Digital PDFs

AA-ME96A-TE

May 1988

30 pages

Original

1.2MB

view download

OCR Version

0.9MB

view download

Document:	ULTRIX-32 Guide to System Exercisers
Order Number:	AA-ME96A-TE
Revision:	0
Pages:	30
Original Filename:

OCR Text

ULTRIX-32

Guide to

System Exercisers

Order No. AA-ME96A-TE

ULTRIX-32 Operating System, Version 3.0

Digital Equipment Corporation

The information in this document is subject to change without notice and should not be

construed as a commitment by Digital Equipment Corporation.
Digital Equipment Corporation
assumes no responsibility for any errors that may appear in this document.

The software described in this document is furnished under a license and may be used or
copied only in accordance with the terms of such license.
No responsibility is assumed for the use or reliability of software on equipment that is not
supplied by DIGITAL or its affiliated companies.

The following are trademarks of Digital Equipment Corporation:

DEC

Q-bus

DECnet

VAX

VAXstation

DECUS

ULTRIX

VMS

MASSBUS

ULTRIX-11

MicroVAX

ULTRIX-32

ULTRIX Worksystem Software

PDP

UNIBUS

/il tla] ]

UNIX is a registered trademark of AT&T in the USA and other countries.
IBM is a registered trademark of International Business Machines Corporation.

MICOM is a registered trademark of Micom System, Inc.
This manual was written and produced by the ULTRIX Documentation Group in Nashua, New

Hampshire.

Contents

About This Manual
PN T 1= o 1oL - ST T R TP PP

Organization

e se eeee

Related DOCUIMENES .ouviiieiiiiiiiiiieeiiiieriieeeieeeertieesrieeerieesaressesessseresssssnssresesens

L 070] 13 2=0 017 (o) s 1= TR

1.1 Running System EXerciSers ........ccccoccciiiiiiiiiiiiiiiniiiin,

1-2

1.2 Exercising More Than One Part of the System

...........ccccovviinnnnne

1-2

1.3 Using Exerciser Diagnostics .......ccccoovvviiiiiiiiiiiiiiiiiiin,

1-3

........coooeviiiiieiirreriii

1 Testing Your System with Exercisers

2 Exercising File Systems and Memory
2.1 Exercising the Local File System

........ccccccccviiiimiimiiiiiin,

2-1

....cccccococoivveriiiiimiiiininniiiiiiii.

2-2

.......cccoooeviiiiiiiiiiiiiniiiiiinni

2-3

...cccccccoviiiiiiiiiiiiiiiiii
i,

3-1

2.2 Exercising the System Memory

2.3 Exercising Shared Memory

3 Exercising Peripherals
3.1 Exercising the Disk Drives

3.2 Exercising the Tape DIiVES .......ccccovveeemieeemieeeeieeeeereeeeeeeeeeeeeeeoeeees,

3-2

3.3 Exercising the Lineprinters

3-4

........c.cccoocovveeevereeoeseeeeeeeeeees oo,

4 Exercising Network and Communications Systems
4.1 Exercising the TCP/IP NetWork

........cccoooveeoeeeeeeeoeeeeeeeeeeeseeeoeesoesn

4-1

4.2 Exercising the Terminal Communication System .........c.cooevovvvevvnnnnn.

4-2

Index

iv Contents

About This Manual

The objective of this guide is to provide you with information on system
exercisers.

It describes how to run system exercisers and explains the

exercisers you use for file systems and memory, peripherals, and network
and communications.

Audience
The Guide to System Exercisers is written for the person responsible for
managing and maintaining an ULTRIX operating system.

It assumes that

this individual is familiar with ULTRIX commands, the system
configuration, and the system’s controller/drive unit number assignments.

You do not need to be a programmer to use this guide; however, you
should be familiar with an ULTRIX editor, such as vi or ed.

You should

also be aware of the naming conventions used in this book.

Organization
This manual consists of four chapters and an index. The chapters are:

Chapter 1:

Running System Exercisers
Provides an overview of system exercisers.

It describes

how to run system exercisers, how to exercise more

than one part of the system simultaneously, and
exerciser diagnostics.
Chapter 2:

Exercising File Systems and Memory
Describes the exercisers that test file systems, system
memory, and shared memory.

Chapter 3:

Exercising Peripherals
Describes the exercisers that test disk drives, tape

drives, and line printers.
Chapter 4:

Exercising Network and Communications Systems

Describes the exercisers that test TCP/IP and terminal
communications.

Related Documents
This document should be used in conjunction with the ULTRIX Reference
Pages.

Conventions
The following conventions are used in this manual:

special

In text, each mention of a specific command, option,
partition, pathname, directory, or file is presented in this
type.

command(x)

In text, cross-references to the command documentation
include the section number in the reference manual where
the commands are documented.
cat(1) command.

For example: See the

This indicates that you can find the

material on the cat command in Section 1 of the reference
pages.

literal

In syntax descriptions, this type indicates terms that are
constant and must be typed just as they are presented.

italics

In syntax descriptions, this type indicates terms that are

variable.

[ ]

In syntax descriptions, square brackets indicate terms that
are optional.
In syntax descriptions, a horizontal ellipsis indicates that
the preceding item can be repeated one or more times.

function

In function definitions, the function itself is shown in this
type. The function arguments are shown in italics.

UPPERCASE

The ULTRIX system differentiates between lowercase and
uppercase characters.

Enter uppercase characters only

where specifically indicated by an example or a syntax line.
example

In examples, computer output text is printed in this type.

example

In examples, user input is printed in this bold type.

vi About This Manual

This is the default user prompt in multiuser mode.
This is the default superuser prompt.

>>>

This is the console subsystem prompt.

In examples, a vertical ellipsis indicates that not all of the
lines of the example are shown.

<KEYNAME > In examples, a word or abbreviation in angle brackets
indicates that you must press the named key on the
terminal keyboard.
<CTRL/x>

In examples, symbols like this indicate that you must hold
down the CTRL key while you type the key that follows
the slash.
Use of this combination of keys may appear on
your terminal screen as the letter preceded by the
circumflex character.
In some instances, it may not appear
at all.

About This Manual vii

Testing Your System with Exercisers 1

This chapter describes how to use system exercisers as a troubleshooting
tool for your ULTRIX operating system. The exercisers are commands
residing in the /usr/field directory that allow you to test all or part of your
system by exercising specified parts.
Note that to run the exercisers you
must be logged in as superuser.

The system exercisers test the following system areas:
o

System memory and file systems

Peripherals

Network and communications systems

Specific exercisers for each area are described in the following chapters.
Each of the exercisers has an on-line help facility which prints a
description of how to use the exerciser.
To access on-line help, use the -h
option.
#

For example, to access help for the dskx exerciser type:
dskx

-h

For additional information on each of the exercisers, see the ULTRIX
Reference Pages.
Note

If you are running exercisers in a diskless operating system

environment, you must either use the -0 option of the exerciser,
or move the /usr/field directory to a writable area.
Because the
netx exerciser does not have an -0 option, you must copy netx to
a writable area before exercising the TCP/IP network.
By default, the /usr file system is mounted read-only in a
diskless environment.

Since some of the system exercisers in

/usr/field require their log files to be local to the exerciser, the

read-only restriction prevents the creation of the client’s log file,
causing that test to fail

To avoid this problem, copy the desired exerciser and its
associated files to /var/tmp before executing them.

1.1

Running System Exercisers

To run any of the exercisers you must be logged in as superuser and

lusr/field must be your current directory.
%

For example:

password:

/usr/field

All of the examples in this guide assume that you are logged in as the
superuser and that your current directory is /usr/field.

All of the system exercisers, except netx, have the —o option.
The -0
option allows you to specify a file where diagnostic output is saved when
the exerciser terminates.

All of the exercisers can be run in either the foreground or the background
and can be canceled at any time by pressing CTRL/C in the foreground.
Also, you can run more than one exerciser at the same time.
Keep in
mind, however, that the more processes you have running, the slower the
system will perform.

Thus, before exercising the system extensively, make

sure there are no other users on the system.

Section 1.2 describes how to run multiple exercisers using the syscript
utility, and Section 1.3 describes exerciser log files.

1.2

Exercising More Than One

Part of the System

To exercise more than one part of the system simultaneously, use the
syscript maintenance command.
The syscript command asks you which
exercisers you want to run, how long you want to run each exerciser, and
how many exercisers you want to run at one time.
The syscript command
allows you to exercise a device, a subsystem, or the entire system.
For
more information, refer to syscript(8) in the ULTRIX Reference Pages.
You can start each exerciser either manually, by specifying the time
and by placing each command in the background
before executing the next command, or you can use the syscript command.
parameter (-t option)

If you are using the syscript command, type:
#

syscript

Once the syscript command is running, answer the questions that it asks.
The syscript command then executes the individual exercisers and creates a
file called testsuite, which contains all of the answers you entered when you

first executed syscript.

You can reexecute the commands in the testsuite

file by entering:
#

testsuite

This causes testsuite to execute using the original commands and
parameters that you entered.

1-2 Testing Your System with

Exercisers

1.3

Using Exerciser Diagnostics

When an exerciser is halted (by either CTRL/C or timing out), it prints
diagnostics on the terminal. These diagnostics are also stored in the
exerciser’s latest logfile. The diagnostics inform you of the tests results.
Each time an exerciser is invoked, a new logfile is generated in the
Jusr/field directory. For example, when you execute the cmx command for
the first time, a logfile named #LOG_CMX_01 is created. The logfiles are
records of each exerciser’s results and consist of the starting and stopping
times, and of error and statistical information. The starting and stopping
times of exercisers are also logged into the system errorlog file,
/usr/adm/syserr/syserr.hostname. This file also contains information on
errors reported by the device drivers or by the system.

The logfiles are especially useful if you have a video display terminal
because they provide a record of the diagnostics. However, after reading a
logfile you should delete it, since no more than nine logfiles can accumulate
for each exerciser. If you attempt to run an exerciser when it has already
accumulated nine logfiles, the exerciser tells you to remove some of the old
logfiles so that it can create a new one.

If the exercisers find errors, you can determine which device or area of the
system has the difficulty by looking at the system errorlog file
/usrfadm/syserr/syserr.hostname, using the appropriate uerf command. For
more information on the error logger, see the Guide to the Error Logger
System.

For the meanings of the error numbers and signal numbers, see intro(2)
and sigvec(2) in the ULTRIX Reference Pages.

The following chapters describe each of the system exercisers in detail.

Testing Your System with Exercisers 1-3

Exercising File Systems and Memory 2

This chapter describes the system exercisers that test local file systems,
system memory, and shared memory.

2.1

Exercising the

Local File

System

Use the fsx command to exercise the file systems locally.

The fsx

command exercises the specified file system by initiating multiple processes,
each of which creates, writes, closes, opens, reads, validates, and unlinks a
test file of random data.
to fsx(8)

For more information on the fsx command, refer

in the ULTRIX Reference Pages.

Note
Do not run fsx on a file system that is on the same partition

that dskx is currently read/write exercising.

The dskx exerciser

will be overwriting the file system that the fsx exerciser is
supposed to be using.

Do not test remotely mounted file systems with fsx.

The format of the fsx command is:
fsx

—-h

-ofile

—pn

—fpath

-tmin

-h

Prints the help message for the fsx command.

—-ofile

Saves the output diagnostics in file.

-pn

Specifies the number of processes you want fsx to initiate.
maximum number of processes is 250.

The

If you do not specify the

—p option, the default of 20 is assumed.

—fpath

Specifies the pathname of the directory of the file system to test,

for example, —flusr or —f/mnt.

If you do not specify the —f option,

the default is /usr/field.
—tmin

Specifies how many minutes you want the fsx command to exercise
the file system.

If you do not specify the —t option, the fsx

command runs until you terminate it by pressing CTRL/C in the
foreground.

The following is an example of the fsx command:
#

fsx

-pb5

-f/usr

-t60

The example shows how to test the /usr file. system with five processes
running for 60 minutes in the background.

2.2

Exercising the System Memory

Use the memx command to exercise the system memory.

The memx

command exercises the system memory by initiating multiple processes.
By default, the size of each process is defined as the total system memory
in bytes divided by 20.

process is 4095.

The minimum allowable number of bytes per

The memx command runs ones and zeros, zeros and

ones, and random data patterns in the allocated memory being tested.
If you are running memx in a diskless environment, you must copy the
memx file and its associated files from /usr/field to a writeable area.

The

files that you need to run the memx exerciser include the following:
o

memx

memxr

shmx

shmxb

For more information refer to memx(8)

in the ULTRIX Reference Pages.

Note

The memx command is restricted by the amount of available
swap space.

The size of the swap space and the internal

memory available determine how many processes can run on your
system.

For example, if there are 16 Mbytes of swap space and

16 Mbytes of memory, all the swap space would be used if all
20 (the default)

initiated processes were running simultaneously.

This would prevent any other process from executing.

Therefore, on systems with large amounts of memory and small
amounts of swap space, you must use the —p or the —m options,
or both, to restrict the number of memx processes or to restrict

the size of the memory being tested.
The format of the memx command is:
memx

-h

-ofile

—s

—-mn

—-px

—-tmin

~-h

Prints the help message for the memx command.

—-0ofile

Saves the output diagnostics in file.

2-2 Exercising

File Systems and

Memory

-s

Disables automatic invocation of shmx, which is performed by
default.

-mn

Specifies the amount of memory in bytes (n)
test.

for each process to

The default is the total amount of memory divided by 20,

with a minimum size of 4095 bytes.
- px

Specifies the number of processes to initiate.

The maximum

number is 20, which is also the default.

—tmin

Specifies how many minutes you want the memx command to
exercise the memory.

If you do not specify the —t option, the

memx command runs until you terminate it by pressing CTRL/C in
foreground.

The following is an example of the memx command:
#

memx

-s

-m4095

-p5

-t60

This example disables automatic execution of the shared memory exerciser,
shmx, which is performed by default.

It also initiates five processes that

test 4095 bytes
of memory, and it runs in the background for 60 minutes.

2.3

Exercising Shared Memory

Use the shmx command to exercise shared memory. The shmx command
spawns a background process called shmxb, and together shmx and shmxb
exercise the shared memory segments. They take turns writing and reading
each other’s data in the segments.
Using shmx, you can test the number and the size of memory segments

and shmxb processes. The shmx exerciser runs until the process receives
either a CTRL/C or a kill =15 pid command in foreground.
information on the kill command refer to kill(1)

For more

in the ULTRIX Reference

Pages.
You automatically invoke shmx when you start memx.

You can also run

shmx by itself.

The shmx format is:
shmx

-h

-ofile

-ti

-mj

-sk

-v

-h

Prints the help message for the shmx command.

- ofile

Saves diagnostic output in file.

-v

Uses the fork system call instead of the vfork system call to
spawn shmxb.

-ti

Indicates the run time in minutes (i). The default is to run
until the process receives either a CTRL/C or a kill -15 pid

command in foreground.

Exercising

File Systems and Memory 2-3

-mj

Specifies the memory segment size in bytes (j)

to be tested

by the processes; j must be greater than 0. The default is

SMMAX/6.

(SMMAX is a system parameter set in the file

/sys/conf/param.c.)

-sk

Specifies the number of memory segments (k).
is 6.

The default

The maximum is also 6.

The following example tests six memory segments (default), each with a
segment size of SMMAX/6.

The test terminates when you either press

CTRL/C or issue the command kill -15 pid in the foreground.
#

shmx

Here is another example of the shmx command:
#

shmx

-t180

-ml00000

-s3

This example runs three memory segments of 100,000 bytes for 180
minutes in the background.

2-4 Exercising

File Systems and

Memory

Exercising Peripherals 3

This chapter describes the system exercisers that you use to test the
following peripherals:
o

Disk drives

Tape drives

Line printers

3.1

Exercising the Disk Drives

Use the dskx maintenance command to exercise the disk drives.

The dskx

maintenance command exercises specified partitions and file systems on the

designated disk.
First, dskx checks to see if the specified file system is on the disk.

If the

file system exists and if you are using either the —p or -c options, dskx

asks you if you want to continue or stop the program.

These options

overwrite data on the disk, destroying any file systems on the specified
partition or device.

Note

The -p and -c options destroy data on the device you are
testing.

Use extreme caution when using either of these options.

When using the —p option, ensure that the partition you are
exercising does not overlap other partitions because you will

inadvertently destroy data on another partition.

Use the chpt

maintenance command with the —q option to see which partitions

overlap on the device you are testing.
For more information on the dskx command, refer to dskx(8)

ULTRIX Reference Pages.
The format of the dskx command is:
dskx
-h

—h

-ofile

—pdevpart

—cdev

—rdev

—-tmin

Prints help message for the dskx command.

-dn

in the

-0ofile

Saves output diagnostics in file.

-pdevpart

Performs random seeks, writes, and reads on the specified
partition (part)

of the device (dev).

random data and block sizes.

Next, it validates the

The part specifies the partition

on the device and can be a through h.
You cannot test the ¢ partition because the test would corrupt
the bad block information.

dev

Specifies the raw or buffered device name and number such
as rra2 for an RA device or hp0 for an RM or an RP device.

—-cdev

Performs random seeks, writes, and reads on all the partitions
of the specified device (dev)

except for the ¢ partition.

Partition ¢ is not tested because the test would corrupt the

bad block information.
—rdev

Performs random seeks and reads on all partitions of the
device specified (dev)

except for partition ¢.

The —-r option is

safe to use on any disk containing file systems because it will
not overwrite data.
~tmin

Specifies how many minutes you want the dskx command to
exercise the disk.

If you do not specify the -t option, the

dskx command runs until you terminate it by pressing CTRL/C
in the foreground.

-dn

Specifies in minutes how often you want the dskx command
to print diagnostics to the terminal. The default is to print

diagnostics upon completion of the exercise.
The following are examples of the dskx command:
#

dskx

-rra0

dskx

-pralg

-t20

-d5

-t60

-d10

The first example tests the first RA disk on the system for 20 minutes in
the background.
minutes.

Diagnostics are printed to the terminal every five

Note that this example shows how to seek and read the device;

no file systems are overwritten.

The second example tests the g partition of the ral

device for 60 minutes.

It runs in the background and writes diagnostics to the terminal every 10
minutes.

3.2

Exercising the Tape Drives

Use the mtx maintenance command to exercise the tape drives.

The mtx

command writes, reads, and validates random data on a tape device from

the beginning of the tape (BOT)
information refer to mtx(8)

3-2

Exercising

Peripherals

to the end of the tape (EOT).

in the ULTRIX Reference Pages.

For more

The format of the mtx command is:
mtx

—h

-ofile

—rn

—fn

—-sdev#

—|dev#

—-vdev#

—adev#

—tmin

Prints help message for the mtx command.

-h
-ofile

Saves diagnostic output in file .

-In

Specifies the record length in bytes for the long record exercise.

The range of n is 100 through 20480 bytes.
is 10240 bytes.

The default value

Specifies the length of the file in numbers of records.

-fn

variable n is the number of records.

(-1).
—sdev#

The

The default value is EOT

Performs a short record test that writes, reads, and validates 512

byte records (the default)

on device dev.

The variable dev# is

the raw device name and number such as rmtOh for a high-

density rewind tape device, or nrmtOl for a low-density no rewind
tape device.
—ldev#

Performs a long record test that writes, reads, and validates
10240 byte records (the default) on device dev#.
The variable
dev# is the raw device name and number such as rmtOh for a
high-density rewind tape device, or nrmt0l for a low-density no
rewind tape device.

—vdev#

Performs a variable record length test that writes, reads, and
validates random record lengths from 512 to 20280 bytes on
device dev#.
The variable dev# is the raw device name and
number such as rmtOh for a high-density rewind tape device, or
nrmtOl for a low-density no rewind tape device.

—adev#

Performs short, long, and variable record length tests on device
dev#.
The variable dev# is the raw device name and number
such as rmtOh for a high-density rewind tape device, or nrmt0l
for a low-density no rewind tape device.

—-tmin

Specifies how many minutes you want the mtx command to
If you do not specify the —t option, the
mtx command will run until you terminate it by pressing CTRL/C

exercise the tape drive.
in foreground.

The following is an example of the mtx command:
#

mtx

-r20480

-IrmtOh

-t60

This example shows how to perform a long record test on the tape device
The record length is 20480 bytes and the test runs for 60
minutes in the background.

rmtOh.

Exercising

Peripherals 3-3

3.3

Exercising the

Lineprinters

Use the Ipx maintenance command to exercise the lineprinters.
The Ipx
command exercises the line printers by printing a rolling character pattern
repeatedly to the device.

If the device is offline, Ipx attempts to start the

device every 60 seconds until it succeeds or until you terminate it.

Once

the line printer starts, the Ipx command prints five pages of a rolling
character pattern, pauses for 15 minutes, and then repeats the printing and
pausing sequence until the the command terminates. For more information
refer to Ipx(8)

in the ULTRIX Reference Pages.

Note

To prevent other jobs from interfering with the test, you should
disable the line printer queue of the printer you are testing
before using the Ipx.

You may need to look in the /etc/printcap

file to determine the spool queue and then use the line printer
control command Ipc to accomplish this task.
The format of the Ipx command is:
lpx

—h

-ofile

—pn

—-ddev

—-tmin

-h

Prints help message for the Ipx command.

- ofile

Saves diagnostic output in file.

-pn

Specifies the pause period in n minutes.

The default pause

period is 15 minutes and the shortest pause can be zero (0)
minutes.

- ddev

Specifies the line printer you want to test such as lp or lpl.
The device names are listed in the /dev directory.

—tmin

Specifies how many minutes you want the lpx command to
exercise the line printer.

If you do not specify the —t option,

the Ipx command runs until you terminate it by pressing CTRL/C

in foreground.
The following is an example of the Ipx command:
#

Ipx

-t60

-dlpl

This example shows how to exercise the Ip1 lineprinter for 60 minutes in
the background.

3-4 Exercising

Peripherals

Exercising Network and Communications Systems 4

This chapter explains the system exercisers used to test the following
network and communications systems:
°

TCP/IP

Terminal communications

4.1

Exercising the TCP/IP Network

Use the netx maintenance command to exercise the TCP/IP network.

The

netx command sets up a stream socket connection with netx acting as the
client and the miscd utility acting as the server in the TCP/IP internet

domain.

Using the connection, the netx command writes random data to

the miscd server.

The server loops the data back to netx, and then the

data is read and verified against the original data.
on the netx command, refer to netx(8)

For more information

in the ULTRIX Reference Pages.

The netx command uses the port number of the echo TCP service in the
letc/services file.

The echo TCP service must be enabled in the

letc/inetd.conf file.

The service is enabled if there are no number signs

(#) in front of the echo service.

If you remove the number sign (#)

from the echo TCP service in the

/etc/ined.cong file, you must start the echo daemon.

To do this, first find

the PID of inetd, using the ps -ax command. Then type the command:
kill

-HUP pid

The pid argument is the PID of the inetd daemon.
The format of the netx command is:
netx

-h

—pn nodename

—1tmin

-h

Prints the help message for the netx command.

-pn

Specifies the port number to use in the internet domain.

variable n must be less than 32768.

The

By default, netx uses

the port associated with the echo service, so you should not
have to use this option.

nodename

The name of the remote or local system host running the
server.

—tmin

Specifies how many minutes you want the netx command to
exercise the network connection.

If you do not specify the -t

option, the netx command runs until you terminate it by
pressing CTRL/C in foreground.

The following is an example of the netx command:
#

netx

suez

-t60

The example shows how to test the network connection to a remote
system host named suez.

4.2

The test runs for 60 minutes in the background.

Exercising the Terminal Communication System

Use the cmx maintenance command to exercise the terminal
communications system.

The cmx command writes, reads, and validates

random data and packet lengths on the communications line or lines
specified.

The lines you exercise must have a loopback connector attached

to the distribution panel or the cable.

Otherwise, cmx repeatedly prints an

error message to the terminal until its time expires or until you press
CTRL/C. For more information on the cmx command, refer to cmx(8)

the ULTRIX Reference Pages.
Also, the lines you specify must be disabled in the /etc/ttys file.

See the

Guide to System Environment Setup for information about the /etc/ttys file.
The format of the cmx command is:

cmx

—-h

-ofile

—tmin

—|

Uline-1 line-2 line-n...

Prints help message for the cmx command.

—-ofile

Saves output diagnostics in file .

—tmin

Specifies how many minutes you want the cmx command to
exercise the communications system.

If you do not specify the

—~t option, the cmx command runs until you terminate it by
pressing CTRL/C in the foreground.

—| line-n

Specifies the line or lines you want to test.

The values for line-

n are found in the /dev directory and are the last two characters
of the tty device name.

For example, if you want to test the

communications system for a device named tty02, tty03, and

ttyl4, line-1 is 02, line-2 is 03, and line-3 is 14.

Additionally,

the line-n argument can specify a range of lines to test, such as
00-08.

You cannot test pseudodevice lines or lta device lines.

Pseudodevices have

ap,q,r s, tor uas the first character after tty, such as ttyp3.

devices have a major number of 39.

4-2

Exercising

Network and Communications Systems

The Ita

The following examples show how to use the cmx command.

The first

example exercises communications lines tty22 and tty34 for 45 minutes in

the background.

The second example exercises lines tty00 through tty07

until you press CTRL/C.
#

cmx

-1

cmx

-1

00-07

-t45

Exercising

Network and Communications Systems 4-3

Index

cmx exerciser, 4-2 to 4-3

line printer

Ita lines and, 4-2

pseudodevice lines and, 4-2

testing, 3-4

Ipx exerciser, 3-4 to 3-5
line printer queue and, 3-4n

D
disk drive
testing, 3-1

magnetic tape drive

dskx exerciser, 3-1 to 3-2
-c option and, 3-lc

testing,. 3-2
memory

chpt command and, 3-1c
-p option and, 3-1c

testing, 2-2

memx exerciser
swap space and, 2-2n

mtx exerciser, 3-2 to 3-4

file system

testing, 2-1

fsx exerciser

netx exerciser, 4-1 to 4-2

and, 2-1c

echo TCP service and, 4-1
miscd utility and, 4-1

S
IP network
testing, 4-1

shmx exerciser
memx and, 2-3

shmxb and, 2-3

syscript command
testsuite file and,

1-2

system

testing, 1-2
system exerciser

description, 1-1 to 1-3
diagnostics, 1-3
help facility

in a diskless environment, 1-1n
requirements, 1-2

TCP network
testing, 4-1

terminal communications system
testing, 4-2

iIndex-2

HOW TO ORDER ADDITIONAL DOCUMENTATION

DIRECT TELEPHONE ORDERS
In Continental USA

In Canada

and New Hampshire,
Alaska or Hawaii
call 800-DIGITAL

call 800-267-6215

DIRECT MAIL ORDERS (U.S. and Puerto Rico*)
DIGITAL EQUIPMENT CORPORATION
P.O. Box CS2008
Nashua, New Hampshire 03061

DIRECT MAIL ORDERS (Canada)
DIGITAL EQUIPMENT OF CANADA LTD.

100 Herzberg Road
Kanata, Ontario K2K 2A6
Attn: Direct Order Desk

INTERNATIONAL
DIGITAL EQUIPMENT CORPORATION

PSG Business Manager
c/o Digital's local subsidiary
or approved distributor

Internal orders should be placed through the Software Distribution Center (SDC), Digital
Equipment Corporation, Westminster, Massachusetts 01473
*Any prepaid order from Puerto Rico must be placed
with the Local Digital Subsidiary:

809-754-7575

ULTRIX - 32
Guide to System
Exercisers
AA-ME96A-TE

Reader’s Comments
Note: This form is for document comments only. DIGITAL will use comments

submitted on this form at the company’s discretion. If you require a written reply and are eligible to receive one under Software Performance

Report (SPR) service, submit your comments on an SPR form.

Did you find this manual understandable, usable, and well-organized? Please
make suggestions for improvement.

Did you find errors in this manual? If so, specify the error and the page number.

Please indicate the type of user/reader that you most nearly represent.

(]

Assembly language programmer

(]

Higher-level language programmer

[

Occasional programmer (experienced)

User with little programming experience

[J]

Student programmer

Other (please specify)

Name

Date

Organization

Street

City

State

lemg ode
Country

if Mailed in the
Necessary

United States

BUSINESS REPLY MAIL
FIRST CLASS PERMIT NO.33 MAYNARD MASS.

POSTAGE WILL BE PAID BY ADDRESSEE

Digital Equipment Corporation
Documentation Manager
ULTRIX Documentation Group
ZKO3-3/X18

Spit Brook Road
Nashua, N.H.
03063

U
S

Cut Along Dotted Line

No Postage