Improved mask sampler

CHANGELOG.md

@@ -11,6 +11,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+- Improve mask sampler by adding an MPI step and a LS_chunk (intermediate step)
+
 ### Fixed
 
 ### Removed

gridcomps/History/MAPL_HistoryGridComp.F90

@@ -2426,8 +2426,10 @@ subroutine Initialize ( gc, import, dumexport, clock, rc )
              call list(n)%trajectory%initialize(items=list(n)%items,bundle=list(n)%bundle,timeinfo=list(n)%timeInfo,vdata=list(n)%vdata,_RC)
              IntState%stampoffset(n) = list(n)%trajectory%epoch_frequency
           elseif (list(n)%sampler_spec == 'mask') then
+             call MAPL_TimerOn(GENSTATE,"mask_init")
              list(n)%mask_sampler = MaskSamplerGeosat(cfg,string,clock,genstate=GENSTATE,_RC)
              call list(n)%mask_sampler%initialize(items=list(n)%items,bundle=list(n)%bundle,timeinfo=list(n)%timeInfo,vdata=list(n)%vdata,_RC)
+             call MAPL_TimerOff(GENSTATE,"mask_init")
           elseif (list(n)%sampler_spec == 'station') then
              list(n)%station_sampler = StationSampler (list(n)%bundle, trim(list(n)%stationIdFile), nskip_line=list(n)%stationSkipLine, genstate=GENSTATE, _RC)
              call list(n)%station_sampler%add_metadata_route_handle(items=list(n)%items,bundle=list(n)%bundle,timeinfo=list(n)%timeInfo,vdata=list(n)%vdata,_RC)
@@ -3706,11 +3708,9 @@ subroutine Run ( gc, import, export, clock, rc )
             call MAPL_TimerOff(GENSTATE,"Station")
          elseif (list(n)%sampler_spec == 'mask') then
             call ESMF_ClockGet(clock,currTime=current_time,_RC)
-            call MAPL_TimerOn(GENSTATE,"Mask")
-            call MAPL_TimerOn(GENSTATE,"AppendFile")
+            call MAPL_TimerOn(GENSTATE,"Mask_append")
             call list(n)%mask_sampler%append_file(current_time,_RC)
-            call MAPL_TimerOff(GENSTATE,"AppendFile")
-            call MAPL_TimerOff(GENSTATE,"Mask")
+            call MAPL_TimerOff(GENSTATE,"Mask_append")
          endif
 
 

gridcomps/History/Sampler/MAPL_GeosatMaskMod.F90

@@ -21,6 +21,7 @@ module MaskSamplerGeosatMod
   use pFIO_FileMetadataMod, only : FileMetadata
   use pFIO_NetCDF4_FileFormatterMod, only : NetCDF4_FileFormatter
   use MAPL_GenericMod, only : MAPL_MetaComp, MAPL_TimerOn, MAPL_TimerOff
+  use MPI, only  :  MPI_INTEGER, MPI_REAL, MPI_REAL8
   use, intrinsic :: iso_fortran_env, only: REAL32
   use, intrinsic :: iso_fortran_env, only: REAL64
   use pflogger, only: Logger, logging

gridcomps/History/Sampler/MAPL_GeosatMaskMod_smod.F90

@@ -35,7 +35,7 @@ module function MaskSamplerGeosat_from_config(config,string,clock,GENSTATE,rc) r
   mask%clock=clock
   mask%grid_file_name=''
   if (present(GENSTATE)) mask%GENSTATE => GENSTATE
-  
+
   call ESMF_ClockGet ( clock, CurrTime=currTime, _RC )
   if (mapl_am_I_root()) write(6,*) 'string', string
 
@@ -159,13 +159,13 @@ module subroutine create_Geosat_grid_find_mask(this, rc)
        integer, optional, intent(out)          :: rc
 
        type(Logger), pointer :: lgr
-       real(ESMF_KIND_R8), pointer :: ptAT(:)
        type(ESMF_routehandle) :: RH
        type(ESMF_Grid) :: grid
-       integer :: mypet, npes
+       integer :: mypet, petcount, mpic
        integer :: iroot, rootpet, ierr
        type (ESMF_LocStream) :: LS_rt
        type (ESMF_LocStream) :: LS_ds
+       type (ESMF_LocStream) :: LS_chunk
        type (LocStreamFactory):: locstream_factory
        type (ESMF_Field) :: fieldA
        type (ESMF_Field) :: fieldB
@@ -182,13 +182,11 @@ module subroutine create_Geosat_grid_find_mask(this, rc)
        type(ESMF_DElayout) :: layout
        type(ESMF_VM) :: VM
        integer :: myid
-       integer :: ndes
        integer :: dimCount
        integer, allocatable :: II(:)
        integer, allocatable :: JJ(:)
        real(REAL64), allocatable :: obs_lons(:)
        real(REAL64), allocatable :: obs_lats(:)
-       integer :: mpic
 
        type (ESMF_Field) :: fieldI4
        type(ESMF_routehandle) :: RH_halo
@@ -227,17 +225,34 @@ module subroutine create_Geosat_grid_find_mask(this, rc)
        integer :: nsend
        integer, allocatable :: recvcounts_loc(:)
        integer, allocatable :: displs_loc(:)
-       integer :: status
+
+       integer, allocatable :: sendcount(:), displs(:)
+       integer :: recvcount
+       integer :: M, N, ip
+       integer :: nx2
+
+       real(REAL64), allocatable :: lons_chunk(:)
+       real(REAL64), allocatable :: lats_chunk(:)
+
+       integer :: status, imethod
+
 
        lgr => logging%get_logger('HISTORY.sampler')
 
        ! Metacode:
-       !   read ABI grid into LS_rt
-       !   gen LS_ds with CS background grid
+       !   read ABI grid into  lons/lats, lons_chunk/lats_chunk
+       !   gen LS_chunk and LS_ds with CS background grid
        !   find mask points on each PET with halo
        !   prepare recvcounts + displs for gatherv
        !
 
+       call ESMF_VMGetCurrent(vm,_RC)
+       call ESMF_VMGet(vm, mpiCommunicator=mpic, petcount=petcount, localpet=mypet, _RC)
+       iroot = 0
+       ip = mypet    ! 0 to M-1
+       M = petCount
+
+       call MAPL_TimerOn(this%GENSTATE,"1_genABIgrid")
        if (mapl_am_i_root()) then
           ! __s1.  SAT file
           !
@@ -247,100 +262,156 @@ module subroutine create_Geosat_grid_find_mask(this, rc)
           key_p = this%var_name_proj
           key_p_att = this%att_name_proj
           call get_ncfile_dimension(fn,nlon=n1,nlat=n2,key_lon=key_x,key_lat=key_y,_RC)
-          !
-          ! use thin_factor to reduce regridding matrix size
-          !
-          xdim_true = n1
-          ydim_true = n2
-          xdim_red  = n1 / this%thin_factor
-          ydim_red  = n2 / this%thin_factor
-          allocate (x (xdim_true), _STAT )
-          allocate (y (xdim_true), _STAT )
-
+          allocate (x(n1), y(n2), _STAT)
           call get_v1d_netcdf_R8_complete (fn, key_x, x, _RC)
           call get_v1d_netcdf_R8_complete (fn, key_y, y, _RC)
           call get_att_real_netcdf (fn, key_p, key_p_att, lambda0_deg, _RC)
           lam_sat = lambda0_deg * MAPL_DEGREES_TO_RADIANS_R8
+       end if
+       call MAPL_CommsBcast(vm, DATA=n1, N=1, ROOT=MAPL_Root, _RC)
+       call MAPL_CommsBcast(vm, DATA=n2, N=1, ROOT=MAPL_Root, _RC)
+       if ( .NOT. mapl_am_i_root() )  allocate (x(n1), y(n2), _STAT)
+       call MAPL_CommsBcast(vm, DATA=lam_sat, N=1, ROOT=MAPL_Root, _RC)
+       call MAPL_CommsBcast(vm, DATA=x, N=n1, ROOT=MAPL_Root, _RC)
+       call MAPL_CommsBcast(vm, DATA=y, N=n2, ROOT=MAPL_Root, _RC)
+
+       !
+       ! use thin_factor to reduce regridding matrix size
+       !
+       xdim_red  = n1 / this%thin_factor
+       ydim_red  = n2 / this%thin_factor
+       _ASSERT ( xdim_red * ydim_red > M, 'mask reduced points after thin_factor is less than Nproc!')
 
-          nx=0
-          do i=1, xdim_red
-             do j=1, ydim_red
+       ! get nx2
+       nx2=0
+       k=0
+       do i=1, xdim_red
+          do j=1, ydim_red
+             k = k + 1
+             if ( mod(k,M) == ip ) then
                 x0 = x( i * this%thin_factor )
                 y0 = y( j * this%thin_factor )
                 call ABI_XY_2_lonlat (x0, y0, lam_sat, lon0, lat0, mask=mask0)
                 if (mask0 > 0) then
-                   nx=nx+1
+                   nx2=nx2+1
                 end if
-             end do
+             end if
           end do
-          allocate (lons(nx), lats(nx), _STAT)
-          nx = 0
-          do i=1, xdim_red
-             do j=1, ydim_red
+       end do
+       allocate (lons_chunk(nx2), lats_chunk(nx2), _STAT)
+
+       ! get lons_chunk/...
+       nx2 = 0
+       k = 0
+       do i=1, xdim_red
+          do j=1, ydim_red
+             k = k + 1
+             if ( mod(k,M) == ip ) then
                 x0 = x( i * this%thin_factor )
                 y0 = y( j * this%thin_factor )
                 call ABI_XY_2_lonlat (x0, y0, lam_sat, lon0, lat0, mask=mask0)
                 if (mask0 > 0) then
-                   nx=nx+1
-                   lons(nx) = lon0 * MAPL_RADIANS_TO_DEGREES
-                   lats(nx) = lat0 * MAPL_RADIANS_TO_DEGREES
+                   nx2=nx2+1
+                   lons_chunk(nx2) = lon0 * MAPL_RADIANS_TO_DEGREES
+                   lats_chunk(nx2) = lat0 * MAPL_RADIANS_TO_DEGREES
                 end if
-             end do
+             end if
           end do
-          arr(1)=nx
-       else
-          allocate(lons(0),lats(0),_STAT)
-          arr(1)=0
-       endif
+       end do
 
-       call ESMF_VMGetCurrent(vm,_RC)
-       call ESMF_VMGet(vm, mpiCommunicator=mpic, petcount=npes, localpet=mypet, _RC)
+       arr(1)=nx2
        call ESMF_VMAllFullReduce(vm, sendData=arr, recvData=nx, &
             count=1, reduceflag=ESMF_REDUCE_SUM, _RC)
-       this%nobs = nx
-       if (mapl_am_I_root()) write(6,*) 'nobs tot :', nx
 
-       if ( nx == 0 ) then
-          this%is_valid = .false.
-          _RETURN(ESMF_SUCCESS)
-          !
-          ! no valid obs points are found
-          !
+
+       ! gatherV for lons/lats
+       if (mapl_am_i_root()) then
+          allocate(lons(nx),lats(nx),_STAT)
+       else
+          allocate(lons(0),lats(0),_STAT)
+       endif
+
+       allocate( this%recvcounts(petcount), this%displs(petcount), _STAT )
+       allocate( recvcounts_loc(petcount), displs_loc(petcount), _STAT )
+       recvcounts_loc(:)=1
+       displs_loc(1)=0
+       do i=2, petcount
+          displs_loc(i) = displs_loc(i-1) + recvcounts_loc(i-1)
+       end do
+       call MPI_gatherv ( nx2, 1, MPI_INTEGER, &
+            this%recvcounts, recvcounts_loc, displs_loc, MPI_INTEGER,&
+            iroot, mpic, ierr )
+       if (.not. mapl_am_i_root()) then
+          this%recvcounts(:) = 0
        end if
+       this%displs(1)=0
+       do i=2, petcount
+          this%displs(i) = this%displs(i-1) + this%recvcounts(i-1)
+       end do
+
+       nsend = nx2
+       call MPI_gatherv ( lons_chunk, nsend, MPI_REAL8, &
+            lons, this%recvcounts, this%displs, MPI_REAL8,&
+            iroot, mpic, ierr )
+       call MPI_gatherv ( lats_chunk, nsend, MPI_REAL8, &
+            lats, this%recvcounts, this%displs, MPI_REAL8,&
+            iroot, mpic, ierr )
+
+
+!!       if (mapl_am_I_root()) write(6,*) 'nobs tot :', nx
+
+       deallocate (this%recvcounts, this%displs, _STAT)
+       deallocate (recvcounts_loc, displs_loc, _STAT)
+       deallocate (x, y, _STAT)
+       call MAPL_TimerOff(this%GENSTATE,"1_genABIgrid")
 
 
        ! __ s2. set distributed LS
        !
+       call MAPL_TimerOn(this%GENSTATE,"2_ABIgrid_LS")
+
+       ! -- root
        locstream_factory = LocStreamFactory(lons,lats,_RC)
        LS_rt = locstream_factory%create_locstream(_RC)
+
+       ! -- proc
+       locstream_factory = LocStreamFactory(lons_chunk,lats_chunk,_RC)
+       LS_chunk = locstream_factory%create_locstream_on_proc(_RC)
+
+       ! -- distributed with background grid
        call ESMF_FieldBundleGet(this%bundle,grid=grid,_RC)
-       LS_ds = locstream_factory%create_locstream(grid=grid,_RC)
+       LS_ds = locstream_factory%create_locstream_on_proc(grid=grid,_RC)
 
-       fieldA = ESMF_FieldCreate (LS_rt, name='A', typekind=ESMF_TYPEKIND_R8, _RC)
+       fieldA = ESMF_FieldCreate (LS_chunk, name='A', typekind=ESMF_TYPEKIND_R8, _RC)
        fieldB = ESMF_FieldCreate (LS_ds, name='B', typekind=ESMF_TYPEKIND_R8, _RC)
-
        call ESMF_FieldGet( fieldA, localDE=0, farrayPtr=ptA)
        call ESMF_FieldGet( fieldB, localDE=0, farrayPtr=ptB)
-       if (mypet == 0) then
-          ptA(:) = lons(:)
-       end if
+
+       ptA(:) = lons_chunk(:)
        call ESMF_FieldRedistStore (fieldA, fieldB, RH, _RC)
+       call MPI_Barrier(mpic,ierr)
+       _VERIFY (ierr)
        call ESMF_FieldRedist      (fieldA, fieldB, RH, _RC)
        lons_ds = ptB
 
-       if (mypet == 0) then
-          ptA(:) = lats(:)
-       end if
+       ptA(:) = lats_chunk(:)
+       call MPI_Barrier(mpic,ierr)
+       _VERIFY (ierr)
        call ESMF_FieldRedist      (fieldA, fieldB, RH, _RC)
        lats_ds = ptB
 
-       call ESMF_FieldRedistRelease(RH, noGarbage=.true., _RC)
+!!       write(6,*)  'ip, size(lons_ds)=', mypet, size(lons_ds)
+
        call ESMF_FieldDestroy(fieldA,nogarbage=.true.,_RC)
        call ESMF_FieldDestroy(fieldB,nogarbage=.true.,_RC)
+       call ESMF_FieldRedistRelease(RH, noGarbage=.true., _RC)
+
+       call MAPL_TimerOff(this%GENSTATE,"2_ABIgrid_LS")
 
 
        ! __ s3. find n.n. CS pts for LS_ds (halo)
        !
+       call MAPL_TimerOn(this%GENSTATE,"3_CS_halo")
        obs_lons = lons_ds * MAPL_DEGREES_TO_RADIANS_R8
        obs_lats = lats_ds * MAPL_DEGREES_TO_RADIANS_R8
        nx = size ( lons_ds )
@@ -407,6 +478,7 @@ module subroutine create_Geosat_grid_find_mask(this, rc)
              end if
           end do
        end do
+       call MAPL_TimerOff(this%GENSTATE,"3_CS_halo")
 
 
        ! ----
@@ -415,6 +487,7 @@ module subroutine create_Geosat_grid_find_mask(this, rc)
        !  - mpi_gatherV
        !
 
+       call MAPL_TimerOn(this%GENSTATE,"4_gatherV")
 
        ! __ s4.1 find this%lons/lats on root for NC output
        !
@@ -442,11 +515,11 @@ module subroutine create_Geosat_grid_find_mask(this, rc)
 
        ! __ s4.2  find this%recvcounts / this%displs
        !
-       allocate( this%recvcounts(npes), this%displs(npes), _STAT )
-       allocate( recvcounts_loc(npes), displs_loc(npes), _STAT )
+       allocate( this%recvcounts(petcount), this%displs(petcount), _STAT )
+       allocate( recvcounts_loc(petcount), displs_loc(petcount), _STAT )
        recvcounts_loc(:)=1
        displs_loc(1)=0
-       do i=2, npes
+       do i=2, petcount
           displs_loc(i) = displs_loc(i-1) + recvcounts_loc(i-1)
        end do
        call MPI_gatherv ( this%npt_mask, 1, MPI_INTEGER, &
@@ -456,7 +529,7 @@ module subroutine create_Geosat_grid_find_mask(this, rc)
           this%recvcounts(:) = 0
        end if
        this%displs(1)=0
-       do i=2, npes
+       do i=2, petcount
           this%displs(i) = this%displs(i-1) + this%recvcounts(i-1)
        end do
 
@@ -471,6 +544,8 @@ module subroutine create_Geosat_grid_find_mask(this, rc)
             this%lats, this%recvcounts, this%displs, MPI_REAL8,&
             iroot, mpic, ierr )
 
+       call MAPL_TimerOff(this%GENSTATE,"4_gatherV")
+
        _RETURN(_SUCCESS)
      end subroutine create_Geosat_grid_find_mask
 
@@ -589,7 +664,7 @@ module subroutine regrid_append_file(this,current_time,rc)
     integer :: i, j, k, rank
     integer :: nx, nz
     integer :: ix, iy, m
-    integer :: mypet, npes, nsend
+    integer :: mypet, petcount, nsend
     integer :: iroot, ierr
     integer :: mpic
     integer, allocatable :: recvcounts_3d(:)
@@ -602,7 +677,7 @@ module subroutine regrid_append_file(this,current_time,rc)
 
     ! -- fixed for all fields
     call ESMF_VMGetCurrent(vm,_RC)
-    call ESMF_VMGet(vm, mpiCommunicator=mpic, petcount=npes, localpet=mypet, _RC)
+    call ESMF_VMGet(vm, mpiCommunicator=mpic, petcount=petcount, localpet=mypet, _RC)
     iroot=0
     nx = this%npt_mask
     nz = this%vdata%lm
@@ -615,7 +690,7 @@ module subroutine regrid_append_file(this,current_time,rc)
        allocate ( p_dst_2d_full (0), _STAT )
        allocate ( p_dst_3d_full (0), _STAT )
     end if
-    allocate( recvcounts_3d(npes), displs_3d(npes), _STAT )
+    allocate( recvcounts_3d(petcount), displs_3d(petcount), _STAT )
     recvcounts_3d(:) = nz * this%recvcounts(:)
     displs_3d(:)     = nz * this%displs(:)