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PEEK Reference Manual

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Glossary
PEEK Reference Manual — 529657-006
Glossary - 4
HP Integrity NonStop NS-series servers
HP Integrity NonStop NS-series servers. The HP Integrity NonStop servers having
product numbers beginning with the letters NS. These servers implement the
ServerNet architecture and run the NonStop operating system.
HP NonStop Blade Complex (NSBC). The set of one, two, or three NonStop Blade
Elements and their associated LSUs. For the first release of Integrity NonStop servers,
a NonStop Blade Complex contains one to four logical processors. Also called a Blade
Complex.
HP NonStop operating system. The operating system for NonStop servers.
idle process. A special process that executes when no other process is able to execute.
IFAIL. The PEEK INTERRUPTS element that reports instruction failure traps. See also
trap.
I/O. See input/output (I/O).
IIO. Mnemonic for the TNS instruction Interrogate I/O. This element reports all I/O traffic
interrupts. See also interrupt.
IIO CCLs. The PEEK INTERRUPTS element that reports IIO CCL interrupts. See also
CCL, IIO, and interrupt.
inactive process. A process that is not currently using the instruction processing unit (IPU)
of a processor. Contrast with active process.
input/output (I/O). Data entered into a computer or transmitted out of a computer. (2) The
process of entering data into or transmitting data out of a computer.
input/output process (IOP). A running program (part of the NonStop operating system)
that manages the I/O functions for one or more ServerNet addressable controllers
(SACs) of the same type.
interprocess communication. The exchange of messages between processes in a system
or network.
interrupt. The mechanism by which a processor is notified of an asynchronous event that
requires immediate processing.
interrupt environment. The software environment that exists when a processor is
executing instructions in response to an interrupt.
interrupt handler
. A procedure that is invoked by special interrupt firmware when certain
events occur in a processor
.
interrupt threshold. The maximum number of interrupts that can occur before the
operating system begins to contain the errors.
IOP. See
input/output process (IOP).