1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/gc_implementation/g1/heapRegionBounds.hpp Tue Sep 09 04:48:41 2014 +0200
1.3 @@ -0,0 +1,52 @@
1.4 +/*
1.5 + * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGIONBOUNDS_HPP
1.29 +#define SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGIONBOUNDS_HPP
1.30 +
1.31 +class HeapRegionBounds : public AllStatic {
1.32 +private:
1.33 + // Minimum region size; we won't go lower than that.
1.34 + // We might want to decrease this in the future, to deal with small
1.35 + // heaps a bit more efficiently.
1.36 + static const size_t MIN_REGION_SIZE = 1024 * 1024;
1.37 +
1.38 + // Maximum region size; we don't go higher than that. There's a good
1.39 + // reason for having an upper bound. We don't want regions to get too
1.40 + // large, otherwise cleanup's effectiveness would decrease as there
1.41 + // will be fewer opportunities to find totally empty regions after
1.42 + // marking.
1.43 + static const size_t MAX_REGION_SIZE = 32 * 1024 * 1024;
1.44 +
1.45 + // The automatic region size calculation will try to have around this
1.46 + // many regions in the heap (based on the min heap size).
1.47 + static const size_t TARGET_REGION_NUMBER = 2048;
1.48 +
1.49 +public:
1.50 + static inline size_t min_size();
1.51 + static inline size_t max_size();
1.52 + static inline size_t target_number();
1.53 +};
1.54 +
1.55 +#endif // SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGIONBOUNDS_HPP
