Mercurial > hg > truffle
annotate src/share/vm/runtime/vmThread.hpp @ 10292:acac2b03a07f
8014765: VM exits if MaxTenuringThreshold is set below the default InitialTenuringThreshold, and InitialTenuringThreshold is not set
Summary: The VM exits when the condition in the subject line applies. The fix sets InitialTenuringThreshold to MaxTenuringThreshold if it is larger than MaxTenuringThreshold and InitialTenuringThreshold has not been set (is default).
Reviewed-by: jwilhelm, jmasa, brutisso, johnc
| author | tschatzl |
|---|---|
| date | Thu, 16 May 2013 23:51:51 +0200 |
| parents | f34d701e952e |
| children | be0ac0e8f6e7 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1998, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 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 | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 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. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_RUNTIME_VMTHREAD_HPP |
| 26 #define SHARE_VM_RUNTIME_VMTHREAD_HPP | |
| 27 | |
| 28 #include "runtime/perfData.hpp" | |
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29 #include "runtime/thread.inline.hpp" |
| 1972 | 30 #include "runtime/vm_operations.hpp" |
| 31 | |
| 0 | 32 // |
| 33 // Prioritized queue of VM operations. | |
| 34 // | |
| 35 // Encapsulates both queue management and | |
| 36 // and priority policy | |
| 37 // | |
| 6197 | 38 class VMOperationQueue : public CHeapObj<mtInternal> { |
| 0 | 39 private: |
| 40 enum Priorities { | |
| 41 SafepointPriority, // Highest priority (operation executed at a safepoint) | |
| 42 MediumPriority, // Medium priority | |
| 43 nof_priorities | |
| 44 }; | |
| 45 | |
| 46 // We maintain a doubled linked list, with explicit count. | |
| 47 int _queue_length[nof_priorities]; | |
| 48 int _queue_counter; | |
| 49 VM_Operation* _queue [nof_priorities]; | |
| 50 // we also allow the vmThread to register the ops it has drained so we | |
| 51 // can scan them from oops_do | |
| 52 VM_Operation* _drain_list; | |
| 53 | |
| 54 // Double-linked non-empty list insert. | |
| 55 void insert(VM_Operation* q,VM_Operation* n); | |
| 56 void unlink(VM_Operation* q); | |
| 57 | |
| 58 // Basic queue manipulation | |
| 59 bool queue_empty (int prio); | |
| 60 void queue_add_front (int prio, VM_Operation *op); | |
| 61 void queue_add_back (int prio, VM_Operation *op); | |
| 62 VM_Operation* queue_remove_front(int prio); | |
| 63 void queue_oops_do(int queue, OopClosure* f); | |
| 64 void drain_list_oops_do(OopClosure* f); | |
| 65 VM_Operation* queue_drain(int prio); | |
| 66 // lock-free query: may return the wrong answer but must not break | |
| 67 bool queue_peek(int prio) { return _queue_length[prio] > 0; } | |
| 68 | |
| 69 public: | |
| 70 VMOperationQueue(); | |
| 71 | |
| 72 // Highlevel operations. Encapsulates policy | |
| 73 bool add(VM_Operation *op); | |
| 74 VM_Operation* remove_next(); // Returns next or null | |
| 75 VM_Operation* remove_next_at_safepoint_priority() { return queue_remove_front(SafepointPriority); } | |
| 76 VM_Operation* drain_at_safepoint_priority() { return queue_drain(SafepointPriority); } | |
| 77 void set_drain_list(VM_Operation* list) { _drain_list = list; } | |
| 78 bool peek_at_safepoint_priority() { return queue_peek(SafepointPriority); } | |
| 79 | |
| 80 // GC support | |
| 81 void oops_do(OopClosure* f); | |
| 82 | |
| 83 void verify_queue(int prio) PRODUCT_RETURN; | |
| 84 }; | |
| 85 | |
| 86 | |
| 87 // | |
| 88 // A single VMThread (the primordial thread) spawns all other threads | |
| 89 // and is itself used by other threads to offload heavy vm operations | |
| 90 // like scavenge, garbage_collect etc. | |
| 91 // | |
| 92 | |
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93 class VMThread: public NamedThread { |
| 0 | 94 private: |
| 95 static ThreadPriority _current_priority; | |
| 96 | |
| 97 static bool _should_terminate; | |
| 98 static bool _terminated; | |
| 99 static Monitor * _terminate_lock; | |
| 100 static PerfCounter* _perf_accumulated_vm_operation_time; | |
| 101 | |
| 102 void evaluate_operation(VM_Operation* op); | |
| 103 public: | |
| 104 // Constructor | |
| 105 VMThread(); | |
| 106 | |
| 107 // Tester | |
| 108 bool is_VM_thread() const { return true; } | |
| 109 bool is_GC_thread() const { return true; } | |
| 110 | |
| 111 // The ever running loop for the VMThread | |
| 112 void loop(); | |
| 113 | |
| 114 // Called to stop the VM thread | |
| 115 static void wait_for_vm_thread_exit(); | |
| 116 static bool should_terminate() { return _should_terminate; } | |
| 117 static bool is_terminated() { return _terminated == true; } | |
| 118 | |
| 119 // Execution of vm operation | |
| 120 static void execute(VM_Operation* op); | |
| 121 | |
| 122 // Returns the current vm operation if any. | |
| 123 static VM_Operation* vm_operation() { return _cur_vm_operation; } | |
| 124 | |
| 125 // Returns the single instance of VMThread. | |
| 126 static VMThread* vm_thread() { return _vm_thread; } | |
| 127 | |
| 128 // GC support | |
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129 void oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf); |
| 0 | 130 |
| 131 // Debugging | |
| 132 void print_on(outputStream* st) const; | |
| 133 void print() const { print_on(tty); } | |
| 134 void verify(); | |
| 135 | |
| 136 // Performance measurement | |
| 137 static PerfCounter* perf_accumulated_vm_operation_time() { return _perf_accumulated_vm_operation_time; } | |
| 138 | |
| 139 // Entry for starting vm thread | |
| 140 virtual void run(); | |
| 141 | |
| 142 // Creations/Destructions | |
| 143 static void create(); | |
| 144 static void destroy(); | |
| 145 | |
| 146 private: | |
| 147 // VM_Operation support | |
| 148 static VM_Operation* _cur_vm_operation; // Current VM operation | |
| 149 static VMOperationQueue* _vm_queue; // Queue (w/ policy) of VM operations | |
| 150 | |
| 151 // Pointer to single-instance of VM thread | |
| 152 static VMThread* _vm_thread; | |
| 153 }; | |
| 1972 | 154 |
| 155 #endif // SHARE_VM_RUNTIME_VMTHREAD_HPP |