PEEK Reference Manual

Glossary
PEEK Reference Manual — 529657-006
Glossary - 11
system services
system services. The tasks performed on behalf of the user or user programs by the
operating system, including formatting, process control, I/O support, performance
measurement, process-pair support, standard security, and transaction management.
Contrast with core services.
system time. The time represented by any synchronized processor clock in the system.
system-load environment. The software environment that exists before the operating
system is fully loaded and operational. Also called cold-load environment.
TIME. The PEEK INTERRUPTS element that reports time interrupts. See also interrupt.
time list. A linked list of time-list elements (TLEs) that are waiting for the passing of time.
time-list element (TLE). An operating system data structure that can be queued on the
time list to manage real time. Time-list elements are also called time-list control blocks.
time-list interrupt handler. An interrupt handler that manages the time list.
timekeeping. A function performed by the operating system that involves initializing and
maintaining the correct time in a processor.
timing. A function performed by the operating system that involves controlling when certain
events occur within a processor.
TLE. See time-list element (TLE).
TNS. HP computers that support the NonStop operating system and that are based on
complex instruction-set computing (CISC) technology. The term TNS can refer to the
instruction set, the architecture, or the processors. The NonStop Cyclone system is an
example of a TNS system. Contrast with TNS/R.
TNS/E. (H-series RVUs only) Refers to fault-tolerant HP computers that support the
NonStop operating system and are based on the Itanium processor
. TNS/E systems
run the Itanium instruction set and can run TNS object files by interpretation or after
acceleration. TNS/E systems include all Integrity NonStop systems that use NSE-x
processors. Contrast with TNS and TNS/R.
TNS/R. HP computers that support the NonStop operating system and that are based on
reduced instruction-set computing (RISC) technology. TNS/R processors impleme
nt
the TNS/R instruction set and maintain architectural compatibility with TNS processors.
The term TNS/R can refer to the instruction set, the architecture, or the processors.
Most NonStop K-series servers and all NonStop S-series servers use TNS/R
processors. Contrast with TNS.
trap. A system state similar to that caused by an interrupt but synchronous to the system
rather than asynchronous as in the case of an interrupt. The PEEK INTERRUPTS
option reports these types of trap
s: instruction failure traps (IFAIL), arithmetic overflow