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- System_Idle_Process abstract "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. The primary purpose of the idle process and its threads is to eliminate what would otherwise be a special case in the scheduler. Without the idle threads, there could be cases when no threads were runnable (or \"Ready\" in terms of Windows scheduling states). Since the idle threads are always in a Ready state (if not already Running), this can never happen. Thus whenever the scheduler is called due to the current thread leaving its CPU, another thread can always be found to run on that CPU, even if it is only the CPU's idle thread. The CPU time attributed to the idle process is therefore indicative of the amount of CPU time that is not needed or wanted by any other threads in the system. The scheduler treats the idle threads as special cases in terms of thread scheduling priority. The idle threads are scheduled as if they each had a priority lower than can be set for any ordinary thread. Because of the idle process's function, its CPU time measurement (visible through, for example, Windows Task Manager) may make it appear to users that the idle process is monopolizing the CPU. However, the idle process does not use up computer resources (even when stated to be running at a high percent). Its CPU time \"usage\" is a measure of how much CPU time is not being used by other threads. In Windows 2000 and later the threads in the System Idle Process are also used to implement CPU power saving. The exact power saving scheme depends on the operating system version and on the hardware and firmware capabilities of the system in question. For instance, on x86 processors under Windows 2000, the idle thread will run a loop of halt instructions, which causes the CPU to turn off many internal components until an interrupt request arrives. Later versions of Windows implement more complex CPU power saving methods. On these systems the idle thread will call routines in the Hardware Abstraction Layer to reduce CPU clock speed or to implement other power-saving mechanisms.There are more detailed sources of such information available through Windows' performance monitoring system (accessible with the perfmon program), which includes more finely grained categorization of CPU usage. A limited subset of the CPU time categorization is also accessible through the Task Manager, which can display CPU usage by CPU, and categorized by time spent in user vs. kernel code.".
- System_Idle_Process wikiPageID "1277011".
- System_Idle_Process wikiPageLength "3842".
- System_Idle_Process wikiPageOutDegree "22".
- System_Idle_Process wikiPageRevisionID "706829971".
- System_Idle_Process wikiPageWikiLink Category:Windows_NT_architecture.
- System_Idle_Process wikiPageWikiLink Central_processing_unit.
- System_Idle_Process wikiPageWikiLink David_A._Solomon.
- System_Idle_Process wikiPageWikiLink Firmware.
- System_Idle_Process wikiPageWikiLink HLT.
- System_Idle_Process wikiPageWikiLink Hardware_abstraction.
- System_Idle_Process wikiPageWikiLink Hyper-threading.
- System_Idle_Process wikiPageWikiLink Idle_(CPU).
- System_Idle_Process wikiPageWikiLink Interrupt_request_(PC_architecture).
- System_Idle_Process wikiPageWikiLink List_of_Microsoft_Windows_components.
- System_Idle_Process wikiPageWikiLink Microsoft_Windows.
- System_Idle_Process wikiPageWikiLink Process_Explorer.
- System_Idle_Process wikiPageWikiLink Subset.
- System_Idle_Process wikiPageWikiLink Task_Manager_(Windows).
- System_Idle_Process wikiPageWikiLink Thread_(computing).
- System_Idle_Process wikiPageWikiLink Windows_NT.
- System_Idle_Process wikiPageWikiLink Windows_XP.
- System_Idle_Process wikiPageWikiLink X86.
- System_Idle_Process wikiPageWikiLinkText "System Idle Process".
- System_Idle_Process caption "Windows Task Manager in Windows XP showing System Idle Process usage at 99%, indicating that no other process is running in the CPU.".
- System_Idle_Process includedWith "Windows NT-based operating systems".
- System_Idle_Process name "System Idle Process".
- System_Idle_Process screenshot "System idle process.png".
- System_Idle_Process type "Kernel".
- System_Idle_Process wikiPageUsesTemplate Template:Cite_book.
- System_Idle_Process wikiPageUsesTemplate Template:Infobox_Windows_component.
- System_Idle_Process wikiPageUsesTemplate Template:Multiple_issues.
- System_Idle_Process wikiPageUsesTemplate Template:No_footnotes.
- System_Idle_Process wikiPageUsesTemplate Template:Primary_sources.
- System_Idle_Process wikiPageUsesTemplate Template:Refimprove.
- System_Idle_Process wikiPageUsesTemplate Template:Windows_Components.
- System_Idle_Process subject Category:Windows_NT_architecture.
- System_Idle_Process type Redirect.
- System_Idle_Process comment "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. The primary purpose of the idle process and its threads is to eliminate what would otherwise be a special case in the scheduler.".
- System_Idle_Process label "System Idle Process".
- System_Idle_Process sameAs Q2028854.
- System_Idle_Process sameAs Proceso_inactivo_de_sistema.
- System_Idle_Process sameAs 시스템_유휴_프로세스.
- System_Idle_Process sameAs m.04pgk8.
- System_Idle_Process sameAs පද්ධති_අලස_ක්රියාවලිය.
- System_Idle_Process sameAs Q2028854.
- System_Idle_Process wasDerivedFrom System_Idle_Process?oldid=706829971.
- System_Idle_Process isPrimaryTopicOf System_Idle_Process.