| 1 | MODULE mod_ioclient_para |
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| 2 | INTEGER,PARAMETER :: color_client=1 |
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| 3 | INTEGER,PARAMETER :: color_server=2 |
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| 4 | INTEGER,SAVE :: iocomm |
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| 5 | INTEGER,SAVE :: iosize |
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| 6 | INTEGER,SAVE :: iorank |
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| 7 | INTEGER,SAVE :: server_rank |
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| 8 | INTEGER,SAVE :: intracomm |
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| 9 | CONTAINS |
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| 10 | |
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| 11 | |
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| 12 | SUBROUTINE Init_parallel |
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| 13 | USE mpitrace |
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| 14 | IMPLICIT NONE |
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| 15 | INCLUDE 'mpif.h' |
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| 16 | INTEGER :: NEW_COMM |
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| 17 | INTEGER :: ierr |
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| 18 | INTEGER :: global_rank |
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| 19 | INTEGER :: global_size |
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| 20 | INTEGER :: mpi_rank |
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| 21 | INTEGER :: mpi_size |
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| 22 | INTEGER :: nb_server_io |
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| 23 | INTEGER,ALLOCATABLE :: proc_color(:) |
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| 24 | INTEGER :: i |
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| 25 | INTEGER :: div,remain |
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| 26 | INTEGER :: group_color |
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| 27 | |
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| 28 | ! PRINT *, "on rentre dans MPI_INIT" |
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| 29 | CALL MPI_INIT(ierr) |
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| 30 | CALL MPI_COMM_RANK(MPI_COMM_WORLD,global_rank,ierr) |
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| 31 | CALL MPI_COMM_SIZE(MPI_COMM_WORLD,global_size,ierr) |
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| 32 | |
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| 33 | PRINT *,"MPI_init Ok, --> mpi_comm_split" |
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| 34 | CALL MPI_COMM_SPLIT(MPI_COMM_WORLD,color_client,global_rank,intracomm,ierr) |
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| 35 | CALL MPI_COMM_SIZE(intracomm,mpi_size,ierr) |
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| 36 | CALL MPI_COMM_RANK(intracomm,mpi_rank,ierr) |
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| 37 | PRINT *,"MPI_mpi_comm_split ok --> intracomm" |
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| 38 | nb_server_io=global_size-mpi_size |
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| 39 | div=mpi_size/nb_server_io |
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| 40 | remain=MOD(mpi_size,nb_server_io) |
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| 41 | |
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| 42 | IF (mpi_rank<remain*(div+1)) THEN |
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| 43 | group_color=mpi_rank/(div+1) |
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| 44 | ELSE |
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| 45 | group_color=(nb_server_io-1)-(mpi_size-1-mpi_rank)/div |
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| 46 | ENDIF |
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| 47 | PRINT *,'group_color',group_color |
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| 48 | |
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| 49 | CALL MPI_COMM_SPLIT(MPI_COMM_WORLD,group_color,global_rank,iocomm,ierr) |
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| 50 | |
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| 51 | CALL MPI_COMM_SIZE(iocomm,iosize,ierr) |
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| 52 | CALL MPI_COMM_RANK(iocomm,iorank,ierr) |
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| 53 | PRINT *,"io_size-> ",iosize,"iorank-> ",iorank |
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| 54 | ALLOCATE(proc_color(0:iosize-1)) |
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| 55 | CALL MPI_ALLGATHER(color_client,1,MPI_INTEGER,proc_color,1,MPI_INTEGER,iocomm,ierr) |
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| 56 | print *,"proc_color -> ",proc_color |
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| 57 | |
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| 58 | DO i=0,iosize-1 |
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| 59 | IF (proc_color(i)==color_server) THEN |
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| 60 | server_rank=i |
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| 61 | EXIT |
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| 62 | ENDIF |
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| 63 | ENDDO |
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| 64 | |
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| 65 | PRINT *,"Proces No",mpi_rank,"--> server",server_rank |
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| 66 | END SUBROUTINE Init_parallel |
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| 67 | |
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| 68 | SUBROUTINE Finalize_parallel |
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| 69 | IMPLICIT NONE |
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| 70 | include 'mpif.h' |
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| 71 | INTEGER :: ierr |
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| 72 | |
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| 73 | CALL MPI_FINALIZE(ierr) |
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| 74 | |
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| 75 | END SUBROUTINE Finalize_parallel |
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| 76 | |
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| 77 | END MODULE mod_ioclient_para |
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