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C Copyright (c) 2003-2010 University of Florida
C
C This program is free software; you can redistribute it and/or modify
C it under the terms of the GNU General Public License as published by
C the Free Software Foundation; either version 2 of the License, or
C (at your option) any later version.
C This program is distributed in the hope that it will be useful,
C but WITHOUT ANY WARRANTY; without even the implied warranty of
C MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
C GNU General Public License for more details.
C The GNU General Public License is included in this distribution
C in the file COPYRIGHT.
subroutine assign_companies(hosts, nprocs,
* company,
* managers_are_workers,
* master_is_worker,
* io_company_id)
c-------------------------------------------------------------------------
c
c Assigns companies and roles within the companies based on the
c company requirements in the "company" common block and the
c hardware resources in the arguments.
c
c Arguments:
c hosts Host identifiers.
c nprocs Number of processors.
c company Output array containing the assigned company
c IDs.
c mem_assigned Output array containing the memory assignment
c for each processor.
c managers_are_workers Flag indicating whether or not managers can
c also be assigned as workers.
c master_is_worker Flag indicating whether the master is allowed
c to join a company as a worker.
c io_company_id ID of a special company used for I/O servers.
c We attempt to map one server per node if
c possible.
c
c-----------------------------------------------------------------------------
implicit none
include 'mpif.h'
include 'company.h'
include 'proto_defines.h'
integer nprocs
integer hosts(nprocs)
integer company(nprocs)
integer io_company_id
integer i, j, icompany, nm, nw, navail, memreq, ierr
integer id_host, nmgr, nwrkr, mgr_mem, wrkr_mem, id
integer nmapped, last_host
integer master, pst_get_master
logical managers_are_workers, manager_mapped
logical master_is_worker
do i = 1, nprocs
company(i) = MPI_UNDEFINED
enddo
master = pst_get_master()
c---------------------------------------------------------------------------
c Check for not enough processes.
c---------------------------------------------------------------------------
nwrkr = 0
do i = 1, max_company
if (c_table(i, c_company_id) .ne. MPI_UNDEFINED)
* nwrkr = nwrkr + c_table(i, c_nwrkr)
enddo
if (nwrkr .ne. nprocs) then
print *,'Error: COMPANY params have requested ',nwrkr,
* ' processors, but the mpirun has ',nprocs
call mpi_abort(mpi_comm_world, 1, ierr)
endif
c---------------------------------------------------------------------------
c If io_company_id .ne. 0, map the I/O company first.
c--------------------------------------------------------------------------
if (io_company_id .ne. 0) then
do icompany = 1, max_company
id = c_table(icompany, c_company_id)
if (id .eq. io_company_id) then
nwrkr = c_table(icompany, c_nwrkr)
nmapped = 0
c----------------------------------------------------------------------------
c Map "nwrkr" processes, one per host, if possible.
c----------------------------------------------------------------------------
20 continue
last_host = -1
do i = 2, nprocs ! never map proc 0 to io_company_id
if (hosts(i) .ne. last_host .and.
* company(i) .eq. MPI_UNDEFINED) then
company(i) = id ! map the processor.
nmapped = nmapped + 1
last_host = hosts(i)
if (nmapped .eq. nwrkr) go to 50
endif
enddo
50 continue
c----------------------------------------------------------------------------
c Not enough nodes. Continue allocating one per node until exhausted.
c----------------------------------------------------------------------------
if (nmapped .lt. nwrkr) go to 20
endif
enddo
endif
100 continue
c-----------------------------------------------------------------------------
c Map the remaining companies, with as many as possible sharing the
c same node.
c-----------------------------------------------------------------------------
do icompany = 1, max_company
id = c_table(icompany, c_company_id)
if (id .ne. io_company_id .and.
* id .ne. MPI_UNDEFINED) then
nwrkr = c_table(icompany, c_nwrkr)
nmapped = 0
do i = 1, nprocs
if (company(i) .eq. MPI_UNDEFINED) then
company(i) = id ! map the processor to this company.
nmapped = nmapped + 1
if (nmapped .eq. nwrkr) go to 200
endif
enddo
200 continue
if (nmapped .ne. nwrkr) then
print *,'Error: Unable to map all processors ',
* ' of company ',id
print *,'Current state of company mapping:'
do i = 1, nprocs
print *,'Rank ',i,' host ',hosts(i),
* ' company ',company(i)
enddo
call mpi_abort(mpi_comm_world, 1, ierr)
endif
endif
enddo
return
end
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