We discuss the reasons why and show that other factors related to hypervisor software design and implementation have a larger role in overall performance. Based on our measurements, we discuss software changes and new hardware features, the Virtualization Host Extensions (VHE), added in ARMv8.1 that bridge the gap and bring ARM's faster VM-to-hypervisor transition mechanism to modern Type 2 hypervisors running real applications.
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