Small fixes.

MemoryHierarchy/bench.pl

@@ -3,11 +3,17 @@ use strict;
 use warnings;
 use utf8;
 
+if ( $#ARGV < 2 ){
+    print "Usage: ./bench.pl <numcores> <seq|tp|ws> <SMT>\n";
+    exit;
+}
+
 my $numCores = $ARGV[0];
 my $type =  0;
 my $SMT = $ARGV[2] ? $ARGV[2] : 2;
 my $N = 100;
 
+
 if ( $ARGV[1] eq 'seq' ){
     $type = 0;
 } elsif (  $ARGV[1] eq 'tp'  ){
@@ -24,7 +30,6 @@ while ( $N < 8000000 ) {
     while ( $performance eq '0.00' ){
         $result =  `likwid-pin -c E:S0:$numCores:1:$SMT -q ./striad $type $N`;
         $result =~ /([0-9.]+) ([0-9.]+)/;
-        my $size = $1;
         $performance = $2;
     }