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#if HAVE_CONFIG_H
# include "config.fh"
#endif
C
C Test the minval, minloc, maxval, maxloc, and enum functions in GA.
C
program main
implicit none
#include "mafdecls.fh"
#include "global.fh"
integer heap, stack, fudge, ma_heap, me, nproc
logical status
parameter (heap=100*100*4, fudge=100, stack=100*100)
c
c*** Intitialize a message passing library
c
#include "mp3.fh"
c
c*** Initialize GA
c
c There are 2 choices: ga_initialize or ga_initialize_ltd.
c In the first case, there is no explicit limit on memory usage.
c In the second, user can set limit (per processor) in bytes.
c
call ga_initialize()
nproc = ga_nnodes()
me = ga_nodeid()
c we can also use GA_set_memory_limit BEFORE first ga_create call
c
if(ga_nodeid().eq.0)then
print *,' GA initialized ', nproc, stack, heap
call ffflush(6)
endif
c
c*** Initialize the MA package
c MA must be initialized before any global array is allocated
c
status = ma_init(MT_DCPL, stack, heap)
if (.not. status) call ga_error('ma_init failed',-1)
c
if(me.eq.0)then
print *, 'using ', nproc, ' process(es)'
call ffflush(6)
endif
c
call test_nga_select_elem() ! Test global max/min
call test_ga_patch_enum() ! Test enumerate
c if(me.eq.0) call ga_print_stats()
c
c*** Tidy up the GA package
c
call ga_terminate()
c
c*** Tidy up after message-passing library
c
call MP_FINALIZE()
c
end
subroutine test_nga_select_elem()
implicit none
#include "mafdecls.fh"
#include "global.fh"
#include "testutil.fh"
integer m ! grid size
parameter (m = 10)
integer g_a ! handles to global arrays
integer ilo, ihi
integer i
integer me, nproc ! my processor & number of procs
integer ndim,dims(1),chunck(1)
integer num ! number of values per proc
integer iv(m) ! scatter index array
double precision v(m) ! scatter value array
integer iran
c
integer ilocmax, ilocmin
integer ilocmax_ga, ilocmin_ga
double precision xmax1, xmin1
double precision xmax_ga, xmin_ga
c
iran(i) = int(drand(1)*real(i)) + 1
c
c*** check parallel environment
me = ga_nodeid()
nproc = ga_nnodes()
c
c*** create a global 1-D array
ndim=1
dims(1)=100
chunck(1)=20
if (.not. nga_create(MT_DBL, ndim, dims, 'array', chunck, g_a))
$ call ga_error(' ga_create failed ',0)
c
c*** compute local ilo, ihi, num for each processor
call nga_distribution(g_a,me,ilo,ihi)
num=ihi-ilo+1
if(ihi.le.0)num=0
* print *, 'me=',me, num,ilo
c
c*** scatter some values into the global array
call ga_fill(g_a,0.0d+00)
do i=1,Min(num,m)
v(i)=real(ilo+i-1)
iv(i)=ilo+i-1
* print *,'me=',me,'val=',iv(i)
enddo
if(num.gt.0)call NGA_scatter(g_a,v,iv,Min(num,m))
call ga_sync()
if(me.eq.0)then
ilocmax = Mod(iran(50000000),dims(1))
ilocmin = Mod(iran(1000000),dims(1))
C if(ilocmin.eq.ilocmax) ilocmin=Mod(ilocmin+1,dims(1)-1)
xmax1 = drand(0)*real(ilo) + dims(1)
xmin1= -1
call nga_put(g_a,ilocmin,ilocmin,xmin1,1)
call nga_put(g_a,ilocmax,ilocmax,xmax1,1)
endif
c call ga_print(g_a)
c
c*** Find the maximum value and the index of the maximum value
call nga_select_elem(g_a,'max',xmax_ga,ilocmax_ga)
c*** Find the minimum value and the index of the minimum value
call nga_select_elem(g_a,'min',xmin_ga,ilocmin_ga)
c
c
if(me.eq.0)then
print *," "
print *,"Correct Max: value=",xmax1 ," location=",ilocmax
print *," GA Max: value=",xmax_ga," location=",ilocmax_ga
print *," "
print *,"Correct Min: value=",xmin1 ," location=",ilocmin
print *," GA Min: value=",xmin_ga," location=",ilocmin_ga
endif
c
if(.not. ga_destroy(g_a)) call ga_error('invalid handle: g_a',0)
c
return
end
subroutine test_ga_patch_enum()
implicit none
#include "mafdecls.fh"
#include "global.fh"
integer m ! grid size
parameter (m = 10)
integer g_a, g_b, g_c ! handles to INT global arrays
integer ilo, ihi
integer i,j,cmin,cmax,nelem
integer me, nproc ! my processor & number of procs
integer ndim,dims,chunk(1)
integer num ! number of values per proc
integer iv(m) ! scatter index and value array
c
c*** check parallel environment
me = ga_nodeid()
nproc = ga_nnodes()
c
c*** compute local ilo, ihi, num for each processor
c ilo=1+me*m
c ihi=(me+1)*m
c num=ihi-ilo+1
c
c*** create the global 1-D arrays
ndim=1
dims=100
chunk(1)=40
if (.not. nga_create(MT_INT, ndim, dims, 'array a', chunk, g_a))
$ call ga_error(' ga_create failed ',0)
if (.not. nga_create(MT_INT, ndim, dims, 'array b', chunk, g_b))
$ call ga_error(' ga_create failed ',0)
if (.not. nga_create(MT_INT, ndim, dims, 'array c', chunk, g_c))
$ call ga_error(' ga_create failed ',0)
c
c*** Enumerate a each patch to get a sequential vector.
call ga_patch_enum(g_b,1,dims,1,1)
c call ga_print(g_b)
c
c*** enumerate manually g_a
call nga_distribution(g_a,me,ilo,ihi)
if(ilo.gt.0) then
do i = ilo,ihi,m
nelem = MIN(m, ihi-i+1)
do j = 1, nelem
iv(j)=i + j-1
enddo
call nga_put(g_a,i,i+nelem -1,iv,1)
enddo
endif
c call ga_print(g_a)
c
c*** g_c = -1 * g_a + 1 * g_b (hopefully all results will be zero)
call ga_add(-1,g_a,1,g_b,g_c)
c call ga_print(g_c)
c
c find min and max values
call nga_select_elem(g_c,'min',cmin,ilo)
call nga_select_elem(g_c,'max',cmax,ihi)
if(me.eq.0)then
if(cmin.ne.cmax .or. cmin.ne.0)then
print *,'Failed',cmin,cmax
else
print *,"GA_PATCH_ENUM successful"
endif
endif
c
if(.not. ga_destroy(g_a)) call ga_error('invalid handle: g_a',0)
if(.not. ga_destroy(g_b)) call ga_error('invalid handle: g_b',0)
if(.not. ga_destroy(g_c)) call ga_error('invalid handle: g_c',0)
c
return
end
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