Mercurial > hg > graal-jvmci-8

comparison src/share/vm/gc_implementation/parallelScavenge/psMarkSweepDecorator.cpp @ 4091:d06a2d7fcd5b

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
7110718: -XX:MarkSweepAlwaysCompactCount=0 crashes the JVM Summary: Interpret MarkSweepAlwaysCompactCount < 1 as never do full compaction Reviewed-by: ysr, tonyp, jmasa, johnc
author brutisso
date Mon, 21 Nov 2011 07:47:34 +0100
parents f95d63e2154a
children da91efe96a93
comparison
equal deleted inserted replaced
4090:a88de71c4e3a 4091:d06a2d7fcd5b
1 /* 1 /*
2 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 2001, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 * 4 *
5 * This code is free software; you can redistribute it and/or modify it 5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as 6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
94 * we don't start compacting before there is a significant gain to be made. 94 * we don't start compacting before there is a significant gain to be made.
95 * Occasionally, we want to ensure a full compaction, which is determined 95 * Occasionally, we want to ensure a full compaction, which is determined
96 * by the MarkSweepAlwaysCompactCount parameter. This is a significant 96 * by the MarkSweepAlwaysCompactCount parameter. This is a significant
97 * performance improvement! 97 * performance improvement!
98 */ 98 */
99 bool skip_dead = ((PSMarkSweep::total_invocations() % MarkSweepAlwaysCompactCount) != 0); 99 bool skip_dead = (MarkSweepAlwaysCompactCount < 1)
100 || ((PSMarkSweep::total_invocations() % MarkSweepAlwaysCompactCount) != 0);
100 101
101 size_t allowed_deadspace = 0; 102 size_t allowed_deadspace = 0;
102 if (skip_dead) { 103 if (skip_dead) {
103 const size_t ratio = allowed_dead_ratio(); 104 const size_t ratio = allowed_dead_ratio();
104 allowed_deadspace = space()->capacity_in_words() * ratio / 100; 105 allowed_deadspace = space()->capacity_in_words() * ratio / 100;