1 | !~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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2 | ! Math and Computer Science Division, Argonne National Laboratory ! |
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3 | !----------------------------------------------------------------------- |
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4 | ! CVS twocmp.con.F90,v 1.4 2006-07-25 22:31:34 jacob Exp |
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5 | ! CVS MCT_2_8_0 |
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6 | !BOP ------------------------------------------------------------------- |
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7 | ! |
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8 | ! !ROUTINE: twocomponent.concurrent |
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9 | ! |
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10 | ! !DESCRIPTION: Provide a simple example of using MCT to connect two |
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11 | ! components executing concurrently in a single executable. |
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12 | ! |
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13 | ! |
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14 | ! !INTERFACE: |
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15 | ! |
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16 | program twocon |
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17 | ! |
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18 | ! !USES: |
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19 | ! |
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20 | !--- Use only the things needed from MCT |
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21 | use m_MCTWorld,only: MCTWorld_init => init |
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22 | |
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23 | use m_GlobalSegMap,only: GlobalSegMap |
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24 | use m_GlobalSegMap,only: MCT_GSMap_init => init |
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25 | use m_GlobalSegMap,only: MCT_GSMap_lsize => lsize |
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26 | |
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27 | use m_AttrVect,only : AttrVect |
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28 | use m_AttrVect,only : MCT_AtrVt_init => init |
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29 | use m_AttrVect,only : MCT_AtrVt_zero => zero |
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30 | use m_AttrVect,only : MCT_AtrVt_lsize => lsize |
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31 | use m_AttrVect,only : MCT_AtrVt_indexRA => indexRA |
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32 | use m_AttrVect,only : MCT_AtrVt_importRA => importRAttr |
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33 | |
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34 | use m_Router,only: Router |
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35 | use m_Router,only: MCT_Router_init => init |
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36 | |
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37 | use m_Transfer,only : MCT_Send => send |
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38 | use m_Transfer,only : MCT_Recv => recv |
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39 | |
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40 | implicit none |
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41 | |
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42 | include 'mpif.h' |
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43 | !----------------------------------------------------------------------- |
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44 | ! Local variables |
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45 | |
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46 | integer,parameter :: npoints = 24 ! number of grid points |
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47 | |
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48 | integer ier,nprocs |
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49 | integer color,myrank,mycomm |
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50 | !----------------------------------------------------------------------- |
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51 | ! The Main program. |
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52 | ! We are implementing a single-executable, concurrent-execution system. |
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53 | ! This small main program carves up MPI_COMM_WORLD and then starts |
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54 | ! each component on its own processor set. |
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55 | |
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56 | call MPI_init(ier) |
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57 | |
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58 | call mpi_comm_size(MPI_COMM_WORLD, nprocs,ier) |
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59 | call mpi_comm_rank(MPI_COMM_WORLD, myrank,ier) |
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60 | |
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61 | if((nprocs .gt. 14).or.(nprocs .lt. 3)) then |
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62 | write(6,*)"The small problem size in this example & |
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63 | &requires between 3 and 14 processors." |
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64 | write(6,*)"nprocs =",nprocs |
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65 | stop |
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66 | endif |
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67 | |
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68 | |
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69 | ! Force the model1 to run on the first 2 processors |
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70 | color =1 |
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71 | if (myrank .lt. 2) then |
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72 | color = 0 |
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73 | endif |
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74 | |
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75 | ! Split MPI_COMM_WORLD into a communicator for each model |
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76 | call mpi_comm_split(MPI_COMM_WORLD,color,0,mycomm,ier) |
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77 | |
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78 | ! Start up the the models, pass in the communicators |
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79 | if(color .eq. 0) then |
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80 | call model1(mycomm) |
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81 | else |
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82 | call model2(mycomm) |
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83 | endif |
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84 | |
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85 | ! Models are finished. |
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86 | call mpi_finalize(ier) |
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87 | |
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88 | contains |
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89 | |
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90 | !----------------------------------------------------------------------- |
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91 | !----------------------------------------------------------------------- |
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92 | ! !ROUTINE: |
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93 | subroutine model1(comm1) ! the first model |
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94 | |
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95 | implicit none |
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96 | |
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97 | integer :: comm1,mysize,ier,asize,myproc |
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98 | integer :: fieldindx,avsize,i |
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99 | integer,dimension(1) :: start,length |
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100 | real,pointer :: testarray(:) |
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101 | |
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102 | type(GlobalSegMap) :: GSmap |
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103 | type(AttrVect) :: av1 |
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104 | type(Router) :: Rout |
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105 | !--------------------------- |
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106 | |
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107 | ! find local rank and size |
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108 | call mpi_comm_size(comm1,mysize,ier) |
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109 | call mpi_comm_rank(comm1,myproc,ier) |
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110 | write(6,*)"model1 size",mysize |
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111 | |
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112 | ! initialize ThisMCTWorld |
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113 | call MCTWorld_init(2,MPI_COMM_WORLD,comm1,1) |
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114 | |
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115 | ! set up a grid and decomposition |
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116 | asize = npoints/mysize |
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117 | |
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118 | start(1)= (myproc*asize) +1 |
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119 | length(1)=asize |
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120 | |
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121 | ! describe decomposition with MCT GSmap type |
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122 | call MCT_GSMap_init(GSMap,start,length,0,comm1,1) |
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123 | |
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124 | write(6,*)"model 1 GSMap ngseg",myproc,GSMap%ngseg,start(1) |
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125 | |
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126 | ! Initialize an Attribute Vector |
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127 | call MCT_AtrVt_init(av1,rList="field1:field2",lsize=MCT_GSMap_lsize(GSMap,comm1)) |
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128 | |
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129 | avsize = MCT_AtrVt_lsize(av1) |
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130 | write(6,*)"model 1 av size", avsize |
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131 | |
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132 | ! Fill Av with some data |
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133 | ! fill first attribute the direct way |
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134 | fieldindx = MCT_AtrVt_indexRA(av1,"field1") |
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135 | do i=1,avsize |
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136 | av1%rAttr(fieldindx,i) = float(i) |
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137 | enddo |
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138 | |
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139 | ! fill second attribute using Av import function |
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140 | allocate(testarray(avsize)) |
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141 | do i=1,avsize |
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142 | testarray(i)= cos((float(i)/npoints) * 3.14) |
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143 | enddo |
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144 | call MCT_AtrVt_importRA(av1,"field2",testarray) |
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145 | |
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146 | ! initialize a Router |
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147 | call MCT_Router_init(2,GSMap,comm1,Rout) |
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148 | |
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149 | ! print out Av data |
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150 | do i=1,asize |
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151 | write(6,*) "model 1 data", myproc,i,av1%rAttr(1,i),av1%rAttr(2,i) |
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152 | enddo |
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153 | |
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154 | ! send the data |
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155 | call MCT_Send(av1,Rout) |
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156 | |
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157 | |
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158 | |
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159 | end subroutine model1 |
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160 | |
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161 | !----------------------------------------------------------------------- |
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162 | !----------------------------------------------------------------------- |
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163 | ! !ROUTINE: |
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164 | subroutine model2(comm2) |
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165 | |
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166 | implicit none |
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167 | |
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168 | integer :: comm2,mysize,ier,asize,myproc |
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169 | integer :: i |
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170 | integer,dimension(1) :: start,length |
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171 | type(GlobalSegMap) :: GSmap |
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172 | type(AttrVect) :: av1 |
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173 | type(Router) :: Rout |
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174 | !--------------------------- |
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175 | |
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176 | ! find local rank and size |
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177 | call mpi_comm_size(comm2,mysize,ier) |
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178 | call mpi_comm_rank(comm2,myproc,ier) |
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179 | write(6,*)"model2 size",mysize |
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180 | |
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181 | ! initialize ThisMCTWorld |
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182 | call MCTWorld_init(2,MPI_COMM_WORLD,comm2,2) |
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183 | |
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184 | ! set up a grid and decomposition |
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185 | asize = npoints/mysize |
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186 | |
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187 | start(1)= (myproc*asize) +1 |
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188 | length(1)=asize |
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189 | |
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190 | ! describe decomposition with MCT GSmap type |
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191 | call MCT_GSMap_init(GSMap,start,length,0,comm2,2) |
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192 | |
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193 | write(6,*)"model 2 GSMap ngseg",myproc,GSMap%ngseg,start(1) |
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194 | |
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195 | ! Initialize an Attribute Vector |
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196 | call MCT_AtrVt_init(av1,rList="field1:field2",lsize=MCT_GSMap_lsize(GSMap,comm2)) |
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197 | |
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198 | write(6,*)"model 2 av size", MCT_AtrVt_lsize(av1) |
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199 | |
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200 | ! initialize Av to be zero everywhere |
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201 | call MCT_AtrVt_zero(av1) |
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202 | |
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203 | ! initialize a Router |
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204 | call MCT_Router_init(1,GSMap,comm2,Rout) |
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205 | |
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206 | ! print out Av data before Recv |
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207 | do i=1,asize |
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208 | write(6,*) "model 2 data", myproc,i,av1%rAttr(1,i),av1%rAttr(2,i) |
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209 | enddo |
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210 | |
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211 | ! Recv the data |
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212 | call MCT_Recv(av1,Rout) |
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213 | |
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214 | ! print out Av data after Recv. |
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215 | do i=1,asize |
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216 | write(6,*) "model 2 data after", myproc,i,av1%rAttr(1,i),av1%rAttr(2,i) |
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217 | enddo |
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218 | |
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219 | |
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220 | end subroutine model2 |
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221 | |
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222 | end |
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