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1
3 package org.jgroups.debug;
4
5 import java.io.FileOutputStream  ;
6 import java.io.OutputStream ;
7 import java.util.Enumeration ;
8 import java.util.Hashtable ;
9
10
16 public class Profiler {
17
18 static public class Entry {
19 long num_calls=0;
20 long tot_time=0;
21 double avg=0.0;
22 long start_time=0;
23 long stop_time=0;
24
25 synchronized void compute() {
26 num_calls++;
27 tot_time+=stop_time - start_time;
28 avg=(double)tot_time / num_calls;
29 }
30 }
31
32
33 private static OutputStream os=null;
34 private static final Hashtable entries=new Hashtable ();
35
36
37 public Profiler() {
38 try {
39 os=new FileOutputStream ("profiler.dat");
40 }
41 catch(Exception e) {
42 System.err.println(e);
43 }
44 }
45
46
47 public static void setFilename(String filename) {
48 try {
49 if(os != null) {
50 os.close();
51 }
52 os=new FileOutputStream (filename);
53 }
54 catch(Exception e) {
55 System.err.println(e);
56 }
57 }
58
59
60 public static void start(String call_name) {
61 Entry e=(Entry)entries.get(call_name);
62 if(e == null) {
63 e=new Entry();
64 entries.put(call_name, e);
65 }
66 e.start_time=System.currentTimeMillis();
67 }
68
69
70 public static void stop(String call_name) {
71 Entry e=(Entry)entries.get(call_name);
72 if(e == null) {
73 System.err.println("Profiler.stop(): entry for " + call_name + " not found");
74 return;
75 }
76 e.stop_time=System.currentTimeMillis();
77 e.compute();
78 }
79
80
81 public static void dump() { String key;
83 Entry val;
84 if(os == null) {
85 System.err.println("Profiler.dump(): output file is null");
86 return;
87 }
88 try {
89 os.write("Key: Number of calls: Total time (ms): Average time (ms):\n".getBytes());
90 os.write("-----------------------------------------------------------------\n\n".getBytes());
91 }
92 catch(Exception e) {
93 System.err.println(e);
94 }
95 for(Enumeration e=entries.keys(); e.hasMoreElements();) {
96 key=(String )e.nextElement();
97 val=(Entry)entries.get(key);
98 try {
99 os.write((key + ": " + val.num_calls + ' ' +
100 val.tot_time + ' ' + trim(val.avg) + '\n').getBytes());
101 }
102 catch(Exception ex) {
103 System.err.println(ex);
104 }
105 }
106 }
107
108
109 public static double trim(double inp) {
110 double retval=0.0, rem=0.0;
111 long l1, l2;
112
113 l1=(long)inp;
114 rem=inp - l1;
115 rem=rem * 100.0;
116 l2=(long)rem;
117 rem=l2 / 100.0;
118 retval=l1 + rem;
119 return retval;
120 }
121
122
123 public static void main(String [] args) {
124 Profiler.setFilename("bela.out");
125
126
127 try {
128
129 Profiler.start("time1");
130 Thread.sleep(1500);
131 Profiler.stop("time1");
132
133 Profiler.start("time1");
134 Thread.sleep(1500);
135 Profiler.start("time2");
136 Thread.sleep(500);
137
138 Profiler.stop("time2");
139 Thread.sleep(1500);
140 Profiler.stop("time1");
141
142
143 Profiler.dump();
144 }
145 catch(Exception e) {
146 System.err.println(e);
147 }
148 }
149 }
150 |
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