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Computer processor state
certain amount of processing time on the CPU. If the CPU has completed all tasks it is idle. Modern processors use idle time to save power. Common methods are
Idle_(CPU)
Kernel process in Windows NT operating systems
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_Idle_Process
Topics referred to by the same term
load Idle speed Idle (CPU), CPU non-utilisation or low-priority mode Synchronous Idle (SYN), the idle command to synchronize terminals System Idle Process
Idle
Production of waste heat by computer processors
applications, the CPU and other components are idle much of the time, so idle power contributes significantly to overall system power usage. When the CPU uses power
Processor_power_dissipation
Central computer component that executes instructions
A central processing unit (CPU), also known as a central processor, main processor, or simply processor, is the primary processor in a given computer
Central_processing_unit
Computer instruction which pauses execution
Advanced Power Management (APM) Computer architecture Halt and Catch Fire Idle (CPU) Instruction set architecture NOP (code) "Intel 64 and IA-32 Architectures
HLT_(x86_instruction)
Process scheduler in Linux
other idle core of a multicore CPU, then the other CPUs on the same NUMA node, then all busy hyperthreaded cores / SMT threads / logical CPUs to be preempted
Brain_Fuck_Scheduler
Resource limit method in Linux
freeze cgroup.kill cgroup.type cpu.idle cpu.max cpu.max.burst cpu.pressure cpu.uclamp.max cpu.uclamp.min cpu.weight cpu.weight.nice memory.current memory
Cgroups
optimizations to lower idle power consumption from 12W to 8W. ^d Note: The E4700 uses G0 Stepping which makes it a Conroe CPU. All models support: MMX
List of Intel Core desktop processors
List_of_Intel_Core_desktop_processors
Compositing window manager
that it was lightweight enough to run well on older hardware, with low idle CPU and RAM usage. However, it criticised the desktop left and right click
Enlightenment (window manager)
Enlightenment_(window_manager)
Distributed computing organization
effort that is attempting to solve large scale problems using otherwise idle CPU or GPU time. It is governed by Distributed Computing Technologies, Incorporated
Distributed.net
Eighth-generation Intel Core microprocessor family
processors introduced i5 and i7 CPUs featuring six cores (along with hyper-threading in the case of the latter) and Core i3 CPUs with four cores and no hyperthreading
Coffee_Lake
Type of operating system kernel
(tickless or dynamic tick) for idle CPUs using CONFIG_NO_HZ, and from 3.10 with CONFIG_NO_HZ_IDLE extended for non-idle processors with CONFIG_NO_HZ_FULL
Tickless_kernel
Power management technique in computers
formula indicates, and vice versa. ACPI 1.0 (1996) defines a way for a CPU to go to idle "C states", but defines no frequency-scaling system. ACPI 2.0 (2000)
Dynamic_frequency_scaling
Computer program whose performance is heavily dependent on the speed of the CPU
possible to visually see one component working while another was idle. Example components were CPU, tape drives, hard disks, card-readers, and printers. Computers
CPU-bound
Feature of the Solaris operating system
the boot process by starting multiple services simultaneously, allowing idle CPU time resulting from a service that is temporarily blocked to be relinquished
Service_Management_Facility
Series of systems-on-a-chip designed by Apple
2020. It is part of the Apple silicon series, as a central processing unit (CPU) and graphics processing unit (GPU), used for its Mac desktops and notebooks
Apple_M1
computing time to specific causes. The donated computing power comes from idle CPUs and GPUs in personal computers, video game consoles, and Android devices
List of volunteer computing projects
List_of_volunteer_computing_projects
Console audio player
the files themselves or from tags cache, either upon access or during idle CPU time. If the playlist has extended m3u information, that will be read as
Music_on_Console
Method by which work is assigned
possible to have computer multitasking with a single central processing unit (CPU). A scheduler may aim at one or more goals, for example: maximizing throughput
Scheduling_(computing)
Series of 16-bit computers by Texas Instruments
instructions The word specified the operation to be performed. IDLE (cpu idle) RSET (cpu reset) RTWP (return workspace pointer) CKON (clock on) CKOF (clock
TI-990
Component of computer engineering
CPU is idle. Conceptually, multithreading is equivalent to a context switch at the operating system level. The difference is that a multithreaded CPU
Microarchitecture
Remote desktop software
Intuos remoting on Linux to Linux connections. January 2019 7.6 Decreased idle CPU usage on Linux senders using HP3. Increased performance for AVC on Windows
Remote_Graphics_Software
Amount of computational work that a computer system performs
or waiting for CPU; i.e., the number of processes in the ready queue or run queue. An idle computer has a load number of 0 (the idle process is not counted)
Load_(computing)
Feature of IBM mainframe models
task over to an idle CPU for processing, even if that CPU must fetch data from slower main memory. HiperDispatch offers very little CPU savings benefit
HiperDispatch
Practice of decreasing the clock rate of a computer
step on CPU idle, whereas the Conservative governor increases the frequency step by step on CPU load and jumps to lowest frequency on CPU idle. The Performance
Underclocking
Computer firmware interface standard
Similarly, AMD Zen 2 CPUs diffentiate between C-states and P-states for the Core Complex and the Infinity Fabric. For describing the idle states of groupings
ACPI
Methodology to manage server I/O
loads that may overwhelm the server's channels, leading to backlogs and idle CPUs as they wait for data. Virtual I/O addresses performance bottlenecks by
I/O_virtualization
Method of improving instruction-level parallelism
pipelined computer, instructions travel through the central processing unit (CPU) in stages. For example, it might have one stage for each step of the von
Instruction_pipelining
Linux distribution based on Ubuntu, utilizing the Unity interface
review by John Perkins in Make Tech Easier faulted the release for its high idle CPU and RAM use, and noted, "the main thing that sticks out as a con to me
Ubuntu_Unity
Line of Intel microprocessors released in 2022
Intel identified a further issue in both microcode and BIOS code, where idling the CPU would request an overly high voltage and speed up aging. The physical
Raptor_Lake
BOINC Account Manager for volunteer computing projects
054\ 089\ 679\ 353\ 378^{3}+35\ 961\ 979\ 615\ 356\ 503^{3}.} "Spare Some Idle CPU Cycles For Charity This Season". TechCrunch. 23 December 2011. Retrieved
Charity_Engine
Idle detection system for computer power management
user's keystrokes. The technique was named Dynamic Idle Detection and includes halting, or stopping the CPU for periods of just a few microseconds until a
BatteryMAX
Computer program whose performance is heavily dependent on time spent waiting on I/O
are idle. Eventually, the CPU-bound process finishes its CPU burst and moves to an I/O device. All the I/O-bound processes, which have short CPU bursts
I/O_bound
Memory hierarchy concept applied to CPU caches with multiple levels
memory access speed. The gap between the speed of CPUs and memory meant that the CPU would often be idle. CPUs were increasingly capable of running and executing
Cache_hierarchy
Communication between an information processing system and the outside world
jam). In computer architecture, the combination of the CPU and main memory, to which the CPU can read or write directly using individual instructions
Input/output
Line of CPUs produced by Intel
(with the exception of Core Solo and Core 2 Solo) central processing units (CPUs) for midrange, embedded, workstation, high-end, enthusiast and gaming computer
Intel_Core
Operating system performance issue
lockout is the issue of performance degradation due to the idle wait times spent by the CPUs in kernel-level critical sections. Software lockout is a major
Software_lockout
Operating system designed to operate on multiple systems over a network computer
may have light to idle workloads. Load sharing and load balancing require many policy-oriented decisions, ranging from finding idle CPUs, when to move, and
Distributed_operating_system
Ability of a CPU to provide multiple threads of execution concurrently
resources would have been idle if only a single thread were executed. Also, if a thread cannot use all the computing resources of the CPU (because instructions
Multithreading (computer architecture)
Multithreading_(computer_architecture)
Use of widely distributed computer resources to reach a common goal
machines where the keyboard and mouse are idle to effectively harness wasted CPU power from otherwise idle desktop workstations. Like other full-featured
Grid_computing
Equal sharing of all resources by multiple identical processors
simultaneously from either CPU. Other mainframes that supported SMP included the UNIVAC 1108 II, released in 1965, which supported up to three CPUs, and the GE-635
Symmetric_multiprocessing
lowering the CPU clock multiplier, and thereby the processor core speed. In contrast, Thermal Monitor 1 inserts an idle cycle into the CPU for thermal
Thermal_Monitor_2
Feature of computer systems
central processing unit (CPU). Without DMA, programmed input–output must be used to transfer data which typically fully occupies the CPU for the entire duration
Direct_memory_access
API for power management in IBM-compatible computers
Vista. The Linux kernel still mostly supports APM, though support for APM CPU idle was dropped in version 3.0. APM uses a layered approach to manage devices
Advanced_Power_Management
Subset of x86 instruction set architecture for floating-point arithmetic
stopped. The second one operates automatically when the CPU is running, putting the 387SL into "idle mode" when it is not executing an instruction. When active
X87
Computer workstation
Elite3D graphics, one disk) draws about 200 watts when idle. Remove 2nd video card and 2nd CPU. The Ultra 60 is a well-built workstation. It does not
Ultra_60
Intel microprocessor series released in 2023
for laptops in idle or sleep mode. All deep background tasks being handled by two Crestmont E-cores in the SoC tile allows the inactive CPU tile to be turned
Meteor_Lake
2020 AMD 7-nanometer processor microarchitecture
Zen 3 is the name for a CPU microarchitecture by AMD, released on November 5, 2020. It is the successor to Zen 2 and uses TSMC's 7 nm process for the
Zen_3
Instruction for x86 microprocessors
opcode) is a processor supplementary instruction (its name derived from "CPU Identification") allowing software to discover details of the processor.
CPUID
Period when a computer system is available
spent idle, in seconds. On multi-core systems (and some Linux versions) the second number is the sum of the idle time accumulated by each CPU. The C
Uptime
Cisco router emulator
CPU capacity, because it emulates a router’s CPU instruction-by-instruction. It initially has no way of knowing when the virtual router’s CPU is idle
Dynamips
Feature of some electrical appliances
and Power Interface (ACPI) Hibernate Sleep BatteryMAX (idle detection) Constant Awake Mode CPU power dissipation Dynamic frequency scaling Dynamic voltage
Power_management
Storage of digital data readable by computers
unit (CPU) consists of two main parts: The control unit and the arithmetic logic unit (ALU). The former controls the flow of data between the CPU and memory
Computer_data_storage
American supercomputer
an idle power of about 100 W and a thermal design power (TDP) of about 500 W and 560 W at peak. Frontier has coherent interconnects between CPUs and
Frontier_(supercomputer)
leaves the channel idle only when there are no packets to transmit. In contrast, a non-work-conserving scheduler might leave the channel idle with packets still
Work-conserving_scheduler
Computing paradigm to improve computational efficiency
instruction scheduling paradigm used in high-performance central processing units (CPUs) to make use of instruction cycles that would otherwise be wasted. In this
Out-of-order_execution
Mainframe computer by Control Data
The 6600 CPU also had an instruction stack, a kind of instruction cache, which helped increase CPU throughput by reducing the amount of CPU idle time caused
CDC_6600
Series of low-cost single-board computers
February 2015 with the Raspberry Pi 2, which featured a 900 MHz quad-core CPU and 1 GB of RAM. Following its release, the price of the Model B+ was lowered
Raspberry_Pi
Microarchitecture by AMD
(Excavator) supports AVX2 instruction sets. According to AMD, Bulldozer-based CPUs are based on GlobalFoundries' 32 nm Silicon on insulator (SOI) process technology
Bulldozer_(microarchitecture)
Windows specification for power management
cooling on standby Trusted Platform Module 2.0 CPU, chipset and BIOS support for S0ix "Low Power S0 Idle" power state All peripheral devices and drivers
Modern_Standby
Number used by operating system kernels to identify an active process
process that runs on a CPU core whenever that CPU core has nothing else to do. Linux also calls the threads of this process idle tasks. In some APIs, PID
Process_identifier
Microprocessor model
impossible to avoid idling the EU in the 8088 at least 1⁄4 of the time while executing useful real-world programs, and it is not hard to idle it half the time
Intel_8088
Component of a computer's CPU
The usual method reduces the CPU's clock rate. Most computer systems use this method. It is common for a CPU to idle during the transition to avoid
Control_unit
interfering with the CPU. It is similar to direct memory access (DMA) for allowing I/O controllers to read or write RAM without CPU intervention. Clever
Cycle_stealing
Computer energy efficiency
computers often pick CPUs based on their performance per watt, because the cost of powering the CPU outweighs the cost of the CPU itself. Spaceflight computers
Performance_per_watt
Type of computer communication interface
served the same function for competing AMD CPUs. Both typically carry data between the central processing unit (CPU) and a memory controller hub, known as
Front-side_bus
Power saving mode of modern processors by Advanced Micro Devices
AMD Cool'n'Quiet is a CPU dynamic frequency scaling and power saving technology introduced by AMD with its Athlon XP processor line. It works by reducing
Cool'n'Quiet
Software that show processor-related statistics
CPU machine: Linux 4.14.24.mptcp (hostname) 05/23/2018 _x86_64_ (2 CPU) 03:51:19 PM CPU %usr %nice %sys %iowait %irq %soft %steal %guest %gnice %idle
Mpstat
Computer application of Microsoft Windows
the scheduler, which is a core component of the OS kernel that allocates CPU resources to processes already running. Task Scheduler 1.0 is included with
Windows_Task_Scheduler
Processor microarchitecture
competitive performance, making it unsuitable for the shift to dual/multi-core CPUs. On May 7, 2004, Intel confirmed the cancellation of the next NetBurst, Tejas
Intel Core (microarchitecture)
Intel_Core_(microarchitecture)
Series of microprocessors by AMD
Energy savings were achieved by lowering the CPU, GPU and northbridge voltages, reducing the idle clocks of the CPU and GPU as well as introducing a hardware
AMD_APU
Power management of personal computer hardware
Windows uses a combination of user activity and CPU activity to determine when the computer is idle. Applications can temporarily inhibit this timer
PC_power_management
Type of buck convertor for regulation
the same power supply unit for CPUs with different nominal supply voltages and to reduce power consumption during idle periods by lowering the supply
Voltage_regulator_module
Type of computer memory
cost. Typically, SRAM is used for the cache and internal registers of a CPU while DRAM is used for a computer's main memory. Semiconductor bipolar SRAM
Static_random-access_memory
processor cores (8) was unchanged, its CPU clock speed increased from 1.6 GHz to 2.13 GHz (a 33.1% improvement in CPU core clock rate), but with the underlying
PlayStation 4 technical specifications
PlayStation_4_technical_specifications
Particular execution of a computer program
method to allow multiple processes to share processors (CPUs) and other system resources. Each CPU (core) executes a single process at a time. However, multitasking
Process_(computing)
Computer hardware device
circuit needs to be added externally. A UART frame consists of five elements: Idle (logic high (1)) Start bit (logic low (0)): the start bit signals to the
Universal asynchronous receiver-transmitter
Universal_asynchronous_receiver-transmitter
Family of single board computer models
motherboard utilizes the AllWinner A10 capabilities SoC: AllWinner A10 CPU: Cortex-A8 @ 1 GHz CPU, GPU Mali-400 MP video acceleration: CedarX able to decode 2160p
Cubieboard
17 × 17 cm motherboard
boards use their x86-compatible CPUs — the C3, C7 or low-power Eden variants, with newer boards featuring the VIA Nano CPU, launched in May 2008. Other manufacturers
Mini-ITX
High-throughput computing software
Each workstation runs a daemon that watches user I/O and CPU load. When a workstation has been idle for two hours, a job from the batch queue is assigned
HTCondor
Operating system feature to reduce CPU idle time
minimizing the number of times the CPU is forced to perform the relatively power-costly operation of entering and exiting idle states. The Linux kernel gained
Timer_coalescing
Family of Intel microprocessors
states allow the CPU to better throttle clock speed to suit conditions. The power requirements of the Pentium M varies from 5 watts when idle to 27 watts at
Pentium_M
download and run a software client and donate some idle capacity of their computer processing unit (CPU). The gathered computing power was used to search
Gstock
Software for calculating the bits of Pi
Colin Percival to calculate specific bits of π. 1,246 contributors used idle time slices on almost two thousand computers[citation needed] to make its
PiHex
Software framework for heterogeneous computing systems
processor (set) to each subtask, leaving other types of processors idle. In other words, the CPU(s) run (possibly in parallel), then when that subtask completes
Simultaneous and heterogeneous multithreading
Simultaneous_and_heterogeneous_multithreading
in function to Intel's Platform Controller Hub. It communicates with the CPU using the UMI interface. Secure Digital: Supports SDHC up to 32 GB, 4 pins
List_of_AMD_chipsets
Scrubbing of computer memory
regular memory requests from the CPU and thus prevent decreasing performance, scrubbing is usually only done during idle periods. As the scrubbing consists
Memory_scrubbing
Eden microprocessors from VIA Technologies are fifth- and sixth-generation CPUs targeted at the embedded market. All models support: MMX, 3DNow! All models
List of VIA Eden microprocessors
List_of_VIA_Eden_microprocessors
Supercomputer platform
Before and during the console's production lifetime, its powerful IBM Cell CPU attracted interest in using multiple, networked PS3s for affordable high-performance
PlayStation_3_cluster
Filesystem in Unix-like operating systems
"siblings" = (HT per CPU package) * (# of cores per CPU package) "cpu cores" = (# of cores per CPU package) A CPU package means physical CPU which can have
Procfs
Family of Intel microprocessors
which is the dual-core variant of the Pentium 4 manufactured by Intel. Each CPU comprised two cores. The brand's first processor, codenamed Smithfield and
Pentium_D
Australian physician
particularly reducing I/O impact. Kolivas is most notable for his work with CPU scheduling, most significantly his implementation of "fair scheduling", which
Con_Kolivas
Family of ARM processor cores for consumer devices
requirements. The C1-series was introduced in September 2025 and is the first CPU family built on the Armv9.3 architecture. This architecture includes native
ARM_C-series
Proprietary simultaneous multithreading implementation by Intel
then, Intel has included this technology in Itanium, Atom, and Core series CPUs, among others. For each processor core that is physically present, the operating
Hyper-threading
Line of discontinued microprocessors made by Intel
computers, manufactured by Intel from 1998 to 2023. The first Celeron-branded CPU was introduced on April 15, 1998, and was based on the Pentium II. From 2009
Celeron
idle. If it is fed a data intensive program like a database job, the floating point units will lie idle while the integer units bog. In a TRIPS CPU every
TRIPS_architecture
Game that has no sentient players
with no interaction from the player. Incremental games, sometimes called idle games or clicker games, are games which do require some player intervention
Zero-player_game
Family of AMD multi-core 45 nm processors
chipset and Radeon HD 4800 series graphics. The Thuban Phenom II X6 is the CPU in the Leo Platform which also includes the AMD 890 chipset and the Radeon
Phenom_II
Data structure maintained by job scheduler software containing jobs to run
utilization of expensive computing resources Any process that comes to the CPU should wait in a queue. Command pattern Job scheduler Priority queue Task
Job_queue
IDLE CPU
IDLE CPU
IDLE CPU
IDLE CPU
IDLE CPU
IDLE CPU
IDLE CPU
IDLE CPU
IDLE CPU