1 |
C $Header: /u/gcmpack/models/MITgcmUV/eesupp/src/ini_threading_environment.F,v 1.5 1998/09/29 18:50:56 cnh Exp $ |
2 |
|
3 |
#include "CPP_EEOPTIONS.h" |
4 |
|
5 |
CStartOfInterface |
6 |
SUBROUTINE INI_THREADING_ENVIRONMENT |
7 |
C /==========================================================\ |
8 |
C | SUBROUTINE INI_THREADING_ENVIRONMENT | |
9 |
C | o Initialise multi-threaded environment. | |
10 |
C |==========================================================| |
11 |
C | Generally we do not start separate threads here. | |
12 |
C | The separate threads a spawned at later on. | |
13 |
C | Here we perform initialisation of data-structures | |
14 |
C | that indicate which of the nSx x nSy tiles a thread is | |
15 |
C | responsible for. | |
16 |
C | The multiple threads are spawned in the top level MAIN | |
17 |
C | routine. | |
18 |
C \==========================================================/ |
19 |
IMPLICIT NONE |
20 |
|
21 |
C == Global data == |
22 |
#include "SIZE.h" |
23 |
#include "EEPARAMS.h" |
24 |
#include "EESUPPORT.h" |
25 |
CEndOfInterface |
26 |
|
27 |
C == Local variables == |
28 |
C bXPerThread - Blocks of size sNx per thread. |
29 |
C byPerThread - Blocks of size sNy per thread. |
30 |
C Thid - Thread index. Temporary used in loops |
31 |
C which set per. thread values on a |
32 |
C cartesian grid. |
33 |
C bxLo, bxHi - Work vars. for thread index |
34 |
C byLo, byHi range. bxLo is the lowest i index |
35 |
C that a thread covers, bxHi is the |
36 |
C highest i index. byLo is the lowest |
37 |
C j index, byHi is the highest j index. |
38 |
C I, J - Loop counter |
39 |
C msgBuf - I/O buffer for reporting status information. |
40 |
C myThid - Dummy thread id for use in printed messages |
41 |
C ( this routine "INI_THREADING_ENVIRONMENT" is |
42 |
C called before multi-threading has started.) |
43 |
INTEGER bxPerThread |
44 |
INTEGER byPerThread |
45 |
INTEGER Thid |
46 |
INTEGER bxLo, bxHi |
47 |
INTEGER byLo, byHi |
48 |
INTEGER I, J, nT |
49 |
CHARACTER*(MAX_LEN_MBUF) msgBuf |
50 |
INTEGER myThid |
51 |
|
52 |
C-- Set default for all threads of having no blocks to |
53 |
C-- work on - except for thread 1. |
54 |
myBxLo(1) = 1 |
55 |
myBxHi(1) = nSx |
56 |
myByLo(1) = 1 |
57 |
myByHi(1) = nSy |
58 |
DO I = 2, MAX_NO_THREADS |
59 |
myBxLo(I) = 0 |
60 |
myBxHi(I) = 0 |
61 |
myByLo(I) = 0 |
62 |
myByHi(I) = 0 |
63 |
ENDDO |
64 |
myThid = 1 |
65 |
commName(COMM_NONE) = 'none' |
66 |
commName(COMM_MSG ) = 'messages' |
67 |
commName(COMM_PUT ) = 'put' |
68 |
commName(COMM_GET ) = 'get' |
69 |
|
70 |
C-- If there are multiple threads allocate different range of the |
71 |
C-- nSx*nSy blocks to each thread. |
72 |
C For now handle simple case of no. blocks nSx = n*nTx and |
73 |
C no. blocks nSy = m*nTy ( where m and n are integer ). This |
74 |
C is handled by simply mapping threads to blocks in sequence |
75 |
C with the x thread index moving fastest. |
76 |
C Later code which sets the thread number of neighboring blocks |
77 |
C needs to be consistent with the code here. |
78 |
nThreads = nTx * nTy |
79 |
|
80 |
C-- Initialise the barrier mechanisms |
81 |
C BAR2 will eventually replace barrier everywhere. |
82 |
CALL BARRIER_INIT |
83 |
DO I=1, MAX_NO_THREADS |
84 |
CALL BAR2_INIT(I) |
85 |
ENDDO |
86 |
|
87 |
C-- Initialise exchange mechanism |
88 |
CALL EXCH_INIT |
89 |
|
90 |
IF ( nThreads .NE. nTx*nTy ) THEN |
91 |
WRITE(msgBuf,'(A,A,A,I5,A,I5)') |
92 |
& 'S/R INI_THREADING_ENVIRONMENT:', |
93 |
& ' Total number of threads is not the same as nTx*nTy.', |
94 |
& ' nTx * nTy = ',nTx*nTy,' nThreads = ',nThreads |
95 |
CALL PRINT_ERROR(msgBuf, myThid) |
96 |
eeBootError = .TRUE. |
97 |
STOP 'ABNORMAL END: S/R INI_THREADING_ENVIRONMENT' |
98 |
ENDIF |
99 |
bxPerThread = nSx/nTx |
100 |
IF ( bxPerThread*nTx .NE. nSx ) THEN |
101 |
WRITE(msgBuf,'(A,A,A)') |
102 |
& 'S/R INI_THREADING_ENVIRONMENT:', |
103 |
& ' Number of blocks in X (nSx)', |
104 |
& ' must be exact multiple of threads in X (nTx).' |
105 |
CALL PRINT_ERROR(msgBuf, myThid) |
106 |
eeBootError = .TRUE. |
107 |
STOP 'ABNORMAL END: S/R INI_THREADING_ENVIRONMENT' |
108 |
ENDIF |
109 |
byPerThread = nSy/nTy |
110 |
IF ( byPerThread*nTy .NE. nSy ) THEN |
111 |
WRITE(msgBuf,'(A,A,A)') |
112 |
& 'S/R INI_THREADING_ENVIRONMENT:', |
113 |
& ' Number of blocks in Y (nSy)', |
114 |
& ' must be exact multiple of threads in Y (nTy).' |
115 |
CALL PRINT_ERROR(msgBuf, myThid) |
116 |
eeBootError = .TRUE. |
117 |
STOP 'ABNORMAL END: S/R INI_THREADING_ENVIRONMENT' |
118 |
ENDIF |
119 |
IF ( .NOT. eeBootError ) THEN |
120 |
byLo = 1 |
121 |
DO J=1,nTy |
122 |
byHi = byLo+byPerThread-1 |
123 |
bxLo = 1 |
124 |
DO I=1,nTx |
125 |
Thid = (J-1)*nTx+I |
126 |
bxHi = bxLo+bxPerThread-1 |
127 |
myBxLo(Thid) = bxLo |
128 |
myBxHi(Thid) = bxHi |
129 |
myByLo(Thid) = byLo |
130 |
myByHi(Thid) = byHi |
131 |
bxLo = bxHi+1 |
132 |
ENDDO |
133 |
byLo = byHi+1 |
134 |
ENDDO |
135 |
ENDIF |
136 |
|
137 |
DO nT=1,nThreads |
138 |
CALL INI_COMMUNICATION_PATTERNS( nT ) |
139 |
ENDDO |
140 |
|
141 |
C-- Print mapping of threads to grid points. |
142 |
WRITE(msgBuf,'(A)') |
143 |
&'// ======================================================' |
144 |
CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
145 |
& SQUEEZE_RIGHT , 1) |
146 |
WRITE(msgBuf,'(A)') '// Mapping of tiles to threads' |
147 |
CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
148 |
& SQUEEZE_RIGHT , 1) |
149 |
C o Write list of tiles each thread is responsible for |
150 |
WRITE(msgBuf,'(A)') |
151 |
&'// ======================================================' |
152 |
CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
153 |
& SQUEEZE_RIGHT , 1) |
154 |
DO I=1,nThreads |
155 |
WRITE(msgBuf,'(A,I4,A,4(I4,A1))') |
156 |
& '// -o- Thread',I,', tiles (', |
157 |
& myBxLo(I),':',myBxHi(I),',',myByLo(I),':',myByHi(I),')' |
158 |
CALL PRINT_MESSAGE( msgBuf, standardMessageUnit,SQUEEZE_BOTH , 1) |
159 |
ENDDO |
160 |
WRITE(msgBuf,'(A)') ' ' |
161 |
CALL PRINT_MESSAGE( msgBuf, standardMessageUnit,SQUEEZE_RIGHT , 1) |
162 |
|
163 |
C o For each tile print its communication method(s) |
164 |
WRITE(msgBuf,'(A)') |
165 |
&'// ======================================================' |
166 |
CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
167 |
& SQUEEZE_RIGHT , 1) |
168 |
WRITE(msgBuf,'(A)') '// Tile <-> Tile connectvity table' |
169 |
CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
170 |
& SQUEEZE_RIGHT , 1) |
171 |
WRITE(msgBuf,'(A)') |
172 |
&'// ======================================================' |
173 |
CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
174 |
& SQUEEZE_RIGHT , 1) |
175 |
DO J=1,nSy |
176 |
DO I=1,nSx |
177 |
WRITE(msgBuf,'(A,A,I6.6,A,I6.6,A)') |
178 |
& '//',' Tile number: ',tileNo(I,J), |
179 |
& ' (process no. = ',myPid,')' |
180 |
CALL PRINT_MESSAGE(msgBuf,standardMessageUnit,SQUEEZE_RIGHT , 1) |
181 |
C o West communication details |
182 |
IF ( tileNoW(I,J).NE. NULL_TILE ) THEN |
183 |
WRITE(msgBuf,'(A,A,I6.6,A,I6.6,A,A)') |
184 |
& '// WEST: ', |
185 |
& 'Tile = ',tileNoW(I,J), |
186 |
& ', Process = ',tilePidW(I,J), |
187 |
& ', Comm = ',commName(tileCommModeW(I,J)) |
188 |
CALL PRINT_MESSAGE(msgBuf,standardMessageUnit,SQUEEZE_RIGHT, 1) |
189 |
WRITE(msgBuf,'(A,A,I6.6,A,I6.6)') |
190 |
& '// ', |
191 |
& ' bi = ',tileBiW(I,J), |
192 |
& ', bj = ',tileBjW(I,J) |
193 |
CALL PRINT_MESSAGE(msgBuf,standardMessageUnit,SQUEEZE_RIGHT, 1) |
194 |
ELSE |
195 |
WRITE(msgBuf,'(A)') |
196 |
& '// WEST: no neighbor' |
197 |
CALL PRINT_MESSAGE(msgBuf,standardMessageUnit,SQUEEZE_RIGHT, 1) |
198 |
ENDIF |
199 |
C o East communication details |
200 |
IF ( tileNoE(I,J).NE. NULL_TILE ) THEN |
201 |
WRITE(msgBuf,'(A,A,I6.6,A,I6.6,A,A)') |
202 |
& '// EAST: ', |
203 |
& 'Tile = ',tileNoE(I,J), |
204 |
& ', Process = ',tilePidE(I,J), |
205 |
& ', Comm = ',commName(tileCommModeE(I,J)) |
206 |
CALL PRINT_MESSAGE(msgBuf,standardMessageUnit,SQUEEZE_RIGHT, 1) |
207 |
WRITE(msgBuf,'(A,A,I6.6,A,I6.6)') |
208 |
& '// ', |
209 |
& ' bi = ',tileBiE(I,J), |
210 |
& ', bj = ',tileBjE(I,J) |
211 |
CALL PRINT_MESSAGE(msgBuf,standardMessageUnit,SQUEEZE_RIGHT, 1) |
212 |
ELSE |
213 |
WRITE(msgBuf,'(A)') |
214 |
& '// EAST: no neighbor' |
215 |
CALL PRINT_MESSAGE(msgBuf,standardMessageUnit,SQUEEZE_RIGHT, 1) |
216 |
ENDIF |
217 |
C o South communication method |
218 |
IF ( tileNoS(I,J).NE. NULL_TILE ) THEN |
219 |
WRITE(msgBuf,'(A,A,I6.6,A,I6.6,A,A)') |
220 |
& '// SOUTH: ', |
221 |
& 'Tile = ',tileNoS(I,J), |
222 |
& ', Process = ',tilePidS(I,J), |
223 |
& ', Comm = ',commName(tileCommModeS(I,J)) |
224 |
CALL PRINT_MESSAGE(msgBuf,standardMessageUnit,SQUEEZE_RIGHT, 1) |
225 |
WRITE(msgBuf,'(A,A,I6.6,A,I6.6)') |
226 |
& '// ', |
227 |
& ' bi = ',tileBiS(I,J), |
228 |
& ', bj = ',tileBjS(I,J) |
229 |
CALL PRINT_MESSAGE(msgBuf,standardMessageUnit,SQUEEZE_RIGHT, 1) |
230 |
ELSE |
231 |
WRITE(msgBuf,'(A)') |
232 |
& '// SOUTH: no neighbor' |
233 |
CALL PRINT_MESSAGE(msgBuf,standardMessageUnit,SQUEEZE_RIGHT, 1) |
234 |
ENDIF |
235 |
C o North communication method |
236 |
IF ( tileNoN(I,J).NE. NULL_TILE ) THEN |
237 |
WRITE(msgBuf,'(A,A,I6.6,A,I6.6,A,A)') |
238 |
& '// NORTH: ', |
239 |
& 'Tile = ',tileNoN(I,J), |
240 |
& ', Process = ',tilePidN(I,J), |
241 |
& ', Comm = ',commName(tileCommModeN(I,J)) |
242 |
CALL PRINT_MESSAGE(msgBuf,standardMessageUnit,SQUEEZE_RIGHT, 1) |
243 |
WRITE(msgBuf,'(A,A,I6.6,A,I6.6)') |
244 |
& '// ', |
245 |
& ' bi = ',tileBiN(I,J), |
246 |
& ', bj = ',tileBjN(I,J) |
247 |
CALL PRINT_MESSAGE(msgBuf,standardMessageUnit,SQUEEZE_RIGHT, 1) |
248 |
ELSE |
249 |
WRITE(msgBuf,'(A)') |
250 |
& '// NORTH: no neighbor' |
251 |
CALL PRINT_MESSAGE(msgBuf,standardMessageUnit,SQUEEZE_RIGHT, 1) |
252 |
ENDIF |
253 |
ENDDO |
254 |
ENDDO |
255 |
WRITE(msgBuf,'(A)') ' ' |
256 |
CALL PRINT_MESSAGE( msgBuf,standardMessageUnit,SQUEEZE_RIGHT, 1) |
257 |
|
258 |
RETURN |
259 |
END |