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annotate src/share/vm/gc_implementation/g1/g1AllocRegion.inline.hpp @ 20445:e5668dcf12e9

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8057818: collect allocation context statistics at gc pauses Reviewed-by: mikael, jmasa
author jcoomes
date Wed, 10 Sep 2014 13:01:13 -0700
parents 1526a938e670
children 7848fc12602b
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1 /*
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2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1ALLOCREGION_INLINE_HPP
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26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1ALLOCREGION_INLINE_HPP
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27
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28 #include "gc_implementation/g1/g1AllocRegion.hpp"
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29 #include "gc_implementation/g1/heapRegion.inline.hpp"
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30
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31 inline HeapWord* G1AllocRegion::allocate(HeapRegion* alloc_region,
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32 size_t word_size,
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33 bool bot_updates) {
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34 assert(alloc_region != NULL, err_msg("pre-condition"));
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35
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36 if (!bot_updates) {
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37 return alloc_region->allocate_no_bot_updates(word_size);
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38 } else {
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39 return alloc_region->allocate(word_size);
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40 }
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41 }
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42
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43 inline HeapWord* G1AllocRegion::par_allocate(HeapRegion* alloc_region,
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44 size_t word_size,
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45 bool bot_updates) {
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46 assert(alloc_region != NULL, err_msg("pre-condition"));
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47 assert(!alloc_region->is_empty(), err_msg("pre-condition"));
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48
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49 if (!bot_updates) {
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50 return alloc_region->par_allocate_no_bot_updates(word_size);
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51 } else {
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52 return alloc_region->par_allocate(word_size);
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53 }
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54 }
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55
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56 inline HeapWord* G1AllocRegion::attempt_allocation(size_t word_size,
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57 bool bot_updates) {
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58 assert(bot_updates == _bot_updates, ar_ext_msg(this, "pre-condition"));
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59
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60 HeapRegion* alloc_region = _alloc_region;
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61 assert(alloc_region != NULL, ar_ext_msg(this, "not initialized properly"));
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62
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63 HeapWord* result = par_allocate(alloc_region, word_size, bot_updates);
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64 if (result != NULL) {
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65 trace("alloc", word_size, result);
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66 return result;
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67 }
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68 trace("alloc failed", word_size);
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69 return NULL;
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70 }
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71
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72 inline HeapWord* G1AllocRegion::attempt_allocation_locked(size_t word_size,
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73 bool bot_updates) {
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74 // First we have to tedo the allocation, assuming we're holding the
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75 // appropriate lock, in case another thread changed the region while
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76 // we were waiting to get the lock.
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77 HeapWord* result = attempt_allocation(word_size, bot_updates);
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78 if (result != NULL) {
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79 return result;
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80 }
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81
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82 retire(true /* fill_up */);
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83 result = new_alloc_region_and_allocate(word_size, false /* force */);
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84 if (result != NULL) {
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85 trace("alloc locked (second attempt)", word_size, result);
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86 return result;
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87 }
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88 trace("alloc locked failed", word_size);
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89 return NULL;
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90 }
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91
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92 inline HeapWord* G1AllocRegion::attempt_allocation_force(size_t word_size,
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93 bool bot_updates) {
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94 assert(bot_updates == _bot_updates, ar_ext_msg(this, "pre-condition"));
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95 assert(_alloc_region != NULL, ar_ext_msg(this, "not initialized properly"));
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96
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97 trace("forcing alloc");
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98 HeapWord* result = new_alloc_region_and_allocate(word_size, true /* force */);
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99 if (result != NULL) {
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100 trace("alloc forced", word_size, result);
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101 return result;
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102 }
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103 trace("alloc forced failed", word_size);
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104 return NULL;
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105 }
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106
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107 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1ALLOCREGION_INLINE_HPP