/[MITgcm]/MITgcm/eesupp/src/gsum.F
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Contents of /MITgcm/eesupp/src/gsum.F

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Revision 1.7 - (show annotations) (download)
Sat Mar 27 03:51:51 2004 UTC (20 years, 2 months ago) by edhill
Branch: MAIN
CVS Tags: checkpoint57m_post, checkpoint57g_pre, checkpoint57s_post, checkpoint58b_post, checkpoint57b_post, checkpoint57g_post, checkpoint56b_post, checkpoint57y_post, checkpoint54d_post, checkpoint54e_post, checkpoint57r_post, checkpoint57d_post, checkpoint57i_post, checkpoint59, checkpoint58, checkpoint55, checkpoint54, checkpoint57, checkpoint56, checkpoint53, checkpoint58f_post, checkpoint57n_post, checkpoint58d_post, checkpoint58a_post, checkpoint57z_post, checkpoint54f_post, checkpoint58y_post, checkpoint58t_post, checkpoint55i_post, checkpoint58m_post, checkpoint57l_post, checkpoint57t_post, checkpoint55c_post, checkpoint57v_post, checkpoint57f_post, checkpoint53d_post, checkpoint60, checkpoint61, checkpoint57a_post, checkpoint57h_pre, checkpoint54b_post, checkpoint58w_post, checkpoint57h_post, checkpoint52m_post, checkpoint57y_pre, checkpoint55g_post, checkpoint58o_post, checkpoint57c_post, checkpoint58p_post, checkpoint58q_post, checkpoint55d_post, checkpoint58e_post, mitgcm_mapl_00, checkpoint54a_pre, checkpoint53c_post, checkpoint55d_pre, checkpoint57c_pre, checkpoint58r_post, checkpoint55j_post, checkpoint54a_post, checkpoint55h_post, checkpoint58n_post, checkpoint57e_post, checkpoint55b_post, checkpoint53a_post, checkpoint59q, checkpoint59p, checkpoint59r, checkpoint59e, checkpoint59d, checkpoint59g, checkpoint59f, checkpoint59a, checkpoint55f_post, checkpoint59c, checkpoint59b, checkpoint59m, checkpoint59l, checkpoint59o, checkpoint59n, checkpoint59i, checkpoint59h, checkpoint59k, checkpoint53g_post, checkpoint57p_post, checkpint57u_post, checkpoint57q_post, eckpoint57e_pre, checkpoint58k_post, checkpoint58v_post, checkpoint56a_post, checkpoint58l_post, checkpoint53f_post, checkpoint57h_done, checkpoint57j_post, checkpoint57f_pre, checkpoint61f, checkpoint58g_post, checkpoint58x_post, checkpoint61n, checkpoint52n_post, checkpoint53b_pre, checkpoint59j, checkpoint58h_post, checkpoint56c_post, checkpoint58j_post, checkpoint57a_pre, checkpoint55a_post, checkpoint57o_post, checkpoint61q, checkpoint57k_post, checkpoint53b_post, checkpoint57w_post, checkpoint61e, checkpoint58i_post, checkpoint57x_post, checkpoint58c_post, checkpoint58u_post, checkpoint53d_pre, checkpoint58s_post, checkpoint55e_post, checkpoint61g, checkpoint61d, checkpoint54c_post, checkpoint61b, checkpoint61c, checkpoint61a, checkpoint61o, checkpoint61l, checkpoint61m, checkpoint61j, checkpoint61k, checkpoint61h, checkpoint61i, checkpoint61t, checkpoint61r, checkpoint61s, checkpoint61p
Changes since 1.6: +3 -3 lines 
 o cleanup comments (NO CODE CHANGES) in eesupp for protex
 o the "api reference" framework now builds documentation for:
     eesupp, pkg/generic_advdiff, and pkg/gmredi
 o remove mnc from the default gfd in pkg_groups pending
     further testing on systems where NetCDF is not installed
1 C $Header: /u/gcmpack/MITgcm/eesupp/src/gsum.F,v 1.6 2001/09/21 03:54:35 cnh Exp $
2 C $Name: $
3 #include "CPP_EEOPTIONS.h"
4
5 CBOP
6
7 C !ROUTINE: GSUM_R8_INIT
8
9 C !INTERFACE:
10 SUBROUTINE GSUM_R8_INIT( myThid )
11 IMPLICIT NONE
12
13 C !DESCRIPTION:
14 C *=============================================================================*
15 C | SUBROUTINE GSUM\_R8\_INIT
16 C | o Setup data structures for global sum.
17 C *=============================================================================*
18 C | Fast true shared memory form for global sum operation.
19 C *=============================================================================*
20
21 C !USES:
22 #include "SIZE.h"
23 #include "EEPARAMS.h"
24 #include "EESUPPORT.h"
25 C GSR8_value :: Global data for accumulating sum elements.
26 C GSR8_level :: Cyclic buffer index into global data sum elements.
27 COMMON /GS_R8_BUFFER_R/
28 & GSR8_value
29 Real*8 GSR8_value(lShare8,MAX_NO_THREADS)
30 #define _NOT_SET_ 1.23456D12
31 COMMON /GS_R8_BUFFER_I/
32 & GSR8_level
33 INTEGER GSR8_level
34
35 C !INPUT PARAMETERS:
36 C myThid :: Thread number of this instance.
37 INTEGER myThid
38
39 C !LOCAL VARIABLES:
40 C I :: Loop counter.
41 INTEGER I
42 CEOP
43 GSR8_level = 1
44 DO I = 1, lShare8
45 GSR8_value(I,myThid) = _NOT_SET_
46 ENDDO
47 C
48 RETURN
49 END
50
51 CBOP
52 C !ROUTINE: GSUM_R8
53
54 C !INTERFACE:
55 SUBROUTINE GSUM_R8( myPhi, answer, myThid )
56 IMPLICIT NONE
57 C !DESCRIPTION:
58 C *=============================================================================*
59 C | SUBROUTINE GSUM\_R8
60 C | o Perform global sum.
61 C *=============================================================================*
62 C | Fast true shared memory form for global sum operation.
63 C *=============================================================================*
64 C !USES:
65 #include "SIZE.h"
66 #include "EEPARAMS.h"
67 #include "EESUPPORT.h"
68 C GSR8_value :: Global data for accumulating sum elements.
69 C GSR8_level :: Cyclic buffer index into global data sum elements.
70 COMMON /GS_R8_BUFFER_R/
71 & GSR8_value
72 Real*8 GSR8_value(lShare8,MAX_NO_THREADS)
73 #define _NOT_SET_ 1.23456D12
74 COMMON /GS_R8_BUFFER_I/
75 & GSR8_level
76 INTEGER GSR8_level
77 C
78
79 C !INPUT/OUTPUT PARAMETERS:
80 C myPhi :: This threads contribution
81 C answer :: Result of sum over all threads
82 C myThid :: This threads id number
83 Real*8 myPhi
84 Real*8 answer
85 INTEGER myThid
86 #ifdef ALLOW_USE_MPI
87 Real*8 tmp, sumPhi
88 INTEGER mpiRc
89 #endif
90 C
91 C !LOCAL VARIABLES:
92 C nDone :: Counter for number of threads completed.
93 C I :: Loop counter.
94 C curLev :: Cyclic global sum buffer levels.
95 C prevLev
96 INTEGER nDone
97 INTEGER I
98 INTEGER curLev, prevLev
99 C
100 CEOP
101
102 C answer = 1.
103 C CALL BAR2(myThid)
104 C CALL BAR2(myThid)
105 C CALL BAR2(myThid)
106 C RETURN
107 C
108 IF ( myThid .NE. 1 ) THEN
109
110 curLev = GSR8_level
111 GSR8_value(curLev,myThid) = myPhi
112 10 CONTINUE
113 IF ( GSR8_value(curLev,1) .NE. _NOT_SET_ ) GOTO 11
114 CALL FOOL_THE_COMPILER( GSR8_value )
115 GOTO 10
116 11 CONTINUE
117 GSR8_value(curLev,myThid) = _NOT_SET_
118 answer = GSR8_value(curLev,1)
119
120 ELSE
121
122 curLev = GSR8_level
123 prevLev = curLev+1
124 IF ( prevLev .GT. 2 ) prevLev = 1
125
126 12 CONTINUE
127 CALL FOOL_THE_COMPILER( GSR8_value )
128 nDone = 1
129 DO I = 2, nThreads
130 IF ( GSR8_value(curLev,I) .NE. _NOT_SET_ ) nDone = nDone+1
131 ENDDO
132 IF ( nDone .LT. nThreads ) GOTO 12
133
134 GSR8_level = prevLev
135 CALL FOOL_THE_COMPILER( GSR8_value )
136 GSR8_value(prevLev,1) = _NOT_SET_
137
138 answer = myPhi
139 DO I = 2,nThreads
140 answer = answer+GSR8_value(curLev,I)
141 ENDDO
142
143 #ifdef ALLOW_USE_MPI
144 #ifndef ALWAYS_USE_MPI
145 IF ( usingMPI ) THEN
146 #endif
147 tmp = answer
148 CALL MPI_Allreduce(tmp,sumPhi,1,MPI_DOUBLE_PRECISION,MPI_SUM,
149 & MPI_COMM_MODEL,mpiRC)
150 answer = sumPhi
151 #ifndef ALWAYS_USE_MPI
152 ENDIF
153 #endif
154 #endif /* ALLOW_USE_MPI */
155
156 GSR8_value(curLev,1) = answer
157
158 ENDIF
159 C
160 RETURN
161 END
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