/[MITgcm]/MITgcm/verification/exp4/code/CPP_EEOPTIONS.h_mpi
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revision 1.2 by adcroft, Wed Jan 21 21:10:01 2004 UTC revision 1.3 by jmc, Mon May 18 19:32:49 2009 UTC
# Line 1  Line 1 
1  C $Header$  C $Header$
2  C $Name$  C $Name$
3    
4    CBOP
5    C     !ROUTINE: CPP_EEOPTIONS.h
6    C     !INTERFACE:
7    C     include "CPP_EEOPTIONS.h"
8  C  C
9  C     /==========================================================\  C     !DESCRIPTION:
10  C     | CPP_EEOPTIONS.h                                          |  C     *==========================================================*
11  C     |==========================================================|  C     | CPP\_EEOPTIONS.h                                         |
12    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        |
15  C     | execution environment in which a model runs - as opposed |  C     | execution environment in which a model runs - as opposed |
# Line 22  C     |       set all options as selecta Line 28  C     |       set all options as selecta
28  C     |       once an experimental configuration has been        |  C     |       once an experimental configuration has been        |
29  C     |       identified, rebuild the code with the appropriate  |  C     |       identified, rebuild the code with the appropriate  |
30  C     |       options set at compile time.                       |  C     |       options set at compile time.                       |
31  C     \==========================================================/  C     *==========================================================*
32    CEOP
33    
34  #ifndef _CPP_EEOPTIONS_H_  #ifndef _CPP_EEOPTIONS_H_
35  #define _CPP_EEOPTIONS_H_  #define _CPP_EEOPTIONS_H_
# Line 39  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--   Flag used to indicate whether Fortran formatted write
50  C     and read are threadsafe. On SGI the routines can be thread  C     and read are threadsafe. On SGI the routines can be thread
51  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
52  C     undef this option.  C     undef this option.
53  #undef  FMTFTN_IO_THREADSAFE  #undef FMTFTN_IO_THREAD_SAFE
54    
55    C--   Flag used to indicate whether Binary write to Local file (i.e.,
56    C     a different file for each tile) and read are thread-safe.
57    #undef LOCBIN_IO_THREAD_SAFE
58    
59    C--   Flag to turn off the writing of error message to ioUnit zero
60    #undef DISABLE_WRITE_TO_UNIT_ZERO
61    
62    C--   Flag to turn on checking for errors from all threads and procs
63    C     (calling S/R STOP_IF_ERROR) before stopping.
64    #define USE_ERROR_STOP
65    
66    C--   Flag turns off MPI_SEND ready_to_receive polling in the
67    C     gather_* subroutines to speed up integrations.
68    #undef DISABLE_MPI_READY_TO_RECEIVE
69    
70  C--   Control MPI based parallel processing  C--   Control MPI based parallel processing
71  #define ALLOW_USE_MPI  CXXX We no longer select the use of MPI via this file (CPP_EEOPTIONS.h)
72  #define ALWAYS_USE_MPI  CXXX To use MPI, use an appropriate genmake2 options file or use
73    CXXX genmake2 -mpi .
74    CXXX #undef  ALLOW_USE_MPI
75    CXXX #undef  ALWAYS_USE_MPI
76    
77  C--   Control use of communication that might overlap computation.  C--   Control use of communication that might overlap computation.
78  C     Under MPI selects/deselects "non-blocking" sends and receives.  C     Under MPI selects/deselects "non-blocking" sends and receives.
79  #define ALLOW_ASYNC_COMMUNICATION  #define ALLOW_ASYNC_COMMUNICATION
# Line 74  C     boosting performance because of a Line 99  C     boosting performance because of a
99  C     set size. However, on vector CRAY systems this degrades  C     set size. However, on vector CRAY systems this degrades
100  C     performance.  C     performance.
101  #define REAL4_IS_SLOW  #define REAL4_IS_SLOW
102    
103  C--   Control use of "double" precision constants.  C--   Control use of "double" precision constants.
104  C     Use D0 where it means REAL*8 but not where it means REAL*16  C     Use D0 where it means REAL*8 but not where it means REAL*16
105  #define D0 d0  #define D0 d0
106    
107  C--   Control XY periodicity in processor to grid mappings  C--   Control XY periodicity in processor to grid mappings
108  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
109  C           periodic because it has overlap regions for every box.  C           periodic because it has overlap regions for every box.
110  C           Model assume that these values have been  C           Model assume that these values have been
111  C           filled in some way.  C           filled in some way.
# Line 89  C           filled in some way. Line 114  C           filled in some way.
114  #define CAN_PREVENT_X_PERIODICITY  #define CAN_PREVENT_X_PERIODICITY
115  #define CAN_PREVENT_Y_PERIODICITY  #define CAN_PREVENT_Y_PERIODICITY
116    
117    C--   Alternative formulation of BYTESWAP, faster than
118    C     compiler flag -byteswapio on the Altix.
119    #undef FAST_BYTESWAP
120    
121    C--   Alternative way of doing global sum without MPI allreduce call
122    C     but instead, explicit MPI send & recv calls.
123    #define GLOBAL_SUM_SEND_RECV
124    
125    C--   Alternative way of doing global sum on a single CPU
126    C     to eliminate tiling-dependent roundoff errors.
127    C     Note: This is slow.
128    #undef  CG2D_SINGLECPU_SUM
129    
130  #endif /* _CPP_EEOPTIONS_H_ */  #endif /* _CPP_EEOPTIONS_H_ */
131    
132  #include "CPP_EEMACROS.h"  #include "CPP_EEMACROS.h"
133    
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