IBM GC28-1982-02 manual 192

P

point-to-point

communication

.

A

communication

operation

which involves exactly two processes or

package

.

A

number

of

filesets

that

have

tasks. One

process

initiates

the

communication

through

been

operation. The

partner

processreceivissues

a

collected

into

a

single

installable

image

of

a send

program

operation to accept the data being sent.

products, or LPPs. Multiple filesets can be bundled

together

for

installing

groups

of

software

together.

.

See

In

a

programming

language,

a

block,

also filesetand Licensed

Program

Product.

procedure

(1)

with

or

without formal parameters, whose execution is

parallelism .

The

degree

to

which

parts

of

invoked

by means of a procedure call. (2)

A

set

of

a

program

control

statements

that

cause one

or

more

may

be

concurrently

executed.

related

programs

to

be

performed.

parallelize .

To

convert

a

serial

program

for

parallel

A

program

or

command

that

is

actually

execution.

process .

running

the computer. It consists

of

a

loaded

versio

Parallel

Operating

Environment

(POE)

.

An

execution

the

executable

file,

its

data,

its

stack,

and

its

environment

that

smooths

the

differences

structures that represent the process's state within

between

serial

and

parallel

execution.

It

lets

you

multitasking environment. The executable file contains

submit

and

shared

manage

parallel

jobs.

It

is

abbreviated

the

machine instructions (and any calls to

and

commonly

that

will

be

executed

by

the

hardware. A

known

as

POE.

objects)

process

can contain multiple threads

of

execution.

parameter

.

* (1) In Fortran, a symbol that

Theis givenprocessa

is

createdfork

()viasystema

call

and

constant

value

for

a

specified

application.

ends(2)

Anusingitemexitanin()

system

call.

Betweenfork and

a menu for which the

operator

specifies

a exitvalue, theor processf

is known to the system by

a

unique

which

the

system

provides

a

value

when

the processmenu is identifier

(pid).

interpreted.

(3)

A

name

in

a

procedure

that

is

used

to

its

own

virtual

memory

space

and

refer

to

an

argument

that

is

passed

to

Each

process

has

the

procedure.

another

process's

memory

directly.

(4)

A

particular

piece

of

information

that

cannot

access

a

system or

application

program

needs

to

process

a

Communication methods across processes include

request.

pipes, sockets, shared memory, and message passing.

partition .

(1)

A

fixed-size

division

of

storage.

(2)

In

which

produces

an

execution

profile

terms of

the

IBM

RS/6000

SP,

a

logical

prof .

of

A

utility

definition

to

identifyi

nodes

to

be

viewed

as

one

system

or

an

application or program. It is useful

domain.

System

partitioning

is

a

method

of

organizing

the

SP

which

routines use the most CPU time. See the man

into

forprof .

page

groups of nodes for testing or running different levels of

software

of

product

environments.

profiling .

The

act

of determining how much CPU time

Partition

Manager

.

The

component

of

the

Parallelis

used

by

each

function

or

subroutine

in

a

progra

Operating

Environment

(POE)

that

allocates

The histogram or table produced is called the exec

nodes,

sets

profile.

up the execution environment for remote tasks, and

manages

distribution

or

collection

of

standard

input

Array

.

An

X-Windows

run

time

(STDIN),

standard

output

(STDOUT),

and

Program

Marker

standard

tool provided with Parallel Operating

error

(STDERR).

monitor

Environment, used to provide immediate visual

pdbx

. pdbx

feedback

on

a

program's

execution.

is the parallel, symbolic command line

debugging

facility pdbxof

PEis.

based

dbxon

the

pthread .

A

thread

that

conforms

to

the

POSIX

debugger

and

has

a

similar

interface.

Threads

Programming

Model.

PE . The IBM Parallel Environment for AIX program

product.

R

performance

monitor

.

A

utility

which

displays

how

operation

.

An

operation,

usually

effectively

a

system

is

being

used

by

reduction

programs.

which

reduces

a

collection of

data

by

mathematical,

POE .

See

Parallel

Operating

Environment.

or

more

dimensions.

For

example,

the

arithmetic

SUM

operation

is

a

reduction

operation

which

reduces

an

pool .

Groups

of

nodes

on

an

SP

that

are

array

to

a

scalar

value.

Other

reduction

operations

known

to

the

and MINVAL.

Resource

Manager,

and

are

identified

by

a

include

MAXVAL

number.

remote

host

.

Any

host

on

a

network

except

the

one

a

which

a

particular

operator

is

working.

192

IBM

PE

for

AIX

V2R4.0:

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