Cypress CSC-1200T Guía de usuario Pagina 56
- Pagina / 124
- Tabla de contenidos
- MARCADORES
Valorado. / 5. Basado en revisión del cliente
56 Cray T3E User’s Guide
6.5 C compiler directives (#pragma)
The #pragma directives are used within the source program to request
certain kinds of special processing. The #pragma directives are exten-
sions to the C and C++ standards. They are classified according to the
following types:
• general
• template instantiation (Cray C++ only)
• scalar
• tasking
• inlining.
You can control the compiler analysis of your source code by using
#pragma directives. The #pragma directives have the following form:
#pragma [_CRI] identifier [arguments]
In the specification, the macro expansion is applied only to arguments.
The _CRI specification is optional and ensures that the compiler will
issue a message concerning any directives that it does not recognize.
Diagnostics are not generated for any directives that do not contain the
_CRI specification.
To ensure that your directives are seen only by Cray Research compilers,
you should use the following coding technique, where identifier repre-
sents the name of the directive:
#if _CRAYC
#pragma _CRI identifier
#endif
The following sections describe the most useful #pragma directives in
the Cray T3E environment. They are all classified as scalar directives
and used for code optimization.
cache_align
The cache_align directive aligns a variable on a cache-line boundary.
This is useful for frequently referenced variables.
The first-level cache (DCACHE) line consists of four 64-bit words which
are loaded from the memory to the cache whenever any of the words
is referenced. By using the directive you can be sure that a specified
memory location is loaded to the first word of a cache-line.
The effect of the cache_align directive is independent of its position
in the source code. It can appear in global or local scope. The format of
the directive is as follows:
#pragma _CRI cache_align var_list
- Cray T3E 1
- User’s Guide 1
- Cray T3E User’s Guide 3 3
- Contents 4
- Contents 5 5
- B Glossary 113 6
- Bibliography 118 6
- Index 120 6
- Introduction 7
- 1.2 Usage policy 8
- 1.3 Overview of the system 9
- 1.4 Programming environment 9
- 10 Cray T3E User’s Guide 10
- Chapter 1. Introduction 11 11
- 12 Cray T3E User’s Guide 12
- Using the Cray T3E at CSC 13
- 2.2 Files 14
- 2.3 Editing files 16
- 2.5 Executing in batch mode 17
- 2.6 More information 18
- The Cray T3E system 20
- 3.2 Distributed memory 21
- 3.3 Processing elements 21
- 3.4 Processor architecture 23
- 3.5 Local memory hierarchy 24
- 26 Cray T3E User’s Guide 26
- Processing Element 27
- I/O Controller 27
- Interconnection 27
- Network 27
- 3.9 File systems 28
- 3.10 Resource monitoring 29
- 30 Cray T3E User’s Guide 30
- 3.11 More information 31
- Program development 32
- 4.3.1 BLAS 34
- 4.3.2 LAPACK 34
- 4.3.3 BLACS 35
- 4.3.4 PBLAS and ScaLAPACK 35
- 4.3.5 Details 35
- 36 Cray T3E User’s Guide 36
- 4.6 More information 38
- Fortran programming 40
- 5.2 Basic usage 41
- 5.4 Compiler options 42
- 5.5 Optimization options 42
- 5.6 Optimizing for cache 44
- 5.7 Compiler directives 45
- 5.8 Fortran 90 modules 48
- 5.9 Source code preprocessing 49
- 5.10 More information 51
- C and C++ programming 52
- 6.2 The C compiler 53
- 6.3 Calling Fortran from C 54
- 6.4 C compiler options 55
- #pragma _CRI symmetric var 59
- #pragma _CRI unroll [n] 59
- 6.6 The C++ compiler 61
- 6.7 More information 61
- Interprocess communication 62
- 7.2.1 Format of the MPI calls 63
- 7.2.2 Some MPI routines 64
- 7.2.3 An example of using MPI 64
- 7.2.5 MPI data types 67
- 7.3.1 Using PVM on the T3E 68
- #include <mpp/shmem.h> 71
- INCLUDE ’mpp/shmem.fh’ 71
- 7.4.2 Data addresses 72
- 7.4.4 Reduction routines 74
- 7.4.6 Example of using SHMEM 76
- 78 Cray T3E User’s Guide 78
- 0:c= 10121416 78
- 1:c= 2468 78
- 80 Cray T3E User’s Guide 80
- Batch queuing system 81
- 82 Cray T3E User’s Guide 82
- # QSUB -l p_mpp_t=7000 82
- 8.3 Status of the NQE job 83
- 84 Cray T3E User’s Guide 84
- 8.4 Deleting an NQE batch job 86
- 8.5 Queues 86
- 8.6 More information 87
- Programming tools 88
- 9.2 Program Browser 89
- 9.3 Debugging programs 92
- 9.3.2 Examining core files 93
- 94 Cray T3E User’s Guide 94
- 9.4.1 MPP Apprentice 95
- 9.4.2 The appview command 98
- 9.4.3 PAT 98
- 9.5.1 The VAMPIRtrace library 100
- 102
- 9.5.3 More information 103
- Miscellaneous notes 104
- 10.1.3 The CPU clock timer 105
- 10.1.4 Example of timing 106
- 108 Cray T3E User’s Guide 108
- 10.4 More information 110
- About CSC 111
- 112 Cray T3E User’s Guide 112
- Glossary 113
- 114 Cray T3E User’s Guide 114
- Appendix B. Glossary 115 115
- Metacomputer Environment 116
- Bibliography 118
Relacionado con productos y manuales para Receptor Cypress CSC-1200T
Receptor Cypress COH-Tx Manual de usuario
(12 paginas)
(12 paginas)
Receptor Cypress CWHDI-TX Especificaciones
(12 paginas)
(12 paginas)
Receptor Cypress CH-107 TX Manual de usuario
(16 paginas)
(16 paginas)
Receptor Cypress CH-506RX Especificaciones
(16 paginas)
(16 paginas)
Receptor Cypress COH-Tx Especificaciones
(16 paginas)
(16 paginas)
Receptor Cypress COH-Rx1 Especificaciones
(16 paginas)
(16 paginas)
Receptor Cypress CWHDI-RX Especificaciones
(12 paginas)
(12 paginas)
Receptor Cypress CSC-1200T Manual de usuario
(12 paginas)
(12 paginas)
Receptor Cypress CA-DVI100R Manual de usuario
(12 paginas)
(12 paginas)
Receptor Cypress CH-506RX Especificaciones
(24 paginas)
(24 paginas)
© 2020, manymanuals.es. Todos los derechos reservados | 0.091 s |
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Comentarios a estos manuales