#!/usr/bin/perl -w
use strict;
use Config;
use Cwd;
my $file = "t/11_mpi_scattergatherarray.pl";
local(*OUTF);
open(OUTF, ">$file") or die "Cannot open $file for writing: $!\n";
print OUTF $Config{startperl} . " -I" . Cwd::cwd . "/blib/arch" .
" -I" . Cwd::cwd . "/blib/lib\n";
print "Writing $file\n";
while(<DATA>) { print OUTF $_ }
close(OUTF);
chmod(0755, $file);
__END__
$|=1;
use Parallel::MPI qw(:all);
MPI_Init();
$my_rank = MPI_Comm_rank(MPI_COMM_WORLD);
my @message = (0.31337, 0.666, 0.42448, 0.777);
my @sendbuf = @message;
my @recvbuf;
print "RANK $my_rank: SCATTER\n";
MPI_Scatter(\@sendbuf, 2, MPI_FLOAT,
\@recvbuf, 2, MPI_FLOAT, 0, MPI_COMM_WORLD);
print "RANK $my_rank: RECVBUF=\"@recvbuf\"\n";
@sendbuf = ();
MPI_Gather(\@recvbuf, 2, MPI_FLOAT,
\@sendbuf, 2, MPI_FLOAT, 0, MPI_COMM_WORLD);
if ($my_rank == 0) {
my $flag;
printf "FINAL BUF = @sendbuf\n";
foreach (0..$#sendbuf) {
if($sendbuf[$_] != $message[$_]) {
$flag = 1; last;
}
}
unless ($flag) {
print "ok 1\n";
} else {
print "not ok 1\n";
}
}
MPI_Finalize();