Userland routing also forces at least two context switches.
用户空间路由还强制进行至少两次上下文切换。
At run time, ConTest sometimes tries to cause context switches in these places.
在运行时，ConTest有时试图在这些位置引起上下文转换。
This ioctl() call is responsible for doing context switches between guest OS and host OS.
这个 ioctl() 调用负责进行客户 OS 与宿主 OS 之间的上 下文切换。
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