/[MITgcm]/MITgcm/eesupp/inc/CPP_EEOPTIONS.h
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revision 1.18 by cnh, Fri Sep 21 03:54:35 2001 UTC revision 1.36 by dimitri, Sat Sep 28 19:09:38 2013 UTC
# Line 1  Line 1 
1  C $Header$  C $Header$
2  C $Name$  C $Name$
3    
   These lines are here to deliberately cause a compile-time error.  
   If you see these lines in your .F files or the compiler shows them  
   as an error then it means you have not placed your configuration  
   files in the appropriate place.  
   You need to place you own copy of CPP_EEOPTIONS.h in the include  
   path for the model.  
   
4  CBOP  CBOP
5  C     !ROUTINE: CPP_EEOPTIONS.h  C     !ROUTINE: CPP_EEOPTIONS.h
6  C     !INTERFACE:  C     !INTERFACE:
# Line 15  C     include "CPP_EEOPTIONS.h" Line 8  C     include "CPP_EEOPTIONS.h"
8  C  C
9  C     !DESCRIPTION:  C     !DESCRIPTION:
10  C     *==========================================================*  C     *==========================================================*
11  C     | CPP_EEOPTIONS.h                                          |  C     | CPP\_EEOPTIONS.h                                         |
12  C     *==========================================================*  C     *==========================================================*
13  C     | C preprocessor "execution environment" supporting        |  C     | C preprocessor "execution environment" supporting        |
14  C     | flags. Use this file to set flags controlling the        |  C     | flags. Use this file to set flags controlling the        |
# Line 53  C Line 46  C
46  C     ALWAYS - indicates the choice will be fixed at compile time  C     ALWAYS - indicates the choice will be fixed at compile time
47  C              so no run-time option will be present  C              so no run-time option will be present
48    
49  C     Flag used to indicate whether Fortran formatted write  C=== Macro related options ===
50    C--   Control storage of floating point operands
51    C     On many systems it improves performance only to use
52    C     8-byte precision for time stepped variables.
53    C     Constant in time terms ( geometric factors etc.. )
54    C     can use 4-byte precision, reducing memory utilisation and
55    C     boosting performance because of a smaller working set size.
56    C     However, on vector CRAY systems this degrades performance.
57    C     Enable to switch REAL4_IS_SLOW from genmake2 (with LET_RS_BE_REAL4):
58    #ifdef LET_RS_BE_REAL4
59    #undef REAL4_IS_SLOW
60    #else /* LET_RS_BE_REAL4 */
61    #define REAL4_IS_SLOW
62    #endif /* LET_RS_BE_REAL4 */
63    
64    C--   Control use of "double" precision constants.
65    C     Use D0 where it means REAL*8 but not where it means REAL*16
66    #define D0 d0
67    
68    C--   Enable some old macro conventions for backward compatibility
69    #undef USE_OLD_MACROS_R4R8toRSRL
70    
71    C=== IO related options ===
72    C--   Flag used to indicate whether Fortran formatted write
73  C     and read are threadsafe. On SGI the routines can be thread  C     and read are threadsafe. On SGI the routines can be thread
74  C     safe, on Sun it is not possible - if you are unsure then  C     safe, on Sun it is not possible - if you are unsure then
75  C     undef this option.  C     undef this option.
76  #undef  FMTFTN_IO_THREADSAFE  #undef FMTFTN_IO_THREAD_SAFE
77    
78    C--   Flag used to indicate whether Binary write to Local file (i.e.,
79    C     a different file for each tile) and read are thread-safe.
80    #undef LOCBIN_IO_THREAD_SAFE
81    
82    C--   Flag to turn off the writing of error message to ioUnit zero
83    #undef DISABLE_WRITE_TO_UNIT_ZERO
84    
85    C--   Alternative formulation of BYTESWAP, faster than
86    C     compiler flag -byteswapio on the Altix.
87    #undef FAST_BYTESWAP
88    
89    C--   Flag defined for eeset_parms.F and open_copy_data_file.F
90    C     to write scratch files from process 0 only
91    #undef SINGLE_DISK_IO
92    
93    C=== MPI, EXCH and GLOBAL_SUM related options ===
94    C--   Flag turns off MPI_SEND ready_to_receive polling in the
95    C     gather_* subroutines to speed up integrations.
96    #undef DISABLE_MPI_READY_TO_RECEIVE
97    
98  C--   Control MPI based parallel processing  C--   Control MPI based parallel processing
99  #undef  ALLOW_USE_MPI  CXXX We no longer select the use of MPI via this file (CPP_EEOPTIONS.h)
100  #undef  ALWAYS_USE_MPI  CXXX To use MPI, use an appropriate genmake2 options file or use
101    CXXX genmake2 -mpi .
102    CXXX #undef  ALLOW_USE_MPI
103    
104  C--   Control use of communication that might overlap computation.  C--   Control use of communication that might overlap computation.
105  C     Under MPI selects/deselects "non-blocking" sends and receives.  C     Under MPI selects/deselects "non-blocking" sends and receives.
106  #define ALLOW_ASYNC_COMMUNICATION  #define ALLOW_ASYNC_COMMUNICATION
# Line 76  C     Under MPI selects/deselects "block Line 114  C     Under MPI selects/deselects "block
114  C--   Control use of JAM routines for Artic network  C--   Control use of JAM routines for Artic network
115  C     These invoke optimized versions of "exchange" and "sum" that  C     These invoke optimized versions of "exchange" and "sum" that
116  C     utilize the programmable aspect of Artic cards.  C     utilize the programmable aspect of Artic cards.
117  #undef  LETS_MAKE_JAM  CXXX No longer supported ; started to remove JAM routines.
118  #undef  JAM_WITH_TWO_PROCS_PER_NODE  CXXX #undef  LETS_MAKE_JAM
119    CXXX #undef  JAM_WITH_TWO_PROCS_PER_NODE
 C--   Control storage of floating point operands  
 C     On many systems it improves performance only to use  
 C     8-byte precision for time stepped variables.  
 C     Constant in time terms ( geometric factors etc.. )  
 C     can use 4-byte precision, reducing memory utilisation and  
 C     boosting performance because of a smaller working  
 C     set size. However, on vector CRAY systems this degrades  
 C     performance.  
 #define REAL4_IS_SLOW  
   
 C--   Control use of "double" precision constants.  
 C     Use D0 where it means REAL*8 but not where it means REAL*16  
 #define D0 d0  
120    
121  C--   Control XY periodicity in processor to grid mappings  C--   Control XY periodicity in processor to grid mappings
122  C     Note: Model code does not need to know whether a domain is  C     Note: Model code does not need to know whether a domain is
123  C           periodic because it has overlap regions for every box.  C           periodic because it has overlap regions for every box.
124  C           Model assume that these values have been  C           Model assume that these values have been
125  C           filled in some way.  C           filled in some way.
# Line 103  C           filled in some way. Line 128  C           filled in some way.
128  #define CAN_PREVENT_X_PERIODICITY  #define CAN_PREVENT_X_PERIODICITY
129  #define CAN_PREVENT_Y_PERIODICITY  #define CAN_PREVENT_Y_PERIODICITY
130    
131    C--   disconnect tiles (no exchange between tiles, just fill-in edges
132    C     assuming locally periodic subdomain)
133    #undef DISCONNECTED_TILES
134    
135    C--   Alternative way of doing global sum without MPI allreduce call
136    C     but instead, explicit MPI send & recv calls.
137    #undef GLOBAL_SUM_SEND_RECV
138    
139    C--   Alternative way of doing global sum on a single CPU
140    C     to eliminate tiling-dependent roundoff errors.
141    C     Note: This is slow.
142    #undef  CG2D_SINGLECPU_SUM
143    
144    C=== Other options (to add/remove pieces of code) ===
145    C--   Flag to turn on checking for errors from all threads and procs
146    C     (calling S/R STOP_IF_ERROR) before stopping.
147    #define USE_ERROR_STOP
148    
149    C--   Control use of communication with other component:
150    C     allow to import and export from/to Coupler interface.
151    #undef COMPONENT_MODULE
152    
153  #endif /* _CPP_EEOPTIONS_H_ */  #endif /* _CPP_EEOPTIONS_H_ */
154    
155  #include "CPP_EEMACROS.h"  #include "CPP_EEMACROS.h"
156    

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