When a user program accesses system calls, it does so in kernel mode, not user mode.
当用户程序访问系统调用时，它将在内核模式而不是用户模式下进行。
Where vanilla kernels support kernel mode and user mode, the KVM introduces a guest mode.
普通内核支持内核模式和用户模式，而KVM则引入了一种客户模式。
Regarding system modes, there are two modes that a CPU operates in: kernel mode and user mode.
在系统模式方面，CPU有两种运行模式：内核模式和用户模式。
Recall that kernel mode represents the privileged mode for code execution, while user mode represents the non-privileged mode (for programs running outside the kernel).
回想一下内核模式表示代码执行的特权模式，而用户模式则表示非特权模式（用于那些运行在内核之外的程序）。
Reduces kernel mode time and increases user mode time.
减少内核模式时间，增加用户模式时间。
The send socket call causes a context switch from user mode to kernel mode.
send套接字调用引发了从用户模式到内核模式的上下文切换。
Step one: the read system call causes a context switch from user mode to kernel mode.
read() 调用（参见 图 2）引发了一次从用户模式到内核模式的上下文切换。
Step three: the write system call causes a context switch from user mode to kernel mode.
send() 套接字调用引发了从用户模式到内核模式的上下文切换。
The read call causes a context switch (see Figure 2) from user mode to kernel mode.
read调用(参见图2)引发了一次从用户模式到内核模式的上下文切换。
Within guest mode are the standard two modes, so that a guest operating system runs in guest mode but supports the standard kernel and user modes for its kernel and user-space applications.
在客户模式中有两种标准模式，因此客户操作系统在客户模式中运行可以支持标准的内核，而在用户模式下运行则支持自己的内核和用户空间应用程序。
How processor is switched from user mode to kernel mode?
如何处理从用户模式内核模式？
VI Architecture (VIA) reduces the communication overhead by eliminating the context switch between the user mode and the kernel mode and using the application space as the network data buffer .
通过消除数据传输过程中用户态和核心态之间上下文切换、将应用程序空间直接作为网络数据缓存来降低通信开销。
We also discuss how to communicate between user mode and kernel mode under environment of WIN2K.
以及在WIN2K环境下，用户程序是如何与核心层驱动程序进行通话的。
Semi-kernel mode malware runs in both user mode and kernel mode.
运行于完全内核模式的恶意软件在内核层执行所有任务。
According to the isolation positions of device drivers, the device driver framework can be classified into three types: kernel mode driver, user mode driver and virtual machine based driver.
目前，对设备驱动可靠性的研究着重于设备驱动与操作系统内核的有效分离，设备驱动框架按照驱动被隔离所处位置大致可分为内核态、用户态和虚拟机三种。
Process 1 then resumes execution in User Mode until a timer interrupt occurs, and the scheduler is activated in Kernel Mode.
然后，直到发生定时器中断且调度程序在内核态被激活，进程1才恢复在用户态下执行。
Chapter 1 described how user-mode code can request an OS service by trapping into kernel mode.
第一章讲了用户模式代码是如何通过陷入内核模式来使用系统服务的。
Describes the physical hardware in the computer, the way device drivers use that hardware, and mappings and related data that link kernel-mode drivers with user-mode code.
描述在电脑中的实体硬体、装置驱动程序使用该硬体的方法，以及连结核心模式驱动程序和使用者模式程序码之对应和相关的资料。
Describes the physical hardware in the computer, the way device drivers use that hardware, and mappings and related data that link kernel-mode drivers with user-mode code.
描述在电脑中的实体硬体、装置驱动程序使用该硬体的方法，以及连结核心模式驱动程序和使用者模式程序码之对应和相关的资料。
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