#!/usr/bin/perl -w
use strict;
use GRID::Machine;

my $host = $ENV{GRID_REMOTE_MACHINE};
my $machine = GRID::Machine->new( host => $host );

my ($N, $np, $pi)  = (1000, 4, 0);
for (0..$np-1) {
   $machine->fork( q{
       my ($id, $N, $np) = @_;
         
       my $sum = 0;
       for (my $i = $id; $i < $N; $i += $np) {
           my $x = ($i + 0.5) / $N;
           $sum += 4 / (1 + $x * $x);
       }
       $sum /= $N; 
    },
    args => [ $_, $N, $np ],
  );
}

$pi += $machine->waitall()->result for 1..$np;

print "pi = $pi\n";