01: /*
02: * Copyright (c) 1998-2002 Carnegie Mellon University. All rights
03: * reserved.
04: *
05: * Redistribution and use in source and binary forms, with or without
06: * modification, are permitted provided that the following conditions
07: * are met:
08: *
09: * 1. Redistributions of source code must retain the above copyright
10: * notice, this list of conditions and the following disclaimer.
11: *
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in
14: * the documentation and/or other materials provided with the
15: * distribution.
16: *
17: * THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND
18: * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
19: * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
20: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY
21: * NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27: * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28: *
29: */
30:
31: package rcm.util;
32:
33: public abstract class Mem {
34:
35: public static long free() {
36: return Runtime.getRuntime().freeMemory();
37: }
38:
39: public static long used() {
40: Runtime r = Runtime.getRuntime();
41: return r.totalMemory() - r.freeMemory();
42: }
43:
44: public static long total() {
45: return Runtime.getRuntime().totalMemory();
46: }
47:
48: public static String getReport() {
49: return "Memory: used " + (used() / 1000) + "KB, free "
50: + (free() / 1000) + "KB, total " + (total() / 1000)
51: + "KB";
52: }
53:
54: public static void gc() {
55: Runtime r = Runtime.getRuntime();
56: r.runFinalization();
57: r.gc();
58: }
59:
60: public static void dumpThreadInfo() {
61: ThreadGroup g = Thread.currentThread().getThreadGroup();
62: Thread[] t = new Thread[g.activeCount()];
63: g.enumerate(t);
64: System.err.println("Active threads in " + g);
65: for (int i = 0; i < t.length; ++i)
66: System.err.println(t[i]);
67: }
68:
69: }
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