priority interrupt - definição. O que é priority interrupt. Significado, conceito
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O que (quem) é priority interrupt - definição

SIGNAL TO THE PROCESSOR EMITTED BY HARDWARE OR SOFTWARE INDICATING AN EVENT THAT NEEDS IMMEDIATE ATTENTION
Hardware interrupt; Interrupts; Software interrupt; Software Interrupt; Spurious Interrupt; Interrupt mask; Maskable interrupt; Masked interrupt; Level triggered interrupt; Edge triggered interrupt; Maskable interrupts; Interupt; Spurious interrupt; Trap (computing); Fault (computing); Interrupt line; Maskable Interrupt; Kernel trap; Interrupted; Interrupting; Interrupt handling; OS Trap; Shared interrupt; Interrupt (computing); IRQ affinity; Receive packet steering; Receive flow steering; Interrupt mechanism; Computer interrupt; Computer Interrupt
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  • Interrupt sources and processor handling

priority interrupt      
<jargon> Any stimulus compelling enough to yank one right out of hack mode. Classically used to describe being dragged away by an SO for immediate sex, but may also refer to more mundane interruptions such as a fire alarm going off in the near vicinity. Also called an NMI (non-maskable interrupt), especially in PC-land. [Jargon File] (2005-02-13)
Interrupt handler         
COMPUTING FUNCTION TRIGGERED BY AN INTERRUPT
Interrupt service routine; Interrupt routines; Interrupt Handler; Interrupt Service Routine; FLIH; SLIH
In computer systems programming, an interrupt handler, also known as an interrupt service routine or ISR, is a special block of code associated with a specific interrupt condition. Interrupt handlers are initiated by hardware interrupts, software interrupt instructions, or software exceptions, and are used for implementing device drivers or transitions between protected modes of operation, such as system calls.
interrupt handler         
COMPUTING FUNCTION TRIGGERED BY AN INTERRUPT
Interrupt service routine; Interrupt routines; Interrupt Handler; Interrupt Service Routine; FLIH; SLIH
<software> A routine which is executed when an interrupt occurs. Interrupt handlers typically deal with low-level events in the hardware of a computer system such as a character arriving at a serial port or a tick of a real-time clock. Special care is required when writing an interrupt handler to ensure that either the interrupt which triggered the handler's execution is masked out (inhibitted) until the handler exits, or the handler is re-entrant so that multiple concurrent invocations will not interfere with each other. If interrupts are masked then the handler must execute as quickly as possible so that important events are not missed. This is often arranged by splitting the processing associated with the event into "upper" and "lower" halves. The lower part is the interrupt handler which masks out further interrupts as required, checks that the appropriate event has occurred (this may be necessary if several events share the same interrupt), services the interrupt, e.g. by reading a character from a UART and writing it to a queue, and re-enabling interrupts. The upper half executes as part of a user process. It waits until the interrupt handler has run. Normally the {operating system} is responsible for reactivating a process which is waiting for some low-level event. It detects this by a shared flag or by inspecting a shared queue or by some other synchronisation mechanism. It is important that the upper and lower halves do not interfere if an interrupt occurs during the execution of upper half code. This is usually ensured by disabling interrupts during critical sections of code such as removing a character from a queue. (2002-07-24)

Wikipédia

Interrupt

In digital computers, an interrupt (sometimes referred to as a trap) is a request for the processor to interrupt currently executing code (when permitted), so that the event can be processed in a timely manner. If the request is accepted, the processor will suspend its current activities, save its state, and execute a function called an interrupt handler (or an interrupt service routine, ISR) to deal with the event. This interruption is often temporary, allowing the software to resume normal activities after the interrupt handler finishes, although the interrupt could instead indicate a fatal error.

Interrupts are commonly used by hardware devices to indicate electronic or physical state changes that require time-sensitive attention. Interrupts are also commonly used to implement computer multitasking, especially in real-time computing. Systems that use interrupts in these ways are said to be interrupt-driven.