context switch

Step three: the write system call causes a context switch from user mode to kernel mode.

步骤三：系统调用write导致从用户空间到内核空间的上下文切换。

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To minimize the cost of a virtual processor context switch, the operating system indicates to the hypervisor whether some resources are in use.

为了实现虚拟处理器上下文切换成本的最小化，操作系统将告诉Hypervisor是否正在使用某些资源。

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A rapid context switch mechanism for multithread: parallel multiple contexts mechanism

一种支持多线索快速切换的上下文机制：多上下文并行机制

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Processes in Erlang are assumed to be small in memory, fast to start, and fast to context-switch.

Erlang中的进程内存较小，可快速启动和进行上下文切换。

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The send() system call returns, creating the fourth context switch.

send（）系统调用返回，结果导致了第四次的上下文切换。

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There is an important context switch that deserves a little more attention.

有一个重要的环境转变值得注意。

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Step four: the write system call returns, creating our fourth context switch.

步骤四：系统调用返回，导致了第4次上下文切换。

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The interrupt latency and context switch latency of Linux were measured and analysed to manifest the real-time performance of Linux in special platform, providing the datum when Linux was used as embedded operation system.

在特定平台上对Linux的实时性重要指标：中断响应和上下文切换开销加以测试并分析，为Linux嵌入式中的实时应用提供了依据。

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Experiment results show that the interrupt latency of Linux is influenced by kernel mechanism and memory management mechanism, and the context switch latency of Linux is influenced by process space of Linux and hardware.

Linux中断响应与Linux内核机制和内存管理机制紧密相关，而Linux上下文切换开销与Linux进程空间和硬件平台情况紧密相关。

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Describe actions taken by a kernel to context-switch between processes.

请描述一下内核和上下文转换两个进程之间的转换过程.

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If the new thread is a different process, there is a context switch too.

如果新线程属于另外的进程, 这个操作将引起上下文切换.

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