add pps (packet per second) format

public/app/components/kbn.js

@@ -383,6 +383,7 @@ function($, _, moment) {
   kbn.valueFormats.mbytes = kbn.formatFuncCreator(1024, [' MiB', ' GiB', ' TiB', ' PiB', ' EiB', ' ZiB', ' YiB']);
   kbn.valueFormats.gbytes = kbn.formatFuncCreator(1024, [' GiB', ' TiB', ' PiB', ' EiB', ' ZiB', ' YiB']);
   kbn.valueFormats.bps = kbn.formatFuncCreator(1000, [' bps', ' Kbps', ' Mbps', ' Gbps', ' Tbps', ' Pbps', ' Ebps', ' Zbps', ' Ybps']);
+  kbn.valueFormats.pps = kbn.formatFuncCreator(1000, [' pps', ' Kpps', ' Mpps', ' Gpps', ' Tpps', ' Ppps', ' Epps', ' Zpps', ' Ypps']);
   kbn.valueFormats.Bps = kbn.formatFuncCreator(1000, [' Bps', ' KBps', ' MBps', ' GBps', ' TBps', ' PBps', ' EBps', ' ZBps', ' YBps']);
   kbn.valueFormats.short = kbn.formatFuncCreator(1000, ['', ' K', ' Mil', ' Bil', ' Tri', ' Quadr', ' Quint', ' Sext', ' Sept']);
   kbn.valueFormats.joule = kbn.formatFuncCreator(1000, [' J', ' kJ', ' MJ', ' GJ', ' TJ', ' PJ', ' EJ', ' ZJ', ' YJ']);
@@ -564,6 +565,7 @@ function($, _, moment) {
       {
         text: 'data rate',
         submenu: [
+          {text: 'packets/sec', value: 'pps'},
           {text: 'bits/sec', value: 'bps'},
           {text: 'bytes/sec', value: 'Bps'},
         ]

public/app/panels/graph/graph.js

@@ -480,6 +480,9 @@ function (angular, $, kbn, moment, _, GraphTooltip) {
             case 'bps':
               url += '&yUnitSystem=si';
               break;
+            case 'pps':
+              url += '&yUnitSystem=si';
+              break;
             case 'Bps':
               url += '&yUnitSystem=si';
               break;