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src/share/vm/gc_implementation/shared/generationCounters.hpp@b2ef234911c9 (annotated)
src/share/vm/gc_implementation/shared/generationCounters.hpp
Thu, 20 Sep 2012 09:52:56 -0700
- author
- johnc
- date
- Thu, 20 Sep 2012 09:52:56 -0700
- changeset 4067
- b2ef234911c9
- parent 3900
- d2a62e0f25eb
- child 4153
- b9a9ed0f8eeb
- permissions
- -rw-r--r--
7190666: G1: assert(_unused == 0) failed: Inconsistency in PLAB stats
Summary: Reset the fields in ParGCAllocBuffer, that are used for accumulating values for the ResizePLAB sensors in PLABStats, to zero after flushing the values to the PLABStats fields. Flush PLABStats values only when retiring the final allocation buffers prior to disposing of a G1ParScanThreadState object, rather than when retiring every allocation buffer.
Reviewed-by: jwilhelm, jmasa, ysr
| duke@435 | 1 | /* |
| jmasa@2821 | 2 | * Copyright (c) 2002, 2011, Oracle and/or its affiliates. All rights reserved. |
| duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| duke@435 | 4 | * |
| duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
| duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| duke@435 | 7 | * published by the Free Software Foundation. |
| duke@435 | 8 | * |
| duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| duke@435 | 13 | * accompanied this code). |
| duke@435 | 14 | * |
| duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
| duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| duke@435 | 18 | * |
| trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
| trims@1907 | 21 | * questions. |
| duke@435 | 22 | * |
| duke@435 | 23 | */ |
| duke@435 | 24 | |
| stefank@2314 | 25 | #ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_GENERATIONCOUNTERS_HPP |
| stefank@2314 | 26 | #define SHARE_VM_GC_IMPLEMENTATION_SHARED_GENERATIONCOUNTERS_HPP |
| stefank@2314 | 27 | |
| stefank@2314 | 28 | #include "runtime/perfData.hpp" |
| stefank@2314 | 29 | #include "runtime/virtualspace.hpp" |
| stefank@2314 | 30 | |
| duke@435 | 31 | // A GenerationCounter is a holder class for performance counters |
| duke@435 | 32 | // that track a generation |
| duke@435 | 33 | |
| zgu@3900 | 34 | class GenerationCounters: public CHeapObj<mtGC> { |
| duke@435 | 35 | friend class VMStructs; |
| duke@435 | 36 | |
| tonyp@3176 | 37 | private: |
| tonyp@3176 | 38 | void initialize(const char* name, int ordinal, int spaces, |
| tonyp@3176 | 39 | size_t min_capacity, size_t max_capacity, |
| tonyp@3176 | 40 | size_t curr_capacity); |
| tonyp@3176 | 41 | |
| duke@435 | 42 | protected: |
| duke@435 | 43 | PerfVariable* _current_size; |
| duke@435 | 44 | VirtualSpace* _virtual_space; |
| duke@435 | 45 | |
| duke@435 | 46 | // Constant PerfData types don't need to retain a reference. |
| duke@435 | 47 | // However, it's a good idea to document them here. |
| duke@435 | 48 | // PerfStringConstant* _name; |
| duke@435 | 49 | // PerfConstant* _min_size; |
| duke@435 | 50 | // PerfConstant* _max_size; |
| duke@435 | 51 | // PerfConstant* _spaces; |
| duke@435 | 52 | |
| duke@435 | 53 | char* _name_space; |
| duke@435 | 54 | |
| duke@435 | 55 | // This constructor is only meant for use with the PSGenerationCounters |
| tonyp@3176 | 56 | // constructor. The need for such an constructor should be eliminated |
| duke@435 | 57 | // when VirtualSpace and PSVirtualSpace are unified. |
| tonyp@3176 | 58 | GenerationCounters() |
| tonyp@3176 | 59 | : _name_space(NULL), _current_size(NULL), _virtual_space(NULL) {} |
| tonyp@3176 | 60 | |
| tonyp@3176 | 61 | // This constructor is used for subclasses that do not have a space |
| tonyp@3176 | 62 | // associated with them (e.g, in G1). |
| tonyp@3176 | 63 | GenerationCounters(const char* name, int ordinal, int spaces, |
| tonyp@3176 | 64 | size_t min_capacity, size_t max_capacity, |
| tonyp@3176 | 65 | size_t curr_capacity); |
| tonyp@3176 | 66 | |
| duke@435 | 67 | public: |
| duke@435 | 68 | GenerationCounters(const char* name, int ordinal, int spaces, |
| duke@435 | 69 | VirtualSpace* v); |
| duke@435 | 70 | |
| duke@435 | 71 | ~GenerationCounters() { |
| zgu@3900 | 72 | if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space, mtGC); |
| duke@435 | 73 | } |
| duke@435 | 74 | |
| tonyp@3176 | 75 | virtual void update_all(); |
| duke@435 | 76 | |
| duke@435 | 77 | const char* name_space() const { return _name_space; } |
| jmasa@2821 | 78 | |
| duke@435 | 79 | }; |
| stefank@2314 | 80 | #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_GENERATIONCOUNTERS_HPP |
