Keywords - P

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parallel devices

· [Parallel devices] ·

throughput, maximizing

· [Parallel devices] ·

parallel ports

determining if port is available

· [Parallel devices] ·

parent directory

· [Directory links] ·

parent processes

effects of death on children

· [Execution] ·

parity error, signal generated

· [Summary of signals] ·

partitions

· [OS partitions] ·

bitmap

· [Bitmap] ·

creating, modifying, or deleting

· [OS partitions] ·

DOS partitions

· [The DOS Filesystem Manager] ·

filesystem

· [The DOS Filesystem Manager] ·

flagging as bootable

· [OS partitions] ·

key components

· [Key components of a QNX partition] ·

loader block

· [Loader block] ·

primary partitions, number per disk

· [OS partitions] ·

root block

· [Root block] ·

root directory, special characteristics

· [Root directory] ·

types

· [OS partitions] ·

passing names to other processes

· [Passing pathnames between processes] ·

pathname prefix tree

· [Prefixes and regions of authority] ·

pathname space

location

· [I/O namespace] ·

regions of authority

· [Prefixes and regions of authority] ·

pathnames

· [Directories] ·

converting relative pathnames to network pathnames

· [Relative pathnames] ·

network pathnames

· [Network root] ·

network pathnames, displaying

· [A note about cd] ·

resolving

· [I/O manager prefixes] ·

pending signals

· [Receiving signals] ·

performance

device subsystem

· [Device subsystem performance] ·

fast interactive response via adaptive scheduling

· [Adaptive scheduling] ·

Filesystem Manager

· [Filesystem Manager performance] ·

network throughput

· [Load balancing] ·

realtime

· [A word about realtime performance] ·

permissions

· [File access] ·

Photon

architecture differs from X Window System

· [A graphical microkernel] ·

architecture similar to that of OS microkernel

· [A graphical microkernel] ·

event space

· [The Photon event space] ·

event types

· [Events] ·

graphics drivers

· [Graphics drivers] · [Multiple graphics drivers] ·

microkernel runs as tiny process

· [A graphical microkernel] ·

regions

· [Regions] ·

widgets

· [Widget building toolkit] · [Widget library] ·

window manager

· [The Photon Window Manager] ·

physical node IDs

· [Physical node ID] ·

Pipe Manager

· [Pipes] ·

pipes

· [Pipes] · [What is a file?] ·

creating

· [Pipes] ·

effect of writing on a pipe with no readers

· [Summary of signals] ·

FIFOs

· [The DOS Filesystem Manager] ·

polling the network

· [Logical node ID] ·

prefix

· [Prefixes and regions of authority] ·

aliases

· [Alias prefixes] ·

tree

· [Prefixes and regions of authority] ·

displaying

· [I/O manager prefixes] ·

managed as a list of prefixes

· [I/O manager prefixes] ·

prefix (utility)

· [I/O manager prefixes] ·

priorities

· [Process priorities] ·

determining

· [Process priorities] ·

setting

· [Process priorities] ·

process control environments

· [Single-computer model] ·

Process Manager

general responsibilities

· [Process Manager responsibilities] ·

process name locator

· [Process symbolic names] ·

process names

attaching

· [Process symbolic names] ·

global names

· [Process symbolic names] ·

local names

· [Process symbolic names] ·

locating processes by name

· [Process symbolic names] ·

reducing potential name conflicts

· [Process symbolic names] ·

process states

DEAD

· [Process states] ·

determining

· [Determining process states] ·

HELD

· [Process states] ·

READY

· [Process states] ·

RECEIVE-blocked

· [Blocked states] · [Process states] ·

REPLY-blocked

· [Blocked states] · [Process states] ·

SEMAPHORE-blocked

· [Process states] ·

SEND-blocked

· [Blocked states] · [Process states] ·

SIGNAL-blocked

· [Process states] · [Signals and messages] ·

WAIT-blocked

· [Process states] ·

processes

catching signals

· [Catching signals] ·

child processes

creating

· [spawn()] ·

inheriting environment

· [Process inheritance] ·

running concurrently with parents

· [Execution] ·

children becoming zombies

· [Termination] ·

cooperating

· [Process symbolic names] ·

via messages

· [Message-passing primitives] ·

via pipes and FIFOs

· [Pipes] ·

creating

· [Creation] ·

creating on any node

· [spawn()] ·

creation primitives

· [Process creation primitives] ·

death of parent process, effects on children

· [Execution] ·

death of session leader, signal generated

· [Summary of signals] ·

executing

· [Execution] ·

executing on remote nodes

· [Default network root] ·

inheritance

· [Process inheritance] ·

life cycle

· [The life cycle of a process] ·

loading

· [Loading] ·

locating

· [Process symbolic names] ·

locating by name

· [Process symbolic names] ·

names (symbolic)

· [Process symbolic names] ·

opening a file

· [I/O manager prefixes] ·

opening the same file twice

· [Open control blocks] ·

orphan processes

· [Execution] ·

parent processes, death of

· [Execution] ·

passing names to

· [Passing pathnames between processes] ·

primitives

· [Process creation primitives] ·

priorities

determining

· [Process priorities] ·

setting

· [Process priorities] ·

remote execution

· [Default network root] ·

scheduling

· [When scheduling decisions are made] ·

adaptive method

· [Adaptive scheduling] ·

client-driven method

· [Client-driven priority] ·

FIFO method

· [FIFO scheduling] ·

round-robin method

· [Round-robin scheduling] ·

signal generated upon death of session leader

· [Summary of signals] ·

signals

catching

· [Catching signals] ·

effects of

· [Receiving signals] ·

receiving

· [Receiving signals] ·

states

· [Process states] ·

determining

· [Determining process states] ·

symbolic names

· [Process symbolic names] ·

synchronizing via message passing

· [Process synchronization] ·

system processes

· [System processes] ·

termination

· [Termination] ·

by a signal

· [Termination] ·

effect on virtual circuits

· [Virtual circuits] ·

effects of

· [Termination] ·

virtual

· [Virtual processes] ·

zombie

· [Process states] · [Termination] ·

proxies

creating

· [IPC via proxies] ·

processes that can use a proxy

· [IPC via proxies] ·

purpose of

· [Interprocess communication] · [IPC via proxies] ·

used by interrupt handlers

· [IPC via proxies] ·

virtual

· [Virtual proxies] ·

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