use jitter ratio to gap

qstream-check-bb

@@ -23,7 +23,7 @@ my $report_host = `hostname -f`;
 
 $span_limit=[0,1,9]; # sec
 $bw_limit=[0,2000000, 30000]; # bps
-$jitter_limit=[0, 2, 10 ]; # ms
+$jitter_limit=[0, 2, 5 ]; # jitter_factor
 $loss_limit=[0, 0.1, 1 ]; # %
 
 $bb_color=["red", "yellow", "green"];
@@ -50,7 +50,10 @@ sub process_flow {
     
     if ( $xml){ # successful parsing
 	foreach $flow ( $xml->{flow}){
-	    my $jratio= $flow->{pcr_jitter}->{pcr_jitter_avg} / $flow->{network_stats}->{gap_avg};
+	    my $jratio=0;
+	    if ($flow->{network_stats}->{gap_avg} > 0 ){
+		my $jratio= $flow->{pcr_jitter}->{pcr_jitter_avg} / $flow->{network_stats}->{gap_avg};
+	    }
 	    &bb_report("Response", $flow->{flow_name}, bb_color($span_limit, $bb_color, $flow->{span}), $flow->{span} );
 	    &bb_report("Jitter", $flow->{flow_name}, bb_color($jitter_limit, $rev_color,$jratio), 
 		       $flow->{pcr_jitter}->{pcr_jitter_avg} );