use warnings;
use strict;
use Spreadsheet::WriteExcel;

my $workbook = Spreadsheet::WriteExcel->new("data.xls");
my $worksheet = $workbook->add_worksheet();

$worksheet->write ("A1", 'Device');
$worksheet->write ("B1", '/var');
$worksheet->write ("C1", '/');
$worksheet->write ("D1", 'interleaved');

my $row = 2;

open inFile, '<', 'data.txt' or die "Couldn't open data.txt: $!";

while (<inFile>)
  {
  my ($p1, $p2, $p3, $device) = /(?:\. ){3}(\d+)%\s\/var\s(\d+).*?(\d+)%\sInterleaved (\w+)/;
  $worksheet->write("A$row", $device);
  $worksheet->write("B$row", $p1);
  $worksheet->write("C$row", $p2);
  $worksheet->write("D$row", $p3);
  ++$row;
  print "$device $p1, $p2, $p3\n";
  }

$workbook->close ();
close inFile;