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1 /* |
1 /* |
2 * Copyright (c) 2001, 2011, Oracle and/or its affiliates. All rights reserved. |
2 * Copyright (c) 2001, 2015, 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. |
74 } |
74 } |
75 return gc_time; |
75 return gc_time; |
76 } |
76 } |
77 |
77 |
78 void G1MMUTrackerQueue::add_pause(double start, double end, bool gc_thread) { |
78 void G1MMUTrackerQueue::add_pause(double start, double end, bool gc_thread) { |
79 double longest_allowed = longest_pause_internal(start); |
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80 if (longest_allowed < 0.0) |
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81 longest_allowed = 0.0; |
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82 double duration = end - start; |
79 double duration = end - start; |
83 |
80 |
84 remove_expired_entries(end); |
81 remove_expired_entries(end); |
85 if (_no_entries == QueueLength) { |
82 if (_no_entries == QueueLength) { |
86 // OK, we've filled up the queue. There are a few ways |
83 // OK, we've filled up the queue. There are a few ways |
103 } else { |
100 } else { |
104 _head_index = trim_index(_head_index + 1); |
101 _head_index = trim_index(_head_index + 1); |
105 ++_no_entries; |
102 ++_no_entries; |
106 } |
103 } |
107 _array[_head_index] = G1MMUTrackerQueueElem(start, end); |
104 _array[_head_index] = G1MMUTrackerQueueElem(start, end); |
108 } |
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109 |
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110 // basically the _internal call does not remove expired entries |
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111 // this is for trying things out in the future and a couple |
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112 // of other places (debugging) |
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113 |
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114 double G1MMUTrackerQueue::longest_pause(double current_time) { |
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115 if (_DISABLE_MMU) |
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116 return _max_gc_time; |
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117 |
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118 MutexLockerEx x(MMUTracker_lock, Mutex::_no_safepoint_check_flag); |
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119 remove_expired_entries(current_time); |
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120 |
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121 return longest_pause_internal(current_time); |
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122 } |
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123 |
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124 double G1MMUTrackerQueue::longest_pause_internal(double current_time) { |
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125 double target_time = _max_gc_time; |
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126 |
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127 while( 1 ) { |
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128 double gc_time = |
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129 calculate_gc_time(current_time + target_time); |
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130 double diff = target_time + gc_time - _max_gc_time; |
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131 if (!is_double_leq_0(diff)) { |
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132 target_time -= diff; |
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133 if (is_double_leq_0(target_time)) { |
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134 target_time = -1.0; |
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135 break; |
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136 } |
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137 } else { |
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138 break; |
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139 } |
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140 } |
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141 |
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142 return target_time; |
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143 } |
105 } |
144 |
106 |
145 // basically the _internal call does not remove expired entries |
107 // basically the _internal call does not remove expired entries |
146 // this is for trying things out in the future and a couple |
108 // this is for trying things out in the future and a couple |
147 // of other places (debugging) |
109 // of other places (debugging) |