diff --git a/bench.pl b/bench.pl
index ed28d1c..69c91eb 100755
--- a/bench.pl
+++ b/bench.pl
@@ -7,10 +7,11 @@ my $CMD = $ARGV[0];
 my @N =  split /-/, $ARGV[1];
 my $R = $ARGV[2];
 my $MAX = 0; my $CORES = 0; my $BENCH = '';
+my $SMT = $ARGV[3] ? $ARGV[3] : 2;
 
 foreach my $numcores ( $N[0] ... $N[1] ) {
     foreach ( 1 ... $R ) {
-        foreach my $ln ( split /\n/, `likwid-pin -c E:S0:$numcores:1:2 $CMD` ){
+        foreach my $ln ( split /\n/, `likwid-pin -c E:S0:$numcores:1:$SMT $CMD` ){
             if ( $ln =~ /^([A-Za-z]+):[ ]+([0-9.]+) /) {
                 if ( $MAX < $2 ){
                     $MAX = $2; $CORES = $numcores; $BENCH = $1;