Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/tools/ObjectHistogram.java @ 626:87fa6e083d82
6760309: G1: update remembered sets during Full GCs
Reviewed-by: iveresov, tonyp
author | apetrusenko |
---|---|
date | Tue, 10 Mar 2009 00:47:05 -0700 |
parents | a61af66fc99e |
children | c18cbe5936b8 |
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/* * Copyright 2002-2005 Sun Microsystems, Inc. All Rights Reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ package sun.jvm.hotspot.tools; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.oops.*; import sun.jvm.hotspot.runtime.*; import java.io.PrintStream; /** A sample tool which uses the Serviceability Agent's APIs to obtain an object histogram from a remote or crashed VM. */ public class ObjectHistogram extends Tool { public void run() { run(System.out, System.err); } public void run(PrintStream out, PrintStream err) { // Ready to go with the database... ObjectHeap heap = VM.getVM().getObjectHeap(); sun.jvm.hotspot.oops.ObjectHistogram histogram = new sun.jvm.hotspot.oops.ObjectHistogram(); err.println("Iterating over heap. This may take a while..."); long startTime = System.currentTimeMillis(); heap.iterate(histogram); long endTime = System.currentTimeMillis(); histogram.printOn(out); float secs = (float) (endTime - startTime) / 1000.0f; err.println("Heap traversal took " + secs + " seconds."); } public static void main(String[] args) { ObjectHistogram oh = new ObjectHistogram(); oh.start(args); oh.stop(); } }