Hrm, looking at your post history it would seem all your questions so far are somehow related to lines like these. Are you making progress I hope? The following code demonstrates the basic ideas you'll probably employ, but you'll need to make a few changes too I think.

my %range_counts = ();
my %counts = ();
while( $entire_file =~ m/(\d+)bn(\d+), bytes/sg ) {
    $range_counts{'4kset'} ++ if $2 > 4000 and $2 < 6000;
    $counts{$2} ++ if $2 > 4000 and $2 < 6000;
}

print "there were $counts{'4kset'} 4000-6000 lines\n";
[download]

I suspect you'd also benifit from pouring the results into a database of some kind. Then you could run queries like SELECT sum(something_column), avg(something_column) FROM data WHERE something>something and something < something and report on all kinds of interesting details.

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