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computing, interrupt latency refers to the delay between the start of an Interrupt Request (IRQ) and the start of the respective Interrupt Service Routine
Interrupt_latency
Small computer on a single integrated circuit
systems often seek to optimize interrupt latency over instruction throughput. Issues include both reducing the latency, and making it be more predictable
Microcontroller
Computer operating system for applications with critical timing constraints
applications. Key factors in a real-time OS are minimal interrupt latency and minimal thread switching latency; a real-time OS is valued more for how quickly or
Real-time_operating_system
Family of computer interrupt controllers
Inter-processor interrupt (IPI) Interrupt Interrupt handler Interrupt latency Message Signaled Interrupts (MSI) Non-maskable interrupt (NMI) "MultiProcessor
Advanced Programmable Interrupt Controller
Advanced_Programmable_Interrupt_Controller
Hardware signal sent to a processor to interrupt a running program and handle input
Interrupts". Coleman, James (2009). "Results, Workstation Class Platform". Reducing Interrupt Latency Through the Use of Message Signalled Interrupts
Interrupt_request
Signal to a computer processor emitted by hardware or software
In digital computers, an interrupt is a request for the processor to interrupt currently executing code (when permitted), so that the event can be processed
Interrupt
Switch between processes or tasks on a computer
latency. The time to switch between two threads of the same process is called the thread switching latency. The time from when a hardware interrupt is
Context_switch
Time delay between an input and a response
experience some sort of latency, regardless of the nature of the stimulation to which it has been exposed. The precise definition of latency depends on the system
Latency_(engineering)
Group of 32-bit RISC processor cores
(TCM): Low-latency (zero wait state) SRAM that can be used to hold the call stack, RTOS control structures, interrupt data structures, interrupt handler
ARM_Cortex-M
Type of computer hardware interrupt
supported up to 224 MSI-based interrupts. According to a 2009 Intel benchmark using Linux, using MSI reduced the latency of interrupts by a factor of almost three
Message_Signaled_Interrupts
Integrated circuit that handles interrupts
from Intel OpenPIC and IBM MPIC Inter-processor interrupt (IPI) Interrupt latency Non-maskable interrupt (NMI) IRQL (Windows) "Intel® 64 and IA-32 Architectures
Programmable interrupt controller
Programmable_interrupt_controller
Hardware interrupt that cannot be ignored
(APIC) Inter-processor interrupt (IPI) Interrupt Interrupt handler Interrupt latency Programmable Interrupt Controller (PIC) "Interrupt Levels". Retrieved
Non-maskable_interrupt
Computer hardware device
the interrupt. This increases the maximum bit rate the computer can process reliably from 9600 to 153,000 bit/s if it has a 1 millisecond interrupt dead
Universal asynchronous receiver-transmitter
Universal_asynchronous_receiver-transmitter
ARM CPU architecture feature (FIQ)
helps reduce interrupt latency as the interrupt service routine can be executed directly without determining the source of the interrupt. A context save
Fast_interrupt_request
Computer systems programming special block code
needed] Interrupt vector table Advanced Programmable Interrupt Controller (APIC) Inter-processor interrupt (IPI) Interrupt latency Interrupts in 65xx
Interrupt_handler
Set of rules describing computer system
processor usually makes latency worse, but makes throughput better. Computers that control machinery usually need low interrupt latencies. These computers operate
Computer_architecture
resume execution at the instruction immediately following WAI. Hence interrupt latency will be very short (70 nanoseconds at 14 megahertz), resulting in
Interrupts_in_65xx_processors
Using software instead of dedicated hardware to process and make use of signals
data lines which precludes other processing. Also, unless hardware interrupt latency is uniform such as in early models of Atmel PICs, and other guarantees
Bit_banging
Algorithm in a thread whose failure cannot cause another thread to fail
to have bounded (and preferably short) running time, or excessive interrupt latency may be observed. A lock-free data structure can be used to improve
Non-blocking_algorithm
Programmable interrupt controller
1986 Advanced Programmable Interrupt Controller (APIC) IF (x86 flag) Interrupt handler Interrupt latency Non-maskable interrupt (NMI) "Intel datasheet".
Intel_8259
Concept in computer programming
that re-enables interrupts early in the interrupt handler. This may reduce interrupt latency. In general, while programming interrupt service routines
Reentrancy_(computing)
Line of single-chip microprocessors from Microchip Technology
instruction cycle jitter. Internal interrupts are already synchronized. The constant interrupt latency allows PICs to achieve interrupt-driven low-jitter timing
PIC_microcontrollers
Technique in which events which would normally trigger a hardware interrupt are held back
technique can reduce interrupt load by up to an order of magnitude, while only incurring relatively small latency penalties. Interrupt coalescing is typically
Interrupt_coalescing
Formally verified capability-based microkernel
interrupt events to user-space device drivers or to signal state changes between components, supporting a microkernel architecture in which interrupt
SeL4
Instruction set architecture
extension) has been developed to extend the interrupt controller support, reduce the interrupt latency and enhance the I/O peripheral control function
MIPS_architecture
useful in trying to balance system throughput versus interrupt latency. Some kinds of interrupts need to be responded to more quickly than others, but
Interrupt_priority_level
OS hardware Bugs
account how fast the buffer may fill between interrupts, and the interrupt latency between the interrupt and the transfer of the buffer to the system
Interrupt_storm
Time a given technological system takes to respond to an input
expensive monitors or monitors that have a higher resolution. Latency (engineering) Interrupt latency Application Response Measurement Wescott, Bob (2013). The
Response_time_(technology)
Study of hardware and software systems that have a "real-time constraint"
Compared to these, the programmable interrupt controller of the Intel x86 family of CPUs generates a very large latency and the Windows operating system
Real-time_computing
Task of creating a processor
guarantee worst-case response. That is easier to do when the CPU has low interrupt latency and when it has deterministic response. (DSP) Computer programmers
Processor_design
Programmable Interrupt Controller (APIC) OpenPIC and IBM MPIC Inter-processor interrupt (IPI) Interrupt latency Non-maskable interrupt (NMI) IRQL (Windows)
End_of_interrupt
Layer of hardware-level instructions or data structures
a very long time to execute. Such variations interfere with both interrupt latency and, what is far more important in modern systems, pipelining. When
Microcode
Distributed operating system
context switching, network, application startup time, load, frame loss, interrupt latency, etc., and also performance optimised in smart routers and smart vehicles
HarmonyOS_5
8/16-bit microprocessor
minimal code. Wait-for-Interrupt (WAI) and Stop-the-Clock (STP) instructions further reduce power consumption, decrease interrupt latency and allow synchronization
WDC_65C816
timestamp with sufficient accuracy (e.g., due to factors such as variable interrupt latency or data arriving faster than it can be processed). In such cases,
FIFO_(electronic)
Amount of useful work accomplished by a computer
input distribution. Latency is a time delay between the cause and the effect of some physical change in the system being observed. Latency is a result of the
Computer_performance
Computer expansion bus standard
2008. Retrieved 7 December 2007. "Reducing Interrupt Latency Through the Use of Message Signaled Interrupts" (PDF). PCI Express Base Specification, Revision
PCI_Express
Instruction set architecture by Hitachi
pipelines. It also incorporates 15 register banks to facilitate an interrupt latency of 6 clock cycles. It is also strong in motor control application
SuperH
CMOS microprocessor in the 6502 family
processed. WAit-for-Interrupt (WAI) and SToP (STP, stop-the-clock) instructions reduce power consumption, decrease interrupt latency and enable synchronization
WDC_65C02
Microsoft Windows operating system mechanism
operating system mechanism which allows high-priority tasks (e.g. an interrupt handler) to defer required but lower-priority tasks for later execution
Deferred_Procedure_Call
Discontinued embedded operating system by Microsoft
definition of a real-time operating system, with a deterministic interrupt latency. From Version 3 and onward, the system supports 256 priority levels
Windows_CE
First 640 KB of RAM under DOS
undocumented internal registers on the 80286, significantly improving interrupt latency by avoiding repeated real mode/protected mode switches. Windows installs
Conventional_memory
Operating system
Quark features include: High super/usermode switch speed Low interrupt latency Interrupt threads (IntThreads) and Int P-code abstraction Symmetric multiprocessing
Quark_(kernel)
Hardware component that connects a computer to a network
that generated the interrupts. This technique improves locality of reference and results in higher overall performance, reduced latency and better hardware
Network_interface_controller
Microprocessor by Intersil
cycle and returns take zero. It also has a very low and consistent interrupt latency of only four processor cycles, which lends it well to realtime applications
Harris_RTX_2000
Family of second-generation microkernels
exception of extremely short atomic operations) to achieve a low interrupt latency. This was considered necessary because L4/Fiasco is used as the basis
L4_microkernel_family
Software that manages computer hardware resources
movement generates an interrupt called Interrupt-driven I/O. An interrupt-driven I/O occurs when a process causes an interrupt for every character or
Operating_system
Discontinued modular real-time multiuser multitasking operating system
higher portability across hardware platforms, and it featured very low interrupt latency and fast context switching. The original protected mode FlexOS 286
FlexOS
Computer instruction which pauses execution
most processors, halting (instead of looping) also reduces the latency of the next interrupt. Since issuing the HLT instruction requires ring 0 access, it
HLT_(x86_instruction)
Implementation of the Precision Time Protocol
participating machines. When IEEE 1588 packets are timestamped in software, interrupt latency, OS scheduling, and other software issues reduce the accuracy of the
PTPd
RISC machines, with very compact code. Another benefit was that the interrupt latencies were very small, smaller than most CISC machines (a rare trait in
History of general-purpose CPUs
History_of_general-purpose_CPUs
Open source technology project
BSD license. Characteristics: Cooperative multithreading Assured interrupt-latency Prioritized event handling Different configurable timers Dynamic memory
Ethernut
UK-based software company founded in 1981
in the life of the Archimedes, FaxPack was delayed after "serious interrupt latency problems" were experienced with the Archimedes' original operating
Xara
Networking in online games
delays can be inconsistent due to sudden fluctuations in current latency. Should the latency between players exceed an established buffer window for the remote
Netcode
to transmit through the serial port. Although it is possible that interrupt latency on the host PC may cause slightly less than 11,520 bytes to be sent
Voice_modem
Form of input/output processing
in latency of reaction to pending I/O. Striking an acceptable balance between these two opposing forces is difficult. (This is why hardware interrupt systems
Asynchronous_I/O
such as the Cell Broadband Engine to dynamically hide latencies that occur due to memory latency or I/O operations. Micro-threading is a software-based
Micro-thread_(multi-core)
Form of human sexual intercourse
22, as many as 47% reported pain, but they said they did not want to interrupt the sex act. Some pretended to enjoy it instead of giving the man any
Penile–vaginal_intercourse
Signetics microprocessor
interrupts can be retrofitted to the 8X300. The interrupt latency is less than 750 nanoseconds. Interrupts consist of a number steps, each requiring hardware
Signetics_8X300
Fifth-generation mobile telecommunications standard
ideal conditions, as well as latency and connection-density targets for enhanced mobile broadband, ultra-reliable low-latency communications, and massive
5G
Open standard processor interconnection for data centers
peripheral devices to coherently access and cache host CPU memory with a low latency request/response interface. CXL.mem – allows host CPU to coherently access
Compute_Express_Link
Method by which work is assigned
becoming ready until the first point it begins execution); minimizing latency or response time (time from work becoming ready until it is finished in
Scheduling_(computing)
Family of microprocessor cores with Arm microarchitecture
defined by IEC 61508. Electronics portal ARM architecture family Interrupt, Interrupt handler JTAG, SWD List of ARM processors List of ARM Cortex-M development
ARM_Cortex-R
subsystem. Common forms of hardware contention include CPU cycles, interrupt latency, I/O bandwidth, available system memory, or aggregate system memory
Server_hog
Local computer bus for attaching hardware devices
0000: Interrupt Acknowledge This is a special form of read cycle implicitly addressed to the interrupt controller, which returns an interrupt vector
Peripheral Component Interconnect
Peripheral_Component_Interconnect
Audio routing software
(formerly interrupt) 1..100 pin instances Supports almost any of fixed-point PCM audio formats (Floating-point formats are not supported) Low sound latency with
Virtual_Audio_Cable
Family of 16-bit microcontrollers
extensions such as bit-addressable memory and an interrupt system optimized for low-latency. When this architecture was introduced the main focus
C166_family
Family of DNA viruses
viral genes. In some host cells, a small number of viral genes termed latency-associated transcript (LAT) accumulate, instead. In this fashion, the virus
Herpesviridae
Distributed computing paradigm
that pushes computation physically closer to a user, so as to reduce the latency compared to when an application runs on a centralized data center. The
Edge_computing
Programming technique using indirect jumps
(2001-09-01). "Trampolines for Embedded Systems: Minimizing interrupt handlers latency". Dr. Dobb's Journal. Archived from the original on 2018-05-27
Trampoline_(computing)
Application layer protocol
stylesheets, etc.). HTTP/1.1 communications therefore experience less latency as the establishment of TCP connections presents considerable overhead
HTTP
CPU instruction to set a memory location to a flag value and return its prior value
a BUSY interrupt, which tells CPU 2 that it must wait and retry. This is an implementation of a busy waiting or spinlock using the interrupt mechanism
Test-and-set
Type of computer memory
the configured CAS latency. So if a read command is issued on cycle 0, another read command is issued on cycle 2, and the CAS latency is 3, then the first
Synchronous dynamic random-access memory
Synchronous_dynamic_random-access_memory
Real-time operating system
of very low-latency interrupt handlers that cannot be delayed or preempted by Linux itself and some low level synchronization and interrupt control routines
RTLinux
Minicomputer sold by IBM
the real-time interrupt latency, using the 4 levels of priority and the carefully crafted software paths to ensure guaranteed latencies. Fortran and a
IBM_System/7
Eyes not aligning when looking at something
combination of these), is only present after binocular vision has been interrupted, typically by covering one eye. This type of person can typically maintain
Strabismus
Male inability or persistent difficulty in achieving orgasm
most men's intravaginal ejaculation latency time range is approximately 4 to 10 minutes. While ejaculatory latency and control were significant criteria
Delayed_ejaculation
Networking protocol for clock synchronization
synchronization between computer systems over packet-switched, variable-latency data networks. In operation since before 1985, NTP is one of the oldest
Network_Time_Protocol
Feature of computer systems
I/O processing latency, allows processing of the I/O to be performed entirely in cache, prevents the available RAM bandwidth/latency from becoming a
Direct_memory_access
interrupt service routine. Thus, the smaller the context is, the smaller the latency is. The context data may be located in processor registers, memory used
Context_(computing)
Set of standards under development by the IEEE for real-time networking
switches. These extensions in particular address transmission with very low latency and high availability. Applications include converged networks with real-time
Time-Sensitive_Networking
American software company
applications. Direct hardware (access to I/O) and deterministic timing (interrupt latency) needs are addressed by giving the guest OS direct access to time-critical
TenAsys
Computer system with a dedicated function
unexpected delays. Sometimes the interrupt handler will add longer tasks to a queue structure. Later, after the interrupt handler has finished, these tasks
Embedded_system
Interface used for connecting storage devices
a logical-device interface, has been designed to capitalize on the low latency and internal parallelism of solid-state storage devices. Architecturally
NVM_Express
Morse code operating mode
dashes) or letters of the Morse transmission. This allows other stations to interrupt the transmitting station between individual coding elements, and such
QSK_operation_(full_break-in)
Cloud computing platform
with control over the geographical location of instances that allows for latency optimization and high levels of redundancy. In November 2010, Amazon switched
Amazon_Elastic_Compute_Cloud
Visual artifact in video display
that copies or renders the display at a fixed, constant speed. Too much latency causes the monitor to overtake the software on occasion, leading to rendering
Screen_tearing
6-pin mini-DIN connector for connecting keyboards and mice to a PC compatible computer
low, communication from the attached device is inhibited. The host can interrupt the device by pulling Clock low while the device is transmitting; the
PS/2_port
Family of RISC-based computer architectures
processor. Coprocessor accesses have lower latency, so some peripherals—for example, an XScale interrupt controller—are accessible in both ways: through
Arm_architecture_family
Ethernet network card line
information into status registers such that a device driver can optimize for any latency. PC/TCP Packet Driver for use with MS-DOS or PC DOS on X86 Amiga networking
3Com_3c509
Segment of content intended for broadcast on radio
capabilities, offering faster data speeds, improved coverage, and reduced latency. Two-way radio network: Two-way radio networks are commonly used in public
Radio_program
New API (also referred to as NAPI) is an interface to use interrupt mitigation techniques for networking devices in the Linux kernel. Such an approach
New_API
Proprietary simultaneous multithreading implementation by Intel
Intel, performance impacts of hyper-threading result in increased overall latency in case the execution of threads does not result in significant overall
Hyper-threading
Multi-parameter study of sleep and sleep disorders
Polysomnography data can be directly related to sleep onset latency (SOL), REM-sleep onset latency, number of awakenings during the sleep period, total sleep
Polysomnography
Mode of data transmission
transaction can be typically written as a sum of initial access latency plus sequential access latency. t t o t a l = t i n i t i a l + t s e q u e n t i a l
Burst_mode_(computing)
Selective artificial removal of memories or associations from the mind
drug-induced amnesia, selective memory suppression, destruction of neurons, interruption of memory, memory reconsolidation, and the disruption of specific molecular
Memory_erasure
Type of computer
less latency. Whereas the corresponding data cache can start only one read or one write (not both) per cycle, and the read typically has a latency of two
Stack_machine
Traffic prioritization and measure of network performance
confused with a high level of performance, for example high bit rate, low latency and low bit error rate. QoS is sometimes used in application layer services
Quality_of_service
Method of executing orders
2009), low latency trade processing time was qualified as under 10 milliseconds, and ultra-low latency as under 1 millisecond. Low-latency traders depend
Algorithmic_trading
Member of the polyomavirus family
is known to establish lifelong latent infection in the urinary system. The mechanism of how the virus establishes latency is not fully understood. Therefore
BK_virus
INTERRUPT LATENCY
INTERRUPT LATENCY
Boy/Male
Native American
He interrupts.
Girl/Female
Indian
Interrupter of the sacrifice of Daksha
Girl/Female
Hindu, Indian, Marathi, Sanskrit
Continuing; Forming an Interrupted Line
Girl/Female
Indian
Interrupter of the sacrifice of Daksha
Girl/Female
Tamil
Dakshayajnavinaashini | தகà¯à®·à®¾à®¯à®¾à®œà®¨à®¾à®µà®¿à®¨à®¾à®·à®¿à®¨à¯€
Interrupter of the sacrifice of Daksha
Dakshayajnavinaashini | தகà¯à®·à®¾à®¯à®¾à®œà®¨à®¾à®µà®¿à®¨à®¾à®·à®¿à®¨à¯€
Girl/Female
Tamil
Dakshayajñavinaashini | தகà¯à®·à®¾à®¯à®œà¯à®žà®…விநாஷீநீ
Interrupter of the sacrifice of Daksha
Dakshayajñavinaashini | தகà¯à®·à®¾à®¯à®œà¯à®žà®…விநாஷீநீ
Male
Native American
Native American Navajo name ATA'HALNE means "he interrupts."
INTERRUPT LATENCY
INTERRUPT LATENCY
Girl/Female
French American English
Feminine of Charles meaning manly.
Girl/Female
Hindu
Goddess Sita, Genus of a bird (Daughter of Janaka and wife of Rama)
Girl/Female
Hindu, Indian, Sanskrit
Lotus Faced
Female
Hebrew
 Variant spelling of Hebrew unisex Adi, ADDIE means "my ornament" or "my witness." Compare with another form of Addie.
Boy/Male
Biblical American Hebrew
Happiness.
Boy/Male
Tamil
Katyayan | காதà¯à®¯à®¾à®¯à®¨
Name of a grammarian
Surname or Lastname
English
English : unexplained.Perhaps also an Americanized spelling of Dutch Cruyssen (see Crusan).
Surname or Lastname
English
English : variant spelling of Abbott.
Girl/Female
Gujarati, Hindu, Indian, Iranian, Sanskrit
Having Stars
Surname or Lastname
English (Northumberland; of Norman origin)
English (Northumberland; of Norman origin) : habitational name from Breuil in Calvados or from any of numerous places elsewhere in France called La Breuil.
INTERRUPT LATENCY
INTERRUPT LATENCY
INTERRUPT LATENCY
INTERRUPT LATENCY
INTERRUPT LATENCY
v. t.
To shut off or out from a place or course, by something intervening; to intercept; to cut off; to interrupt.
v. t.
To take or seize by the way, or before arrival at the destined place; to cause to stop on the passage; as, to intercept a letter; a telegram will intercept him at Paris.
n.
One who, or that which, interrupts.
p. pr. & vb. n.
of Interrupt
p. pr. & vb. n.
of Intercept
v. t.
To disturb; to interrupt.
a.
Incorrupt.
p. a.
Broken; interrupted.
v. t.
To interrupt communication with, or progress toward; to cut off, as the destination; to blockade.
v. t.
To interrupt, break in upon, or intercede with.
v. i.
To interrupt; -- with in or out.
n.
An instrument which periodically or otherwise interrupts an electric current.
v. t.
To divide; to separate; to break the monotony of; as, the evenness of the road was not interrupted by a single hill.
v. t.
To break into, or between; to stop, or hinder by breaking in upon the course or progress of; to interfere with the current or motion of; to cause a temporary cessation of; as, to interrupt the remarks speaking.
imp. & p. p.
of Intercept
imp. & p. p.
of Interrupt
a.
Not continuous; interrupted; broken off.
a.
Tending to interrupt; interrupting.
a.
Intercepting or tending to intercept.
v. t.
To obstruct or interrupt the progress of; to stop; to hinder or oppose; as, to intercept the current of a river.