ATL AM64/128A manuali

Atl AM64/128A Manuale Utente (144 pagine)

Marchio: Atl | Categoria: Networking | Dimensione: 0.67 MB |

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Optimizing software in C++

1

1 Introduction

3

Graphics accelerators

5

Programmable logic devices

5

2.2 Choice of microprocessor

5

2.5 Choice of compiler

9

Microsoft Visual Studio

9

Intel C++ compiler

9

PathScale

10

Digital Mars

10

Open Watcom

10

Codeplay VectorC

11

Comments

11

Portability

14

Development time

14

Security

14

3.3 Program installation

18

3.4 Program loading

18

3.6 File access

20

3.7 System database

21

3.9 Network access

21

3.10 Memory access

21

3.11 Context switches

22

3.12 Dependency chains

22

4 Performance and usability

23

Storage on the stack

25

Global or static storage

25

Register storage

26

Volatile

27

Thread-local storage

27

Dynamic memory allocation

27

Integer sizes

28

Integer operators

29

6.4 Enums

32

6.5 Booleans

32

Boolean vector operations

34

6.6 Pointers and references

34

Pointers versus references

34

Efficiency

35

Pointer arithmetic

35

6.7 Function pointers

35

6.8 Member pointers

36

6.9 Arrays

36

6.10 Type conversions

38

Signed / unsigned conversion

38

Integer size conversion

38

Integer to float conversion

39

Float to integer conversion

39

Pointer type conversion

40

Const cast

40

Static cast

40

Reinterpret cast

40

Dynamic cast

41

Converting class objects

41

6.12 Loops

42

Loop unrolling

43

The loop control condition

44

Copying or clearing arrays

44

6.13 Functions

45

Avoid unnecessary functions

45

Use inline functions

46

Use fastcall functions

46

Make functions static

47

Use 64-bit mode

47

6.14 Structures and classes

47

6.19 Inheritance

50

6.21 Unions

51

6.22 Bitfields

51

6.23 Overloaded functions

52

6.24 Overloaded operators

52

6.25 Templates

52

6.26 Threads

55

6.27 Exception handling

56

6.30 Namespaces

59

7.1 How compilers optimize

60

Function inlining

60

Pointer elimination

61

Register variables

61

Live range analysis

62

Join identical branches

62

Eliminate jumps

63

Loop invariant code motion

64

Induction variables

65

Scheduling

66

Algebraic reductions

66

Devirtualization

67

Pointer aliasing

71

Pure functions

72

Algebraic reduction

73

7.6 Optimization directives

76

Compiler-specific keywords

77

8 Optimizing memory access

81

8.5 Alignment of data

84

8.7 Container classes

87

8.8 Strings

89

8.9 Access data sequentially

89

8.11 Explicit cache control

92

Prefetching data

93

Uncached memory store

93

9 Using multiple CPU cores

94

10 Out of order execution

96

11 Using vector operations

98

11.1 Automatic vectorization

99

11.2 Explicit vectorization

101

Using intrinsic functions

101

Using vector classes

103

Redefining a vector class

104

Mixed vector types

107

Defining missing operators

107

Vectorized table lookup

113

CPU's

117

Disclaimer

122

13.1 Use lookup tables

123

13.2 Bounds checking

125

13.4 Integer multiplication

127

13.5 Integer division

128

13.6 Floating point division

130

14 Testing speed

136

_MSC_VER and not

141

__GNUC__ and not

141

16 Literature

143

Internet forums

144

Atl AM64/128A Manuale Utente (55 pagine)

Marchio: Atl | Categoria: Networking | Dimensione: 0.17 MB |

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Indice

AM64/128A

1

BASE BAND MODEM

1

USER MANUAL

1

AM64/128A User Manual

2

CONTENTS

3

1. INTRODUCTION

5

2. CONSTRUCTIONAL DETAILS

6

3. SYSTEM OVERVIEW

7

4. INSTALLATION

9

4.2 BBM to Line Card Link

11

5. MENU OPERATION

12

5.2 Front Panel Operation

13

5.3 Status Menu

14

5.3.2 Alarm Status

15

5.3.3 User Rate

16

5.3.4 Line Rate

16

5.3.5 Interface Status

16

5.3.6 Operating Mode

17

5.4 Test Menu

18

5.4.2 Loopback

19

5.4.3. Remote Loop

20

5.4.4 Binary Patterns

21

5.4.5 Data Test

22

1/ Error display

23

2/ Pattern display

24

3/ Transparency display

24

4/ Time display

24

5.4.6 In Service Test

25

5.4.7 Lamp Test

26

5.4.8 Self Test

26

Loop Active

27

Data Transfer

27

5.5 Rate Menu

28

Master or Slave

29

5.6 Option Menu

30

5.6.3 G.703

31

5.6.4 Asynchronous Mode

31

5.6.5 Signalling Rate

31

5.6.6 Character Length

32

5.7 Configuration Menu

33

5.7.5 64k Mode

36

5.7.6 Power Level

36

5.7.7 Menu Lock

36

GLOSSARY OF TERMS

37

GENERAL SPECIFICATIONS

39

SITS 89/43

40

Interface Modules

45

Interface Modules:

46

APPENDIX C - In Service Test

47

APPENDIX D - Approvals

49

APPENDIX E

50

Appendix F - Troubleshooting

53

ATL dispositivi