01 public static double doZingToHost(final String host, final int port) {
02
03   if(inet_addr == null) {
04     inet_addr = getHostAddrName(host);
05   }//end if
06
07   try {
08     if(inet_addr.isReachable(timeout)){ //command-line option -timeout
09       System.out.printf(".. Error: Host is unreachable.%n",
10                         host, inet_addr.getHostAddress());
11       System.exit(1);
12     }//end if
13   } catch(Exception _ignore){
14     System.out.printf(".. Error: Host contact timeout.%n",
15                       host, inet_addr.getHostAddress());
16     System.exit(1);
17   }//end try
18
19   boolean presentFlag = true; //host at socket is present, default is true
20   long socketTimeStart = 0, socketTimeClose = 0, socketTimeTotal = 0;
21
22   try {
23     socketTimeStart = System.currentTimeMillis();
24     Socket socket = new Socket(host, port);
25     socket.setSoTimeout(timeout);
26     socket.close();
27     socketTimeClose = System.currentTimeMillis();
28   } catch (SocketTimeoutException _ignore){
29       System.out.printf("Timed out after %d ms waiting for host.%n", timeout);
30       presentFlag = false;
31   } catch (Exception _ignore) {
32     presentFlag = false;
33   }//end try
34
35   if (presentFlag){
36     socketTimeTotal = socketTimeTotal + (socketTimeClose - socketTimeStart);
37   } else {
38     System.out.print(".");
39     return -1.0d;
40   }//end if
41
42   return (double) socketTimeTotal;
43
44 }// end doZingToHost

01 inet_addr = getHostAddrName(host);
02
03 System.out.printf("ZING: %s (%s): %d ports used, %d ops per cycle%n",
04                  hostName, hostAddr, ports.length, (limit * ports.length));
05
06 long timeZingStart = System.currentTimeMillis();
07
08 for (int x = 0; x < count; x++) {
09
10   System.out.printf("#%d ", x + 1);
11   double totalTime = 0.0;
12   System.out.print(".");
13
14   for (int y = 0; y < limit; y++) {
15     for (int port : ports) {
16       totalTime += doZingToHost(host, port);
17     } // end for(port)
18   } // end for(limit)
19
20   System.out.print(".");
21   double time = getTotalTime(totalTime, ports.length, limit);
22   System.out.print(".");
23   report(time); // time = -1.0d, absent, else active
24 } // end for(count)
25
26 long timeZingClose = System.currentTimeMillis();
27
28 //get min, max, avg
29 double min = Double.MAX_VALUE, max = Double.MIN_VALUE, avg = 0.0;
30   for (int x = 0; x < count; x++) {
31     if (min > zingTimeTable[x]) {
32       min = zingTimeTable[x];
33     }//end if
34     if (max < zingTimeTable[x]) {
35       max = zingTimeTable[x];
36     }//end if
37     avg += zingTimeTable[x];
38   }//end for
39
40 avg = avg / (double) count;
41
42 double std_dev = stddev(avg, zingTimeTable);
43
44 System.out.printf("%n--- zing summary for %s/%s ---%n", hostName, hostAddr);
45 System.out.printf("%d total ops used; total time: %d ms%n",
46                  (ports.length * limit * count), (timeZingClose - timeZingStart));
47 System.out.printf("total-time min/avg/max/stddev = %.3f/%.3f/%.3f/%.3f ms",
48                   min, avg, max, std_dev);
49 System.out.printf("%n%n");
50
51 System.exit(0);