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Keywords - P

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parallel devices

· Parallel devices ·

throughput, maximizing

· Parallel devices ·

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parallel ports

determining if port is available

· Parallel devices ·

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parent directory

· Directory links ·

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parent processes

effects of death on children

· Execution ·

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parity error, signal generated

· Summary of signals ·

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partitions

· OS partitions ·

bitmap

· Bitmap ·

creating, modifying, or deleting

· OS partitions ·

DOS partitions

· 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 ·

See also filesystem

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passing names to other processes

· Passing pathnames between processes ·

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pathname prefix tree

· Prefixes and regions of authority ·

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pathname space

location

· I/O namespace ·

regions of authority

· Prefixes and regions of authority ·

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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 ·

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pending signals

· Receiving signals ·

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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 ·

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permissions

· File access ·

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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 ·

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physical node IDs

· Physical node ID ·

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Pipe Manager

· Pipes ·

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pipes

· Pipes · What is a file? ·

creating

· Pipes ·

effect of writing on a pipe with no readers

· Summary of signals ·

See also FIFOs

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polling the network

· Logical node ID ·

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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 ·

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prefix (utility)

· I/O manager prefixes ·

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priorities

· Process priorities ·

determining

· Process priorities ·

setting

· Process priorities ·

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process control environments

· Single-computer model ·

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Process Manager

general responsibilities

· Process Manager responsibilities ·

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process name locator

· Process symbolic names ·

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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 ·

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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 ·

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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 ·

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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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