PEEK Reference Manual

Glossary
PEEK Reference Manual — 529657-006
Glossary - 7
OSS SEM
OSS SEM. The table that contains all the OSS semaphores created in this processor by the
semget() function.
OSS SHM. The table that defines all the OSS Shared Memory segments created in this
processor by the shmget() function. The term, OSS shared memory, distinguishes
these segments from the Guardian shared memory segments.
page fault. A reference to a logical page that is not currently in physical memory. Such a
reference causes an interrupt, and the interrupt handler begins a sequence of
operations that loads the page into memory.
paging. A method of managing virtual memory.
path. The route between a processor and a subsystem. If a subsystem is configured for
fault tolerance, it has a primary path (from the primary processor) and a backup path
(from the backup processor).
PCB. See process control block (PCB).
PCB table. An operating system data structure that contains information about the
resources and environment of processes in a processor. See also process control
block (PCB).
PFAIL. The PEEK INTERRUPTS element that reports power-fail interrupts. See also
interrupt.
physical location. A set of values that describes the location of a component within an
enclosure. The physical location is composed of the group number, module number,
and slot number.
physical memory. The semiconductor dynamic random-access memory (DRAM) that is
part of every processor. Physical memory is the hardware resource that lies
underneath virtual memory. Code and data in physical memory is immediately
accessible without the delay of reading from disk.
physical page. See
frame.
PIN. See
process identification number (PIN).
PME table. The Posix Mapping Entry (PME) table that contains an entry each for live and
zombie OSS processes. Th
is table applies to the whole node and is replicated in each
processor.
PON. The PEEK INTERRUPTS element that reports power-on interrupts. See also
interrupt.
pool. See
memory pool.
PPL. See process-pair list (PPL).