Cray CX1000 Guide de l'utilisateur Page 144
- Page / 169
- Table des matières
- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
Cray XMT™ Programming Environment User’s Guide
u Underflow. Traps underflows that occur. Underflows
produce a rounded result smaller in magnitude
than 0x0010000000000000, or about
2.225e-308.
x Inexact. Traps subnormal numbers.
max_readypool_retries n
Sets the maximum number n of retries that an idle thread can take
when checking random ready pools for new work.
mmap_buffer_size n
Sets the variable size of the persistent mmap buffers, where n is
the size in words. The maximum value, which is also the default,
is 16,777,216 words (16 GB). The size of the persistent buffers
determines how much tracing data can be gathered before requiring a
dump of the gathered data to the trace.out file.
must_dump_size n
Specifies the minimum number of words that must be present in a
trace buffer before allowing the trace buffer to dump to the mmap
buffer. The default value is 512 words. If an application terminates
prematurely and the trace.out file is missing information, reduce the
size of this buffer to force more frequent dumping.
num_procs n
Sets the maximum number of processors to use. This parameter is the
same as using the command mtarun -m n.
num_readypools n
Sets the maximum number n of ready pools available for the entire
task. Ready pools are used to schedule futures.
no_prereserve
Prevents the runtime from reserving 3 streams to use for attaching
the debugger.
144 S–2479–20
- S–2479–20 1
- Changes to this Document 5
- Compiler Overview [7] 75 8
- S–2479–20 9 9
- Glossary 167 10
- Procedures 10
- Examples 10
- Contents 11
- S–2479–20 11 11
- Introduction [1] 13
- 14 S–2479–20 14
- 2.1 Setting Up a Secure Shell 15
- 2.1.2 Additional Information 16
- 2.2 Using Modules 17
- 2.2.3 Module Commands 18
- Developing an Application [3] 19
- 3.2.1 Generic Functions 20
- S–2479–20 21 21
- 22 S–2479–20 22
- S–2479–20 23 23
- 3.2.2 Intrinsic Functions 24
- 3.3.2 Avoiding Deadlock 25
- 30 S–2479–20 30
- 3.5.2 Anonymous futures 34
- 3.7 File I/O 36
- 3.7.2 System-level I/O 39
- S–2479–20 43 43
- 44 S–2479–20 44
- 3.9 Debugging the Program 45
- 46 S–2479–20 46
- 48 S–2479–20 48
- 4.2 Persisting Shared Memory 49
- 52 S–2479–20 52
- S–2479–20 53 53
- 54 S–2479–20 54
- S–2479–20 55 55
- 56 S–2479–20 56
- 5.5 LUC Client/Server Example 60
- 5.6 Fast I/O Memory Usage 65
- 66 S–2479–20 66
- Library [6] 67
- a file at which to 68
- a file from which to 68
- in the file, a pointer 69
- 70 S–2479–20 70
- 6.4 Examples 71
- 74 S–2479–20 74
- Compiler Overview [7] 75
- 7.1 The Compilation Process 76
- S–2479–20 77 77
- Whole-program Compilation 78
- Separate-module Compilation 78
- S–2479–20 79 79
- 7.2 Invoking the Compiler 80
- 7.3 Setting the Compiler Mode 80
- 7.3.1 Whole-program Mode 81
- 7.3.2 Separate-module Mode 82
- 7.3.3 Mixed Mode 83
- 7.4 Inlining Functions 84
- S–2479–20 85 85
- 86 S–2479–20 86
- 7.7 Creating New Libraries 87
- 7.8 Compiler Messages 88
- #define NUMSTREAMS 40 89
- S–2479–20 89 89
- 90 S–2479–20 90
- Running an Application [8] 91
- 8.3 Improving Performance 93
- 94 S–2479–20 94
- Optional Optimizations [9] 95
- 100 S–2479–20 100
- Error Messages [A] 101
- S–2479–20 101 101
- 102 S–2479–20 102
- User Runtime Functions [B] 103
- 104 S–2479–20 104
- S–2479–20 105 105
- 106 S–2479–20 106
- S–2479–20 107 107
- 108 S–2479–20 108
- C.1 Compilation Directives 109
- 110 S–2479–20 110
- 114 S–2479–20 114
- S–2479–20 115 115
- S–2479–20 119 119
- S–2479–20 121 121
- 124 S–2479–20 124
- C.3 Semantic Assertions 125
- 126 S–2479–20 126
- C.4 Implementation Hints 130
- S–2479–20 131 131
- 132 S–2479–20 132
- Condition Codes [D] 133
- 134 S–2479–20 134
- S–2479–20 135 135
- 136 S–2479–20 136
- Data Types [E] 137
- 138 S–2479–20 138
- Keywords [F] 139
- 140 S–2479–20 140
- S–2479–20 141 141
- 142 S–2479–20 142
- MTA_PARAMS [G] 143
- 144 S–2479–20 144
- S–2479–20 145 145
- 146 S–2479–20 146
- LUC API Reference [H] 147
- H.3 LUC Methods 149
- H.3.2 stopService Method 150
- H.3.3 getMyEndpointID Method 150
- H.3.4 remoteCall Method 151
- 152 S–2479–20 152
- H.3.5 remoteCallSync Method 153
- 154 S–2479–20 154
- H.3.7 setConfigValue Method 155
- 156 S–2479–20 156
- S–2479–20 157 157
- H.3.8 getConfigValue Method 158
- H.4 LUC Type Definitions 159
- H.5 LUC Callback Functions 160
- S–2479–20 161 161
- H.6 LUC Return Codes 162
- S–2479–20 163 163
- 164 S–2479–20 164
- S–2479–20 165 165
- 166 S–2479–20 166
- Glossary 167
- 168 S–2479–20 168
- S–2479–20 169 169
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