CSR--AES: VT-ASOS: Virtualization Technologies for Application-Specific Operating Systems on Many-Core HPC Systems

多核系统正在成为高性能计算领域的主流架构范例。随着核心数量的不断增加，有效的资源分配和跨应用程序和系统软件堆栈的可伸缩性变得至关重要。虚拟化可以解决这些挑战，同时提高针对这些平台的高性能软件开发的生产力。VT-ASOSproject增强了虚拟化技术，为并行应用程序提供封装和定制的硬件执行环境。我们使用一个模型，在这个模型中，包含并行应用程序的任务被封装在它们自己的运行时执行环境中。vt - asos由用户级运行时库和一个最小的客户操作系统组成，该操作系统知道应用程序的需求，并且只实现应用程序所需的功能。每个客户机内核都运行在增强型虚拟机监视器（VMM）之上，VMM做出资源管理决策，优化硬件资源分配给任务。VT-ASOS将支持特定于应用程序的系统配置、特定于应用程序的调度器和多核感知内存管理策略。监控基础设施利用硬件和软件来指导基础设施做出的决策。本研究使用Xen VMM和Linux作为测试平台。这项研究将改进虚拟化技术，减少虚拟化的开销，提高共享密集共享内存和多处理器资源的虚拟机之间的性能隔离。该项目的一个成果将是一组有限的、定义良好的可编程模块，用于将特定于应用程序的策略和机制插入虚拟机。

Many-core systems are emerging as the dominant architectural paradigm inhigh-performance computing. As the number of cores continues to increase,effective resource allocation and scalability across the applicationand system software stacks becomes paramount. Virtualization canaddress these challenges while simultaneously increasing productivity inhigh-performance software development for these platforms. The VT-ASOSproject augments virtualization technologies to provide encapsulatedand customized hardware execution environments for parallel applications.We use a model in which the tasks comprising a parallel applicationare encapsulated in their own runtime execution environment. VT-ASOSconsists of user-level runtime libraries, combined with a minimal, customguest operating system that knows the application''s requirementsand implements only the functionality that the application needs.Each guest kernel runs on top of an enhanced virtual machine monitor(VMM), which makes resource management decisions that optimize theassignment of hardware resources to tasks.VT-ASOS will support application-specific system configuration,application-specific schedulers, and many-core aware memory management policies. A monitoring infrastructure exploits hardware and software counterto guide the decisions made by the infrastructure.The research uses the Xen VMM and Linux as a testbed. This research will improve virtualization technologies, reducingthe overhead of virtualization and improving performance isolationbetween virtual machines sharing the resources of dense shared-memorymultiprocessors. An outcome of this project will be a limited andwell-defined set of programmable modules for plugging application-specificpolicies and mechanisms into virtual machines.