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In Windows NT operating systems, the System Idle Process contains one or more kernel threads which run when no other runnable thread can be scheduled on a CPU. In a multiprocessor system, there is one idle thread associated with each CPU core. For a system with hyperthreading enabled, there is an idle thread for each logical processor.
Core processes (Windows NT) System Idle Process: SIP A counter which measures how much idle capacity the CPU has at any given time. The process runs in the background and monitors processing bandwidth, occupied memory and the Windows virtual paging file. Session Manager Subsystem: SMSS
The idle task can be hard-coded into the scheduler, or it can be implemented as a separate task with the lowest possible priority. An advantage of the latter approach is that programs monitoring the system status can see the idle task along with all other tasks; [citation needed] an example is Windows NT's System Idle Process.
Most operating systems execute a HLT instruction when there is no immediate work to be done, putting the processor into an idle state. In Windows NT, for example, this instruction is run in the "System Idle Process". On x86 processors, the opcode of HLT is 0xF4.
The System Idle Process is given process ID 0. The System Process is given the process ID 8 on Windows 2000 and 4 on Windows XP and Windows Server 2003. [13] On the Windows NT family of operating systems, process and thread identifiers are all multiples of 4, but it is not part of the specification. [14]
Windows NT processor scheduling refers to the process by which Windows NT determines which job (task) should be run on the computer processor at which time. Without scheduling, the processor would give attention to jobs based on when they arrived in the queue, which is usually not optimal.
The Client/Server Runtime Subsystem, or csrss.exe, is a component of the Windows NT family of operating systems that provides the user mode side of the Win32 subsystem.In modern versions of Windows, it is primarily involved with process and thread management, console window handling, side-by-side assembly loading and the shutdown process.
In computing, tasklist is a command available in Microsoft Windows [1] and in the AROS shell. [2] It is equivalent to the ps command in Unix and Unix-like operating systems and can also be compared with the Windows task manager . Windows NT 4.0, the Windows 98 Resource Kit, the Windows 2000 Support Tools, and ReactOS [3] include the similar ...