操作系统(Operating System,简称OS,港台译作「作业系统」)是管理计算机硬件与软件资源的程序,同时也是计算机系统的核心与基石。操作系统的型态非常多样,不同机器安装的操作系统可从简单到复杂,可从手机的嵌入式系统到超级计算机的大型操作系统。

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本课程是为那些想要了解操作系统的设计与实现的本科生而设。

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最新论文

In High Performance Computing, systems are evaluated based on their computational throughput. However, performance in contemporary server processors is primarily limited by power and thermal constraints. Ensuring operation within a given power envelope requires a wide range of sophisticated control mechanisms. While some of these are handled transparently by hardware control loops, others are controlled by the operating system. A lack of publicly disclosed implementation details further complicates this topic. However, understanding these mechanisms is a prerequisite for any effort to exploit the full computing capability and to minimize the energy consumption of today's server systems. This paper highlights the various energy efficiency aspects of the AMD Zen 2 microarchitecture to facilitate system understanding and optimization. Key findings include qualitative and quantitative descriptions regarding core frequency transition delays, workload-based frequency limitations, effects of I/O die P-states on memory performance as well as discussion on the built-in power monitoring capabilities and its limitations. Moreover, we present specifics and caveats of idle states, wakeup times as well as the impact of idling and inactive hardware threads and cores on the performance of active resources such as other cores.

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