操作系统第四节课20210322

操作系统课堂讨论

 第三条：有两种方式，一种直接基于windows的，还有基于Linux的。

共有云：公有云通常指第三方提供商为用户提供的能够使用的云，公有云一般可通过 Internet 使用，可能是免费或成本低廉的，公有云的核心属性是共享资源服务。这种云有许多实例，可在当今整个开放的公有网络中提供服务。

虚拟化层次：不管虚拟机，还是容器，还是JVM的跨平台，只是计算机不同层级结构间的虚拟化运用。

 fork()、vfork()、clone()的区别：

 进程调度

PCB：进程控制块

PCB从一个队列中到另一个队列中。

狭义的调度：选择一个到CPU上运行。

I/O调度：

 

 CPU利用率

吞吐量

 一个进程的周转时间

 响应时间

 实时调度

 

参考链接：https://baike.baidu.com/item/%E5%85%AC%E6%9C%89%E4%BA%91/7845590?fr=aladdin

https://blog.csdn.net/weixin_34416754/article/details/91686805

 https://blog.csdn.net/gogokongyin/article/details/51178257

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