PEEK Reference Manual

Glossary

PEEK Reference Manual — 529657-006

Glossary - 9

processor clock

processor clock. A hardware timer on each processor that keeps processor time (the

number of microseconds since system load).

PTLE. See process time-list element (PTLE).

ready processes. Processes that are prepared to become active.

reduced instruction-set computing (RISC). A processor architecture based on a relatively

small and simple instruction set, a large number of general-purpose registers, and an

optimized instruction pipeline that supports high-performance instruction execution. All

TNS/R processors use the RISC architecture. Contrast with complex instruction-set

computing (CISC).

relative extended address. An address that can be used when the processor is in

privileged or nonprivileged mode to access the user code, user library, and user data

spaces of the process. A relative extended address can also be used in privileged

mode to access the system code, system library, and system data spaces of the

process. A relative extended address cannot access extended memory.

requester. A process that initiates interprocess communication by sending a message to

another process. Contrast with server.

resident cache segment. A type of absolute segment with which no swap file is

associated. To use a frame occupied by a logical page of a resident cache segment,

the system must first ask permission of the segment owner if the page has been

changed while in memory.

resident segment. A type of absolute segment with which no swap file is associated. A

logical page in a resident segment must be locked before it can be accessed and must

remain locked while it is used.

RISC. See

reduced instruction-set computing (RISC).

RISC processor. An instruction processing unit (IPU) that is based on reduced

instruction-set computing (RISC) architecture. All TNS/R processors, such as the

NSR-G and NSR-W processors, use RISC processors. Contrast with

CISC processor.

SAMPLE. The PEEK INTERRUPTS element that reports Measure sampling interrupts. See

also

trap.

SCHANL. The PEEK INTERRUPTS element that rep

orts special channel error interrupts.