Ignore:
Timestamp:
Dec 10, 2010 8:08:13 AM (11 years ago)
Author:
raasch
Message:

New:
---

Optional barriers included in order to speed up collective operations
MPI_ALLTOALL and MPI_ALLREDUCE. This feature is controlled with new initial
parameter collective_wait. Default is .FALSE, but .TRUE. on SGI-type
systems. (advec_particles, advec_s_bc, buoyancy, check_for_restart,
cpu_statistics, data_output_2d, data_output_ptseries, flow_statistics,
global_min_max, inflow_turbulence, init_3d_model, init_particles, init_pegrid,
init_slope, parin, pres, poismg, set_particle_attributes, timestep,
read_var_list, user_statistics, write_compressed, write_var_list)

Adjustments for Kyushu Univ. (lcrte, ibmku). Concerning hybrid
(MPI/openMP) runs, the number of openMP threads per MPI tasks can now
be given as an argument to mrun-option -O. (mbuild, mrun, subjob)

Changed:


Initialization of the module command changed for SGI-ICE/lcsgi (mbuild, subjob)

Errors:


File:
1 edited

Legend:

Unmodified
Added
Removed
  • palm/trunk/SOURCE/timestep.f90

    r392 r622  
    44! Current revisions:
    55! -----------------
    6 !
     6! optional barriers included in order to speed up collective operations
    77!
    88! Former revisions:
     
    118118          uv_gtrans_l = uv_gtrans_l / REAL( (nxr-nxl+1)*(nyn-nys+1)*(nzt-nzb) )
    119119#if defined( __parallel )
     120          IF ( collective_wait )  CALL MPI_BARRIER( comm2d, ierr )
    120121          CALL MPI_ALLREDUCE( uv_gtrans_l, uv_gtrans, 2, MPI_REAL, MPI_SUM, &
    121122                              comm2d, ierr )
     
    164165!$OMP END PARALLEL
    165166#if defined( __parallel )
     167       IF ( collective_wait )  CALL MPI_BARRIER( comm2d, ierr )
    166168       CALL MPI_ALLREDUCE( dt_diff_l, dt_diff, 1, MPI_REAL, MPI_MIN, comm2d, &
    167169                           ierr )
     
    252254!--       Determine the global minumum
    253255#if defined( __parallel )
     256          IF ( collective_wait )  CALL MPI_BARRIER( comm2d, ierr )
    254257          CALL MPI_ALLREDUCE( dt_plant_canopy_l, dt_plant_canopy, 1, MPI_REAL,  &
    255258                              MPI_MIN, comm2d, ierr )
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