[4775] | 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.seqUnvn.F90,v 1.6 2007-12-19 17:13:17 rloy 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: twocomponentUneven.sequential |
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| 9 | ! |
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| 10 | ! !DESCRIPTION: Provide a simple example of using MCT to connect two components |
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| 11 | ! In this case the models are running sequentialy but the second model |
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| 12 | ! is only running on 1 processor. |
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| 13 | ! |
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| 14 | ! !INTERFACE: |
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| 15 | ! |
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| 16 | program twosequn |
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| 17 | ! |
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| 18 | ! !USES: |
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| 19 | ! |
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| 20 | !--- Get 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_Rearranger,only: Rearranger |
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| 35 | use m_Rearranger,only: MCT_Rearranger_init => init |
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| 36 | use m_Rearranger,only: MCT_Rearrange => Rearrange |
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| 37 | |
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| 38 | implicit none |
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| 39 | |
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| 40 | include 'mpif.h' |
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| 41 | |
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| 42 | integer,parameter :: ngx = 6 ! points in x-direction |
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| 43 | integer,parameter :: ngy = 4 ! points in y-direction |
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| 44 | |
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| 45 | integer ier,world_group,model2_group,myrank2,myrank3 |
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| 46 | integer,dimension(:),pointer :: myids,mycomms,peloc2 |
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| 47 | integer,dimension(:,:),pointer :: GlobalId |
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| 48 | integer :: comm1,comm2,asize,mysize,i,myproc |
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| 49 | integer :: commsize |
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| 50 | integer,dimension(1) :: start1,length1,ranks |
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| 51 | integer,dimension(:),allocatable :: start2,length2 |
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| 52 | !----------------------------------------------------------------------- |
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| 53 | ! The Main program. |
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| 54 | ! We are implementing a single-executable, sequential-execution system. |
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| 55 | ! Because its sequential, communication occurs through the main using |
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| 56 | ! arguments. The second component is only running on 1 processor |
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| 57 | |
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| 58 | type(GlobalSegMap) :: GSmap1,GSmap2 |
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| 59 | type(AttrVect) :: av1,av2 |
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| 60 | type(Rearranger) :: Rearr |
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| 61 | |
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| 62 | call MPI_init(ier) |
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| 63 | |
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| 64 | call mpi_comm_size(MPI_COMM_WORLD, mysize,ier) |
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| 65 | if(mysize .gt. 12) then |
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| 66 | write(6,*)"Must run on less than 12 processors" |
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| 67 | stop |
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| 68 | endif |
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| 69 | call mpi_comm_rank(MPI_COMM_WORLD, myproc,ier) |
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| 70 | |
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| 71 | ! the first model is running on all the processors so give |
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| 72 | ! it a dubplicate of MPI_COMM_WORLD for its communicator |
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| 73 | call mpi_comm_dup(MPI_COMM_WORLD,comm1,ier) |
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| 74 | |
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| 75 | ! the second model is only running on one processor |
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| 76 | ! so use mpi_groups methods to define its communicator |
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| 77 | call mpi_comm_group(MPI_COMM_WORLD,world_group,ier) |
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| 78 | |
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| 79 | ! need a communicator that only has the first processor |
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| 80 | ranks(1)=0 |
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| 81 | ! define the group |
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| 82 | call mpi_group_incl(world_group,1,ranks,model2_group,ier) |
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| 83 | ! now define the communicator |
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| 84 | ! first initialize it |
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| 85 | comm2=MPI_COMM_NULL |
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| 86 | call mpi_comm_create(MPI_COMM_WORLD,model2_group,comm2,ier) |
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| 87 | |
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| 88 | ! don't need the groups anymore |
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| 89 | call mpi_group_free(world_group,ier) |
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| 90 | call mpi_group_free(model2_group,ier) |
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| 91 | |
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| 92 | ! allocate arrays for the ids and comms |
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| 93 | allocate(myids(2),mycomms(2)) |
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| 94 | |
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| 95 | ! Set the arrays to their values. |
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| 96 | myids(1)=1 |
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| 97 | myids(2)=2 |
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| 98 | mycomms(1)=comm1 |
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| 99 | mycomms(2)=comm2 |
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| 100 | |
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| 101 | ! now call the initm_ version of MCTWorld_init |
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| 102 | call MCTWorld_init(2,MPI_COMM_WORLD,mycomms,myids) |
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| 103 | |
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| 104 | |
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| 105 | ! first gsmap is the grid decomposed in one dimension |
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| 106 | ! there is 1 segment per processor |
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| 107 | length1(1)= (ngx * ngy)/mysize |
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| 108 | start1(1)= myproc * length1(1) + 1 |
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| 109 | |
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| 110 | write(6,*)'gsmap1', myproc,length1(1),start1(1) |
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| 111 | call MCT_GSMap_init(GSMap1,start1,length1,0,comm1,1) |
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| 112 | |
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| 113 | ! second gsmap is the grid on one processor |
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| 114 | |
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| 115 | ! for GSMap init to work, the size of the start and length arrays |
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| 116 | ! must equal the number of local segments. So I must allocate |
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| 117 | ! size zero arrays on the other processors. |
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| 118 | if(myproc .eq. 0) then |
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| 119 | allocate(start2(1),length2(1)) |
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| 120 | length2(1) = ngx*ngy |
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| 121 | start2(1) = 1 |
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| 122 | else |
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| 123 | allocate(start2(0),length2(0)) |
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| 124 | endif |
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| 125 | |
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| 126 | call MCT_GSMap_init(GSMap2,start2,length2,0,comm1,2) |
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| 127 | write(6,*)'gsmap2', myproc,GSMap2%ngseg,GSmap2%gsize,GSmap2%start(1), & |
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| 128 | GSmap2%pe_loc(1),GSmap2%length(1) |
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| 129 | |
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| 130 | |
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| 131 | ! initialize an Av on each GSMap |
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| 132 | call MCT_AtrVt_init(av1,rList="field1:field2",lsize=MCT_GSMap_lsize(GSMap1,comm1)) |
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| 133 | |
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| 134 | ! Use comm1 because lsize of GSMap2 on comm1 will return 0 on non-root processors. |
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| 135 | ! We need av2 to be full-sized on proc 0 and 0 size on other processors. |
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| 136 | call MCT_AtrVt_init(av2,rList="field1:field2",lsize=MCT_GSMap_lsize(GSMap2,comm1)) |
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| 137 | |
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| 138 | |
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| 139 | ! create a rearranger. Use the communicator which contains all processors |
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| 140 | ! involved in the rearrangement, comm1 |
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| 141 | call MCT_Rearranger_init(GSMap1,GSMap2,comm1,Rearr) |
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| 142 | |
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| 143 | !-------------end of initialization steps |
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| 144 | |
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| 145 | |
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| 146 | ! Start up model1 which fills av1 with data. |
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| 147 | call model1(comm1,av1) |
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| 148 | |
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| 149 | ! print out Av data |
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| 150 | do i=1,MCT_AtrVt_lsize(av1) |
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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 | ! rearrange data from model1 so that model2 can use it. |
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| 155 | call MCT_Rearrange(av1,av2,Rearr) |
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| 156 | |
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| 157 | ! pass data to model2 (which will print it out) |
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| 158 | ! model2 should only run on one processor. |
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| 159 | if(myproc .eq. 0) then |
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| 160 | call model2(comm2,av2) |
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| 161 | endif |
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| 162 | |
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| 163 | |
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| 164 | ! all done |
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| 165 | call MPI_Barrier(MPI_COMM_WORLD,ier) |
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| 166 | if (myproc==0) write(6,*) 'All Done' |
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| 167 | |
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| 168 | call mpi_finalize(ier) |
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| 169 | |
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| 170 | contains |
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| 171 | |
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| 172 | !----------------------------------------------------------------------- |
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| 173 | !----------------------------------------------------------------------- |
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| 174 | ! !ROUTINE: |
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| 175 | subroutine model1(comm1,mod1av) ! the first model |
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| 176 | |
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| 177 | implicit none |
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| 178 | |
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| 179 | integer :: comm1,mysize,ier,asize,myproc |
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| 180 | integer :: fieldindx,avsize,i |
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| 181 | integer,dimension(1) :: start,length |
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| 182 | real,pointer :: testarray(:) |
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| 183 | |
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| 184 | type(GlobalSegMap) :: GSmap |
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| 185 | type(AttrVect) :: mod1av |
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| 186 | !--------------------------- |
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| 187 | |
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| 188 | ! find local rank and size |
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| 189 | call mpi_comm_size(comm1,mysize,ier) |
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| 190 | call mpi_comm_rank(comm1,myproc,ier) |
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| 191 | write(6,*)"model1 myproc,mysize",myproc,mysize |
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| 192 | |
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| 193 | |
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| 194 | avsize = MCT_AtrVt_lsize(mod1av) |
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| 195 | write(6,*)"model 1 myproc, av size", myproc,avsize |
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| 196 | |
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| 197 | ! Fill Av with some data |
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| 198 | ! fill first attribute the direct way |
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| 199 | fieldindx = MCT_AtrVt_indexRA(mod1av,"field1") |
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| 200 | do i=1,avsize |
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| 201 | mod1av%rAttr(fieldindx,i) = float(i+ 20*myproc) |
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| 202 | enddo |
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| 203 | |
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| 204 | ! fill second attribute using Av import function |
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| 205 | allocate(testarray(avsize)) |
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| 206 | do i=1,avsize |
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| 207 | testarray(i)= cos((float(i+ 20*myproc)/24.) * 3.14) |
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| 208 | enddo |
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| 209 | call MCT_AtrVt_importRA(mod1av,"field2",testarray) |
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| 210 | |
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| 211 | |
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| 212 | end subroutine model1 |
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| 213 | |
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| 214 | !----------------------------------------------------------------------- |
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| 215 | !----------------------------------------------------------------------- |
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| 216 | ! !ROUTINE: |
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| 217 | subroutine model2(comm2,mod2av) |
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| 218 | |
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| 219 | implicit none |
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| 220 | |
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| 221 | integer :: comm2,mysize,ier,asize,myproc |
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| 222 | integer :: i |
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| 223 | type(AttrVect) :: mod2av |
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| 224 | !--------------------------- |
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| 225 | |
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| 226 | ! find local rank and size |
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| 227 | call mpi_comm_size(comm2,mysize,ier) |
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| 228 | call mpi_comm_rank(comm2,myproc,ier) |
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| 229 | write(6,*)"model2 myproc,mysize",myproc,mysize |
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| 230 | |
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| 231 | asize = MCT_AtrVt_lsize(mod2av) |
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| 232 | write(6,*)"model 2 myproc, av size", myproc,asize |
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| 233 | |
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| 234 | ! print out Av data |
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| 235 | do i=1,asize |
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| 236 | write(6,*) "model 2 data after", myproc,i,mod2av%rAttr(1,i),mod2av%rAttr(2,i) |
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| 237 | enddo |
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| 238 | |
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| 239 | |
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| 240 | end subroutine model2 |
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| 241 | |
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| 242 | end |
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