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comparison src/share/vm/utilities/bitMap.hpp @ 3771:842b840e67db

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7046558: G1: concurrent marking optimizations Summary: Some optimizations to improve the concurrent marking phase: specialize the main oop closure, make sure a few methods in the fast path are properly inlined, a few more bits and pieces, and some cosmetic fixes. Reviewed-by: stefank, johnc
author tonyp
date Tue, 14 Jun 2011 10:33:43 -0400
parents f95d63e2154a
children 2a0172480595
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3770:74cd10898bea 3771:842b840e67db
1 /* 1 /*
2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 1997, 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.
159 return word_align_up(bit) == bit; 159 return word_align_up(bit) == bit;
160 } 160 }
161 161
162 // Set or clear the specified bit. 162 // Set or clear the specified bit.
163 inline void set_bit(idx_t bit); 163 inline void set_bit(idx_t bit);
164 void clear_bit(idx_t bit); 164 inline void clear_bit(idx_t bit);
165 165
166 // Atomically set or clear the specified bit. 166 // Atomically set or clear the specified bit.
167 bool par_set_bit(idx_t bit); 167 inline bool par_set_bit(idx_t bit);
168 bool par_clear_bit(idx_t bit); 168 inline bool par_clear_bit(idx_t bit);
169 169
170 // Put the given value at the given offset. The parallel version 170 // Put the given value at the given offset. The parallel version
171 // will CAS the value into the bitmap and is quite a bit slower. 171 // will CAS the value into the bitmap and is quite a bit slower.
172 // The parallel version also returns a value indicating if the 172 // The parallel version also returns a value indicating if the
173 // calling thread was the one that changed the value of the bit. 173 // calling thread was the one that changed the value of the bit.